WO2008073343A1 - Dispositif et procede de nettoyage de puits - Google Patents

Dispositif et procede de nettoyage de puits Download PDF

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Publication number
WO2008073343A1
WO2008073343A1 PCT/US2007/025165 US2007025165W WO2008073343A1 WO 2008073343 A1 WO2008073343 A1 WO 2008073343A1 US 2007025165 W US2007025165 W US 2007025165W WO 2008073343 A1 WO2008073343 A1 WO 2008073343A1
Authority
WO
WIPO (PCT)
Prior art keywords
fluid
swab cup
cup
pipeline
swab
Prior art date
Application number
PCT/US2007/025165
Other languages
English (en)
Other versions
WO2008073343A8 (fr
Inventor
Kirby Nicholson
Original Assignee
Wise Well Intervention Services, Inc.
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 Wise Well Intervention Services, Inc. filed Critical Wise Well Intervention Services, Inc.
Publication of WO2008073343A1 publication Critical patent/WO2008073343A1/fr
Publication of WO2008073343A8 publication Critical patent/WO2008073343A8/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B37/00—Methods or apparatus for cleaning boreholes or wells
    • E21B37/10—Well swabs

Definitions

  • the present invention relates generally to the field of oil and natural gas producing wells or pipelines and more particularly to the cleaning of such wells or pipelines to improve production therefrom.
  • Petroleum wells are often serviced by running tools into the wellbore to perform many different functions.
  • One function is the removal of liquids and/or solids that may be detrimental to production of the wells.
  • These liquids are often removed by one of two methods: a) Swabbing, where a tool is lowered into the wellbore on a cable and liquids are removed by a mandrel with rubber elements that allow fluids to pass on the way into the well but then seals and prevents them from falling back down the well while pulling out.
  • tubing continuous coil or jointed
  • a fluid often compressed air, nitrogen or pumped water
  • Wellbore fluids and/or solids are lifted to surface by the velocity and mixing of the circulation fluid.
  • Swabbing can be difficult when there are solids in the wellbore that may cause the swabbing mandrel to hang up and not fall down far enough into the well to recover the desired amount of wellbore fluids. These solids can also cause the mandrel to become stuck in the hole when the operator attempts to pull out of the well.
  • tubing and a circulation fluid may not be effective in removing wellbore fluids/solids in wells that have open perforations, open-hole completions, liners or other well casing openings that provide a place for the fluids (either pumped or already existing in the wellbore) to exit when head and friction pressures, required for the circulation to occur, exceed those required to push fluid out through any of the aforementioned openings in the well casing.
  • U.S. Patent No. 6,901,999 of Sugden teaches a conventional swabbing tool for lowering into a wellbore on a wire line with a sifter attached to the tool below a swab cup thereof to filter particulates from fluid flowing upward past the swab cup.
  • the swab cup is used to remove fluid from the wellbore with the sifter preventing the buildup of particulate matter above the swab cup that may otherwise obstruct withdrawal of the tool from the wellbore.
  • No circulation fluids are distributed into the well by the tool.
  • U.S. Patent No. 4,498,536 of Ross et al. teaches a tubular work string carrying a resettable packer and a circulating wash tool.
  • the wash tool injects fluid from the work string into the well casing perforations between vertically spaced sealing elements isolating the injection.
  • a swab test may be carried out by moving the wash tool upward and then running a separate swab tool down the work string bore on a wire line.
  • U.S. Patent No. 4,886,116 of Garrison teaches an apparatus for facilitating gas production in a flooded gas well by injecting gas downward through tubing and then redirecting it upward in a space between the tubing and a surrounding cylinder to create a jet-like thrust causing a pull on a production zone of the well.
  • a check valve may be provided at a bottom end of the apparatus to allow swabbing by a separate apparatus or production without removal of the apparatus.
  • a device for cleaning wells or pipelines comprising: a body comprising a conduit extending therethrough; first port on the body communicating an exterior thereof to the conduit and arranged for connection to a fluid conveying line; a second port on the body communicating an exterior of the body to the conduit and spaced from the first port; a swab cup disposed about the body; a passageway extending in a direction along the body;and a mechanism associated with the passageway and arranged to selectively allow or prevent fluid flow through the passageway between one side of the swab cup and an opposite side of the swab cup.
  • the device may be used to swab wells or pipelines and circulate fluid in them, either at the same time or separately but without needing to change the equipment used for either process.
  • the cleaning device is lowered into the well on a fluid conveying line such as continuous coiled tubing or jointed tubing that both supports the device and allows fluid circulation through the conduit thereof.
  • the swab cup is movable relative to the body to selectively allow or prevent fluid flow through the passageway between the one side and the opposite side of the swab.
  • the passageway is defined between the swab cup and a slide portion of the body, the swab cup being slidable along the slide portion to be selectively engaged about a stop portion of the body dimensioned to close the passageway.
  • the stop portion is tapered to increase in cross section away from the slide portion.
  • a stop collar protruding about the slide portion at an end thereof opposite the stop portion to block sliding of the swab cup while keeping the passageway partially unobstructed.
  • the swab cup is slidable along the body between a flow-allowing position between the first and second ports in which flow through the passageway between the one side and the opposite side of the swab cup is allowed and a flow-blocking position on a side of the second port opposite the first port in which flow through the passageway between the one side and the opposite side of the swab cup is prevented.
  • the first port opens to the exterior of the body at an end face thereof.
  • the second port opens to the exterior of the mandrel at a periphery thereof.
  • the second port comprises a plurality of circumferentially spaced ports spaced about a periphery of the mandrel.
  • the second port comprises a plurality of longitudinally spaced ports spaced apart along the body.
  • an additional port on the mandrel communicating an exterior thereof the body to the conduit, the additional port being adjacent a second end of the body opposite a first end of the body to which the first port is adjacent.
  • the additional port opens to the exterior of the body at the second end thereof.
  • a check valve associated with the additional port to prevent fluid flow from the exterior of the mandrel into the conduit.
  • a jetting nozzle associated with the additional port to spray fluid from the conduit to the exterior of the mandrel.
  • the device is a tool used to assist in the removal of liquids and/or solids from a well with a lower seal between the well casing and a ported swab mandrel formed by swab cups that ride on the ported swab mandrel.
  • the ported swab mandrel allows fluids to be circulated down the carrier tubing, through the center of the ported swab mandrel and out its ports, back up the carrier tubing/well-casing annulus.
  • the device can be used to swab fluids from a well using the swab cup or fluids can be circulated out of the well by pumping fluids down the continuous coil or jointed pipe upon which the invention is lowered into the well.
  • a method of cleaning a well comprising the steps of: fitting a cleaning tool to a fluid conveying line to communicate the fluid conveying line with a conduit defined by the cleaning tool; feeding the fluid conveying line down a wellbore to lower the cleaning tool theredown; delivering fluid down the wellbore along the fluid conveying line to transition between the conduit of the cleaning tool and an exterior of the cleaning tool; preventing flow of fluid from above a swab cup disposed about a body of the cleaning tool to below the swab cup through a passageway extending in a direction along the cleaning tool: and retracting the fluid conveying line up the wellbore with flow through the passageway from above the swab cup to below the swab cub prevented to carry fluids and deposits situated above the swab cup upward for removal form the wellbore.
  • the step of moving fluid upward relative to the cleaning tool may comprise moving fluid upward from below the swab cup to the height upward thereof.
  • the step of delivering fluid down the wellbore may comprise delivering fluid to a depth below the swab cup.
  • the fluid moved upward relative to the cleaning tool above the swab cup carries deposits upward above the swab cup.
  • the step of retracting the fluid conveying line may further comprise delivering fluid down the wellbore to free further deposits from the casing as the cleaning tool is lifted up the wellbore by the fluid conveying line.
  • the step of delivering fluid down the wellbore may be carried out during the step of feeding the fluid conveying line down a wellbore.
  • the step of moving fluid upward relative to the cleaning tool above the swab cup may be carried out during the step of feeding the fluid conveying line down a wellbore.
  • the step of delivering fluid down the wellbore may be carried out during the step of retracting the fluid conveying line up the wellbore.
  • Figure 1 is a perspective view of a well cleaning device having a plurality of slidable swab cups disposed in a flow-allowing position along a body of the device.
  • Figure 2 is a perspective view of the well cleaning device of Figure 1 having the plurality of slidable swab cups disposed in a flow-blocking position along the body of the device.
  • Figure 3 is a cross sectional view of a well cleaning device having a single slidable swab cup disposed in a flow-allowing position along a body of the device into which the swab cup is biased during lowering of the device into a wellbore.
  • Figure 4 is a cross sectional view of the well cleaning device of Figure 3 having the single slidable swab cup disposed in a flow-blocking position along the body of the device into which the swab cup is biased during lifting of the device out of a wellbore.
  • Figure 5 is a cross sectional view as taken along line 5 -5 of Figure 4.
  • Figure 1 shows a well cleaning device 10 featuring an elongate body having an upper end 12 and a lower end 14.
  • the body is made up of a hanger retainer 16 just below tile upper end 12 and a cylindrical mandrel 18 extending co-axially downward from the hanger retainer 16 to a bottom stopper 20 at the lower end 14.
  • a plurality of swab cups 22 are each disposed about the tool body such that the mandrel 18 passes through the opening of each cup.
  • a diameter of the opening of 15 each cup 22 is greater along the entire height of the cup than the outer diameter of the mandrel 18 so that the cup is slidable along the length of the mandrel 18 between the hanger retainer 16 and the bottom topper 20 and the cup 22 does not seal against the mandrel 18.
  • the upper end 12 of the tool body is adapted for connection to a fluid conveying line 24, which for example may be continuous coiled tubing or jointed tubing, in a suitable manner known to those of skill in the art for connecting down-hole tools to fluid conveying tubing.
  • a fluid conveying line 24 which for example may be continuous coiled tubing or jointed tubing, in a suitable manner known to those of skill in the art for connecting down-hole tools to fluid conveying tubing.
  • Each section of the tool body is hollow, with the sections being connected to communicate the interior of one section to that of the next, thereby defining a conduit extending fully from the upper end 12 to the lower end 14.
  • the round cylindrical mandrel 18 features a plurality of ports 26 extending radially from its hollow interior through to its exterior surface 30 to allow fluid flow therebetween.
  • the mandrel 18 may be cross-drilled to form the ports 26 in diametrically opposed pairs.
  • the ports 26 may be spaced along the mandrel 18 and may be spaced circumferentially thereabout.
  • the ports 26 allow fluid to be pumped down through the conveying line 24 into the conduit defined within the tool body and then outward therefrom to the surroundings.
  • the hanger retainer 16 is axially ported to form a respective portion of the conduit extending along its central longitudinal axis to communicate with the hollow interiors of the mandrel 18 and the conveying line 24.
  • the hanger retainer 16 is formed by a cylinder which would have a round outer periphery if not for rectangular slots or channels 32 cut into the periphery 34.
  • the slots 32 extend the full length of the hanger retainer 16 from an end thereof nearest the upper end 12 of the tool body to the opposite end of the hanger retainer 16 mated to the mandrel 18.
  • the diameter of the hanger retainer 16 at the unslotted portions thereof is greater than that of the opening in each swab cup 22 such that the swab cups 22 cannot slide upward along the mandrel 18 past the lower end of the hanger retainer.
  • the hanger retainer 16 thus protrudes outward from the mandrel 18 to act as a stop collar to limit sliding motion of the cups 22 along the mandrel.
  • the diameter of the hanger retainer 16 extending between the slots 32 is less than that of the opening in each swab cup 22 so that when a cup 22 is slid upward along the mandrel 18 to the hanger retainer 16, the space between the inner periphery of the cup and the exterior 30 of the mandrel defined by the different diameters thereof communicates with at least one of the slots 32.
  • the bottom cup stopper 20 disposed at the end of the mandrel 18 opposite the hanger retainer 16 has a frustoconical portion 36 extending from the end of the mandrel 18 outward to a cylindrical portion 38 of greater diameter than the mandrel 18.
  • the diameter of the cylindrical portion 38 is large enough to seal against the inner periphery of each swab cup 22 slid onto it past the end of the mandrel 18. In other words, when a cup 22 is slid downward along the mandrel 18 past the lower end thereof, it becomes engaged about the bottom stopper 20 to close the opening defined by its inner periphery.
  • Figures 3 and 4 illustrate the use of a cleaning device 100 similar to that of Figures 1 and 2 except that only a single swab cup 22 is disposed about the tool body.
  • the cleaning device is 'fitted to an end of a fluid conveying line 24 to communicate an interior thereof with the hollow interior 16A of the hanger retainer 16 forming a first portion of the conduit 42 extending the full length of the tool body, for example by mating the conveying line with a threaded end portion 44 of the hanger interior 16A at the upper end 12 of the tool body.
  • the fluid conveying line is then fed down a wellbore 46 to lower the cleaning tool as shown by arrow 47 in Figure 3.
  • the swab cup 22 is of similar diameter to a round wall surface 48 disposed about the tool, for example as defined by the casing of the wellbore. Frictional engagement between the wall surface 48 and the outer periphery 50 of the cup 22 during lowering of the conveying line 24 causes the cup 22 to slide upward along the mandrel 18 against the hanger retainer 16. A passageway 52 defined by the spacing between the exterior surface 30 of the mandrel 18 and the inner periphery 54 of the cup 22 is at least partially unobstructed due to the communication with the slots 32 of the hanger retainer 16. As a result, fluid from beneath the swab cup 22 is allowed to flow upward through the passageway 52 to above the cup during lowering of the tool down the wellbore 46.
  • fluid may be pumped down the wellbore through the fluid conveying line 24 into the conduit 42 of the cleaning tool during lowering thereof down the wellbore 46.
  • This fluid transitions from the conduit 42 to the exterior of the tool body between the exterior surface 30 of the mandrel 18 and the surrounding wall surface 48 through the ports 26, as indicated by arrows 58, for circulation back to the top of the well within the space between the conveying line 24 and the surrounding wall surface 48 for recovery by known methods used for other circulation systems.
  • the fluid also continues down the conduit 42 into the hollow interior 2OA of the bottom stopper 20 for additional discharge to the exterior of the tool, as shown by arrow 59 in Figure 3, through additional port 60 at the lower end 14 thereof, which may be threaded as shown in Figure 3 or otherwise arranged to connect to a jetting nozzle and a check valve, as generally indicated at 62 in Figures 1 and 2.
  • the jetting of the fluid through the ports toward the wall surface 48 and the upward flow of the fluids therealong during recirculation acts to remove liquids and solids detrimental to production as in prior art circulation systems. With passageway 52 kept open during lowering of the cleaning device, circulation is facilitated by the allowance of upward fluid flow outside the tool body.
  • the cleaning device is automatically converted into a swabbing mode when it is pulled back up the wellbore 46, as indicated by arrow 64 in Figure 4, by retraction of the fluid conveying line 24. Frictional engagement of the outer periphery 50 of the swab cup 22 with the surrounding wall surface 48 causes the cup to slide downward along the mandrel 18 and engage around the bottom stopper 20.
  • the device in Figures 1 and 2 features three rectangular slots or channels 32 cut into the periphery 34 of the hanger retainer 16 spaced 120 degrees, center to center, from one another around the circumference, while the device in Figures 3 to 5 features two diametrically opposed slots 32 spaced 180 degrees, center to center, from one another.
  • the hanger retainer may be provided in various forms capable of acting as a stop collar while still allowing fluid flow past it.
  • the hanger retainer 16 is functional so long as some portion(s) thereof extends beyond the periphery of the mandrel 18 to block motion of the swab cup(s) past it and some type of opening is provided that, with the cup(s) slid up against the hanger retainer, communicates with the opening in the swab cup 22 to allow fluid flow upward past the cup.
  • the hanger retainer could have round cross section with one or more bores passing through the hanger retainer from its bottom surface to its top surface at a radial position close enough to the mandrel periphery to communicate with the opening of a swab cup sitting against its bottom surface.
  • the cleaning device of the illustrated embodiments can be operated in a number of ways. With swabbing taking place automatically during lifting of the tool, it can be used for swabbing only by never pumping any circulation fluid down into the wellbore, for circulation on the way down the wellbore only by pumping circulation fluid only during lowering, for circulation on the way back up the wellbore only without any cleaning on the way down by pumping circulation fluid only during raising, or for circulation during both lowering and raising by pumping fluid down the wellbore during both.
  • the mechanism for selectively allowing and preventing flow through the passageway 52 across the cup 22 is the sliding of the cup along the mandrel 18 as controlled by selective directional motion of the tool along the wellbore.
  • the device may be equipped with a control mechanism independent of the direction of motion of the tool body along the wellbore.
  • the passageway 52 need not be movable along the mandrel 18 as described in the illustrated embodiments where it is partially defined by the cup 22 in order to facilitate operation between an open state in which flow is allowed across the cup and a closed state in which flow is prevented across the cup.
  • the passageway may be a separate conduit extending along the tool body and communicating with an exterior thereof at an upper port and a lower port with the upper port being closer to the upper end of the tool body than the lower port and the cup slidable along the tool body between a flow-allowing position between the upper and lower ports and a flow-blocking position on a side of one of the upper and lower ports opposite the other. Fluid flow through the passageway would transfer fluid from one side of the cup to the other when positioned between the ports, but would not transfer across the cup when on a side of one opposite the other.
  • the ports on the hanger retainer 16, mandrel 18 and bottom stopper 20 form a first intake port, a set of second discharge ports and an additional third discharge port respectively. It should be appreciated however, that circulation and swabbing by the same tool require only a first intake port and at least one second discharge port spaced apart on the tool body.
  • the additional discharge port 60 on a side of the cup 22 opposite the first end 12 of the tool body with the passageway 52 closed is not necessary to facilitate circulation and swabbing and may be omitted or plugged in cases where fluid delivery below the closed passage is not desirable. It may not be necessary to have the cup 22 pass from one side of the ports 26 to the other. For example, an embodiment having the ports 26 disposed on the tool body above the cup 22 at all times would also allow circulation during both lowering and raising of the tool within the wellbore. However, in embodiments where the cup is slidable along the tool body to control access to the passageway, positioning the ports on the portion of the body on which the cup slides increases the number of functions provided by a single piece. Other mechanisms for controlling access from one side of a swab cup to another are known to those of skill in the art and may be applied to the present invention.
  • the cleaning device of the illustrated embodiments provides a device of relatively simple construction, comprising four main elements, that allows swabbing to be carried out with optional fluid circulation without having to lower multiple devices into the wellbore.
  • the device of the illustrated embodiments can be summarized as having: a) a hanger retainer that is axially ported and threaded or pinned to continuous coil or jointed pipe that is used to lower the invention into the well.
  • This retainer is large enough to prevent swab cup(s) from riding up past the retainer due to drag between the swab cup(s) and the casing, but is slotted on the outer surface to allow fluids to pass while lowering the entire invention into the well, b) swab cup(s), usually manufactured from rubber and steel, that allow fluid to pass by and through while lowering the invention into the well but seal against the bottom cup stopper and the well casing inner wall when pulled up out the well, c) ported swab mandrel consisting of hollow tubing or pipe, radially cross-drilled to allow pumped fluids from inside the coil or jointed pipe above to flow from inside the tube to outside, d) a bottom cup stopper designed to hold the swab cup(s) in place and seal 15 against the cups when pulling the tool upward out of the well and through-ported for flow to a bottom hole that may be plugged or have another device attached -(i.e. check valve and/or jetting nozzle).
  • a tool in accordance with the present invention may be used in oil and/or gas wells or pipelines that require servicing to remove liquids and solids from the wellbore.
  • a tool in accordance with the present invention may similarly be used in pipelines.
  • Such a tool may be inserted into the well or pipeline using continuous coiled tubing as coil rigs usually have provisions for pumping fluids inside of the coiled tubing and snubbing (pushing) or pulling the tubing in or out of the well or pipeline.
  • the tool may be inserted into the well or pipeline far enough to reach where liquids and/or solids are located. Fluids such as water, air or nitrogen may be pumped through the coil and out the ports on the ported swab mandrel while running in.
  • Jetting-action may be used to loosen and mobilize solids by pumping air, water or other fluids through some or all of the flow ports on the mandrel and/or out the three quarter inch or other sized port on the bottom which mayor may not have a jetting nozzle and/or check valve.
  • the swab cup(s) In the pulling-out position, the swab cup(s) seal against the bottom cup stopper and allow clean-out by jetting action (air, water or other fluids) above the cups.
  • jetting action air, water or other fluids
  • the jetting action can be stopped and the well or pipeline can be swabbed using only the cup(s) to pull fluid out of the well or pipeline.
  • the hanger retainer 16 of the device is releasably connected to the mandrel 18 by mating threads 66 disposed on the two components.
  • the bottom stopper 20 is secured to the mandrel 18 by roll pin connectors 68 in a manner known to those of skill in the art to provide a known shear point at which the tool will break should it become stock within the wellbore.
  • the bottom stopper 20 extends further upward into the mandrel 18 to form a fish neck 70 that can be retrieved from the wellbore using known fishing or retrieving tools after recovering the hanger retainer 16 and mandrel 18 by retracting the fluid conveying tubing 24 should the stopper 20 be sheared off.
  • the different components of the tool body may be interconnected in these or other arrangements known to those of skill in the art.
  • the hanger retainer 16 and swab mandrel 18 may also be connected with shear pins or screws between them and a fishing neck formed on the upper end of the mandrel 18.
  • the shear pins may be of an adjustable design allowing a change in the force required to shear off the fish-necked component(s) to suit various applications.
  • a tool in accordance with the present invention may be used in a gas, oil or water well or pipeline and is not limited to use in vertical wells, as it may also be used in slant, deviated or horizontal wells or pipelines.
  • the device may be made of various materials familiar to those of skill in the art including steel, plastic, rubber and other composites.
  • the tool may be used with air, water, oil, nitrogen or other circulating fluids with circulation being possible during one or more of running in, standing still, and pulling out of the well or pipeline.
  • the device may be used strictly as a swabbing tool with the option to circulate fluids only to assist in removal of the tool should it become stuck in the well or pipeline.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Cleaning In General (AREA)

Abstract

L'invention concerne un outil d'entretien de puits ou de pipeline. La présente invention ajoute des caractéristiques de circulation à un mandrin de pistonnage classique, ce qui permet de réaliser à la fois le pistonnage et la circulation dans des circonstances où l'un ou l'autre ne suffit pour atteindre l'objectif souhaité, à savoir l'élimination efficace de fluides ou de matières solides d'un puits de forage ou d'un pipeline. L'invention permet le pistonnage avec ou sans circulation, sans qu'il soit nécessaire d'introduire l'équipement dans le puits ou le pipeline ou de l'en sortir pour le changer.
PCT/US2007/025165 2006-12-08 2007-12-07 Dispositif et procede de nettoyage de puits WO2008073343A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US86913706P 2006-12-08 2006-12-08
US60/869,137 2006-12-08

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WO2008073343A1 true WO2008073343A1 (fr) 2008-06-19
WO2008073343A8 WO2008073343A8 (fr) 2008-07-31

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2890861A4 (fr) * 2012-08-28 2016-06-08 Halliburton Energy Services Inc Systèmes de déplacement et de nettoyage de colonne montante et leurs procédés d'utilisation
US20220235638A1 (en) * 2020-06-04 2022-07-28 Emil Worm Sectional Pumping Apparatus for Well Case

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4498536A (en) * 1983-10-03 1985-02-12 Baker Oil Tools, Inc. Method of washing, injecting swabbing or flow testing subterranean wells
US5839511A (en) * 1997-06-06 1998-11-24 Williams; Donald L. Blowout preventer wash-out tool
US6758276B2 (en) * 1999-06-10 2004-07-06 M-I L.L.C. Method and apparatus for displacing drilling fluids with completion and workover fluids, and for cleaning tubular members
US6901999B2 (en) * 2002-11-08 2005-06-07 Nabors Industries, Inc. Swabbing tool for wells

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4498536A (en) * 1983-10-03 1985-02-12 Baker Oil Tools, Inc. Method of washing, injecting swabbing or flow testing subterranean wells
US5839511A (en) * 1997-06-06 1998-11-24 Williams; Donald L. Blowout preventer wash-out tool
US6758276B2 (en) * 1999-06-10 2004-07-06 M-I L.L.C. Method and apparatus for displacing drilling fluids with completion and workover fluids, and for cleaning tubular members
US6901999B2 (en) * 2002-11-08 2005-06-07 Nabors Industries, Inc. Swabbing tool for wells

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2890861A4 (fr) * 2012-08-28 2016-06-08 Halliburton Energy Services Inc Systèmes de déplacement et de nettoyage de colonne montante et leurs procédés d'utilisation
US20220235638A1 (en) * 2020-06-04 2022-07-28 Emil Worm Sectional Pumping Apparatus for Well Case
US11608722B2 (en) * 2020-06-04 2023-03-21 Emil Worm Sectional pumping apparatus for well case

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