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WO2004081337A1 - Soupape de derivation de fond et sa methode d'utilisation - Google Patents

Soupape de derivation de fond et sa methode d'utilisation Download PDF

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Publication number
WO2004081337A1
WO2004081337A1 PCT/GB2004/001095 GB2004001095W WO2004081337A1 WO 2004081337 A1 WO2004081337 A1 WO 2004081337A1 GB 2004001095 W GB2004001095 W GB 2004001095W WO 2004081337 A1 WO2004081337 A1 WO 2004081337A1
Authority
WO
WIPO (PCT)
Prior art keywords
bypass valve
closing means
wellbore
piston
downhole
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.)
Ceased
Application number
PCT/GB2004/001095
Other languages
English (en)
Inventor
Bruce Mcgarian
Rory Mccrae Tulloch
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.)
Smith International Inc
Original Assignee
Smith International 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 Smith International Inc filed Critical Smith International Inc
Publication of WO2004081337A1 publication Critical patent/WO2004081337A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/10—Valve arrangements in drilling-fluid circulation systems
    • E21B21/103—Down-hole by-pass valve arrangements, i.e. between the inside of the drill string and the annulus

Definitions

  • the present invention relates to a bypass valve for use in a wellbore and to a method of using a bypass valve in a wellbore cleaning operation.
  • bypass valve It is common practice in the oil and gas drilling industry to incorporate a bypass valve in a drill string between a MWD (Measurement While Drilling) tool and a hydraulic anchor packer so that wellbore fluid may be pumped down the drill string to operate the MWD tool without prematurely setting the anchor packer.
  • MWD Measurement While Drilling
  • a bypass valve is disclosed in US 4,258,801 and comprises a deformable ball for closing a vent hole.
  • a more conventional bypass valve typically incorporates a piston which slides within a cylinder in response to dynamic fluid pressure.
  • the wall of the cylinder is provided with a plurality of vent holes which allows fluid to pass from the drill string bore to the wellbore annulus.
  • the piston is held in an open position by retaining means (such as a spring or a shear pin) and thereby allows wellbore fluid to operate a MWD tool located uphole of the bypass valve whilst preventing the generation of a pressure differential between the interior and exterior of the drill string sufficient to set an anchor packer.
  • retaining means such as a spring or a shear pin
  • the static pressure of the wellbore fluid in the annulus may be increased by a pump located at the surface, with the internal bore of the drill string having been sealed off, so as to generate a sufficient pressure above the downhole hydrostatic pressure to, for example, rupture a burst disc provided in the bypass valve casing and thereby apply a pressure differential across the length of a second piston.
  • the pressure differential acts to press the second piston into a closed position in which the vent holes in the wall of the cylinder are sealed.
  • the secondary closing means can only be moved from the open configuration to the closed configuration. Once in the closed configuration, the secondary closing means cannot be moved back to the open configuration unless the bypass valve is tripped out of hole. This is generally not problematic since the secondary closing means is used only occasionally (i.e. in the event of a failure of the primary closing means) and, once a decision has been taken to close the bypass valve with the secondary closing means, the need to immediately re-open the valve arises relatively infrequently. If this need does arise, then the bypass valve must be tripped out of hole. However, this should not necessarily be perceived as an added inconvenience since there was already a need to recover the bypass valve in order to repair the primary closing means.
  • bypass valves in an annulus cleaning operation and the use of the prior art bypass valves in such an operation is not satisfactory.
  • a flushing of the wellbore annulus in order to remove undesirable debris involves pumping fluid down the annulus and up the interior of a downhole assembly at relatively high fluid flow rates.
  • a flow of fluid down the annulus and up the interior of the bypass valve will cause the primary closing means to move to an open configuration.
  • fluid to flow from the annulus into the bypass valve via the vent holes rather than flowing down the entire length of the assembly so as to maximise the length of wellbore which is cleaned.
  • Even the prior art bypass valves with secondary closing means are not suitable.
  • the flow of wellbore fluid down the annulus may be sufficient to activate the secondary closing means (i.e. rupture the burst disc) and move said means to a closed configuration. Fluid will then be prevented from flowing from the annulus into the bypass valve via the vent holes.
  • the secondary closing means i.e. rupture the burst disc
  • bypass valve is effectively rendered useless for subsequent operations and must be tripped out of hole in order to be reset. This is particularly inconvenient considering that the primary closing means remains in working order.
  • the prior art valves with secondary closing means are not therefore suitable for an annular flushing operation which takes place before a required conventional circulating of wellbore fluid down the assembly with the valve in both open and closed configurations.
  • the present invention provides a downhole bypass valve according to the appended independent Claim 1.
  • a bypass valve comprising further novel and advantageous features is defined in the appended dependent Claims 2 to 8.
  • the piston of the primary closing means is movable by hydraulic means.
  • the piston is movable by means of fluid pressure.
  • the geometry of the piston may be such that a fluid in the bore of the valve generates a resultant force biasing the piston.
  • the arrangements of the bypass valve may be such that the piston closes a vent hole by covering said vent hole when in the second (closed) position.
  • the present invention provides a method of cleaning a wellbore according to the appended independent Claim 9.
  • a method comprising further novel and advantageous features is defined in the appended dependent Claims 10 to 12.
  • Figure 1 is a cross-sectional side view of a prior art bypass valve
  • Figure 2 is a cross-sectional partial side view of a first embodiment of the present invention
  • Figure 3 is a plan view of the exterior of a vent hole of the first embodiment
  • Figure 4 is a cross-sectional partial side view of a second embodiment of the present invention arranged with secondary closing means in an open configuration
  • Figure 5 is a plan view of the exterior of a vent hole of the second embodiment
  • Figure 6 is a cross-sectional partial side view of the second embodiment arranged with the secondary closing means in a closed configuration
  • Figure 7 is a cross-sectional partial side view of a third embodiment of the present invention.
  • Figure 8 is a plan view of the exterior of a vent hole of the third embodiment.
  • Figure 9 is a cross-sectional side view of a wellbore cleaning assembly comprising the bypass valve of Figures 2 and 3 modified so as to include a multi-cycle pin and groove arrangement for controlling the reciprocating movement of the primary closing means.
  • bypass valve of Figure 1 is a conventional "sliding piston" bypass valve incorporating primary closing means only. This prior art bypass valve is described in detail below.
  • the apparatus of Figure 1 is a conventional bypass valve 2 comprising a plurality of internal parts mounted within the bore 6 of a casing 4.
  • a shoulder 8 is provided in the bore 6 so as to prevent undesirable axial movement of the internal parts towards the lower end 10 of the bypass valve.
  • Four vent holes 12 are located in the casing 4 uphole of the shoulder 8 and arranged so as to be coplanar and equispaced about the circumference of the casing bore 6. The vent holes 12 allow fluid to either enter the bypass valve from the wellbore annulus or enter the wellbore annulus from the bypass valve.
  • the plurality of internal parts includes a seal housing 18, a sleeve 20 and a piston 22.
  • the seal housing 18 is substantially cylindrical in shape and has an outer diameter similar to the diameter of the casing bore 6 defined by the portion of the casing 4 uphole of the shoulder 8.
  • the seal housing 18 is located downhole of the vent holes 12 and is arranged so as to abut the shoulder 8.
  • the sleeve 20 is also substantially cylindrical in shape, the upper end thereof having an outer diameter similar to that of the casing bore 6.
  • the lower end 28 of the sleeve 20 has an outer diameter which is less than that of the seal housing 18.
  • the sleeve 20 is arranged within the casing 4 with the lower end 28 of the sleeve 20 located in abutment with the seal housing 18.
  • a vent chamber 30 in fluid communication with the vent holes 12 is thereby defined by the lower end 28 of the sleeve 20, the seal housing 18 and the casing 4.
  • the vent chamber 30 defines an annular shape and is in fluid communication with a plurality of vent chamber ports 32.
  • the piston 22 is located in abutment with the inner surface 36 of the seal housing 18. The arrangement is such that the piston 22 may rotate and move axially within the sleeve 20 and the seal housing 18.
  • the lower end 38 of the piston 22 extends beyond the vent chamber ports 32 and is provided with a plurality of piston holes 40 in the form of elongated slots.
  • the piston holes 40 allow wellbore fluid to pass from the vent chamber 30 in a piston bore 42 defined by the piston 22.
  • the upper end 44 of the piston 22 is provided with connecting means 46 which allow the attachment of an appropriate nozzle (not shown) to the piston 22 so as to effectively reduce the diameter of the piston bore 42.
  • the attachment of a nozzle to the piston 22 reduces the flow rate of wellbore fluid required to move the piston 22 axially within the sleeve 20. The flow rate at which the bypass valve closes may therefore be varied with the inclusion of a suitable nozzle.
  • the piston 22 and the sleeve 20 define a piston spring chamber 48 in which a piston spring 50 is located.
  • the piston spring 50 presses against the lower end 28 of the sleeve 20 and the upper end 44 of the piston 22, and thereby biases the piston 22 towards the upper end 52 of the bypass valve.
  • Axial movement of the piston 22 is assisted by the venting of the piston spring chamber 48 to the vent chamber 30 by means of a piston spring chamber ports 56 located in the sleeve lower end 28.
  • the axial movement of the piston 22 is restricted by a piston stop 58 and a piston circlip 60.
  • the sleeve 20 extends uphole of the piston 22 so as to abut a cross-over member (not shown) to which the casing 4 is threadedly connected.
  • O-ring seals 62, 64, 66, 68 are provided in order to prevent undesirable ingress of wellbore fluid.
  • Glyd ring seals 72, 74 are also provided to seal the interfaces of the piston 22 and to assist with the movement of the piston 22 within the sleeve 20 and the seal housing 18.
  • Slyd rings 70, 76 are further provided as a bearing surface for the piston 22.
  • the bypass valve 2 is run into a wellbore whilst arranged in an open configuration (i.e. with the piston 22 biased towards the upper end 52 of the bypass valve so that the piston holes 40 are substantially in line with the vent chamber ports 32) and thereby allows wellbore fluid to enter the drill string through the vent holes 12.
  • debris may be prevented from entering the drill string by the inclusion of filter discs in the vent holes 12.
  • the flow of wellbore fluid into the bypass valve equalises the very high hydrostatic pressures exerted on the outer surface of the drill string.
  • the wellbore fluid held within the drill string is circulated down the drill string bore at a predetermined flow rate sufficient for the operation of a MWD tool, but not high enough to generate the dynamic pressure required to activate the bypass valve.
  • the wellbore fluid flows from the surface, through the MWD tool, into the wellbore annulus via the vent holes 12, and back to the surface through the annulus. Hydraulic anchor packers located downhole of the bypass valve 2 are not thereby exposed to a setting pressure differential.
  • the hydraulic anchor packers are set by moving the bypass valve into a closed configuration.
  • the piston holes 40 are located downhole of the glyd ring seal 74 provided between the seal housing 18 and the lower end 38 of the piston 22, and the flow of wellbore fluid between the piston bore 42 and the wellbore annulus is thereby prevented.
  • the movement of the bypass valve into the closed configuration is simply achieved by increasing the flow rate of wellbore fluid down the drill string and out through the vent chamber ports 32 so that sufficient dynamic pressure is generated across the length of the piston 22 to overcome the biasing force of the piston spring 50.
  • the required setting pressure differential at the anchor packers is generated. This results in a large pressure rise at the surface indicating that the anchor packers have been set.
  • a bypass valve according to the present invention may be advantageously used as an alternative to the bypass valve 2 described above and three embodiments are shown in Figures 2 to 9 of the accompanying drawings.
  • the bypass valves shown in these figures have a substantially similar arrangement to the prior art bypass valve shown in Figure 1 and the components of these bypass valves which correspond to components of the prior art bypass valve have been labelled with the reference numerals used in Figure 1.
  • the bypass valves shown in Figures 2 to 8 are identical to the bypass valve of Figure 1 other than in certain respects as shown in the partial views of Figures 2 to 8!
  • a Glyd-ring seal 63 is received in a circumferential groove on the exterior cylindrical surface of the sleeve lower end at a location downhole of the vent hole 12. This Glyd- ring seal 63 prevents an ingress of fluid between the casing 4 and the sleeve lower end and into the bore 6.
  • a Glyd-ring seal 71 is located in a circumferential groove in the interior surface of the sleeve lower end at a location downhole of the vent chamber ports 32. The Glyd-ring seal 71 serves to prevent an ingress of fluid between the lower end of the piston 22 and sleeve 20 when the piston 22 is in the closed position.
  • a Glyd-ring 75 is located in a circumferential groove in the interior surface of the sleeve 20 at a location above the vent chamber ports 32.
  • the Glyd-ring seal 75 serves to assist the sliding movement of the piston 22 within the sleeve 20.
  • each vent hole 12 is provided with secondary closing means for selectively closing the associated vent hole and thereby prevent a flow of fluid therethrough. More specifically, the secondary closing means serves to prevent fluid flowing through the vent hole 12 into the bypass valve 102 but not prevent fluid from flowing in the opposite direction through the vent hole 12. The secondary closing means also functions to allow fluid to flow at a relatively low rate through the vent holes 12 into the bypass valve. However, the secondary closing means is designed so that, above a predetermined rate of fluid flow into the bypass valve, the secondary closing means becomes activated so as to close the vent holes 12 and thereby prevent further flow into the bypass valve via the vent holes 12.
  • the secondary closing means associated with each vent hole 12 comprises a ball 80 held captive within the associated vent hole 12 between a valve seat 82 and a perforated cup 84.
  • the perforated cup 84 is retained within the vent hole 12 by means of a circlip 86 (although other suitable fixing means may be used).
  • the ball 80 and/or valve seat 82 may be manufactured from or coated with a resiliently deformable material such as rubber so as to improve the fluid seal between these two components.
  • valve seat 82 has- a frusto-conically shaped surface for sealing engagement with the ball 80.
  • the sealing surface of the valve seat 82 is angled relative to the longitudinal axis of the bypass valve and, as a consequence, when the bypass valve is arranged with its longitudinal axis vertical or near vertical, the ball 80 will tend to roll down the sealing surface and away from a sealing position with the valve seat 82. The ball 80 is thereby biased away from a sealing position and fluid flowing at a relatively low rate will be able to flow past the ball
  • vent hole 12 Fluid flowing through the vent hole 12 does so through one of a plurality of apertures 88 extending through the perforated cup 84.
  • the apertures form fluid passageways extending laterally through the vent hole 12.
  • the perforated cup 84 comprises a concave surface 90 (having a hemispherical shape) which functions to receive the ball 80 when the ball 80 moves from a sealing position with the valve seat 82. All but one of the fluid passageways extending through the cup are located radially beyond the surface 90 and laterally extend sufficiently far into the vent hole 12 for fluid flowing into the bypass valve via the vent hole 12 to be directed past the ball 80 when the ball 80 is received on the surface 90. This allows fluid of low flow rates to pass the ball 80 without displacing the ball 80 into .engagement with the valve seat 82.
  • the first embodiment 102 is run downhole as part of a wellbore cleaning assembly.
  • some fluid may enter the bypass valve via the vent holes 12 provided the flow rate through the vent holes 12 is not sufficiently high to move the balls 80 in the vent holes 12 into sealing engagement with their associated valve seats 82.
  • each ball 80 will tend to move to an open position.
  • the bypass valve may then be used in a conventional way by pumping fluid through the bore 6.
  • Fluid vented through a vent hole 12 will press the associated ball 80 into engagement with the adjacent hemispherical surface 90. . Although this will tend to seal the central aperture 88, the surrounding apertures 88 will remain open and allow fluid to flow from the ball 60 into the annulus. However, if the annulus is to be flushed with a downhole flow of fluid, the fluid flow rates involved will be sufficient to press the ball 80 into sealing engagement with the valve seat 82. All fluid will then be prevented from entering the bypass valve at the vent holes 12 and be directed past the bypass valve. Debris may then be flushed down the annulus and up through the interior of the assembly.
  • a second embodiment 202 of the present invention is shown in Figure 4.
  • the second embodiment is identical to the first embodiment except that the frusto-conical surface of the valve seat 82 is provided with three elongate members 204 extending laterally therefrom. It will be apparent that only two of said members 204 are visible in the view of Figure 4.
  • the elongate members 204 may be conveniently provided as screw threaded components which are screwed into the frusto-conical sealing surface.
  • the members 204 are spaced equi-distant about the circumference of a circle concentric with the annular shape of the sealing surface, said circle having a diameter less than that of the ball so that the ball is unable to move past said members and sealingly engage the valve seat without deforming (see Figure 4).
  • the rate at which fluid may flow into the bypass valve through the vent holes 12 is considerably greater than for the first embodiment.
  • the ball 206 is made from a resiliently deformable material which allows a predetermined rate of fluid flow through the vent hole, and into the bypass valve, to deform the ball 206 and push it passed said members into sealing engagement with the valve seat (see Figure 6). Once in engagement with the valve seat, the deformed ball is gripped by the three members 204. As a result, the ball will not readily move from the closed position unless forced to do so by fluid pressing from the interior of the bypass valve.
  • the third embodiment 302 comprises an entirely different secondary closing means to the first two embodiments 102,202. Rather than comprising a valve closure in the form of a ball, the third embodiment 302 comprises a closure in the form of a hinged flap 304 biased into sealing engagement (i.e. the closed position of Figure 7) by means of a torsion spring 306.
  • the flap 304 is pivotally connected to a cylindrical base unit 308 by means of a hinge 310.
  • the base unit 308 is retained in position within the associated vent hole 12 by means of a circlip 312 (although other suitable securing means could be used).
  • the base unit 308 has a longitudinally extending rib 314 projecting lateral from its exterior cylindrical surface (see Figure 8).
  • the rib 314 locates in a corresponding groove in the vent hole 12 so as to prevent the base unit 308 from rotating within the vent hole 12.
  • the secondary closing means of the third embodiment therefore serves to prevent any flow of fluid through the vent holes from the annulus but allow fluid flow in the opposite direction.
  • the flap 304 remains in a sealing position (so as to close the vent hole 12) unless forced open against the spring 306 bias by fluid pressing on the flap 304 from the interior of the bypass valve.
  • Wellbore fluid does not therefore enter the bypass valve via the vent holes 12 as the bypass valve is run in hole.
  • the drill string may be filled with fluid from the surface periodically as the string is run in hole.
  • any of the above described embodiments of the present invention may be modified to include a control groove and pin arrangement for controlling movement of the piston 22 relative to the sleeve 20.
  • the first embodiment 102 is shown in Figure 9 modified in this way.
  • the bypass valve 402 shown in Figure 9 differs from the first embodiment 102 in that two control pins 404 extend laterally from opposite sides of the casing 4 into engagement with a control groove 406 defined in the exterior surface of the uphole end of the piston 22.
  • the control groove 406 circumscribes the piston 22 and, as will be understood by the skilled person, defines a path extending up and down the piston along which the control pins 404 may pass. In this way, the primary closing means of the bypass valve 402 may be cycled between two conditions wherein, in the first condition, the application of a fluid flow rate sufficient to move the piston 22 will open the vent holes, and, in the second condition, the application of a fluid flow rate sufficient to move the piston 22 will not open the vent holes.
  • the bypass valve 402 is shown in Figure 9 incorporated within a wellbore cleaning assembly 500 located in a 9 5/8 inch wellbore casing (which reduces to a 7 inch casing) 510.
  • the assembly 500 comprises a 6 5/8 inch drill pipe 520, a bypass valve 402 according to the present invention, a first cross-over member 530, a 5 inch drill pipe 540, a casing scraper 550, a second cross-over member 560 and a mill 570.
  • the present invention is not limited to the particular embodiments described. Further variations will be apparent to a reader skilled in the art.
  • the first embodiment may be modified so that the ball is biased by means of a spring into engagement with the valve seat. In this way, no fluid (even of a low flow rate) will be admitted from the annulus into the valve via the vent holes.
  • This modified valve will then operate in a similar manner to the third embodiment.
  • the cleaning assembly shown in Figure 9 may also comprise a junk/debris catcher which will retain within the assembly junk/debris flushed from the annulus and into the assembly via ports in the mill (or bull nose).

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

Abstract

L'invention concerne une soupape de dérivation à utiliser dans un puits de forage et une méthode d'utilisation d'une soupape de dérivation dans une opération de nettoyage de puits de forage. L'invention concerne une soupape de dérivation présentant principalement un moyen de fermeture permettant d'ouvrir et de fermer un évent permettant une communication fluidique entre un alésage de la soupape et l'extérieur de la soupape. Cette soupape de dérivation comprend également un moyen de fermeture secondaire permettant d'éviter une communication fluidique entre l'alésage (6) et l'extérieur de la soupape de dérivation, par l'évent (12). Le moyen de fermeture secondaire (206) peut être déplacé, en réaction à une pression fluidique prédéterminée, d'une configuration fermée à une configuration ouverte, dans laquelle la communication fluidique au moyen de l'évent (12) est respectivement empêchée et permise.
PCT/GB2004/001095 2003-03-13 2004-03-15 Soupape de derivation de fond et sa methode d'utilisation Ceased WO2004081337A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0305804.7 2003-03-13
GB0305804A GB2399361A (en) 2003-03-13 2003-03-13 Downhole bypass valve

Publications (1)

Publication Number Publication Date
WO2004081337A1 true WO2004081337A1 (fr) 2004-09-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2004/001095 Ceased WO2004081337A1 (fr) 2003-03-13 2004-03-15 Soupape de derivation de fond et sa methode d'utilisation

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GB (1) GB2399361A (fr)
WO (1) WO2004081337A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2010200739B2 (en) * 2006-10-11 2012-01-19 Weatherford Technology Holdings, Llc Active intake pressure control of downhole pump assemblies
CN116122770A (zh) * 2023-03-01 2023-05-16 海南新川工程技术有限公司 一种可多次开关旁通阀

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7331392B2 (en) 2005-08-06 2008-02-19 G. Bosley Oilfield Services Ltd. Pressure range delimited valve
SG11201406048XA (en) 2012-05-30 2014-10-30 Halliburton Energy Services Inc Auto-filling of a tubular string in a subterranean well
CN103321568B (zh) * 2013-07-17 2015-07-01 西南石油大学 一种长寿命高性能螺杆钻具
CN112065329B (zh) * 2019-06-11 2022-08-30 中国石油天然气股份有限公司 油气井筒的清洗工具及方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4258801A (en) 1979-06-14 1981-03-31 Eastman Whipstock, Inc. Dump valve for use with downhole motor
US4685520A (en) * 1985-08-14 1987-08-11 Mcdaniel Robert J Open hole pipe recovery circulation valve
WO1997047853A1 (fr) * 1996-06-12 1997-12-18 Sbs Drilling- And Production-Systems Gmbh & Co. Kg Procede et dispositif pour le rinçage et/ou le nettoyage d'une conduite de refoulement
WO2000041487A2 (fr) * 1999-01-11 2000-07-20 Weatherford/Lamb, Inc. Tuyauterie et methode de lubrification
US6095249A (en) 1995-12-07 2000-08-01 Mcgarian; Bruce Down hole bypass valve
US6293342B1 (en) 1997-07-28 2001-09-25 Smith International, Inc. Bypass valve closing means

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4258801A (en) 1979-06-14 1981-03-31 Eastman Whipstock, Inc. Dump valve for use with downhole motor
US4685520A (en) * 1985-08-14 1987-08-11 Mcdaniel Robert J Open hole pipe recovery circulation valve
US6095249A (en) 1995-12-07 2000-08-01 Mcgarian; Bruce Down hole bypass valve
WO1997047853A1 (fr) * 1996-06-12 1997-12-18 Sbs Drilling- And Production-Systems Gmbh & Co. Kg Procede et dispositif pour le rinçage et/ou le nettoyage d'une conduite de refoulement
US6293342B1 (en) 1997-07-28 2001-09-25 Smith International, Inc. Bypass valve closing means
WO2000041487A2 (fr) * 1999-01-11 2000-07-20 Weatherford/Lamb, Inc. Tuyauterie et methode de lubrification

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2010200739B2 (en) * 2006-10-11 2012-01-19 Weatherford Technology Holdings, Llc Active intake pressure control of downhole pump assemblies
CN116122770A (zh) * 2023-03-01 2023-05-16 海南新川工程技术有限公司 一种可多次开关旁通阀

Also Published As

Publication number Publication date
GB0305804D0 (en) 2003-04-16
GB2399361A (en) 2004-09-15

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