CA2468936C - Methods and compositions for sealing an expandable tubular in a wellbore - Google Patents
Methods and compositions for sealing an expandable tubular in a wellbore Download PDFInfo
- Publication number
- CA2468936C CA2468936C CA002468936A CA2468936A CA2468936C CA 2468936 C CA2468936 C CA 2468936C CA 002468936 A CA002468936 A CA 002468936A CA 2468936 A CA2468936 A CA 2468936A CA 2468936 C CA2468936 C CA 2468936C
- Authority
- CA
- Canada
- Prior art keywords
- latex
- sealing
- wellbore
- sealing composition
- styrene
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/44—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing organic binders only
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/46—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
- C09K8/467—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement containing additives for specific purposes
- C09K8/473—Density reducing additives, e.g. for obtaining foamed cement compositions
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/512—Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
- E21B33/14—Methods or devices for cementing, for plugging holes, crevices, or the like for cementing casings into boreholes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/10—Setting of casings, screens, liners or the like in wells
- E21B43/103—Setting of casings, screens, liners or the like in wells of expandable casings, screens, liners, or the like
Abstract
Methods and compositions are provided for sealing an expandable tubular in a wellbore wherein the methods basically comprise placing the expandable tubul ar in the wellbore, placing a resilient sealing composition into the wellbore, expanding the expandable tubular and allowing the sealing composition to set in the wellbore.
Description
Methods and Compositions for Sealing An Expandable Tubular In A Wellbore Background The present embodiment relates generally to a composition for sealing a subterranean zone penetrated by a wellbore and, more particularly, to methods and compositions for sealing an expandable tubular such as a pipe, pipe string, casing, liner or the like in a wellbore.
In the drilling and completion of an oil or gas well, a composition is often introduced in the wellbore for cementing casing or pipe strings. In this process, known as "primary cementing," a composition is pumped into the annular space between the walls of the wellbore and the pipe string. The composition sets in the annular space, supporting and positioning the pipe string, and forming a substantially impermeable barrier which divides the wellbore into subterranean zones. After primary cementing, the undesirable migration of fluids between zones is prevented.
Likewise, compositions are often subsequently introduced into a subterranean zone for remedial operations to recover circulation or to plug the wellbore. Most remedial operations comprise introducing a composition into the wellbore to reestablish a seal between the zones.
Previously, a variety of cement compositions have been used for cementing.
However, cement is undesirable for use with expandable casing. After the expandable casing is placed down hole, a mandrel is run through the casing to expand the casing, and expansions up to twenty five percent are possible. As cement is incompressible, expansion of the casing can lead to crushing of the cement, and consequent loss of effectiveness regarding the zones. Therefore, a resilient sealing composition with comparable strength to cement, but greater elasticity and compressibility is required for cementing expandable casing.
In the drilling and completion of an oil or gas well, a composition is often introduced in the wellbore for cementing casing or pipe strings. In this process, known as "primary cementing," a composition is pumped into the annular space between the walls of the wellbore and the pipe string. The composition sets in the annular space, supporting and positioning the pipe string, and forming a substantially impermeable barrier which divides the wellbore into subterranean zones. After primary cementing, the undesirable migration of fluids between zones is prevented.
Likewise, compositions are often subsequently introduced into a subterranean zone for remedial operations to recover circulation or to plug the wellbore. Most remedial operations comprise introducing a composition into the wellbore to reestablish a seal between the zones.
Previously, a variety of cement compositions have been used for cementing.
However, cement is undesirable for use with expandable casing. After the expandable casing is placed down hole, a mandrel is run through the casing to expand the casing, and expansions up to twenty five percent are possible. As cement is incompressible, expansion of the casing can lead to crushing of the cement, and consequent loss of effectiveness regarding the zones. Therefore, a resilient sealing composition with comparable strength to cement, but greater elasticity and compressibility is required for cementing expandable casing.
Description A sealing composition according to the present embodiment basically comprises a polymer and metal containing compound. A particularly preferred sealing composition comprises a mixture of latex, dithio carbamate, zinc oxide, and sulfur, for sealing a subterranean zone penetrated by a wellbore. The sulfur containing component vulcanizes the latex to form a solid mass which seals the zone.
Preferred polymeric sealing compositions of the present invention are resilient with comparable strength to cement but have greater elasticity and compressibility for use in cementing expandable casing.
In a first embodiment, the composition comprises a mixture of latex, dithio carbamate, zinc oxide, and sulfur. Preferably, the amount of latex is maintained at a 41-90 percent ratio by weight of the composition. The dithio carbamate is preferably present in an amount that is 0.1-2 percent of the latex by weight. The zinc oxide is preferably present in an amount that is 2-5 percent of the latex by weight.
The sulfur is preferably present in an amount that is 1-4 percent of the latex by weight.
The composition may further comprise stearic acid. The stearic acid is preferably present in an amount that is 0.1-2 percent of the latex by weight.
The composition may further comprise a weighting agent. The weighting agent is preferably present in an amount that is 0.1-150 percent of the latex by weight.
The composition may further comprise acetylenic alcohol for defoaming, such as is available from Halliburton Energy Services of Duncan, Okla., under the trademark "D-AIR3T"'." The acetylenic alcohol is preferably present in an amount that is 0.001-0.2 percent of the latex by weight.
In a second embodiment, the sealing composition comprises a mixture of latex, dithio carbamate, zinc oxide, sulfur, and a foaming agent, wherein the mixture is foamed using a gas, such as nitrogen or air, which is generally present in the range of from about 0% to about 40% by volume of the sealing composition. Preferably, the amount of latex is maintained at a 41-90 percent ratio by weight of the composition.
The dithio carbamate is preferably present in an amount that is 0.1-2 percent of the latex by weight. The zinc oxide is preferably present in an amount that is 2-5 percent of the latex by weight. The sulfur is preferably present in an amount that is 1-4 percent of the latex by weight. The foaming agent is preferably present in an amount that is 2-4 percent of the latex by weight.
The composition may further comprise stearic acid. The stearic acid is preferably present in an amount that is 0.1-2 percent of the latex by weight.
The composition may further comprise a weighting agent. The weighting agent is preferably present in an amount that is 0.1-150 percent of the latex by weight.
As will be understood by those skilled in the art, polymeric sealing compositions of the present invention may include any of a variety of well known polymers including, but not limited to, copolymers, terpolymers and interpolymers.
Latex is preferably used for either embodiment and may be any of a variety of well known rubber materials commercially available which contain unsaturation in the backbone of the polymer. These include natural rubber (cis- 1,4-polyisoprene), modified types thereof, synthetic polymers, and blends of the foregoing. The synthetic polymers include styrene/butadiene rubber, polybutadiene rubber, neoprene rubber, acrylonitrile/butadiene rubber, polyisoprene rubber, isobutylene/isoprene rubber, and ethylene/propylene rubber. Additional polymers suitable for either embodiment include an ethylene propylene diene polymer, an isobutylene-isoprene copolymer, halogenated derivatives of an isobutylene-isoprene copolymer, a butadiene-isoprene copolymer, a poly(isobutylene-co-styrene) polymer, halogenated derivatives of a poly(isobutylene-co-styrene) polymer, a poly(isobutylene-co-alkyl styrene) polymer, halogenated derivatives of a poly(isobutylene-co-alkyl styrene) polymer, a poly(isobutylene-co-haloalkyl styrene) polymer and halogenated derivatives of a poly(isobutylene-co-haloalkyl styrene) polymer. Preferably, the halogenated derivatives are halogenated with chlorine or bromine.
The metal containing compounds of the present invention may comprise zinc, tin, iron, selenium magnesium, chromium, nickel, or cadmium. Further, the compounds may be in the form of an oxide, carboxylic acid salt, a complex with a dithiocarbamate ligand, or a complex with a mercaptobenzothiazole ligand.
For either embodiment, the composition preferably includes a latex comprising a styrene/butadiene copolymer latex emulsion prepared by emulsion polymerization.
The weight ratio of styrene to butadiene in the, latex can range from 10:90 to 90:10.
The emulsion is a colloidal dispersion of the copolymer. The colloidal dispersion includes water from about 40-70% by weight of the emulsion. In addition to the dispersed copolymer, the latex often includes small quantities of an emulsifier, polymerization catalysts, chain modifying agents and the like. Also, styrene/butadiene latexes are often commercially produced as terpolymer latexes which include up to about 3% by weight of a third monomer to assist in stabilizing the latex emulsions.
Non-ionic groups which exhibit stearic effects and which contain long ethoxylate or hydrocarbon tails can also be present.
Most preferably for either embodiments, the composition includes a latex with a styrene/butadiene weight ratio of about 25:75, with the styrene/butadiene copolymer suspended in a 50% by weight aqueous emulsion, available from Halliburton Energy Services of Duncan, Okla., under the trademark "LATEX 2000TM
."
The weighting agent for either embodiment may be silica flour, such as is available from Halliburton Energy Services of Duncan, Okla., under the trademark "SSA-1Tm." Altematively, the weighting agent may be manganese oxide weighting additive, available from Halliburton Energy Services of Duncan, Okla., under the trademark "NIICROIVIAXm." Alternatively, the weighting agent may be crystalline silica with an average particle size of 10 microns, available from Halliburton Energy Services of Duncan, Okla., under the trademark "1VIICROSANDT" ."
Dithio carbamate for either embodiment is available from Halliburton Energy Services of Duncan, under the trademark "FLEXCEM COMPONENT LTM
."
The foaming agent for the second embodiment may be an ethoxylated alcohol ether sulfate surfactant, which is available from Halliburton Energy Services of Duncan, under the trademark "ZONE SEAL 2000"'." The ZONE SEAL 2000 surfactant is the subject of U.S. Patent No. 6,063,738 .
Preferred polymeric sealing compositions of the present invention are resilient with comparable strength to cement but have greater elasticity and compressibility for use in cementing expandable casing.
In a first embodiment, the composition comprises a mixture of latex, dithio carbamate, zinc oxide, and sulfur. Preferably, the amount of latex is maintained at a 41-90 percent ratio by weight of the composition. The dithio carbamate is preferably present in an amount that is 0.1-2 percent of the latex by weight. The zinc oxide is preferably present in an amount that is 2-5 percent of the latex by weight.
The sulfur is preferably present in an amount that is 1-4 percent of the latex by weight.
The composition may further comprise stearic acid. The stearic acid is preferably present in an amount that is 0.1-2 percent of the latex by weight.
The composition may further comprise a weighting agent. The weighting agent is preferably present in an amount that is 0.1-150 percent of the latex by weight.
The composition may further comprise acetylenic alcohol for defoaming, such as is available from Halliburton Energy Services of Duncan, Okla., under the trademark "D-AIR3T"'." The acetylenic alcohol is preferably present in an amount that is 0.001-0.2 percent of the latex by weight.
In a second embodiment, the sealing composition comprises a mixture of latex, dithio carbamate, zinc oxide, sulfur, and a foaming agent, wherein the mixture is foamed using a gas, such as nitrogen or air, which is generally present in the range of from about 0% to about 40% by volume of the sealing composition. Preferably, the amount of latex is maintained at a 41-90 percent ratio by weight of the composition.
The dithio carbamate is preferably present in an amount that is 0.1-2 percent of the latex by weight. The zinc oxide is preferably present in an amount that is 2-5 percent of the latex by weight. The sulfur is preferably present in an amount that is 1-4 percent of the latex by weight. The foaming agent is preferably present in an amount that is 2-4 percent of the latex by weight.
The composition may further comprise stearic acid. The stearic acid is preferably present in an amount that is 0.1-2 percent of the latex by weight.
The composition may further comprise a weighting agent. The weighting agent is preferably present in an amount that is 0.1-150 percent of the latex by weight.
As will be understood by those skilled in the art, polymeric sealing compositions of the present invention may include any of a variety of well known polymers including, but not limited to, copolymers, terpolymers and interpolymers.
Latex is preferably used for either embodiment and may be any of a variety of well known rubber materials commercially available which contain unsaturation in the backbone of the polymer. These include natural rubber (cis- 1,4-polyisoprene), modified types thereof, synthetic polymers, and blends of the foregoing. The synthetic polymers include styrene/butadiene rubber, polybutadiene rubber, neoprene rubber, acrylonitrile/butadiene rubber, polyisoprene rubber, isobutylene/isoprene rubber, and ethylene/propylene rubber. Additional polymers suitable for either embodiment include an ethylene propylene diene polymer, an isobutylene-isoprene copolymer, halogenated derivatives of an isobutylene-isoprene copolymer, a butadiene-isoprene copolymer, a poly(isobutylene-co-styrene) polymer, halogenated derivatives of a poly(isobutylene-co-styrene) polymer, a poly(isobutylene-co-alkyl styrene) polymer, halogenated derivatives of a poly(isobutylene-co-alkyl styrene) polymer, a poly(isobutylene-co-haloalkyl styrene) polymer and halogenated derivatives of a poly(isobutylene-co-haloalkyl styrene) polymer. Preferably, the halogenated derivatives are halogenated with chlorine or bromine.
The metal containing compounds of the present invention may comprise zinc, tin, iron, selenium magnesium, chromium, nickel, or cadmium. Further, the compounds may be in the form of an oxide, carboxylic acid salt, a complex with a dithiocarbamate ligand, or a complex with a mercaptobenzothiazole ligand.
For either embodiment, the composition preferably includes a latex comprising a styrene/butadiene copolymer latex emulsion prepared by emulsion polymerization.
The weight ratio of styrene to butadiene in the, latex can range from 10:90 to 90:10.
The emulsion is a colloidal dispersion of the copolymer. The colloidal dispersion includes water from about 40-70% by weight of the emulsion. In addition to the dispersed copolymer, the latex often includes small quantities of an emulsifier, polymerization catalysts, chain modifying agents and the like. Also, styrene/butadiene latexes are often commercially produced as terpolymer latexes which include up to about 3% by weight of a third monomer to assist in stabilizing the latex emulsions.
Non-ionic groups which exhibit stearic effects and which contain long ethoxylate or hydrocarbon tails can also be present.
Most preferably for either embodiments, the composition includes a latex with a styrene/butadiene weight ratio of about 25:75, with the styrene/butadiene copolymer suspended in a 50% by weight aqueous emulsion, available from Halliburton Energy Services of Duncan, Okla., under the trademark "LATEX 2000TM
."
The weighting agent for either embodiment may be silica flour, such as is available from Halliburton Energy Services of Duncan, Okla., under the trademark "SSA-1Tm." Altematively, the weighting agent may be manganese oxide weighting additive, available from Halliburton Energy Services of Duncan, Okla., under the trademark "NIICROIVIAXm." Alternatively, the weighting agent may be crystalline silica with an average particle size of 10 microns, available from Halliburton Energy Services of Duncan, Okla., under the trademark "1VIICROSANDT" ."
Dithio carbamate for either embodiment is available from Halliburton Energy Services of Duncan, under the trademark "FLEXCEM COMPONENT LTM
."
The foaming agent for the second embodiment may be an ethoxylated alcohol ether sulfate surfactant, which is available from Halliburton Energy Services of Duncan, under the trademark "ZONE SEAL 2000"'." The ZONE SEAL 2000 surfactant is the subject of U.S. Patent No. 6,063,738 .
Alternatively, the foaming agent may be an amidopropylbetaine surfactant, which is available from Halliburton Energy Services of Duncan, under the trademark "HC-2'." The HC-2"' surfactant is discussed in U.S. Patent No. 5,588,489.
The following examples are illustrative of the methods and compositions discussed above.
To test curing properties of the first embodiment, 450 grams of LATEX
2000TM latex, and components in the amounts listed in TA.BLE 1 were added to form three batches. Each of the batches was mixed in a Waring blender. The batches were poured into receptacles and incubated at the temperatures listed.
Component Batch 1 Batch 2 Batch 3 FLEXCEM
CO1VIi'ONENT LTM 5.6g 5.6g 4.5g dithio carbamate Zinc Oxide 9g 9g 22.5g Sulfur 9g 9g 13.5g Stearic acid - - 9g 4.5g D-AIR3 acetylenic 14.6g 14.6g 3g alcohol SSA-1 silica flour 600g 600g --No Set; Set; Set;
Comments 48hr at 80 F 48hr at 150 F 5.5hr at 150 F
TABLE 1 shows that the second and third batches set.
The following examples are illustrative of the methods and compositions discussed above.
To test curing properties of the first embodiment, 450 grams of LATEX
2000TM latex, and components in the amounts listed in TA.BLE 1 were added to form three batches. Each of the batches was mixed in a Waring blender. The batches were poured into receptacles and incubated at the temperatures listed.
Component Batch 1 Batch 2 Batch 3 FLEXCEM
CO1VIi'ONENT LTM 5.6g 5.6g 4.5g dithio carbamate Zinc Oxide 9g 9g 22.5g Sulfur 9g 9g 13.5g Stearic acid - - 9g 4.5g D-AIR3 acetylenic 14.6g 14.6g 3g alcohol SSA-1 silica flour 600g 600g --No Set; Set; Set;
Comments 48hr at 80 F 48hr at 150 F 5.5hr at 150 F
TABLE 1 shows that the second and third batches set.
To test curing properties of the first embodiment with a different weighting agent, 100 grams of LATEX 2000TM latex (with the exception of Batch 8), and components in the amounts listed in TABLE 2 (including a C15 alcohol ethoxylated with 15 moles of ethylene oxide, which is available from Halliburton Energy Services of Duncan, under the trademark "434B TM") were added to form eight batches.
Each of the batches was mixed in a Waring blender. The batches were poured into receptacles and incubated at the temperatures listed.
Batch Batch Batch Batch Batc Batch Batch 8 Component Batch 1 2 3 4 h 5 6 7 (500 g latex) FLEXCEM
COMPONEN
T L T"' dithio 5.6g 5.6g 0.75g 0.75g 4.5g 4.5g 1.5g 2g carbamate Zinc Oxide 9g 9g 14g 14g 22.5g 22.5g 14g 15g Sulfur 9g 9g 9g 9g 13.5g 13.5g 9g IOg Stearic acid - - - - 4.5g - - - - - - - - - -acetylenic 14.6g 14.6g 3g 3g 3g 3g -- 5g alcohol MICROMAX
TM manganese 600g 600g 400g 400g 400g 400g 400g 400g oxide (15.3lb/gal) Batch Batch Batch Batch Batc Batch Batch 8 Component Batch 1 2 3 4 h 5 6 7 (500 g latex) ethoxylated -- 45g 45g 45g 45g 45g 26g lOg alcohol Set;
No set; No set; No set; No set; No set; No set;
Latex 48hr Comments 48hr at 24hr at 24hr at 48hr at 24hr at 72hr at inverted at TABLE 2 shows that the fifth batch set without stearic acid.
To test curing properties of the second embodiment, LATEX 2000"' latex in the amounts listed in TABLES 3A and 3B, were mixed with components in the amounts listed in TABLES 3A and 3B (including a C15 alcohol ethoxylated with moles of ethylene oxide, which is available from Halliburton Energy Services of Duncan, under the trademark "434CrM", a sodium salt of alpha-olefinic sulfonic acid surfactant which is discussed in U.S. Patent No. 5,588,489, and is available from Halliburton Energy Services of Duncan, under the trademark "AQF-2TM", an alcohol ether sulfate surfactant which is discussed in U.S. Patent No. 5,588,489, and is available from Halliburton Energy Services of Duncan, under the trademark "HOWCO SUDS'"", and ammonium decasulfate, which is available from Halliburton Energy Services of Duncan, under the trademark "CFASTM") were added to form twelve batches. Each of the batches was mixed in a Waring blender with a sealable metal canister. The batches were poured into receptacles and incubated at the temperatures listed.
Components Batch 1 Batch 2 Batch 3 Batch 4 Batch 5 Batch 6 Batch 7 LATEX
2000TM latex 450g 450g 450g 450g 450g 600g 600g FLEXCEM
COMPONEN
T LTM dithio 5.6g 5.6g 5.6g 5.6g 5.6g 6g 6g carbamate Zinc Oxide 9g 9g 9g 9g 9g 30g 30g Sulfur 9g 9g 9g 9g 9g 18g 18g Stearic acid 9g 9g 9g 9g 9g -- --acetylenic 14.6g 14.6g - - - - - - - - - -alcohol SSA-1 TM silica flour 600g 600g - - - - - - - - - -ZONE SEAL
2000TM 9g 18g -- 20g 20g -- --surfactant MICROSAND
TM crystalline - - - - 600g 600g 600g - - - -silica ethoxylated - - - - 45g 45g 45g - - - -alcohol -- -- 9g -- -- -- --surfactant Components Batch 1 Batch 2 Batch 3 Batch 4 Batch 5 Batch 6 Batch 7 -- -- -- --surfactant 4.5g lOg 5g HOWCO
SUDSTM -- -- -- -- -- -- lOg surfactant CFAST"' ammonium - - - - - - - - - - - - -decasulfate Unstable Unstable Unstable Unstable Unstable Unstable Unstable Comments foam foam foam foam foam foam foam Components Batch 8 Batch 9 Batch 10 Batch 11 Batch 12 LATEX
2000TM latex 600g 600g 600g 600g 675g FLEXCEM
COMPONENT
L TM dithio 6g 6g 6g 6g 8.4g carbamate Zinc Oxide 30g 30g 30g 30g 13.5g Sulfur 18g 18g 18g 18g 13.5g Stearic acid - - - - - - - - 13.5g D-AIR3 I'M
acetylenic - - - - - - - - - -alcohol SSA-1 silica flour -- -- -- -- --Components Batch 8 Batch 9 Batch 10 Batch 11 Batch 12 ZONE SEAL
2000TM - - - - - - - - 20g surfactant MICROSAND
M crystalline -- -- 200g 200g 600g silica ethoxylated - - - - - - - - - -alcohol -- -- -- --surfactant lOg 5g 5g 12g 20g --surfactant HOWCO
SUDSTM
-- -- -- -- --surfactant CFASTM
ammonium - - lOg - - - - - -decasulfate Foamed and placed in Foamed and cell; heated to 190 F
placed in cell Unstable Unstable Unstable for 2 hours; sand Comments for 48 hours at foam foam foam 150 F; set settled from top 1-2 inches of 8 inch stable foam column TABLES 3A and 3B show that the eleventh and twelfth batches set.
Each of the batches was mixed in a Waring blender. The batches were poured into receptacles and incubated at the temperatures listed.
Batch Batch Batch Batch Batc Batch Batch 8 Component Batch 1 2 3 4 h 5 6 7 (500 g latex) FLEXCEM
COMPONEN
T L T"' dithio 5.6g 5.6g 0.75g 0.75g 4.5g 4.5g 1.5g 2g carbamate Zinc Oxide 9g 9g 14g 14g 22.5g 22.5g 14g 15g Sulfur 9g 9g 9g 9g 13.5g 13.5g 9g IOg Stearic acid - - - - 4.5g - - - - - - - - - -acetylenic 14.6g 14.6g 3g 3g 3g 3g -- 5g alcohol MICROMAX
TM manganese 600g 600g 400g 400g 400g 400g 400g 400g oxide (15.3lb/gal) Batch Batch Batch Batch Batc Batch Batch 8 Component Batch 1 2 3 4 h 5 6 7 (500 g latex) ethoxylated -- 45g 45g 45g 45g 45g 26g lOg alcohol Set;
No set; No set; No set; No set; No set; No set;
Latex 48hr Comments 48hr at 24hr at 24hr at 48hr at 24hr at 72hr at inverted at TABLE 2 shows that the fifth batch set without stearic acid.
To test curing properties of the second embodiment, LATEX 2000"' latex in the amounts listed in TABLES 3A and 3B, were mixed with components in the amounts listed in TABLES 3A and 3B (including a C15 alcohol ethoxylated with moles of ethylene oxide, which is available from Halliburton Energy Services of Duncan, under the trademark "434CrM", a sodium salt of alpha-olefinic sulfonic acid surfactant which is discussed in U.S. Patent No. 5,588,489, and is available from Halliburton Energy Services of Duncan, under the trademark "AQF-2TM", an alcohol ether sulfate surfactant which is discussed in U.S. Patent No. 5,588,489, and is available from Halliburton Energy Services of Duncan, under the trademark "HOWCO SUDS'"", and ammonium decasulfate, which is available from Halliburton Energy Services of Duncan, under the trademark "CFASTM") were added to form twelve batches. Each of the batches was mixed in a Waring blender with a sealable metal canister. The batches were poured into receptacles and incubated at the temperatures listed.
Components Batch 1 Batch 2 Batch 3 Batch 4 Batch 5 Batch 6 Batch 7 LATEX
2000TM latex 450g 450g 450g 450g 450g 600g 600g FLEXCEM
COMPONEN
T LTM dithio 5.6g 5.6g 5.6g 5.6g 5.6g 6g 6g carbamate Zinc Oxide 9g 9g 9g 9g 9g 30g 30g Sulfur 9g 9g 9g 9g 9g 18g 18g Stearic acid 9g 9g 9g 9g 9g -- --acetylenic 14.6g 14.6g - - - - - - - - - -alcohol SSA-1 TM silica flour 600g 600g - - - - - - - - - -ZONE SEAL
2000TM 9g 18g -- 20g 20g -- --surfactant MICROSAND
TM crystalline - - - - 600g 600g 600g - - - -silica ethoxylated - - - - 45g 45g 45g - - - -alcohol -- -- 9g -- -- -- --surfactant Components Batch 1 Batch 2 Batch 3 Batch 4 Batch 5 Batch 6 Batch 7 -- -- -- --surfactant 4.5g lOg 5g HOWCO
SUDSTM -- -- -- -- -- -- lOg surfactant CFAST"' ammonium - - - - - - - - - - - - -decasulfate Unstable Unstable Unstable Unstable Unstable Unstable Unstable Comments foam foam foam foam foam foam foam Components Batch 8 Batch 9 Batch 10 Batch 11 Batch 12 LATEX
2000TM latex 600g 600g 600g 600g 675g FLEXCEM
COMPONENT
L TM dithio 6g 6g 6g 6g 8.4g carbamate Zinc Oxide 30g 30g 30g 30g 13.5g Sulfur 18g 18g 18g 18g 13.5g Stearic acid - - - - - - - - 13.5g D-AIR3 I'M
acetylenic - - - - - - - - - -alcohol SSA-1 silica flour -- -- -- -- --Components Batch 8 Batch 9 Batch 10 Batch 11 Batch 12 ZONE SEAL
2000TM - - - - - - - - 20g surfactant MICROSAND
M crystalline -- -- 200g 200g 600g silica ethoxylated - - - - - - - - - -alcohol -- -- -- --surfactant lOg 5g 5g 12g 20g --surfactant HOWCO
SUDSTM
-- -- -- -- --surfactant CFASTM
ammonium - - lOg - - - - - -decasulfate Foamed and placed in Foamed and cell; heated to 190 F
placed in cell Unstable Unstable Unstable for 2 hours; sand Comments for 48 hours at foam foam foam 150 F; set settled from top 1-2 inches of 8 inch stable foam column TABLES 3A and 3B show that the eleventh and twelfth batches set.
To test curing properties of the first embodiment, 300 grams of LATEX
2000Tm latex, 2 grams D-AIR3Tm acetylenic alcohol, and components in the amounts listed in TABLE 4 were added to form eight batches. Each of the batches was mixed in a Waring blender. The batches were poured into receptacles and incubated in a 150 F water bath.
Batch Batch Batch Batch Batch Batch Batch Batch Component FLEXCEM
COMPONEN
T L TM dithio 3g 3g 3g -- -- -- -- 3g carbamate Zinc Oxide - - 15g 15g 15g 15g - - - - - -Sulfur 9g -- 9g 9g -- 9g -- --Stearic acid 3g 3g - - 3g - - - - 3g - -Comments No set No set Set No set No set No set No set No set TABLE 4 shows that the fourth batch set.
To test shear bond properties of the first embodiment, 450 grams of LATEX
2000TM latex, 1.5 grams of FLEXCEM COMPONENT LT"t dithio carbamate, 2 grams of D-AIR3T"' acetylenic alcohol, and components in the amounts listed in TABLE
were added to form eight batches. Each of the batches was mixed in a Waring blender. The batches were poured into receptacles and incubated before having their shear bond strengths tested. Batches 1-4 were tested after incubation for 48 hours at 200 F. Batches 5-8 were tested after incubation for 12 days at 200 F.
In a conventional shear bond test, the batches were placed in metal cylinders with a metal bar disposed in each of the cylinders. Once a batch set, the bar was supported and positioned by the composition. Shear bond strength was detennined by the force required to push the bar out of the cylinder. The shear bond testing method is conventional, and is described in a paper by L. G. Carter and G. W. Evans entitled "A Study of Cement-Pipe Bonding," presented at the Society of Petroleum Engineers California Regional Meeting, held in Santa Barbara, CA, on Oct 24-25, 1963.
Batch Batch Batch Batch Batch Batch Batch Batch Component Zinc Oxide 13.5g 13.5g 27g 27g 13.5g 13.5g 13.5g 13.5g Sulfur 9g 18g 9g 18g 9g 9g 9g 9g silica flour 600g 600g 600g 600g -- 200g 400g 600g Shear bond 21 psi 14 psi 26 psi 22 psi 11 psi 28 psi 34 psi 34 psi TABLE 5 shows that all the batches bond to metal. Batch 1 also shear bond strengths of 40 psi at 72 hours, 38 psi at 96 hours, and 55 psi at 30 days.
To test thickening times (TT) for reaching viscosities of 70 BC for the first embodiment, 600 grams of LATEX 2000Tm latex, 3 grams of D-AIR3TM acetylenic alcohol, and components listed in the amounts listed in TABLE 6 were added to form ten batches. Each of the batches was mixed in a Waring blender. The batches were poured into receptacles and incubated at the temperatures listed in TABLE 6.
2000Tm latex, 2 grams D-AIR3Tm acetylenic alcohol, and components in the amounts listed in TABLE 4 were added to form eight batches. Each of the batches was mixed in a Waring blender. The batches were poured into receptacles and incubated in a 150 F water bath.
Batch Batch Batch Batch Batch Batch Batch Batch Component FLEXCEM
COMPONEN
T L TM dithio 3g 3g 3g -- -- -- -- 3g carbamate Zinc Oxide - - 15g 15g 15g 15g - - - - - -Sulfur 9g -- 9g 9g -- 9g -- --Stearic acid 3g 3g - - 3g - - - - 3g - -Comments No set No set Set No set No set No set No set No set TABLE 4 shows that the fourth batch set.
To test shear bond properties of the first embodiment, 450 grams of LATEX
2000TM latex, 1.5 grams of FLEXCEM COMPONENT LT"t dithio carbamate, 2 grams of D-AIR3T"' acetylenic alcohol, and components in the amounts listed in TABLE
were added to form eight batches. Each of the batches was mixed in a Waring blender. The batches were poured into receptacles and incubated before having their shear bond strengths tested. Batches 1-4 were tested after incubation for 48 hours at 200 F. Batches 5-8 were tested after incubation for 12 days at 200 F.
In a conventional shear bond test, the batches were placed in metal cylinders with a metal bar disposed in each of the cylinders. Once a batch set, the bar was supported and positioned by the composition. Shear bond strength was detennined by the force required to push the bar out of the cylinder. The shear bond testing method is conventional, and is described in a paper by L. G. Carter and G. W. Evans entitled "A Study of Cement-Pipe Bonding," presented at the Society of Petroleum Engineers California Regional Meeting, held in Santa Barbara, CA, on Oct 24-25, 1963.
Batch Batch Batch Batch Batch Batch Batch Batch Component Zinc Oxide 13.5g 13.5g 27g 27g 13.5g 13.5g 13.5g 13.5g Sulfur 9g 18g 9g 18g 9g 9g 9g 9g silica flour 600g 600g 600g 600g -- 200g 400g 600g Shear bond 21 psi 14 psi 26 psi 22 psi 11 psi 28 psi 34 psi 34 psi TABLE 5 shows that all the batches bond to metal. Batch 1 also shear bond strengths of 40 psi at 72 hours, 38 psi at 96 hours, and 55 psi at 30 days.
To test thickening times (TT) for reaching viscosities of 70 BC for the first embodiment, 600 grams of LATEX 2000Tm latex, 3 grams of D-AIR3TM acetylenic alcohol, and components listed in the amounts listed in TABLE 6 were added to form ten batches. Each of the batches was mixed in a Waring blender. The batches were poured into receptacles and incubated at the temperatures listed in TABLE 6.
Component Bat. Bat. Bat. Bat. Bat. Bat. Bat. Bat. Bat. Bat.
FLEXCEM
COMPONEN
T LTM dithio 6g 0.75g 0.75g l.lg 0.75g lg lg 2g --carbamate Zinc Oxide 30g 3g 6g 12g 18g 18g 18g 18g 18g 18g Sulfur 18g 12g 12g 12g 12g 12g 12g 12g 12g 12g Stearic acid 6g 6g 6g 6g 6g 12g - - -- 12g --TT (hr:min) at 1:39;
--150 F 1:53 12+ 10:26 8:20 7:37 7:44 6:00 3:39 - -TT (hr:min) at -- -- -- -- -- 1:59 1:45 1:35 6:42 11+
TABLE 6 shows that the set up times can be controlled by varying the amounts of components.
To test applied pressure for the first and second embodiments, LATEX 2000TI"
latex, and components listed in the amounts listed in TABLE 7 were added to form three batches. Each of the batches was mixed in a Waring blender.
The first batch, representing the first embodiment, was poured into a test cell, which was sealed and heated to 200 F for 72 hours. After 72 hours, a valve positioned under a 325 mesh screen on the bottom of the test cell was opened, and a force of 1000 psi was applied to the test cell via a piston from the top of the cell.
After approximately an hour, the volume of the batch had reduced by an amount listed in TABLE 7.
The second batch, representing the second embodiment, was poured into a test cell, which was sealed and heated to 170 F. After 48 hours, a force of 1000 psi was applied to the test cell via a piston, and the volume of the batch had reduced by an amount listed in TABLE 7. After seven days, pressure was released, and the volume of the batch returned to 85% of its original size.
The third batch, representing the second embodiment, was poured into a test cell, heated to 170 F, and thereafter, a force of 1000 psi was applied to the test cell via a piston. The volume of the batch was reduced by an amount listed in TABLE 7.
After twenty four hours, pressure was released, and the volume of the batch returned to its original size. Thereafter, a force of 1000 psi was applied again and the volume of the batch was reduced by an amount listed in TABLE 7. After twenty four hours, pressure was again released, and the volume of the batch returned to 88% of its original size.
Batch 1 Batch 2 Batch 3 Component Non-foamed Latex Set Foamed Latex Liquid Foam Latex LATEX 2000 latex 450g 600g 600g FLEXCEM
COMPONENT LTM 1.5g 6g 6g dithio carbamate Zinc Oxide 13.5g 30g 30 Sulfur 9g 18g 6g HC-2TM surfactant - - 20g 20g SSA-1 silica flour 400g - - - -Volume reduction 30% 40% 36%
TABLE 7 shows that the first embodiment is compressible in its set state when placed against a porous geological formation, and the second embodiment is compressible in both set and unset states when placed in a sealed system.
The methods of the present invention for sealing an expandable tubular such as a pipe, pipe string, casing, liner or the like in a wellbore in a subterranean formation basically comprise placing the expandable tubular in the wellbore, placing a sealing composition as described herein into the wellbore, expanding the expandable tubular, and allowing the sealing composition to set in the wellbore. The methods may optionally comprise the step of foaming the sealant composition using a gas such as nitrogen or air. In performing the described methods, the step of placing the expandable tubular in the wellbore may be performed before or after the step of placing the sealing composition into the wellbore. The step of expanding the expandable tubular may also be performed before or after the step of placing the sealing composition into the wellbore. Furthermore, the expandable tubular may be expanded before, after or during the set of the sealing composition. Where the tubular is expanded during or after the set of the sealing composition, preferred resilient compositions of the present invention will remain competent due to their elasticity and compressibility.
In addition to the foregoing methods, the wellbore may extend or be additionally extended into the subterranean formation below the first tubular wherein a second tubular, such as a pipe, pipe string, casing, liner or the like, is placed in the wellbore below the first tubular such that a portion of the second tubular extends into the first tubular. A second sealing composition, in accordance to the embodiments described herein, is placed in the wellbore located below the first tubular and the second tubular is expanded in the wellbore. The step of placing the second tubular in the wellbore may be performed before or after the step of placing the second sealing composition into the wellbore and the step of expanding the second tubular may also be performed before or after the step of placing the second sealing composition into the wellbore. The second tubular may also be expanded before, after or during the set of the either sealing composition. Furthermore, although the first and second tubulars may be expanded at the same time, when the second tubular is expanded inside the previously expanded first tubular, the second tubular may provide additional expansion to an overlapping portion of the first tubular whereby the sealing composition located behind that overlapping portion of the first tubular is further compressed thereby but remains competent due to its elasticity and compressibility.
Although only a few exemplary embodiments of this invention have been described in detail above, those skilled in the art will readily appreciate that many other modifications are possible in the exemplary embodiments without materially departing from the novel teachings and advantages of this invention.
Accordingly, all such modifications are intended to be included within the scope of this invention as defined in the following claims.
FLEXCEM
COMPONEN
T LTM dithio 6g 0.75g 0.75g l.lg 0.75g lg lg 2g --carbamate Zinc Oxide 30g 3g 6g 12g 18g 18g 18g 18g 18g 18g Sulfur 18g 12g 12g 12g 12g 12g 12g 12g 12g 12g Stearic acid 6g 6g 6g 6g 6g 12g - - -- 12g --TT (hr:min) at 1:39;
--150 F 1:53 12+ 10:26 8:20 7:37 7:44 6:00 3:39 - -TT (hr:min) at -- -- -- -- -- 1:59 1:45 1:35 6:42 11+
TABLE 6 shows that the set up times can be controlled by varying the amounts of components.
To test applied pressure for the first and second embodiments, LATEX 2000TI"
latex, and components listed in the amounts listed in TABLE 7 were added to form three batches. Each of the batches was mixed in a Waring blender.
The first batch, representing the first embodiment, was poured into a test cell, which was sealed and heated to 200 F for 72 hours. After 72 hours, a valve positioned under a 325 mesh screen on the bottom of the test cell was opened, and a force of 1000 psi was applied to the test cell via a piston from the top of the cell.
After approximately an hour, the volume of the batch had reduced by an amount listed in TABLE 7.
The second batch, representing the second embodiment, was poured into a test cell, which was sealed and heated to 170 F. After 48 hours, a force of 1000 psi was applied to the test cell via a piston, and the volume of the batch had reduced by an amount listed in TABLE 7. After seven days, pressure was released, and the volume of the batch returned to 85% of its original size.
The third batch, representing the second embodiment, was poured into a test cell, heated to 170 F, and thereafter, a force of 1000 psi was applied to the test cell via a piston. The volume of the batch was reduced by an amount listed in TABLE 7.
After twenty four hours, pressure was released, and the volume of the batch returned to its original size. Thereafter, a force of 1000 psi was applied again and the volume of the batch was reduced by an amount listed in TABLE 7. After twenty four hours, pressure was again released, and the volume of the batch returned to 88% of its original size.
Batch 1 Batch 2 Batch 3 Component Non-foamed Latex Set Foamed Latex Liquid Foam Latex LATEX 2000 latex 450g 600g 600g FLEXCEM
COMPONENT LTM 1.5g 6g 6g dithio carbamate Zinc Oxide 13.5g 30g 30 Sulfur 9g 18g 6g HC-2TM surfactant - - 20g 20g SSA-1 silica flour 400g - - - -Volume reduction 30% 40% 36%
TABLE 7 shows that the first embodiment is compressible in its set state when placed against a porous geological formation, and the second embodiment is compressible in both set and unset states when placed in a sealed system.
The methods of the present invention for sealing an expandable tubular such as a pipe, pipe string, casing, liner or the like in a wellbore in a subterranean formation basically comprise placing the expandable tubular in the wellbore, placing a sealing composition as described herein into the wellbore, expanding the expandable tubular, and allowing the sealing composition to set in the wellbore. The methods may optionally comprise the step of foaming the sealant composition using a gas such as nitrogen or air. In performing the described methods, the step of placing the expandable tubular in the wellbore may be performed before or after the step of placing the sealing composition into the wellbore. The step of expanding the expandable tubular may also be performed before or after the step of placing the sealing composition into the wellbore. Furthermore, the expandable tubular may be expanded before, after or during the set of the sealing composition. Where the tubular is expanded during or after the set of the sealing composition, preferred resilient compositions of the present invention will remain competent due to their elasticity and compressibility.
In addition to the foregoing methods, the wellbore may extend or be additionally extended into the subterranean formation below the first tubular wherein a second tubular, such as a pipe, pipe string, casing, liner or the like, is placed in the wellbore below the first tubular such that a portion of the second tubular extends into the first tubular. A second sealing composition, in accordance to the embodiments described herein, is placed in the wellbore located below the first tubular and the second tubular is expanded in the wellbore. The step of placing the second tubular in the wellbore may be performed before or after the step of placing the second sealing composition into the wellbore and the step of expanding the second tubular may also be performed before or after the step of placing the second sealing composition into the wellbore. The second tubular may also be expanded before, after or during the set of the either sealing composition. Furthermore, although the first and second tubulars may be expanded at the same time, when the second tubular is expanded inside the previously expanded first tubular, the second tubular may provide additional expansion to an overlapping portion of the first tubular whereby the sealing composition located behind that overlapping portion of the first tubular is further compressed thereby but remains competent due to its elasticity and compressibility.
Although only a few exemplary embodiments of this invention have been described in detail above, those skilled in the art will readily appreciate that many other modifications are possible in the exemplary embodiments without materially departing from the novel teachings and advantages of this invention.
Accordingly, all such modifications are intended to be included within the scope of this invention as defined in the following claims.
Claims (31)
1. A method of sealing expandable tubulars in a wellbore comprising the steps of:
(a) placing a first expandable tubular in the wellbore;
(b) placing a first resilient sealing composition into the wellbore before or after step (a);
(c) expanding the first expandable tubular before or after step (b);
(d) allowing the first resilient sealing composition to set in the wellbore before, after or during step (c);
(e) having or extending the wellbore below the first expandable tubular;
(f) placing a second expandable tubular in the wellbore;
(g) placing a second resilient sealing composition into the wellbore before or after step (f);
(h) expanding the second expandable tubular before or after step (g);
and (i) allowing the second resilient sealing composition to set in the wellbore before, after or during step (h).
(a) placing a first expandable tubular in the wellbore;
(b) placing a first resilient sealing composition into the wellbore before or after step (a);
(c) expanding the first expandable tubular before or after step (b);
(d) allowing the first resilient sealing composition to set in the wellbore before, after or during step (c);
(e) having or extending the wellbore below the first expandable tubular;
(f) placing a second expandable tubular in the wellbore;
(g) placing a second resilient sealing composition into the wellbore before or after step (f);
(h) expanding the second expandable tubular before or after step (g);
and (i) allowing the second resilient sealing composition to set in the wellbore before, after or during step (h).
2. The method of claim 1 wherein at least one of said first and second sealing compositions comprises a polymer selected from the group consisting of a copolymer, terpolymer or an interpolymer.
3. The method of claim 1 wherein at least one of said first and second sealing compositions comprises latex and sulfur.
4. The method of claim 3 wherein the latex comprises a styrene/butadiene copolymer.
5. The method of claim 3 wherein the latex is selected from the group consisting of natural rubber, modified natural rubber, synthetic polymers and blends thereof.
6. The method of claim 5 wherein the synthetic polymers are selected from the group consisting of styrene/butadiene rubber, polybutadiene rubber, neoprene rubber, acrylonitrile/butadiene rubber, polyisoprene rubber, isobutylene/isoprene rubber and ethylene/propylene rubber.
7. The method of claim 1 wherein at least one of said first and second sealing compositions comprises a polymer selected from the group consisting of an ethylene propylenediene polymer, an isobutylene-isoprene copolymer, halogenated derivatives of an isobutylene-isoprene copolymer, a butadiene-isoprene copolymer, a poly(isobutylene-co-styrene) polymer, halogenated derivatives of a poly(isobutylene-co-styrene) polymer, a poly (isobutylene-co-alkyl styrene) polymer, halogenated derivatives of a poly(isobutylene-co-alkyl styrene) polymer, a poly(isobutylene-co-haloalkyl styrene) polymer and halogenated derivatives of a poly (isobutylene-co-haloalkyl styrene) polymer.
8. The method of claim 1 wherein at least one of said first and second sealing compositions comprises latex, dithio carbamate, metal containing compound and sulfur.
9. The method of claim 8, wherein the metal containing compound comprises zinc, tin, iron, selenium, magnesium, chromium, nickel or cadmium.
10. The method of claim 9 wherein the metal containing compound comprises an oxide; a carboxylic acid salt, a complex with a dithiocarbamate ligand or a complex with a mercaptobenzothiazole ligand.
11. The method of claim 1 wherein at least one of said first and second sealing compositions is foamed with a gas.
12. The method of claim 11 wherein the gas is generally present in an amount up to about 40% by volume of the sealing composition.
13. The method of claim 11 further comprising the steps of:
(i) extending the second tubular into the first tubular after the first tubular has been expanded and the first sealing composition is placed in the wellbore (j) expanding the second tubular in the first tubular; and (k) providing additional expansion to said first tubular wherein the first sealing composition is further compressed but remains competent.
(i) extending the second tubular into the first tubular after the first tubular has been expanded and the first sealing composition is placed in the wellbore (j) expanding the second tubular in the first tubular; and (k) providing additional expansion to said first tubular wherein the first sealing composition is further compressed but remains competent.
14. The method of claim 1 wherein at least one of said first and second sealing compositions comprises a polymer and a metal containing compound.
15 The method of claim 3 wherein the latex has a styrene/butadiene weight ratio of about 25:75, with the styrene/butadiene copolymer suspended in a 50%
by weight aqueous emulsion.
by weight aqueous emulsion.
16. The method of claim 3 wherein the latex is present in a range of 41%
to 90% by weight of the sealing composition.
to 90% by weight of the sealing composition.
17. The method of claim 14 wherein the metal containing compound comprises zinc, tin, iron, selenium, magnesium, chromium, nickel or cadmium.
18. The method of claim 17 wherein the metal containing compound comprises an oxide; a carboxylic acid salt, a complex with a dithiocarbamate ligand, or a complex with a mercaptobenzothiazole ligand.
19. The method of claim 8 wherein the metal containing compound is zinc oxide.
20. The method of claim 8 wherein the latex is a styrene/butadiene copolymer latex emulsion.
21. The method of claim 8 wherein the latex is present in a range of 41%
to 90% by weight of the sealing composition.
to 90% by weight of the sealing composition.
22. The method of claim 8 wherein the dithio carbamate is present in a range of 0.1% to 2% by weight of the latex in the sealing composition.
23. The method of claim 8 wherein the metal containing compound is present in a range of 2% to 5% by weight of the latex in the sealing composition.
24. The method of claim 8 wherein the sulfur is present in a range of 1%
to 4% by weight of the latex in the sealing composition.
to 4% by weight of the latex in the sealing composition.
25. The method of claim 8 wherein at least one of said first and second sealing compositions further comprises stearic acid.
26. The method of claim 25 wherein the stearic acid is present in a range of 0.1%to 2% by weight of the latex in the sealing composition.
27. The method of claim 8 wherein at least one of said first and second sealing compositions further comprises a weighting agent.
28. The method of claim 27 wherein the weighting agent is present in a range of 0.1% to 150% by weight of the latex in the sealing composition.
29. The method of claim 8 wherein at least one of said first and second sealing compositions further comprises a foaming agent.
30. The method of claim 29 wherein the foaming agent is present in a range of 2% to 4% by weight of the latex in the sealing composition.
31. The method of claim 11 wherein at least one of said first and second sealing compositions is foamed using nitrogen or air.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/006,109 | 2001-12-04 | ||
| US10/006,109 US6668928B2 (en) | 2001-12-04 | 2001-12-04 | Resilient cement |
| US10/243,001 US7040404B2 (en) | 2001-12-04 | 2002-09-13 | Methods and compositions for sealing an expandable tubular in a wellbore |
| US10/243,001 | 2002-09-13 | ||
| PCT/GB2002/005416 WO2003048514A1 (en) | 2001-12-04 | 2002-11-29 | Methods and compositions for sealing an expandable tubular in a wellbore |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2468936A1 CA2468936A1 (en) | 2003-06-12 |
| CA2468936C true CA2468936C (en) | 2008-06-10 |
Family
ID=26675205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002468936A Expired - Fee Related CA2468936C (en) | 2001-12-04 | 2002-11-29 | Methods and compositions for sealing an expandable tubular in a wellbore |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US7040404B2 (en) |
| EP (1) | EP1451442B1 (en) |
| AU (1) | AU2002365712B2 (en) |
| CA (1) | CA2468936C (en) |
| MX (1) | MXPA04005435A (en) |
| WO (1) | WO2003048514A1 (en) |
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- 2002-11-29 AU AU2002365712A patent/AU2002365712B2/en not_active Ceased
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| AU2002365712B8 (en) | 2003-06-17 |
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| CA2468936A1 (en) | 2003-06-12 |
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| EP1451442A1 (en) | 2004-09-01 |
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