US3509910A - Submergible wellhead valve and control system - Google Patents

Submergible wellhead valve and control system Download PDF

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Publication number
US3509910A
US3509910A US768018A US3509910DA US3509910A US 3509910 A US3509910 A US 3509910A US 768018 A US768018 A US 768018A US 3509910D A US3509910D A US 3509910DA US 3509910 A US3509910 A US 3509910A
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United States
Prior art keywords
wellhead
fluid
valve
hydraulic fluid
hydraulic
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Expired - Lifetime
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US768018A
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English (en)
Inventor
Norman A Nelson
Jerry B Tomlin
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ACF Industries Inc
Cooper Industries LLC
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ACF Industries Inc
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Publication of US3509910A publication Critical patent/US3509910A/en
Assigned to JOY MANUFACTURING COMPANY reassignment JOY MANUFACTURING COMPANY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ACF INDUSTRIES, INCORPORATED A NEW JERSEY CORP
Assigned to COOPER INDUSTRIES, INC. reassignment COOPER INDUSTRIES, INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: JOY MANUFACTURING COMPANY
Anticipated expiration legal-status Critical
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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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/02—Surface sealing or packing
    • E21B33/03—Well heads; Setting-up thereof
    • E21B33/035—Well heads; Setting-up thereof specially adapted for underwater installations
    • E21B33/0355—Control systems, e.g. hydraulic, pneumatic, electric, acoustic, for submerged well heads
    • 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
    • E21B33/02—Surface sealing or packing
    • E21B33/03—Well heads; Setting-up thereof
    • E21B33/035—Well heads; Setting-up thereof specially adapted for underwater installations
    • E21B33/038—Connectors used on well heads, e.g. for connecting blow-out preventer and riser
    • 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
    • E21B34/00—Valve arrangements for boreholes or wells
    • E21B34/02—Valve arrangements for boreholes or wells in well heads
    • E21B34/04—Valve arrangements for boreholes or wells in well heads in underwater well heads
    • 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
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/14—Obtaining from a multiple-zone well
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/402—Distribution systems involving geographic features
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87153—Plural noncommunicating flow paths
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/9029—With coupling

Definitions

  • Submerged wellhead assemblies adapted for hydraulic control may be actuated through control conduits which extend to platforms located above the surface of the ocean or a hydraulic power source may be located on or adjacent to the wellhead assembly to provide operating fluid under pressure for control of the wellhead valves.
  • Platform control of the submerged power operated equipment is generally preferred when platform completion is commercially feasible.
  • completion on the ocean floor is mandatory, however, it is generally necessary to provide a self-contained power supply system at or adjacent to the submerged valve.
  • the power supply system is connected to the wellhead and a plurality of conduits extend from the power supply to the various valves which are to be operated. It has been found, however, that self-contained systems of this nature are expensive to install and replace and are extremely disadvantageous when servicing is involved.
  • Submerged wellhead systems utilizing self-contained power-pack actuation may also be subject to inadvertent actuation of the wellhead by the control system when the same is being serviced. It is obvious that inadvertent actuation of the wellhead during a servicing procedure could result in the development of a dangerous condition and could possibly result in complete loss of the well.
  • Hydraulic fluid power supply equipment which is attached to a subsea wellhead system, generally requires special guidance systems so that the power supply system may be accurately positioned with respect to the wellhead during installation of the power supply system. Special guidance systems of this sort are extremely expensive in nature and contribute greatly to expensive servicing requirements of the system.
  • a primary object of the present invention to provide an improved subsea Wellhead assembly which includes a self contained hydraulic fluid power supply system which is capable of being electrically or electronically controlled from a remote location to achieve control of a plurality of valves of a subsea wellhead assembly.
  • a novel subsea wellhead valve and control system which includes a self-contained hydraulic fluid power supply system which forms the upper portion of the wellhead valve assembly and is removable from the wellhead for ready access to the well fluid passages when the well is to be serviced.
  • Yet another object of the present invention is to provide a novel subsea wellhead valve and control system which is simple in nature, inexpensive in manufacture and reliable in use.
  • the present invention concerns a wellhead valve assembly including a plurality of wellhead valves which are operated to control the flow of fluid through at least one and preferably a plurality of wellhead flow conduits.
  • Each of the plurality of valves is provided with a hydraulically energized valve operator which is actuated by hydraulic fluid under pressure to achieve movement of the valve to a preselected open or closed position and which is responsive to selective control or loss of hydraulic power to move the internal valve elements to a second preselected open or closed position.
  • the wellhead valve system includes a self-contained hydraulic fluid power supply system which is connected to the upper extremity of the wellhead valve system by means of a quick release collet mechanism.
  • the collet mechanism includes hydraulic fluid supply conduit structure for establishing fluid communication between hydraulic fluid distribution conduits which conduct pressurized hydraulic fluid to the various valve operators for control thereof.
  • the hydraulic fluid power supply system includes a fluid supply reservoir, the upper portion of which is defined by a cylindrical housing and the lower portion of which is defined by the interior portion of the :ollet connector.
  • An electrically energized fluid supply pump is disposed within the fluid supply reservoir with the suction thereof in fluid communication with the reservoir and the discharge portion thereof communicated to the various fluid supply conduits of the system through a number of solenoid actuated valves.
  • the solenoid valves are actuated either by remotely controlled electric circuitry or by remotely supplied electronic signal to achieve selective opening of the various valves to achieve desired selective operation of the wellhead valves.
  • the hydraulic fluid power supply source includes a pressure balancing system to balance the pressure of fluid within the fluid reservoir with the seawater or other external environment in which the system is submerged.
  • the fluid power source also includes an accumulator which is pressurized by the fluid pump and which cooperates with the fluid pump upon opening of a solenoid valve to achieve rapid movement of the valve operators.
  • FIG. 1 is a parital elevational view of the Wellhead assembly of this invention having portions thereof broken away and illustrated in section.
  • FIG. 2 is a sectional view illustrating a valve and valve operator assembly of the wellhead in detail.
  • FIG. 3 is a fragmentary sectional view of the valve and operator assembly of FIG. 2 illustrating the modular hydraulic fluid connection structure thereof in detail.
  • FIG. 4 is a fragmentary sectional view of the valve and valve operator assembly of FIG. 1 illustrating the connection structure between the wellhead valve body and the hydraulic fluid power source.
  • FIG. 1 there is shown a wellhead valve body assembly for a dual completion wellhead having three flow passages 12, 14 and 16 (FIG. I2) extending to two producing zones beneath the surface of the earth.
  • One of the flow passages serves as a fluid return line to allow the circulation of fluids, oil tools, and other devices when the same are forced into and out of the well by fluid pressure.
  • the valve assembly 10 includes a conduit for each of the strings of tubing, each conduitbeing controlled by a series of wellhead valves.
  • One of the wellhead valves 18 has a valve body 46 defining a valve chamber 22 in which is reciprocated a gate member 50.
  • the gate member 50 is provided with a port 51 which is disposed for registry with the flow passage 14 for controlling the flow of fluid through the flow passage.
  • valve operator portion of the assembly illustrated generally at- 52 is connected to the valve body 46 by means of segment clamps 54 which maintain connection flanges on the valve body 46 and an operator base 56 in sealed abutting relation.
  • the valve operator is of the linear hydraulic type including a hydraulic cylinder 58 in which is disposed a movable piston member 60.
  • the piston member 60 is connected by means of a valve stem 62 to the gate member 50 in such manner that reciprocation of the piston member 60 induces reciprocal movement of the gate member between its open and closed positions.
  • a compression spring member 64 is interposed between the piston 60 and the valve operator .base 56 and serves to bias the piston member outwardly away from the valve body.
  • the valve and operator assembly is provided with a hydraulic fluid supply passage system 66 which includes a fluid passage 68 in the valve body and a fluid passage 70 formed in the operator base 56.
  • the passages 68 and 70 are maintained in fluid communication through a connector tube 72 which establishes a sealed bridge between the valve body and operator base when the same are disposed in assembly.
  • Hydraulic fluid from the passage 70 is communicated into a fluid passage defined by a tubular conduit member 74 which connects the operator base passage with a fluid passage 76 formed in the end cap 78 of the hydraulic operator.
  • hydraulic fluid from a hydraulic fluid power source is conducted through the valve and operator passage structure and is introduced into the cylinder 58 outwardly of the piston 60.
  • Introduction of hydraulic fluid into the cylinder 58 outwardly of the piston 60 will cause the piston to move inwardly toward the valve body 46 thereby compressing the spring 64 and causing the valve stem 62 and the gate element 50 to be moved to a position aligning the port 51 in the gate with the production flow passage 14 of the wellhead. assembly.
  • the hydraulic fluid supply system be controlled in such manner as to allow hydraulic fluid to flow freely out of the cylinder 58 and through the hydraulic fluid system 66.
  • the combined eifect of the compression spring 64 and fluid pressure acting through the area defined by the stem 62 causes the stem and piston structure to be positively urged outwardly away from the valve body thereby moving the gate member 50 to its closed position and blocking the flow of fluid through the fluid passage 14 of the wellhead assembly.
  • one of several fluid supply module devices 82 is connected to the valve body 46 by means of a bolt device 80 shown in FIG. 2 and illustrated in detail in FIG. 3.
  • the fluid module 82 of the hydraulic fluid supply system is provided with a transverse connection passage having an internal enlargement 104 defined therein which cooperates with the cylindrical outer surface of the bolt 80 to define an annular chamber 105 surrounding the bolt.
  • Sealing means 106 are provided to establish sealing engagement between the bolt member and the module 82 on each side of the annular enlargement 104 to serve the dual purpose of confining the hydraulic fluid to the annular chamber and preventing contamination of the hydraulic fluid by the external environment.
  • the sealing means 106 may comprise resilient O-ring members such as shown in FIG. 3 or may comprise any other conventional sealing means without departing from the spirit or scope of the instant invention.
  • the bolt member 80 is provided with a fluid passage 108 which establishes fluid communication between the annular chamber 105 and the fluid passage 68 of the hydraulic system 66.
  • a collet connector mechanism illustrated generally at 120 is provided for physically connecting a self-contained hydraulic fluid power supply source to the uppermost portion of the wellhead valve assembly 10.
  • the collet connector 120 is provided with a connection flange 122 which is adapted for intimate sealing engagement with a connection flange 124 formed at the upper portion of the valve body.
  • a plurality of blind sealing members, one for each of the flow passages, are carried by a body portion 130 of the collet connector 120 and are received within enlarged portions of the flow passages 12, 14, and 16 and establish positive sealing engagement to prevent leakage of fluid from the flow passages when the collet connector structure is assembled to the valve body 10. Two of the blind sealing members 126 and 128 are illustrated in FIG. 4.
  • a plurality of movable segment clamps 132 are loosely carried by the collet connector 120 and in the assembled condition of the collet connector as illustrated in FIG. 4 function to bias the flanges 122 and 124 into intimate sealing engagement.
  • a frusto-conical surface 134 is formed on the interior of a collet shroud 136 and serves to force the segment clamps 132 into latching engagement with the flanges 122 and 124 thereby latching the segment clamps in the position illustrated in FIG. 4.
  • a release cam surface 138 is formed within the shroud 136 and is disposed for engagement with tail portions 140 of the segment clamps 132. As the shroud member 136 is moved upwardly as viewed in FIG.
  • the release cam surface 138 will engage the tail portions 140 and the segment clamps 132 causing the segment clamps to pivot in such manner as to release the flanges 122 and 124. It is seen, therefore, that movement of the shroud member 136 downwardly will cause locking of the collet connector structure 120 to'the uppermost portion of the wellhead assembly 10, and that reciprocation of the collet connector shroud 136 upwardly will effect release of the collet connector from the wellhead valve assembly 10.
  • Pressurized hydraulic fluid is communicated to the hydraulic actuation chambers 148 and 150 through hydraulic fluid supply conduits 158 and 160 which are formed within the collet body 130. Hydraulic fluid under pressure, forced into the upper hydraulic actuation chamber 148 through the conduit 158, will act against the shoulder 142 of the shroud 136 and will force the shroud downwardly with respect to the collet body 130. Downward movement of the shroud relative to the collet body cause clamping and locking of the segment clamps 132 to the annular flanges 122 and 124 in the manner discussed above.
  • the interior walls of the collet body 130 define the lower portion of a hydraulic fluid reservoir 162 which serves as a reservoir for hydraulic fluid.
  • a connector plate 164 is fixed to the upper portion of a collet body 130 by means of bolts 166 and is provided with av peripheral flange 168 which is retained in intimate sealed engagement with the lower flange 170 of a cylindrical housing 172 by a clamp member 171.
  • a closure member 174 is connected to the housing 172 by means of a clamp member 176 and is provided at its upper extremity with a bell-mouth guide portion 178 which serves as a guide for installation and retrieval tools which are lowered into engagement therewith.
  • a connector pin 180 is fixed centrally of a circular wall 182 which forms the closure plate of the closure member 174.
  • the cylindrical housing 172 is provided with a series of perforations 184 which allow seawater or any other environment in which the wellhead valve system is submerged to pass therethrough.
  • the upper portion of the reservoir 162 is separated from the seawater by a flexible membrane 186 which is capable of expanding and contracting due to volumetric changes within the fluid reservoir 162.
  • the flexible membrane 186 and the apertures 184 assure that the internal pressure of the fluid within the reservoir 162 will always be balanced with the hydrostatic head of the seawater in which the system is submerged.
  • a fluid pump 188 is connected by brackets 190 to the upper portion of the connector plate 164 and is energized by means of an electric motor 192.
  • the suction of the pump 188 is disposed in fluid communication with the interior of the reservoir 162.
  • the pump 188 is provided with a discharge conduit 194 which comprises a manifold to which is connected a series of hydraulic fluid supply conduits 196 including solenoid actuated valves 198 for controlling the flow of fluid therethrough.
  • solenoid actuated valves 198 for controlling the flow of fluid therethrough.
  • only one conduit and solenoid valve is illustrated in FIG. 1 of the drawings, but it is to be understood that a number of solenoid valves will be disposed in fluid communication with the discharge manifold 194 of the pump 188.
  • a plurality of fluid conduits 200 are formed in the connector body 130 and are disposed in registry with a plurality of corresponding hydraulic fluid distribution conduits 202 formed in the upper extremity of the wellhead valve body 10.
  • the conduits 202 are disposed in fluid communication with the plurality of conduits 204 one extremity of each of the conduits being threadedly received within the outer threaded extremities of the fluid passages 202.
  • the conduits 204 are communicated with a fluid supply input module 206 which forms the upper extremity of a fluid distribution system.
  • a plurality of fluid transfer conduits 208 depend from the input module 206 and transfer hydraulic fluid under pressure to various distribution modules, one of which is illustrated at 82 in FIG. 1. Pressurized hydraulic fluid from the fluid supply system upon reaching the modules 82 will be transmitted into the various valve and hydraulic actuator assemblies for selective control thereof.
  • the solenoid valves 198 may be actuated either by electrical circuitry 199 which extends from a remotely located control facility to the wellhead assembly or by electric current controlled by remotely transmitted signals from the control facility.
  • the control facility may be located on the shore or it may be situated on a floating or rigid control platform at the surface of the ocean.
  • the valves of a subsea wellhead may be controlled by means of electric power which is supplied by a battery 210 connected to the upper extremity of the wellhead.
  • the storage battery 210 may be continuously recharged by a trickle current transmitted from a remotely located source of electrical energy.
  • a protective cover 212 encloses the curved conduits 204 and serves to .protect the conduits from external damage.
  • the protective cover 212 is connected to the wellhead by means of bolts 214 which are received within the input module 206 or which extend through the input module 206 and are received within bosses 215 formed on the wellhead body.
  • signal receiving apparatus 216 For electronic actuation of a solenoid valve 198, signal receiving apparatus 216 is fixed to the hydraulic fluid supply source.
  • the signal receiving apparatus 216 may be equipped to receive sonar signals, electronic-impulse signals or electrical signals from remote sources and through logic circuitry,.with which the signal receiving apparatus is equipped, transmits electrical signals for energization of a selected one or more solenoid valves'198 thereby causing hydraulic fluid under pressure to be transmitted to a selected one of the valve operators for operation of the same as discussed above.
  • the signal receiving apparatus may be disposed within the fluid reservoir to protect it from external damage.
  • an accumulator 220 is connected to the hydraulic fluid supply system by a conduit 221 which is disposed in fluid communication with the discharge manifold 194 of the pump 188.
  • a compressible fluid such as air or dry nitrogen is disposed within the accumulator 220 and is compressed by hydraulic fluid forced therein by the hydraulic pump 188.
  • the electric motor 192 will be deenergized by pressure responsive electrical circuitry when fluid pressure within the accumulator reaches a predetermined maximum value such as 1800 p.s.i., for example.
  • the solenoid valves 198 Upon actuation of any one or more of the solenoid valves 198, the motor 192 will be energized and the pump 188 will begin to pump fluid through the discharge manifold 194.
  • pressure within the accumulator 220 is conducted through the solenoid valves 198 through the passages 200 and to the hydraulic distribution system of selected valve and operator assemblies to assist the pump in operation of the selected wellhead valves.
  • the accumulator likewise may be disposed within the housing defining the fluid reservoir 162.
  • the wellhead valve and valve operator assembly may be installed with the hydraulic power supply system in attachment therewith or may be installed with the power supply system detached and with the flow passages 12, 14, and 16 in an open position as desired.
  • the hydraulic fluid power supply system may be lowered into engagement with the uppermost portion of the wellhead valve body 10 utilizing the same guidance system for lowering as is utilized for lowering the wellhead valve and operator assembly.
  • the shroud 136 of the collet connector structure will be located in its upper position and the clamp members 132 will be pivoted upwardly to the unlatched position thereof as indicated above.
  • the hydraulic fluid supply source is readily removed from the wellhead body 10 simply by introducing hydraulic fluid under pressure into the lower hydraulic actuating chamber 150 causing the shroud 136 to be forced upwardly with respect to the collet body 130. This movement causes the cam surfaces 138 of the shroud to engage the tail portions of the clamp members 132 pivoting the clamp members to the open or unlatched position thereof and effectively releasing the flanges 122 and 124. Suitable lifting apparatus which receives the lifting pin member may then lift the hydraulic fluid power source from the Wellhead body and transport the same to the surface of the ocean for servicing orfor storage until subsequently needed.
  • the blind closure members such as those shown at 126 and 128 in FIG.
  • a unique subsea wellhead assembly which includes a self-contained hydraulic fluid supply system which is capable of being electrically or electronically controlled from a remote location to achieve control of a plurality of wellhead valves in a subsea wellhead system.
  • the hydraulic fluid power supply system of my invention is connected at the upper extremity of the wellhead valve body in such manner as to form a closure for a plurality of fluid passages formed within the wellhead valve body so that the power supply source effectively forms the upper extremity of the wellhead.
  • a submergible wellhead valve assembly comprising a wellhead valve body having a plurality of fluid flow passages formed therein, said valve body having at least one valve for each of said fluid flow passages, each of said valves having a hydraulically actuated valve operator for controlling opening and closing thereof to control the flow of fluid through said fluid flow passages, a self-contained electrically energized fluid power source defining the upper extremity of said wellhead valve assembly, said fluid power source comprising a housing defining a fluid reservoir, said reservoir being filled with hydraulic fluid, pump means disposed within said reservoir and having the suction opening thereof disposed in fluid communication with said reservoir, said pump having a discharge manifold and being capable of producing hydraulic fluid under pressure when energized, said power source having a plurality of hydraulic fluid supply conduits disposed in fluid communication with said discharge manifold, control valve means for selectively controlling the flow of hydraulic fluid through said hydraulic supply conduits, a plurality of fluid distribution conduits being in fluid communication with said valve operators and with said fluid supply conduits whereby selective actuation
  • said means releasably connecting said fluid power source and said wellhead valve body comprising a plurality of segment clamps receiving the lower extremity of said fluid power source and the upper extremity of said wellhead valve body, cam means engaging said segment clamps and moving the same from an unlatched position thereof to a latched position where said segment clamps bind said fluid power source to said Wellhead valve body.
  • said means releasably connecting said fluid power source and said wellhead valve body comprising a first flange formed on said fluid power source and a second flange formed on the wellhead valve body, a plurality of segment clamps carried by said fluid power source, a movable clamp actuation member carried by said fluid power source and being capable of moving said segment clamps between a latched position where said clamps bind said flanges into intimate sealed engagement and an unlocked position where said clamps release said flanges, whereby said fluid power source may be disconnected from said wellhead valve body upon selective movement of said clamp actuation member.
  • a submerged wellhead assembly as set forth in claim 10 closure means carried by said fluid power source and being received in sealed engagement within the flow passages of said wellhead valve body, said closure means being removed from said flow passages upon removal of said fluid power source from said wellhead valve body, thereby exposing said flow passages for servicing.
  • a self-contained hydraulic fluid power source for a submergible wellhead having a plurality of flow passages formed therein and having a plurality of hydraulically energized valves for controlling the flow of fluid through said flow passages, said Wellhead valve body having a connecting flange at the upper extremity there of and having a plurality of hydraulic fluid distribution conduits extending from said connecting flange to said hydraulically energized valves, said fluid power source comprising a collet body having a connecting flange formed at the lower extremity thereof, a plurality of segment clamps being movably disposed about said collet body, a shroud member disposed about said collet body and engaging said segment clamps and in the latched position thereof biasing said segment clamps into portion securing said connecting flanges into sealed assembly, means for selectively moving said shroud member, housing means connected to said collet body and c0- operating with said collet body to define a hydraulic fluid reservoir, hydraulic fluid disposed within said reservoir, pump means disposed within
  • a self-contained hydraulic fluid power source as set forth in claim 12, means maintaining the pressure as said hydraulic fluid within said reservoir in a balanced condition with the hydrostatic head of the medium in which said fluid power source is submerged.

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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)
  • Fluid-Pressure Circuits (AREA)
  • Earth Drilling (AREA)
US768018A 1968-10-16 1968-10-16 Submergible wellhead valve and control system Expired - Lifetime US3509910A (en)

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US76801868A 1968-10-16 1968-10-16

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US (1) US3509910A (enExample)
AT (1) AT296918B (enExample)
BR (1) BR6913163D0 (enExample)
DE (1) DE1950776A1 (enExample)
ES (1) ES371596A1 (enExample)
FR (1) FR2020796A1 (enExample)
GB (1) GB1274692A (enExample)
NL (1) NL6915593A (enExample)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3646962A (en) * 1970-10-16 1972-03-07 Cameron Iron Works Inc Remotely located apparatus for producing well fluids
US4640096A (en) * 1983-11-21 1987-02-03 Societe Nationale Elf Aquitaine (Production) Load carrying connection and hydraulic fluid transmission device
US20070240882A1 (en) * 2006-04-18 2007-10-18 Tauna Leonardi Accumulator for Subsea Equipment
US11434721B2 (en) * 2019-09-05 2022-09-06 Halliburton Energy Services, Inc. Packaging of a diode and SIDAC into an actuator or motor for downhole usage

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4135547A (en) * 1977-03-14 1979-01-23 Baker International Corporation Quick disengaging valve actuator
FR2450938A1 (fr) * 1979-03-09 1980-10-03 Flopetrol Dispositif et procede d'isolement d'une zone souterraine contenant un fluide notamment pour le reconditionnement d'un puits de petrole

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2614803A (en) * 1950-07-18 1952-10-21 Jr Walter Wiggins Submarine drilling and pumping apparatus
US3101118A (en) * 1959-08-17 1963-08-20 Shell Oil Co Y-branched wellhead assembly

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2614803A (en) * 1950-07-18 1952-10-21 Jr Walter Wiggins Submarine drilling and pumping apparatus
US3101118A (en) * 1959-08-17 1963-08-20 Shell Oil Co Y-branched wellhead assembly

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3646962A (en) * 1970-10-16 1972-03-07 Cameron Iron Works Inc Remotely located apparatus for producing well fluids
US4640096A (en) * 1983-11-21 1987-02-03 Societe Nationale Elf Aquitaine (Production) Load carrying connection and hydraulic fluid transmission device
US20070240882A1 (en) * 2006-04-18 2007-10-18 Tauna Leonardi Accumulator for Subsea Equipment
US7628207B2 (en) * 2006-04-18 2009-12-08 Schlumberger Technology Corporation Accumulator for subsea equipment
US20100012327A1 (en) * 2006-04-18 2010-01-21 Schlumberger Technology Corporation Accumulator for subsea equipment
US20100071907A1 (en) * 2006-04-18 2010-03-25 Schlumberger Technology Corporation Accumulator for subsea equipment
US7984764B2 (en) 2006-04-18 2011-07-26 Schlumberger Technology Corporation Accumulator for subsea equipment
US8002041B2 (en) 2006-04-18 2011-08-23 Schlumberger Technology Corporation Accumulator for subsea equipment
US11434721B2 (en) * 2019-09-05 2022-09-06 Halliburton Energy Services, Inc. Packaging of a diode and SIDAC into an actuator or motor for downhole usage

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Publication number Publication date
ES371596A1 (es) 1972-03-16
BR6913163D0 (pt) 1973-02-08
NL6915593A (enExample) 1970-04-20
FR2020796A1 (enExample) 1970-07-17
GB1274692A (en) 1972-05-17
DE1950776A1 (de) 1971-04-15
AT296918B (de) 1972-03-10

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