US20080128173A1 - Drill Cuttings Transfer System and Related Methods - Google Patents
Drill Cuttings Transfer System and Related Methods Download PDFInfo
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- US20080128173A1 US20080128173A1 US11/697,084 US69708407A US2008128173A1 US 20080128173 A1 US20080128173 A1 US 20080128173A1 US 69708407 A US69708407 A US 69708407A US 2008128173 A1 US2008128173 A1 US 2008128173A1
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- cuttings
- tank
- flow
- conveyance member
- lower portion
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- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/01—Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes
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- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
- E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
- E21B21/065—Separating solids from drilling fluids
Abstract
A system for handling drill cuttings conveys cuttings into bulk tanks via a conduit. The bulk tanks have a lower portion that converges to an elongated opening. A conveyance member positioned at the elongated opening forces the cuttings out of a discharge port at the bottom of the bulk tank. Once suitable conveyance member is a screw-type conveyor coupled to a motor that applies a motive force to the cuttings. The bulk tank lower portion can be formed as a wedge or trough that generally conforms to the configuration of the conveyance member. The bulk tanks hold the cuttings until it can be discharged via the discharge port to a transport vessel for processing or disposal. For offshore operations, the system includes a separation unit on the rig that forms the cuttings from fluid returning from the wellbore and a cuttings flow unit that conveys the cuttings from the separation unit to the bulk tanks.
Description
- This application takes priority from U.S. Provisional Patent Application Ser. No. 60/789,395, filed Apr. 5, 2006.
- 1. Field of the Disclosure
- This disclosure relates generally to handling of waste materials, especially particulate drill solids.
- 2. Description of the Related Art
- In the drilling of oil and gas wells, drilling fluids or “muds” are used to provide well bore lubrication, to cool the drill bit, to protect against corrosion and to provide a pressure head to maintain formation integrity. There are two main types of drilling muds: water-based and oil-based. Generally, surface pumps circulate drilling mud down the tubular drill string. The mud exits at the drill bit and flows up the annulus between the drill string and the bore. The returning fluid (or return fluid) carries the drill cuttings away from the bit and out of the wellbore. Oil-based drilling muds are stable oil external-water internal emulsions including wetting agents to hold solids such as drill cuttings in the oil phase. The drill cuttings thus tend to become oil wet, trapping large quantities of oil-based mud in their intergranular spaces and creating environmental concerns regarding disposal of the oil-contaminated drill cuttings.
- In the prior art, drill cuttings contaminated with oil-based drilling muds were often collected in settling tanks where re-usable drilling mud was drawn off the top of the tank and contaminated drill cuttings, as bottoms, were transported to appropriate disposal sites. Such storage and transportation operations are costly and environmentally undesirable especially in offshore drilling operations. Typically, oil-contaminated cuttings contain about fifty percent (50%) by volume of oil-based liquid. The value of this large volume of entrained oily liquids is considerable, and there is a strong incentive to recover the oil-based drilling mud both for economic as well as environmental reasons.
- Accordingly, the cuttings are commonly separated from the drilling fluid by devices such as shale shakers, which remove cuttings and large solids from the drilling fluid during the circulation thereof. Basically, such a device has a sloping, close mesh screen over which fluid returning from the hole being drilled passes. The solids captured on the screen travel down the sloping surface to be collected in the shaker ditch or cuttings trough. It is also desirable to recover as much of the expensive drilling fluids as possible. Therefore, other devices, which play a role in the separation of solids from drilling fluids, include cyclone separators and centrifuges. The cuttings discharged from the shakers, cyclones and centrifuges that are collected in the shaker ditch or cuttings trough are still highly contaminated with the drilling fluids and therefore form a slurry or heavy sludge. Typically the slurry is conveyed into containers or skips, which are then periodically moved by crane from the rig onto a vessel.
- This process is disadvantageous for a number of reasons. First, the skips take up considerable valuable space on the rig floor. Moreover, the handling of the skips requires the use of the rig crane, which may divert the crane from other important duties. One prior art device uses a pneumatic conveyance arrangement to convey materials out of a bulk tank that has a conical hopper section. It is believed that one drawback of such an arrangement is that using pressurized air as a sole means for discharging cuttings may not adequately evacuate the bulk tank of cuttings. It is believed that another drawback is that the circular opening of the conical hopper section could get plugged with cuttings.
- The present disclosure addresses these and other drawbacks of the prior art.
- In aspects, the present disclosure provides efficient systems and methods for processing, storing and transporting drill cuttings that are generated while drilling hydrocarbon-producing wellbores. These cuttings as noted earlier are entrained in a drilling fluid returning from the wellbore (return fluid). After the return fluid is separated to form a slurry of cuttings, the cuttings are conveyed into one or more bulk tanks via conduits such as hoses, pipes or tubing. The bulk tank has a lower portion that converges to an elongated opening at which a cuttings conveyance member is positioned. To discharge cuttings, the cuttings conveyance member, when energized, applies a motive force that causes the cuttings to flow out of a bulk tank discharge port to a transfer line. As the cuttings flow out of the bottom of the tank, gravity pulls more cuttings into the cuttings conveyance member. The cuttings conveyance member may be operated in a first mode to flow cuttings and a second mode to mix cuttings. One suitable cuttings conveyance member includes a rotating screw-type conveyor or auger coupled to a motor.
- In one embodiment, the lower portion of the bulk tank has a wedge or trough shape that feeds cuttings to the cuttings conveyance member. In contrast to a conical shaped lower portion that is defined by a single inclined wall that converges to a circular exit opening, the wedge shaped lower portion is defined by at least two walls that converge to an elongated slot-like exit opening. Advantageously, due to its relatively large size, the elongated slot-like exit opening is less susceptible to plugging during discharge operations. Additionally, the elongated slot-like exit opening can be configured to conform with a horizontally aligned cuttings conveyance member such that cuttings are evenly fed into the cuttings conveyance member.
- To further assist the discharge of cuttings out of the bulk tank, pressurized air can be fed into one or more locations in the bulk tank. One function for this pressurized air is to balance the pressure between the bulk tank and devices connected to the bulk tank. In some arrangements, the cuttings conveyance member feeds cuttings into a transfer line in communication with a pneumatic flow device. The pneumatic flow device uses high pressure air to propel cuttings along the transfer line. To prevent back flow of cuttings into the tank, it may be desirable to balance the pressure inside the tank with the pressure at the pneumatic flow device. Thus, in one aspect, pressurized air is fed into the bulk tank at a pressure value that compensates for increased pressures generated by the pneumatic flow device. In another aspect, pressurized air can be used to fluidize the cuttings in the bulk tank. For example, when the cuttings have been kept in the bulk tank for an extended time, the weight of the cuttings can force liquids to flow out of the cuttings at the bottom of the tank. Thus, a form of stratification occurs wherein a relatively dense cuttings layer forms along the interior surfaces of the lower portion of the bulk tank. This dense cuttings layer can slow or even choke off the flow of cuttings out of the bulk tank. To break up or reduce the viscosity of this relatively dense cuttings layer, pressurized gas such as air can be introduced at one or more points near the lower portion of the bulk tank. The inflowing gas penetrates this relatively dense cuttings layer and reduces its density and/or physically displaces this layer. In one arrangement, a first pressurized gas line at a top of the tank pressure balances the tank and a second pressurized gas line fluidizes the relatively dense cuttings layer. In another arrangement, the pressurized gas line for fluidizing the relatively dense cuttings layer provides gas at a pressure value that also pressure balances the bulk tank.
- In one arrangement suited for offshore operations, the system includes a separation unit on the rig that forms the slurry of cuttings. The separation unit can include one or more shakers, centrifuge-type separators and/or other suitable devices. A cuttings flow unit conveys the cuttings from the separation unit to the bulk tanks or other selected location. The cuttings flow unit can include, for example, an auger type conveyor and pump or blower device to flow the cuttings and one or more diverter valves that can direct the cuttings flow as needed. In one arrangement, a controller controls the flow of cuttings into the plurality of bulk tanks. Sensors positioned on each of the bulk tanks produce signals indicative of the volume of cuttings in an associated bulk tank. The controller controls the flow of cuttings in response to the sensor signals. The bulk tanks can be filled simultaneously, sequentially or by any other scheme. The bulk tanks can hold the cuttings until it can be discharged to a transport vessel or vehicle for processing and/or disposal. The transport vessel or vehicle can have a bank of containers adapted to receive the cuttings from the bulk tanks.
- Examples of the more important features of the disclosure have been summarized (albeit rather broadly) in order that the detailed description thereof that follows may be better understood and in order that the contributions they represent to the art may be appreciated. There are, of course, additional features of the disclosure that will be described hereinafter and which will form the subject of the claims appended hereto.
- For detailed understanding of the present disclosure, reference should be made to the following detailed description of the preferred embodiment, taken in conjunction with the accompanying drawing:
-
FIG. 1 schematically illustrates a system for processing, storing and offloading drill cuttings made in accordance with one embodiment of the present disclosure; -
FIG. 2A schematically illustrates a side view of a bulk tank in accordance with one embodiment of the present disclosure; -
FIG. 2 b schematically illustrates an end view of a bulk tank in accordance with one embodiment of the present disclosure; -
FIG. 3 schematically illustrates an wedge shaped lower section of a bulk tank made in accordance with one embodiment of the present disclosure; -
FIG. 4 schematically illustrates a bulk tank and pressurized air supply system in accordance with one embodiment of the present disclosure; and -
FIG. 5 schematically illustrates a bulk tank in accordance with one embodiment of the present disclosure used in an offshore drilling environment. - The present disclosure relates to devices and methods for processing, storing and transporting a slurry of drill cuttings. The present disclosure is susceptible to embodiments of different forms. There are shown in the drawings, and herein will be described in detail, specific embodiments of the present disclosure with the understanding that the present disclosure is to be considered an exemplification of the principles of the disclosure, and is not intended to limit the disclosure to that illustrated and described herein. Further, none of the described elements or combination of elements should be considered essential features of the present teachings unless the description expressly describes the element or combination of elements as essential.
- As shown in
FIG. 1 , in one embodiment particularly suited for use on an offshore drilling rig, acuttings handling system 10 may include aseparation unit 12, cuttings flowunits more bulk tanks 16. The system offloads the cuttings to one or moresuitable containers 18 on a transport vessel (not shown). In one mode of operation, the system receives return fluid, which has entrained cuttings, from a wellbore being drilled. Theseparations unit 12 separates some of the drilling fluid from the return fluid for re-use in further drilling and also forms a slurry of cuttings. The cuttings flowunit 14 conveys the cuttings via aconduit 20 to the bank ofbulk tanks 16. After thebulk tanks 16 are filled with cuttings, a mechanically driven and gravity assisted conveyance member discharges the cuttings from thebulk tanks 16. The cuttings flowunit 15 propels the discharged cuttings via atransfer line 22 to the container(s) 18 or bulk tanks of the transport vessel (not shown). Thus, in contrast to conventional cuttings handling arrangements, less human intervention is needed to collect, store and move drill cuttings on a rig. The elements making up theFIG. 1 embodiment are discussed in further detail below. - The
separations unit 12 extracts the relatively expensive drilling fluid from the return fluid. In one arrangement, theseparations unit 12 can include one ormore shale shakers 21. Within theshale shaker 21, the return fluid and entrained solids are discharged over a vibratory separator that has one or a series of tiered screens. The screens catch and remove solids from the return fluid flowing therethrough. Theseparations unit 12 can also include other separation devices, such as acentrifugal separator 22, that are also configured to extract drilling fluid from the cuttings. Such separation devices and techniques are known in the art and will not be discussed in further detail. The effluent or output of theseparations unit 12 is a relatively viscous slurry made up of oil or additive-covered rock, earth and debris. The terms cuttings and slurry will be used interchangeably. - The cuttings flow
unit 14 transports the cuttings from theseparations unit 12 to other devices such as thebulk tanks 16 or another location such as thevessel storage tanks 18. In one embodiment, the cuttings flowunit 14 includes an auger-type device that continually conveys the cuttings to adense phase blower 24 that impels the cuttings through aconduit 20 such as piping or hoses. Suitable valves such as a diverter valve can be used in theconduit 20 to selectively direct flow of the cuttings. - Referring now to FIGS. 1 and 2A-B, the
bulk tanks 16 receive and store the flow of cuttings from theconduit 20. Thetanks 16 have an uppercylindrical portion 26 and alower portion 28 that converges to anelongated opening 29. In a manner described in further detail below, thelower portion 28 promotes mass flow of cuttings through thetank 16. Positioned at a bottom end of thelower portion 28 is aconveyance member 32 that applies a motive force that impels the cuttings out of thebulk tanks 16. Pressurized gas, such as air, from asource 34 is fed into one or more locations in thebulk tank 16 to maintain a pressure balance in thesystem 10 and/or to fluidize the cuttings in thebulk tank 16. - The filling of the
bulk tanks 16 can be controlled manually, automatically or a combination thereof. In one arrangement, acontroller 35 receives signals fromsensors 36 positioned on thebulk tanks 16. The sensor signals indicate the amount of cuttings in thebulk tanks 16. Thus, in one arrangement, acontroller 35 can have a programmable logic circuit (PLC) that directs flow into abulk tank 16 until the associatedsensor 36 indicates that thebulk tank 16 is full. Thereafter, the PLC stops flow to thebulk tank 16 by actuating appropriate valves and initiates flow into thenext bulk tank 16. This process can continue until all of thebulk tanks 16 are filled. While a sequential filling process has been described, it should be appreciated that two ormore bulk tanks 16 can be filled at the same time. While in some embodiments, the tank can be constructed to hold 100 BBL of drill cuttings having a specific gravity of 2.34, other sizes and configurations can also be used. - As explained earlier, the slurry of cuttings can be relatively viscous and not flow effectively under the effect of only gravity. Therefore, the
conveyance member 32 forcibly impels the cuttings out of thebulk tanks 16. In one embodiment, theconveyance member 32 is a rotating screw conveyor driven by amotor drive 33. A screw flight portion extends horizontally along a long axis of the wedge shapedportion 28. Rotation of the screw propels the cuttings to thetransfer line 22 and the cuttings flowunit 15. In some arrangements, theconveyance member 32 is right and left hand reversible. In the right hand rotation mode, the cuttings flow downward to aport 36. In the left hand rotation mode, the cuttings are mixed to maintain material consistency. This is advantageous when the cuttings are stored for long periods of time, since heavier material will settle to the tank bottom and lighter fluids will flow to the top. This stratification of materials can make it difficult to empty the tank of the cuttings. In such circumstances, the left hand rotation will mix the cuttings and enable the cuttings to flow out of the tank. In still other embodiments, two or more conveyance members can cooperate to expel the cuttings out of thebulk tank 16. A screw or auger is merely one illustrative member suitable for applying a motive force throughout the body of the cuttings. It should be appreciated that theconveyance member 32 positioned within the bulk tank is susceptible to numerous variations that can adequately apply a motive force to expel the cuttings out of thebulk tank 16. For example, suitable conveyance mechanisms include pneumatic systems, progressive cavity pumps, and vacuum pumping systems. - Referring now to
FIGS. 2A-B and 3, thelower portion 28 cooperates with theconveyance member 32 to discharge flow out of thetank 16. In one embodiment, thelower portion 28 has a wedge, chisel or trough shape that is generally defined by two sets ofwalls walls angle angles walls opening 29 that is longitudinally aligned with theconveyance member 32. As should be appreciated, in contrast to a conical shaped section that converges to a circular opening, theopening 29 presents a relatively large elongated slot-like cross-sectional flow area through which the cuttings can flow. Thus, there is a reduced risk that cuttings can occlude or plug theopening 29. Furthermore, it should also be appreciated that the wedge shapedportion 28 andelongated opening 29 can evenly distribute cuttings across a relatively large portion of theconveyance member 32. Other elongated or non-conical shapes can also be used in certain applications. - In an exemplary operating mode for discharging cuttings, gravity pulls the cuttings into the
conveyance member 32, which then conveys the cuttings out of thetank 16. As the cuttings exit thetank 16, additional cuttings fall into theconveyance member 32. Advantageously, the wedge shapedportion 28 cause a mass flow of cuttings that substantially uniformly loads theconveyance member 32 during this process. Thus, in one aspect, thesystem 10 discharges cuttings out of thetank 16 using a mechanically driven and gravity assisted arrangement. - To support the cutting discharge operation, there is shown in
FIG. 4 asource 60 that provides pressurized gas such as air for pressure balancing thetank 16 and/or fluidizing the cuttings in thetank 16. In one embodiment,ports source 60 viasuitable conduits 64 introduce pressurized gas at one or more points along thebulk tank 16. One or more of theports 62 a can be positioned to break up or reduce the viscosity of settled cuttings that layer the interior surfaces of the lower wedge shapedportion 28. The gas flowing throughsuch ports 62 a penetrates this relatively dense cuttings layer and reduces its overall density. That is, the gas intermixes with or “fluffs” the cuttings layer. The inflowing gas can also physically displace or dislodge portions of this layer from the interior surfaces of thetank 16. One ormore ports 62 b can also be positioned at or near a top of thetank 16 to provide pressure balancing gas. In theFIG. 4 embodiment, thesource 60 operates as the cuttings flow unit 15 (FIG. 1 ) by supplying high pressure gas to propel cuttings through thetransfer line 22. For example, thesource 60 can supply a continuous flow of high pressure air into thetransfer line 22 at the same time the conveyance member 32 (FIG. 2A ) feeds cuttings into thetransfer line 22. Because thesource 60 and thebulk tanks 16 are in fluid communication via thetransfer line 22, the high pressure gas in thetransfer line 22 can apply a back pressure at thetank 16. This applied back pressure can restrict the flow of cuttings out of thetank 16. To compensate for the operating pressure generated by thesource 60, pressurized gas fed through theports 62 b increases the pressure in thetank 16 to at least partially offset this applied back pressure. Of course, in certain embodiments, the pressurized gas flowing throughports 62 a can both fluidize the relatively dense cuttings layer and provide gas at a pressure value that also pressure balances the bulk tank. - A number of instruments and device can be utilized to control the flow of pressurized gas. For example,
valves 70 for selectively feeding gas into theports solenoid 64 control unit can also be used to control avalve 74 feeding pressurized air into thetransfer line 22. Additionally,suitable gauges 76 such as pressure gauges and level gages can be positioned as desired on thetank 16. In many applications, the pressurized gas can be air, but other gases such as nitrogen can be used. - Referring now to
FIG. 5 , there is shown an embodiment of the present disclosure that is suited for offshore drilling applications. As is known, platform, floater, jack up or work over drilling operations utilize a surface facility such as anoffshore rig 70 from which adrilling riser 72 or other device conveys adrill string 74 into a subsurface well (not shown). Positioned on theoffshore rig 70 iscuttings handling system 71 that processes the return fluid from the subsurface wellbore (not shown) using equipment previously discussed and conveys the cuttings to a bank ofbulk tanks 76. During drilling, the return fluid is processed and the cuttings continuously conveyed and stored in thebulk tanks 76. A controller fills thebulk tanks 76 using preprogrammed instructions and signals from suitably positioned sensors. Periodically, atransport vessel 78 such as a barge is moored adjacent to therig 70 andstorage tanks 80 in thebarge 78 are connected to thecuttings handling system 71. Thereafter, high pressure gas is fed into thebulk tanks 76 to fluidize the cuttings and balance the pressure in thebulk tanks 76. Once the conveyance device 32 (FIG. 2A ) is energized, cuttings flow out of thebulk tanks 76 and to thebarge 78. - It should be appreciated that the cuttings handling systems described above offer enhanced safety due to the reduced number of handling operations such as interventions by personnel to hook up containers to the crane, manual shoveling of cuttings into containers, transfers of containers around the rig floor, use of the crane rig, etc. Furthermore, the transport vessel to which the cuttings is offloaded is only temporarily moored adjacent the rig. A continuously moored transport vessel could pose a hazard to the rig and itself during rough seas. Thus, reducing the time the transport vessel is moored to the rig also reduces the risk that inclement weather will interfere with drilling operations.
- While the foregoing disclosure is directed to the preferred embodiments of the disclosure, various modifications will be apparent to those skilled in the art. It is intended that all variations within the scope of the appended claims be embraced by the foregoing disclosure.
Claims (20)
1. A system for handling a return fluid formed of drilling fluid and entrained cuttings recovered while drilling a wellbore in an earthen formation, comprising:
(a) a separation unit at least partially separating the drilling fluid from the return fluid, a slurry of cuttings thereby being formed;
(b) a cuttings flow unit receiving the cuttings from the separation unit, the cutting flow unit conveying the cuttings through a conduit coupled thereto;
(c) at least one tank coupled to the conduit, the tank having a lower portion converging to an elongated opening; and
(d) a conveyance member positioned adjacent to the elongated opening receiving the cuttings from the lower portion and flowing the cuttings out of the at least one bulk tank.
2. The system of claim 1 , further comprising a flow device receiving the flow of cuttings from the conveyance member and conveying the cuttings to a selected location.
3. The system of claim 2 , further comprising a gas source providing a pressurized gas to the at least one tank to at least partially offset a pressure increase associated with operation of the cuttings flow device.
4. The system of claim 1 , further comprising a gas source providing a gas to the at least one tank to fluidize at least a portion of the cuttings in the at least one tank.
5. The system of claim 1 , wherein the lower portion is wedge shaped and wherein the conveyance member includes an auger longitudinally aligned with the elongated opening.
6. The system of claim 1 , wherein the at least one tank includes a cylindrical upper portion, the cuttings flowing from the upper portion to the lower portion.
7. The system of claim 1 wherein the conveyance member operates in a first mode to flow the cuttings and a second mode to mix the cuttings.
8. A method for handling a return fluid formed of drilling fluid and entrained cuttings recovered while drilling a wellbore in an earthen formation, comprising:
(a) separating the drilling fluid from the return fluid to form a slurry of cuttings with a separation unit;
(b) conveying the cuttings through a conduit coupled to the separation unit using a cuttings flow unit;
(c) receiving the cuttings into at least one tank coupled to the conduit, the bulk tank having a lower portion converging to an elongated opening; and
(d) flowing the cuttings out of the at least one tank using a conveyance member positioned adjacent to the elongated opening.
9. The method of claim 8 , further comprising conveying the cuttings to a selected location using a flow device that receives the flow of cuttings from the conveyance member.
10. The method of claim 9 , further at least partially offsetting a pressure increase associated with operation of the flow device using a gas source that provides a pressurized gas to the at least one tank.
11. The method of claim 8 , further comprising fluidizing at least a portion of the cuttings in the at least one tank using a gas source that provides a gas to the at least one tank.
12. The method of claim 8 , wherein the lower portion is wedge shaped and wherein the conveyance member includes an auger longitudinally aligned with the elongated opening.
13. The method of claim 8 , wherein the at least one tank includes a cylindrical upper portion, the cuttings flowing from the cylindrical upper portion to the lower portion.
14. The method of claim 8 further comprising operating the conveyance member in a first mode to flow the cuttings and a second mode to mix the cuttings.
15. A system for handling cuttings separated from a return fluid formed of drilling fluid and entrained cuttings, comprising:
(a) a tank for receiving the cuttings, the tank having a cylindrical upper portion and a wedge shaped lower portion converging to an elongated opening; and
(b) a conveyance member positioned adjacent to the elongated opening receiving the cuttings from the wedge shaped lower portion and flowing the cuttings out of the tank.
16. The system of claim 15 , further comprising a flow device receiving the flow of cuttings from the conveyance member and conveying the cuttings to a selected location.
17. The system of claim 16 , further comprising a gas source providing a pressurized gas to the tank to at least partially offset a pressure increase associated with operation of the cuttings flow device.
18. The system of claim 15 , further comprising a gas source providing a gas to the tank to fluidize at least a portion of the cuttings in the tank.
19. The system of claim 15 wherein the conveyance member operates in a first mode to flow the cuttings and a second mode to mix the cuttings.
20. The system of claim 15 wherein the lower portion is defined by a first set of walls and a second set of walls, each of the walls of the first and second set of walls having an angle selected to cause mass flow of the cuttings.
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US11/697,084 US20080128173A1 (en) | 2006-04-05 | 2007-04-05 | Drill Cuttings Transfer System and Related Methods |
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US78939506P | 2006-04-05 | 2006-04-05 | |
US11/697,084 US20080128173A1 (en) | 2006-04-05 | 2007-04-05 | Drill Cuttings Transfer System and Related Methods |
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AU (1) | AU2007234766A1 (en) |
BR (1) | BRPI0709999A2 (en) |
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US20110052353A1 (en) * | 2009-08-27 | 2011-03-03 | Charles Franklin Spenser | Apparatus and method for collecting and transporting oil well drill cuttings |
US20140014214A1 (en) * | 2009-09-25 | 2014-01-16 | Jan Thore Eia | Multiple Process Service Vessel |
US11125031B2 (en) * | 2019-07-19 | 2021-09-21 | Milestone Environmental Services, Llc | Receiving pit and trench for a drilling fluid disposal system |
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-
2007
- 2007-04-05 WO PCT/US2007/066077 patent/WO2007118155A2/en active Application Filing
- 2007-04-05 GB GB0817876A patent/GB2450047A/en not_active Withdrawn
- 2007-04-05 AU AU2007234766A patent/AU2007234766A1/en not_active Abandoned
- 2007-04-05 US US11/697,084 patent/US20080128173A1/en not_active Abandoned
- 2007-04-05 BR BRPI0709999-1A patent/BRPI0709999A2/en not_active IP Right Cessation
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2008
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110052353A1 (en) * | 2009-08-27 | 2011-03-03 | Charles Franklin Spenser | Apparatus and method for collecting and transporting oil well drill cuttings |
US20140014214A1 (en) * | 2009-09-25 | 2014-01-16 | Jan Thore Eia | Multiple Process Service Vessel |
US11125031B2 (en) * | 2019-07-19 | 2021-09-21 | Milestone Environmental Services, Llc | Receiving pit and trench for a drilling fluid disposal system |
Also Published As
Publication number | Publication date |
---|---|
GB0817876D0 (en) | 2008-11-05 |
WO2007118155A2 (en) | 2007-10-18 |
WO2007118155A3 (en) | 2008-04-10 |
BRPI0709999A2 (en) | 2011-08-02 |
NO20084057L (en) | 2008-10-27 |
GB2450047A (en) | 2008-12-10 |
AU2007234766A1 (en) | 2007-10-18 |
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