US3815676A - Indexing equalizing valve for retrievable well packer - Google Patents

Indexing equalizing valve for retrievable well packer Download PDF

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Publication number
US3815676A
US3815676A US00298107A US29810772A US3815676A US 3815676 A US3815676 A US 3815676A US 00298107 A US00298107 A US 00298107A US 29810772 A US29810772 A US 29810772A US 3815676 A US3815676 A US 3815676A
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United States
Prior art keywords
mandrel
sleeve valve
flow passage
indexing
pair
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Expired - Lifetime
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US00298107A
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English (en)
Inventor
N Read
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.)
Dresser Industries Inc
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Dresser Industries Inc
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Publication date
Application filed by Dresser Industries Inc filed Critical Dresser Industries Inc
Priority to US00298107A priority Critical patent/US3815676A/en
Priority to CA179,640A priority patent/CA976875A/en
Priority to AR250123A priority patent/AR225584A1/es
Priority to DE2352085A priority patent/DE2352085C3/de
Application granted granted Critical
Publication of US3815676A publication Critical patent/US3815676A/en
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    • 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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
    • E21B33/134—Bridging plugs
    • 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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/12—Packers; Plugs

Definitions

  • a mandrel having a central flow passage and a pair of ports at the uppermost end of the flow passage terminating in the central portion of the mandrel has a pair of reference pins spaced 180 apart near the uppermost end of the mandrel.
  • a sleeve valve having a pair 1 June 11, 1974 of indexing pins spaced 180 apart near the center of the sleeve and having a pair of ports spaced 180 around the sleeve is rotatably attached around the mandrel in a matching relationship to the ports in the mandrel.
  • The'lower end of the mandrel is threadedly connected to a connection member which is threadedly engaged to a gudgeon coupling assembly which in turn is threadedly engaged to the uppermost end of a well packer.
  • a running tool attached to the lower end of a tubing string has a freely rotating tubular indexer with a pair of indexing slots spaced 180 apart which are adapted to first engage the reference pins.
  • Each of the indexing slots has an initial channel running parallel to the longitudinal axis of the indexer and a second channel running oblique to the first channel, the oblique channel then communicating with a third channel running parallel to the longitudinal axis of the indexer and offset from the first channel by 90 around the circumference of the indexer.
  • the indexing slots in combination with the reference pins prevent further rotation of the indexer and also engage the indexing pins on the sleeve valve, thus causing the sleeve valve to rotate and the ports in the mandrel to be aligned with the ports in the sleeve, whereby the pressures below and above the packer are equalized.
  • the gudgeon coupling assembly threaded into the well packer is engaged with a jay slot assembly carried by the running tool to manipulate the packer.
  • the reference pins prevent rotation of the indexer, thus causing the sleeve valve to rotate to the closed position.
  • This invention relates generally to a well packer, and in particular, to apparatus for equalizing the pressures above and below a retrievable well packer.
  • a well packer or bridge plug is essentially an isolation tool adapted to be run into an oil well and set to isolate a lower portion of the well from an upper portion of the well in which pressure operations, such as treating, acidizing, formation fracturing, squeezing, swabbing, testing, etc. are to be carried out. With such operations, the tubular string upon which the bridge plug is run and set is disconnected therefrom to expedite each of the above operations.
  • a retrievable bridge plug is one in which the apparatus can be retrieved without the destruction thereof, for example, as by drilling out the bridge plug, such bridge plugs being well known in the art, for example, as illustrated and described in U.S. Pat. No. 3,434,538 to Marion D. Kilgore and Robert C. Pumpelly, and assigned to the assignee of the present inventron.
  • the objects of the invention are accomplished, generally, by the provision of an apparatus having a tubular indexer therein with a pair of indexing slots spaced on opposite sides thereof and adapted to freely rotate within said apparatus prior to engagement with a first pair of spaced reference pins fixed to a mandrel threadedly engaged with the well packer and adapted to be partially enveloped by the tubular indexer.
  • a sleeve valve having a second pair of spaced indexing pins is adapted to rotate around the mandrel to port a flow passage in the mandrel to theexterior of the tool.
  • the reference pins on the mandrel engage the respective indexing slots.
  • the indexer While setting down, the indexer is forced by the reference pins to rotate into position for the lower portion of each of the indexing slots to receive the indexing pins on the sleeve valve. As set-down continues, the reference pins prevent further rotation of the indexer and forces the rotation of the sleeve valve to thus open the valve.
  • the indexer When picking up the running tool, the indexer is braced against rotation by the reference pins on the mandrel; however, the indexing pins force the sleeve valve to rotate, automatically positioning the ports in the sleeve valve out of line with the mandrel ports to thus close the valve. Means are also provided in the running tool to manipulate the well packer.
  • FIGS. 1A and 1B taken together, form a side elevational view, partly in cross section, of the overall apparatus according to the present invention
  • FIG. 2 is a developed view of the tubular indexer according to the present invention.
  • FIG. 3 is a tubular view of the apparatus according to FIG. 2;
  • FIG. 4 illustrates, partly in cross section, the mandrel according to the present invention
  • FIG. 5 is a cross-sectional view taken generally along the section lines A-A of FIG. 4;
  • FIG. 6 illustrates, partly in cross section, the sleeve valve according to the present invention
  • FIG. 7 is a cross section taken generally along the section lines BB of FIG. 6;
  • FIG. 8 is a developed view of the jay slot assembly according to the invention used for manipulating a well packer.
  • FIGS. 1A and 1B taken together, there is illustrated therein a mechanically actuated indexing equalizing valve and running tool assembly generally designated by the reference character 10.
  • the uppermost connection 11 of the assembly has internal threads 12 adapted for connection to the lower end of a tubing string (not shown) for utilization of the apparatus within a well bore.
  • the lower threaded connection 13 is adapted for connection with a conventional well packer assembly, for example, the threaded connection 204 of the packer assembly illustrated and described with respect to FIG. 8A in US. Pat. No. 3,548,936 to Marion D. Kilgore and Robert C. Pumpelly, and assigned to the assignee of the present invention.
  • the assembly 10 also includes a mandrel 14, shown in more detail in FIGS. 4 and 5, having a flow passage terminating within the mandrel 14 internal to the sleeve valve assembly 16 shown in greater detail in FIGS. 6 and 7.
  • the running too] assembly includes an outer cylindrical housing 17 threadedly attached to the upper connection 11 and held against rotation by set screw 18.
  • a tubular indexer 19, shown in greater detail in FIGS. 2 and 3, is mounted internal to the outer housing 17 and is adapted for freedom of rotation therein.
  • the upper end 20 of the indexer assembly 19 is restrained by the lower shoulder 21 of the upper connection 11.
  • the lower extremity 22 of the indexer assembly 19 is limited in its downward movement by the ring 29' integral therewith and the shoulder 23 on the upper end of the jay slot assembly 31 threadedly attached to the housing 17.
  • Stabilizing rings 29 and 29 provide a centering effect of the tubular indexing member 19 within the housing 17.
  • a connector housing 25 is threadedly attached at its upper end to the lower end of the mandreal 14 and at its lower end to the gudgeon coupling assembly 24.
  • An O-ring 26 provides a fluid seal between the coupling member 25 and the gudgeon coupling assembly 24.
  • 0- rings 27 and 28 provide a fluid seal between the mandrel 14 and the sleeve valve assembly 16 in addition to the other sealing elements described with respect to the valve assembly in FIGS. 6 and 7.
  • An O-ring 32 provides additional sealing between the connector member 25 and the mandrel 14.
  • a conventional milling shoe 30 is threadedly connected to the lower section of the jay slot assembly 31 in an encircling relationship to the gudgeon coupling assembly 24.
  • a conventional jay-slot assembly 31, shown in more detail in FIG. 8, is threadedly attached at its upper end to the tubular housing 17', the jay slot assembly 31 being arranged to engage the gudgeon pins on the gudgeon coupling 24 for manipulation of the well packer (not shown) which would normally be attached to the lower connector 13.
  • FIGS. 2 and 3 there is illustrated the tubular indexer 19.
  • a pair of indexing slots and 41 are formed within the tubular member 19 as is best illustrated in the developed view of FIG. 2.
  • the indexing slots 40 and 41 have initial channels 42 and 43, respectively, running parallel with the longitudinal axis of the tubular member 19 and formed 180 apart around the circumference of the tubular member 19.
  • the second stages 44 and 45 of the channels are formed oblique to the initial channels 42 and 43.
  • the slots 40 and 41 are'then seen to have additional channel portions 46 and 47, respectively, running parallel to the longitudinal axis of the tubular member 19 and likewise formed 180 apart around the circumference of the tubular member 19 but displaced 90 from the initial channel portions 42 and 43.
  • a pair of flange members 22 and 35 are formed 180 apart around the circumference of the tubular member 19 and each has sharply defined cam angles for purposes explained hereinafter with regard to the operation of the apparatus. It should be appreciated that in the fabrication of the tubular member 19, the points 22 and 35 are initially of the same dimension but during the fabrication process, the point 35 is machined off to put the point 35 in a different plane than the point 22 to facilitate the operation of the device.
  • the mandrel 14 is shown in greater detail.
  • the upper end 50 of the mandrel 14 is bullet-shaped to facilitate its enclosure by the tubular indexing member 19 illustrated in FIGS. 2 and 3.
  • a gudgeon coupling assembly 51 having gudgeon pin extensions 52 and 53 is formed in the center portion of the mandrel 14.
  • the flow passage 15 in the threaded end of the mandrel 14 is illustrated as terminating within the mandrel 14 and adapted to coincide with the sleeve valve assembly 16, illustrated in FIGS. 6 and 7, to allow fluid to pass between the flow passage 15 and the exterior of the assembly 10.
  • the flow passage 15 terminates within a cylindrical portion 54 of the mandrel 14 having a shoulder 55 for positioning the sleeve valve assembly.
  • a pair of ports 59 and 59' are formed 180 apart in the mandrel 14 to allow fluid to flow between the flow passage 15 and the exterior of the apparatus 10.
  • FIG. 5 illustrates a cross-sectional view taken through the gudgeon coupling assembly 51 along the section line AA.
  • FIGS. 6 and 7 there is illustrated a tubular shaped sleeve valve assembly 16 having a pair of gudgeon pins 60 and 61.
  • the sleeve valve 16 has a pair of ports 62 and 63 spaced 180 apart around the circumference of the sleeve valve.
  • the gudgeon pins 60 and 61 are also spaced 180 apart around the circumference of the sleeve valve and are each spaced 90 from each of the ports 62 and 63.
  • Seal members 64 and 65 are positioned 180 apart on the inner surface of the sleeve valve to provide sealing of fluids within the flow passage 15, illustrated best in FIG. 4,
  • the seal members 64 and 65 are comprised of replaceable metal inserts with a rubber or rubber-like sealing surface formed thereon whereby the expended seals can easily be replaced.
  • the ports 62and 63 are aligned with the ports-59 and 59' (not shown) in the mandrel 14.
  • FIG. 8 there is illustrated a developed view of the jay slot assembly 31 used in conjunction with the gudgeon pins on the gudgeon coupling assembly 24 illustrated in FIG. 1B.
  • the jay slot assembly 31 is essentially tubular in shape and includes a pair of conventional jay slots and 71 for engaging the gudgeon coupling pins on the assembly 24.
  • the jay slots 70 and 71 are formed apart around the circumfer-.
  • the extremities 72 and 73 are fabricated on different planes to prevent the inadvertent sticking of the points 72 and 73 on the gudgeon coupling pins on the assembly 24.
  • the upper connector 11 of the running tool assembly 10 is connected to the lower end of a tubing string which is used to cause the running tool assembly 10 to be run down over the top of the mandrel 14.
  • the milling shoe 30 enables the running tool to pass through sand and other obstructions to enable the tool to be run down over the top of the mandrel 14.
  • the indexing assembly 19 Prior to engagement with the mandrel, the indexing assembly 19 is free to rotate within the tubular housing 17 and is stabilized by the stabilizing rings 29 and 29.
  • the referencing pins 52 and 53 strike the cammed surfaces adjacent the extensions 22 and 35 on the tubular indexing member 19 causing the tubular member 19 to rotate one direction or the other, depending upon the orientation of the tubular member 19 as it is being lowered.
  • the point 35 is on a different plane than the point 22 to further guard against the possibility of the points 22 and 35 coinciding upon the referencing pins 52 and 53 and possibly causing a sticking of the assembly.
  • the referencing pins 52 and 53 first pass through the channels 42 and 43 and then through the oblique portions of the channels 44 and 45.
  • the referencing pins 52 and 53 are aligned with the channels 46 and 47 and no further rotation of the tubular assembly 19 can occur.
  • the indexing pins 60 and 61 on the valve assembly are engaged by the channels 42 and 43 and then by the oblique portions 44 and 45. Since the referencing pins 52 and 53 prevent further rotation of the indexing tube 19, this causes the valve assembly 16 to rotate until the ports 59 and 59 within the mandrel 14 are aligned with the ports 62 and 63 in the sleeve valve. At this point, the valve is opened and fluid beneath the well packer is in communication with fluid above the well packer.
  • the tubing can then be manipulated in a known manner using the gudgeon coupling assembly 24 and the jay slot assembly 31 to manipulate the packer (not shown) in any manner desired, for example, such as causing the slips on the packer to be unset and thus enabling the whole assembly, including the packer, to be removed from the well bore by pulling the tubing.
  • valve assembly 16 is closed as previously described and the running tool assembly and tubing string can be either removed from the borehole or moved further up in the borehole for additional operations. It should especially be appreciated that the closing of the valve assembly 16 is accomplished entirely by the single upward motion of the tubing string and is entirely independent of the status of the torque in the tubing, regardless of whether the torque is residual or impressed.
  • the well packer for examwhereby equalization of the pressures below and above a well packer can be obtained by merely lowering the tubing string and its related running tool onto the mandrel and related couplings used with the well packer, and the valve included with the mandrel used with the well packer be closed by a simple upward pulling of the tubing string.
  • Apparatus for use in a well with a well packer having a flow passage therethrough comprising:
  • a mandrel having a pair of referencing pins spaced 180 apart around the periphery of said mandrel and a flow passage extending therethrough from a first end of said mandrel to an intermediate portion thereof, said mandrel including port means between said mandrel flow passage and the exterior.
  • a tubular sleeve valve rotatably encircling a portion of said mandrel in juxtaposition to said port means, said sleeve valve having a pair of indexing pins spaced 180 apart around the circumference of said sleeve valve, and said sleeve valve having two ports therethrough spaced 180 apart around the circumference of said sleeve valve and away from each of said sleeve valve indexing pins;
  • said sleeve valve includes internal sealing means to prevent 5 fluid in the mandrel flow passage from exiting through said port means whenever the ports in said sleeve valve are rotated out of alignment with said port means in said mandrel.
  • said port means comprises a pair of ports spaced 180 apart around the circumference of said mandrel.
  • the apparatus according to claim 4 including in addition thereto, a gudgeon coupling assembly having a flow passage therethrough aligned with the flow passage in said mandrel and having a pair of gudgeon pins spaced 180 apart around the circumference of said gudgeon coupling assembly.
  • tubular body member having means at a first end of said body for connection to a tubing string, said body member being open at its second end;
  • a tubular indexing member having a pair of indexing slot-s therein formed 180 apart around the circumference of said indexing member, said indexing member being arranged to freely rotate within said body member and being restrained against any substantial movement along the lonitudinal axis of said body member;
  • a tubular jay slot assembly arranged internally to said body member and between said open end of said body member and said tubular indexing member, said jay slot assembly including a pair of jay slots formed therein and spaced 180 apart around the inner periphery of said jay slot assembly.
  • a mandrel having a pair of referencing pins spaced 180 apart around the periphery of said mandrel and a flow passage extending therethrough from a first end of said mandrel to an intermediate portion thereof, said mandrel including port means between said mandrel flow passage and the exterior of said mandrel;
  • a tubular sleeve valve rotatably encircling a portion of said mandrel in juxtapostion to said port means, said sleeve valve having a pair of indexing pins spaced 180 apart around the circumference of said sleeve valve, and said sleeve valve having two ports therethrough spaced 180 apart around the circumference of said sleeve valve and 90 away from each of said sleeve valve indexing pins;
  • tubular body member having means at a first end thereof for connection to a tubing string, said body member being open at its second end and sized to envelop said mandrel and said tubular sleeve valve;
  • a tubular indexing member having a pair of indexing slots therein formed apart around the circumference of said indexing member. said indexing member being arranged to freely rotate within said body member and being restrained against any substantial movement along the longitudinal axis of said body member.
  • said sleeve valve includes internal sealing means to prevent fluid in the mandrel flow passage from exiting through said port means whenever the ports in said sleeve valve are rotated out of alignment with said port means in said mandrel.
  • said port means comprises a pair of ports spaced 180 apart around the circumference of said mandrel.
  • An apparatus for use with a well packer having a flow passage therethrough comprising:
  • a mandrel adaptable for connection to the top of a well packer, said mandrel having a 'flow passage alignable with the flow passage in the well packer, said mandrel having lateral port means between said mandrel flow passage and the exterior of said mandrel;
  • a sleeve valve rotatably encircling a portion of said mandrel and having openings through the wall' thereof in juxtaposition to said port means, said sleeve valve moving between positions covering and uncovering said port means;

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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)
  • Branch Pipes, Bends, And The Like (AREA)
  • Pipe Accessories (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
US00298107A 1972-10-16 1972-10-16 Indexing equalizing valve for retrievable well packer Expired - Lifetime US3815676A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US00298107A US3815676A (en) 1972-10-16 1972-10-16 Indexing equalizing valve for retrievable well packer
CA179,640A CA976875A (en) 1972-10-16 1973-08-27 Indexing equalizing valve for retrievable well packer
AR250123A AR225584A1 (es) 1972-10-16 1973-09-17 Aparato para ser utilizado en un pozo con obturador o paquer
DE2352085A DE2352085C3 (de) 1972-10-16 1973-10-12 Vorrichtung zur Betätigung einer Bohrlochpackung

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US00298107A US3815676A (en) 1972-10-16 1972-10-16 Indexing equalizing valve for retrievable well packer

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US3815676A true US3815676A (en) 1974-06-11

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US00298107A Expired - Lifetime US3815676A (en) 1972-10-16 1972-10-16 Indexing equalizing valve for retrievable well packer

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AR (1) AR225584A1 (es)
CA (1) CA976875A (es)
DE (1) DE2352085C3 (es)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4593765A (en) * 1984-07-03 1986-06-10 Dresser Industries, Inc. Tubing resettable well tool
US6220348B1 (en) * 1998-10-20 2001-04-24 Polar Completions Engineering Inc. Retrievable bridge plug and retrieving tool
US6253853B1 (en) * 1998-10-05 2001-07-03 Stellarton Energy Corporation Fluid injection tubing assembly and method
EP0845578A3 (en) * 1996-11-27 2002-01-23 Halliburton Energy Services, Inc. Sliding side door assembly for use in a wellbore
US20090071658A1 (en) * 2005-02-26 2009-03-19 Red Spider Technology Limited Valve
US9316088B2 (en) 2011-10-11 2016-04-19 Halliburton Manufacturing & Services Limited Downhole contingency apparatus
US9376891B2 (en) 2011-10-11 2016-06-28 Halliburton Manufacturing & Services Limited Valve actuating apparatus
US9376889B2 (en) 2011-10-11 2016-06-28 Halliburton Manufacturing & Services Limited Downhole valve assembly
US9482074B2 (en) 2011-10-11 2016-11-01 Halliburton Manufacturing & Services Limited Valve actuating apparatus
EP3070256A3 (en) * 2008-05-02 2016-11-09 Weatherford Technology Holdings, LLC Fill up and circulation tool and mudsaver valve
CN111021984A (zh) * 2018-10-09 2020-04-17 中国石油天然气股份有限公司 水平井井筒控制装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4928762A (en) * 1989-02-13 1990-05-29 Halliburton Company Retrievable bridge plug and packer

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2893491A (en) * 1957-05-03 1959-07-07 Baker Oil Tools Inc Apparatus for retrieving tools in well bores
US3189096A (en) * 1961-09-12 1965-06-15 Halliburton Co Retrievable bridge plug or packer with sleeve valve
US3321016A (en) * 1964-10-07 1967-05-23 Schlumberger Technology Corp Well tool retrieving apparatus
US3420305A (en) * 1966-10-26 1969-01-07 Otis Eng Corp Well tools
US3442328A (en) * 1967-12-11 1969-05-06 Schlumberger Technology Corp Well tool valve actuators
US3483922A (en) * 1967-10-05 1969-12-16 Schlumberger Technology Corp Valve system for a well packer
US3581820A (en) * 1969-05-29 1971-06-01 Erwin Burns Port collar

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2893491A (en) * 1957-05-03 1959-07-07 Baker Oil Tools Inc Apparatus for retrieving tools in well bores
US3189096A (en) * 1961-09-12 1965-06-15 Halliburton Co Retrievable bridge plug or packer with sleeve valve
US3321016A (en) * 1964-10-07 1967-05-23 Schlumberger Technology Corp Well tool retrieving apparatus
US3420305A (en) * 1966-10-26 1969-01-07 Otis Eng Corp Well tools
US3483922A (en) * 1967-10-05 1969-12-16 Schlumberger Technology Corp Valve system for a well packer
US3442328A (en) * 1967-12-11 1969-05-06 Schlumberger Technology Corp Well tool valve actuators
US3581820A (en) * 1969-05-29 1971-06-01 Erwin Burns Port collar

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4593765A (en) * 1984-07-03 1986-06-10 Dresser Industries, Inc. Tubing resettable well tool
EP0845578A3 (en) * 1996-11-27 2002-01-23 Halliburton Energy Services, Inc. Sliding side door assembly for use in a wellbore
US6253853B1 (en) * 1998-10-05 2001-07-03 Stellarton Energy Corporation Fluid injection tubing assembly and method
US6220348B1 (en) * 1998-10-20 2001-04-24 Polar Completions Engineering Inc. Retrievable bridge plug and retrieving tool
US20090071658A1 (en) * 2005-02-26 2009-03-19 Red Spider Technology Limited Valve
US8316953B2 (en) 2005-02-26 2012-11-27 Red Spider Technology Limited Valve
EP3070256A3 (en) * 2008-05-02 2016-11-09 Weatherford Technology Holdings, LLC Fill up and circulation tool and mudsaver valve
US9316088B2 (en) 2011-10-11 2016-04-19 Halliburton Manufacturing & Services Limited Downhole contingency apparatus
US9376891B2 (en) 2011-10-11 2016-06-28 Halliburton Manufacturing & Services Limited Valve actuating apparatus
US9376889B2 (en) 2011-10-11 2016-06-28 Halliburton Manufacturing & Services Limited Downhole valve assembly
US9482074B2 (en) 2011-10-11 2016-11-01 Halliburton Manufacturing & Services Limited Valve actuating apparatus
CN111021984A (zh) * 2018-10-09 2020-04-17 中国石油天然气股份有限公司 水平井井筒控制装置

Also Published As

Publication number Publication date
AR225584A1 (es) 1982-04-15
DE2352085B2 (de) 1978-11-09
DE2352085C3 (de) 1979-07-12
DE2352085A1 (de) 1974-04-18
CA976875A (en) 1975-10-28

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