CA2677254A1 - Swellable packer with enhanced sealing capability - Google Patents

Swellable packer with enhanced sealing capability Download PDF

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Publication number
CA2677254A1
CA2677254A1 CA002677254A CA2677254A CA2677254A1 CA 2677254 A1 CA2677254 A1 CA 2677254A1 CA 002677254 A CA002677254 A CA 002677254A CA 2677254 A CA2677254 A CA 2677254A CA 2677254 A1 CA2677254 A1 CA 2677254A1
Authority
CA
Canada
Prior art keywords
seal elements
seal
packer assembly
base pipe
adjacent
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.)
Granted
Application number
CA002677254A
Other languages
French (fr)
Other versions
CA2677254C (en
Inventor
Christopher J. Chalker
Kristian Solhaug
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Halliburton Energy Services Inc
Original Assignee
Halliburton Energy Services, Inc.
Christopher J. Chalker
Kristian Solhaug
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Halliburton Energy Services, Inc., Christopher J. Chalker, Kristian Solhaug filed Critical Halliburton Energy Services, Inc.
Priority to CA2765193A priority Critical patent/CA2765193C/en
Publication of CA2677254A1 publication Critical patent/CA2677254A1/en
Application granted granted Critical
Publication of CA2677254C publication Critical patent/CA2677254C/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • E21B33/12—Packers; Plugs
    • E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining

Abstract

A swellable packer with enhanced sealing capability. A packer assembly includes multiple seal elements, each seal element being swellable downhole, each seal element having at least one face inclined relative to a longitudinal axis of the assembly, and the inclined faces of adjacent seal elements contacting each other. A method of constructing a packer assembly having a desired differential pressure sealing capability includes: providing a base pipe and multiple seal elements, each seal element being swellable in a downhole environment, and each seal element having a predetermined differential pressure sealing capability less than the desired sealing capability; and after the desired sealing capability is determined, installing a selected number of the seal elements on the base pipe, so that the combined predetermined differential pressure sealing capabilities of the installed seal elements is at least as great as the desired sealing capability.

Claims (31)

1. A packer assembly, comprising:

multiple seal elements, each seal element being swellable in a downhole environment, each seal element having at least one face inclined relative to a longitudinal axis of the packer assembly, and the inclined faces of adjacent seal elements contacting each other.
2. The packer assembly of claim 1, wherein the multiple seal elements are installed on a single base pipe.
3. The packer assembly of claim 2, wherein the seal elements slide onto the base pipe from an end thereof.
4. The packer assembly of claim 2, wherein at least one of the seal elements has a longitudinal slit therein which permits installation on the base pipe in a direction lateral to the longitudinal axis.
5. The packer assembly of claim 2, wherein at least one of the seal elements is wrapped helically about the base pipe.
6. The packer assembly of claim 1, wherein at least two support rings straddle the multiple seal elements.
7. The packer assembly of claim 6, wherein the seal elements are radially extendable into sealing contact with a well surface without decreasing a longitudinal distance between the support rings.
8. The packer assembly of claim 6, wherein at least one of the support rings includes a face inclined relative to the longitudinal axis, and wherein the support ring face is arranged to bias an adjacent one of the seal elements into sealing contact when the adjacent seal element swells downhole.
9. The packer assembly of claim 6, wherein at least one of the support rings includes a surface which is radially offset relative to a surface of an adjacent one of the seal elements, and wherein the support ring surface is arranged to bias the adjacent seal element into sealing contact when the adjacent seal element swells downhole.
10. The packer assembly of claim 9, wherein the support ring surface is parallel to the adjacent seal element surface.
11. The packer assembly of claim 1, wherein the seal elements are radially extendable into sealing contact with a well surface without longitudinally compressing the seal elements.
12. The packer assembly of claim 1, wherein the seal elements include first seal elements straddling a second seal element, and wherein the second seal element is less rigid than the first seal elements.
13. The packer assembly of claim 12, wherein at least one of the first seal elements includes a reinforcement material in a seal material.
14. The packer assembly of claim 13, wherein the seal material is a swellable seal material.
15. The packer assembly of claim 1, wherein the seal elements have corresponding varied levels of rigidity in a direction parallel to the longitudinal axis.
16. A method of constructing a packer assembly having a desired differential pressure sealing capability, the method comprising the steps of:

providing a base pipe;

providing multiple seal elements, each seal element being swellable in a downhole environment, and each seal element having a predetermined differential pressure sealing capability less than the desired differential pressure sealing capability of the packer assembly; and after the desired differential pressure sealing capability of the packer assembly is determined, installing a selected number of the seal elements on the base pipe, so that the combined predetermined differential pressure sealing capabilities of the installed seal elements is at least as great as the desired differential pressure sealing capability of the packer assembly.
17. The method of claim 16, wherein the installing step further comprises contacting faces of adjacent seal elements with each other.
18. The method of claim 17, wherein the faces of the adjacent seal elements are inclined relative to a longitudinal axis of the base pipe.
19. The method of claim 16, further comprising the step of swelling the seal elements downhole, so that the seal elements sealingly contact a well surface.
20. The method of claim 19, wherein the seal elements sealingly contact the well surface without longitudinally compressing the seal elements.
21. The method of claim 16, wherein the seal elements providing step further comprises providing first seal elements having greater rigidity than at least one second seal element.
22. The method of claim 21, wherein the installing step further comprises positioning the first seal elements straddling the second seal element.
23. The method of claim 16, wherein the installing step further comprises varying a rigidity of the seal elements in a direction parallel to a longitudinal axis of the base pipe.
24. The method of claim 16, wherein the installing step further comprises positioning support rings straddling the seal elements on the base pipe.
25. The method of claim 24, wherein at least one of the support rings includes a face inclined relative to a longitudinal axis of the base pipe, and further comprising the step of the support ring face biasing an adjacent one of the seal elements into sealing contact with a well surface when the adjacent seal element swells downhole.
26. The method of claim 24, wherein at least one of the support rings includes a surface which is radially offset relative to a surface of an adjacent one of the seal elements, and further comprising the step of the support ring surface biasing the adjacent seal element into sealing contact with a well surface when the adjacent seal element swells downhole.
27. The method of claim 26, wherein the support ring surface is parallel to the adjacent seal element surface.
28. The method of claim 24, further comprising the step of swelling the seal elements downhole, so that the seal elements sealingly contact a well surface, without decreasing a longitudinal distance between the support rings.
29. The method of claim 16, wherein the installing step further comprises sliding the seal elements onto the base pipe from an end thereof.
30. The method of claim 16, wherein the installing step further comprises installing at least one of the seal elements on the base pipe in a direction lateral to a longitudinal axis of the base pipe.
31. The method of claim 16, wherein the installing step further comprises wrapping at least one of the seal elements helically about the base pipe.
CA2677254A 2007-02-06 2007-02-06 Swellable packer with enhanced sealing capability Active CA2677254C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA2765193A CA2765193C (en) 2007-02-06 2007-02-06 Swellable packer with enhanced sealing capability

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2007/061703 WO2008097312A1 (en) 2007-02-06 2007-02-06 Swellable packer with enhanced sealing capability

Related Child Applications (1)

Application Number Title Priority Date Filing Date
CA2765193A Division CA2765193C (en) 2007-02-06 2007-02-06 Swellable packer with enhanced sealing capability

Publications (2)

Publication Number Publication Date
CA2677254A1 true CA2677254A1 (en) 2008-08-14
CA2677254C CA2677254C (en) 2012-04-10

Family

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Family Applications (2)

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CA2765193A Active CA2765193C (en) 2007-02-06 2007-02-06 Swellable packer with enhanced sealing capability
CA2677254A Active CA2677254C (en) 2007-02-06 2007-02-06 Swellable packer with enhanced sealing capability

Family Applications Before (1)

Application Number Title Priority Date Filing Date
CA2765193A Active CA2765193C (en) 2007-02-06 2007-02-06 Swellable packer with enhanced sealing capability

Country Status (9)

Country Link
US (2) US9303483B2 (en)
EP (1) EP2129865B1 (en)
AU (1) AU2007346700B2 (en)
BR (1) BRPI0721215B1 (en)
CA (2) CA2765193C (en)
DK (1) DK2129865T3 (en)
MX (1) MX2009008348A (en)
NO (1) NO342926B1 (en)
WO (1) WO2008097312A1 (en)

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US20080185158A1 (en) 2008-08-07
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US9488029B2 (en) 2016-11-08
US20120067565A1 (en) 2012-03-22
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BRPI0721215A2 (en) 2013-01-01
US9303483B2 (en) 2016-04-05

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