WO1997038226A1 - Dispositif et procede pour sortir des fluides de puits souterrains - Google Patents

Dispositif et procede pour sortir des fluides de puits souterrains Download PDF

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Publication number
WO1997038226A1
WO1997038226A1 PCT/US1997/004787 US9704787W WO9738226A1 WO 1997038226 A1 WO1997038226 A1 WO 1997038226A1 US 9704787 W US9704787 W US 9704787W WO 9738226 A1 WO9738226 A1 WO 9738226A1
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WO
WIPO (PCT)
Prior art keywords
valve
gas
housing
vent
chamber
Prior art date
Application number
PCT/US1997/004787
Other languages
English (en)
Inventor
Mohammad Amani
Original Assignee
Enhanced Gas Recovery Company
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
Priority claimed from US08/692,592 external-priority patent/US5806598A/en
Application filed by Enhanced Gas Recovery Company filed Critical Enhanced Gas Recovery Company
Priority to CA002254722A priority Critical patent/CA2254722C/fr
Priority to AU25444/97A priority patent/AU2544497A/en
Publication of WO1997038226A1 publication Critical patent/WO1997038226A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
    • E21B43/121—Lifting well fluids
    • E21B43/122—Gas lift
    • E21B43/123—Gas lift valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F1/00—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped
    • F04F1/06—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium acting on the surface of the liquid to be pumped
    • F04F1/08—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium acting on the surface of the liquid to be pumped specially adapted for raising liquids from great depths, e.g. in wells

Definitions

  • the invention relates to a method and apparatus for removing fluids from hydrocarbon producing wells to improve production and, more particularly, to a gas operated pump for pumping fluids from a producing formation to the surface, and still more particularly to an improved valve for a gas operated pump.
  • prior art gas operated pumps operate by injecting pressurized gas into a subsurface chamber to force formation liquids to the surface through a U-shaped tube and venting the gas from the chamber to allow the chamber to refill with liquids.
  • these pumps include the following additional elements: a first check valve that allows one-way entry of formation liquids into the chamber; flow tubing extending from the chamber to the surface through the well bore; a second check valve to prevent the downward flow of liquid from the flow tubing into the chamber; gas supply tubing for delivering pressurized gas to the chamber; an injection control valve for controlling the input of gas into the chamber; and a vent valve for controlling the venting of gas from the chamber.
  • U.S. Patents 660,545, 3,617,152 and 4,427,345 describe techniques utilizing the forces of pressurized gas and springs to open and close the injection control valve and vent valve.
  • the force of the gas causes the injection control valve to open and the vent valve to close.
  • the spring force closes the injection control valve and opens the vent valve.
  • U.S. Patent 4,405,291 describes actuating the injection control valve and vent valve by the upward and downward movement of a piston located within the pump chamber.
  • the piston moves downwardly by the force of the pressurized gas and upwardly by the force of formation liquids filling the pump chamber.
  • the injection control valve is actuated by the force of the pressurized gas and the vent valve is opened and closed by a subsurface actuator, which responds to hydraulic pressure transmitted through one or more hydraulic control lines extending from the surface.
  • valves are actuated by the pump's pressurized gas, by formation fluids or by springs, none of which can be precisely controlled from the surface.
  • many prior art devices use the pump's pressurized gas to actuate either or both valves.
  • the deeper the well the greater the quantity of gas which is necessary to overcome the differential pressure in the gas supply line to open the valve. For wells deeper than a few hundred feet, substantial quantities of pressurized gas are needed.
  • to close a valve that is opened by the force of pressurized gas it is necessary to vent or bleed the gas line to release the pressure on the valve.
  • the present invention overcomes the deficiencies of the prior art. SUMMARY OF THE INVENTION
  • the apparatus of the present invention includes a supply valve having an open supply position to supply gas to a downhole accumulation chamber and a closed supply position, a vent valve having an open vent position to vent gas from the chamber and a closed vent position, and an actuator communicating with a pressurized fluid source at the surface for actuating the valves.
  • the actuator moves the supply valve to the open supply position and the vent valve to the closed vent position, and alternately moves the vent valve to the open vent position and the supply valve to the closed supply position.
  • the actuator may include one or two hydraulically actuated reciprocating members, each reciprocating member having a slidably movable piston disposed within a cylinder. A pair of biasing members for biasing each valve in either the open or closed position, respectively, may be included.
  • each end of the reciprocating member is associated with one of the valves.
  • hydraulic fluid is alternately injected from the surface into the cylinder above and below the piston, forcing the reciprocating member to reciprocate.
  • the supply valve is opened and the vent valve is permitted to close, allowing pressurized gas to be inserted from the surface to displace fluids in the accumulation chamber.
  • the vent valve is opened and the supply valve is closed, allowing gas from the accumulation chamber to be vented through the apparatus.
  • the terminal end of the first reciprocating member is associated with the supply valve, while the terminal end of the second reciprocating member is associated with the vent valve.
  • the injection of hydraulic fluid into the cylinder on one side of each reciprocator piston causes the reciprocating members to move in opposite directions. This forces the supply valve to open and permits the vent valve to close, allowing the insertion of pressurized gas into the chamber.
  • the release of hydraulic pressure in the actuator allows the reciprocating members to move back to their original positions, opening the vent valve and permitting the supply valve to close. This allows the venting of the chamber.
  • a conduit may be connected to the actuator opposite the hydraulically pressurized side of the piston of each reciprocating member, providing a constant hydrostatic pressure thereto. This force will encourage movement of the reciprocating members in the second direction as described above. This hydrostatic pressure also allows enhanced control of the operation of the assembly by constantly providing a force opposite the hydraulic force.
  • the present invention thus provides an improved apparatus and method for use with a gas pump and well tubing for removing fluid from underground wells that does not rely on the use of the pump's pressurized gas for valve actuation. Further, valve actuation with the present invention can be controlled from the surface, improving efficiency and effectiveness. Other objects, features and advantages of the present invention will be apparent from the drawings, the specifications and the claims. BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a cross-sectional schematic view of a first embodiment of an improved hydraulic valve assembly for a gas operated fluid pump
  • FIG. 2 is an elevational schematic view showing the valve assembly of FIG. 1 as a component of a gas operated pump with the accumulation chamber filled with formation liquids;
  • FIG. 3 is an elevational schematic view showing high pressure gas flowing into the gas accumulation chamber, forcing the accumulated formation liquids up the flowbore of a tubing string to the surface;
  • FIG. 4 is elevational schematic view showing the accumulation chamber filled with high pressure gas
  • FIG. 5 is an elevational schematic view showing the high pressure gas venting from the accumulation chamber and the accumulation chamber filling with formation liquids;
  • FIG. 6 is a cross-sectional schematic view of a second embodiment of an improved valve assembly for a gas operated pump
  • FIG. 7 is an elevational schematic view showing the valve assembly of FIG. 6 in use with a gas operated pump
  • Fig. 8 is an elevational schematic view showing a gas operated pump having an improved valve assembly with a pair of hydraulic input lines concentrically disposed within a gas supply line.
  • a hydrocarbon producing well 10 having a conventional casing 12 with perforations 14, providing fluid communication between the producing formation 16 and the flowbore 18 of casing 12.
  • a tubing string 20 extends from the surface down through the flowbore 18 of casing 12. The hydrocarbons produced by the formation flow to the surface through a flowbore 46 in the tubing string 20.
  • a pressure vessel 24 is used to store and supply high pressure gas.
  • the source for the high pressure gas can be a high pressure gas producing well, or a gas sales line.
  • a compressor 26 compresses the gas from well 10, or from other gas sources, into the high pressure gas vessel 24 to maintain the required pressurized gas volume.
  • FIG. 2 further illustrates a gas operated pump 30 disposed at the lower end of the tubing string 20.
  • the pump 30 includes an accumulation chamber 34 for the accumulation of formation fluids, a bypass passageway 32, and a valve assembly 40 of the present invention.
  • the accumulation chamber 34 includes a one-way valve such as a check valve 36 at its lower terminal end 38.
  • the one-way valve 36 allows formation fluids to flow into the accumulation chamber 34 through an aperture 37 and prevents the accumulated fluids from flowing back out of accumulation chamber 34 through the aperture 37 in the lower terminal end 38 of the chamber 34.
  • the bypass passageway 32 extends from an outlet 42 proximate to the lower terminal end 38 of the chamber 34, and extends around the chamber 34 and the valve assembly 40 to an inlet aperture 44 for communicating with the lower end of the flowbore 46 of the tubing string 20.
  • a one-way valve 47 is disposed in the bypass passageway 32 at the lower end thereof to allow flow upwardly through the bypass passageway 32, but closing the passageway 32 to downward flow back into the accumulation chamber 34.
  • Another check valve (not shown) may be added at the inlet 44 to prevent sand or other debris from settling in the bypass passageway 32 when the pump 30 is shut down.
  • the valve assembly 40 includes a valve housing 50 and a side bore, or flowway, 52.
  • the side bore or flowway 52 shown as an integral part of the housing 50, communicates with the accumulation chamber 34 of the pump 30 via an aperture 64.
  • the housing 50 includes an inlet chamber 54 for receiving high pressure gas, a first or upper communication chamber 56 in fluid communication with the inlet chamber 54, an enclosure or cylinder 58, an outlet chamber 60 for venting high pressure gas, and a second or lower communication chamber 62 in fluid communication with the outlet chamber 60.
  • the upper and lower communication chambers 56, 62 are each also in fluid communication with the side bore 52.
  • the side bore 52 has an inlet 68 into upper communication chamber 56 and an outlet 66 into lower communication chamber 62.
  • Pressurized gas is supplied to the inlet chamber 54 of the valve assembly 40 through an inlet port 78 from a gas supply line 80 extending from the pressure gas vessel 24.
  • a gas inlet, or injection control, valve 70 is disposed between the inlet chamber 54 and the upper communication chamber 56 to control the inflow of pressurized gas into the flowway 52 for forcing formation fluids from the accumulation chamber 34 into the tubing string 20.
  • the injection control valve 70 is movable between open and closed positions and may be any among a variety of conventional gas valves.
  • the valve 70 includes a valve closure member 74 that is sealably enagageable with a valve seat 72, and a surface 73 for engagement with an actuation mechanism 109, as will be described further below.
  • a resilient urging means, such as a spring 76 may be included for biasing the closure member 74 to the closed position in sealing engagement with the valve seat 72.
  • the valve assembly 40 also includes a gas vent valve 90 disposed between the outlet chamber 60 and the lower communication chamber 62.
  • the vent valve 90 is movable between open and closed positions and may take the same general form as the injection control valve 70.
  • the vent valve 90 shown in FIG. 1 includes a valve closure member 94 that is sealably enagageable with a valve seat 92, and has a surface 93 for engagement with the actuation mechanism 109.
  • a resilient urging means such as a spring 96, may be included for biasing the closure member 94 to the closed position in sealing engagement with the valve seat 92.
  • the vent valve 90 permits the exhaust or venting of gas from the accumulation chamber 34 and the valve assembly 40 through a vent port 98 in the outlet chamber 60.
  • the vent port 98 communicates with a vent line 100 which extends into an annulus 22 between the tubing string 20 and the casing 12.
  • the exhausted gas can be directed into a collection vessel (not shown) from the outlet chamber 60.
  • the valve assembly 40 also includes an actuator 109 associated with a hydraulic input mechanism for actuating the inlet control valve 70 and the vent valve 90.
  • the actuator 109 When connected to a hydraulic source 25 located above ground via a hydraulic input mechanism, the actuator 109 and thus the actuation of the valves 70, 90 may be controlled from the surface.
  • one phase of operation of the actuator 109 causes the input control valve 70 to open and the vent valve 90 to close, while another phase causes the opposite valve movements.
  • the valve assembly 40 can thus be operated with little or no time lag between the opening of one valve and the closing of the other valve to effect efficient pumping of fluid from the accumulation chamber 34.
  • a single reciprocating member 1 10 is disposed within the enclosure, or cylinder, 58.
  • the reciprocating member 110 includes a stem 112 with ends 124, 122 extending through apertures 114a, 116a in the end walls 114, 116 of the cylinder 58, respectively.
  • Seals 115 and 117 may be mounted, or encased, within apertures 114, 116, respectively, to provide a fluid seal about the stem 1 12 as it reciprocates therein, as will be described below.
  • the stem 112 extends between the injection control valve 70 and the vent valve 90 whereby the terminal ends 124, 122 of the stem 112 are adapted to engage the engagement surfaces 73, 93 of valves 70, 90, respectively, to open one or the other of the valves 70, 90 upon reciprocation within the enclosure or cylinder 58.
  • the reciprocating member 110 has a piston 113 that slideably, sealably engages the inner wall 59 of the cylinder 58, effectively dividing the cylinder 58 into first and second sides or cells 58 A, 58B.
  • the reciprocating member is driven by hydraulic pressure from a hydraulic input mechanism.
  • the hydraulic input mechanism includes input conduits 118, 120 connected with a hydraulic source 25.
  • the first hydraulic input conduit 118 communicates with the first side 58A of the cylinder 58 through a port 58C.
  • the second hydraulic input conduit 120 extends from the hydraulic source 25 to a port 58D in the second side 58B of the cylinder 58.
  • the first side 58A is pressurized, forcing the piston 113 and, thus, the reciprocating member 110 to move downwardly within the cylinder 58.
  • the lower terminal end 122 of the stem 112 engages the engagement surface 93 of the vent valve 90, thereby compressing the second resilient urging means 96 and unseating the closure member 94 from the valve seat 92 to open the vent valve 90.
  • This then allows gas to vent from the lower communication chamber 62 through the outlet chamber 60 and out of the valve assembly 40 via the vent port 98. Gas is thus released into the annulus 22 through the vent line 100, or otherwise directed into a collection vessel as desired.
  • supply side upon pressurization of the second hydraulic input conduit 120, supply side
  • the enclosure 58B of the enclosure 58 is pressurized, causing the reciprocating member 110 to move upwardly so that the upper terminal end 124 of the stem 112 engages the engagement surface 73 of the closure member 74.
  • the closure member 74 unseats from the valve seat 72 and allows gas to flow from gas supply line 80 through the inlet chamber 54 and into upper communication chamber 56.
  • the other valve 70, 90 is closed by the force of the resilient urging means 76, 96, respectively, without having to overcome any differential pressure in the system.
  • FIG. 2 illustrates the accumulation chamber 34 filled with formation liquids.
  • the accumulated liquids are pumped from the accumulation chamber 34 by the valve assembly 40 by applying hydraulic pressure through conduit 120 (FIG. 3).
  • the reciprocating member 1 10 is thus moved upwardly such that the upper terminal end 122 engages the engagement surface 73 of the injection control valve 70 to open the valve 70.
  • Gas from the supply line 80 and the inlet chamber 54 then passes into upper communication chamber 56, through port 68 and, as shown in FIG. 3, down side bore 52 and into the accumulation chamber 34.
  • the high pressure gas forces the accumulated formation liquids through outlet 42, into bypass passageway 40 and up to flowbore 46 of the tubing 20.
  • the accumulated formation liquids cannot pass out of the aperture 37 of the chamber 34 due to the one-way valve 36 closing the lower end 38 of chamber 34 to the formation.
  • the hydraulic pressure in the conduit 120 can be reduced and the pressure in the conduit 118 increased, causing the reciprocating member 110 to move downwardly to open the vent valve 90 and allow injection control valve 70 to close as previously described.
  • gas in the accumulation chamber 34 is allowed to vent upwardly through the communication chamber 62, the outlet chamber 60 and into the vent line 100 (FIG. 5).
  • formation liquids are allowed to flow through the one-way valve 36 to again fill the accumulation chamber 34 with formation fluids. Any formation gas that enters the accumulation chamber 34 is pumped out with the pressurized gas. The above procedure is repeated as required to pump formation fluids to the surface.
  • valve assembly 40 of the present invention for use with a gas operated pump, such as pump 30, is shown in FIGS. 6 and 7.
  • Valve assembly 40 operates as a component of the pump 30 similar to the embodiment of the invention shown in FIGS. 2-5 with respect to the accumulation chamber 34, the bypass passageway 32, the pressurized gas source 24 and the hydraulic pressure source 25, except as noted below.
  • the valve assembly 40 includes a valve housing 50 with a flowway, or side communication passageway, 52.
  • the housing 50 also includes an inlet chamber 54 for receiving high pressure gas, an upper communication chamber 56 communicating with the flowway 52, an upper enclosure or cylinder 200, a lower enclosure or cylinder 202, an outlet chamber 60 for venting gas, and a lower communication chamber 62 also communicating with the flowway 52.
  • the flowway 52 communicates with the upper terminal end of the accumulation chamber 34 at an aperture 64 and includes an outlet 66 into lower communication chamber 62 and an inlet 68 into the upper communication chamber 56.
  • a first, or injection control, valve 70 is disposed between the inlet chamber 54 and the upper communication chamber 56.
  • Injection control valve 70 includes a valve seat 72, a valve closure member 74, and a resilient urging means, such as a spring 76, for biasing the closure member 74 into the closed position in sealing engagement with the valve seat 72.
  • the inlet chamber 54 includes an inlet port 78 connected to a gas supply line 80, which extends to the surface and is connected to high pressure gas vessel 24 (FIG. 7). High pressure gas vessel 24 supplies high pressure gas through the supply line 80 to the inlet chamber 54, similarly as described with respect to the embodiment of the FIG. 1.
  • a second, or vent, valve 90 is disposed between the vent chamber 60 and the lower communication chamber 62.
  • the vent valve 90 similarly includes a seat 92, a closure member 94 and a resilient urging means or spring 96. As will be described further below, the spring 96 biases the closure member 94 into the open position.
  • the outlet chamber 60 includes a vent port 98 which communicates with a vent line 100, which may extend into the annulus 22 for venting the gas (FIG. 7).
  • a first reciprocating member 210 is disposed within the upper cylinder 200.
  • the reciprocating member 210 includes an elongate portion, or actuator stem, 212, which extends through an aperture 214 in an end wall 201 of the upper cylinder 200.
  • the actuator stem 212 is associated with, or connected to, the closure member 74 of the injection control valve 70. Thus, upon upward movement of the reciprocating member 210, the actuator stem 212 moves the valve closure member 74 to its open position.
  • a second reciprocating member 220 is disposed within the lower cylinder 202.
  • the reciprocating member 220 includes an actuator stem 222, which extends through an aperture 224 in an end wall 203 of the cylinder 202.
  • the actuator stem 222 is associated with, or connected to, the closure member 94 of the vent value 90. Upon downward movement of the reciprocating member 220, the actuator stem 222 moves the closure member 94 into its closed position.
  • Each reciprocating member 210, 220 has a piston portion 211, 221 that slideably, sealably engages the wall of each respective cylinder, dividing it into two cells.
  • the stopper portion 211 divides the first cylinder 200 into a first, or supply cell 200A and a second, or vent, side 200B.
  • the piston 221 divides the cylinder 202 into a first, or supply, cell 202A and a second or vent cell 202B.
  • a hydraulic supply conduit 120 extends from the surface and connects to the first or supply cells 200A, 202A of the cylinders 200, 202 at ports 200C and 202C, respectively.
  • the supply cells 200A, 202A are pressurized, causing the second reciprocating member 220 to move downwardly within the cylinder 202 and the first reciprocating member 210 to move upwardly in the cylinder 200.
  • the actuator stem 222 moves the valve closure member 94 downwardly, compressing the spring 96 and seating the closure member 94 upon the valve seat 92 to close the vent valve 90. This prevents gas from flowing through the valve assembly 40 from the accumulation chamber 34.
  • the actuator stem 212 moves the closure member 74 upwardly, compressing the spring 76 and unseating the closure member 74 from the valve seat 72.
  • high pressure gas is permitted to flow from the gas supply line 80 through the inlet chamber 54 and into the upper communication chamber 56.
  • the high pressure gas passes through the inlet 68, down flowway 52 and into the upper end of the accumulation chamber 34, forcing accumulated formation liquids into the bypass passageway 32 and up the flow bore 46 of the tubing 20 (FIG. 7).
  • the hydraulic pressure in supply line 120 can be reduced to allow the resilient urging means 76, 96 to expand. This will force the first reciprocating member 210 downwardly, seating the valve closure member 74 upon the valve seat 72, and the second reciprocating member 220 upwardly, unseating the valve closure member 94 from the valve seat 92.
  • a hydrostatic conduit 230 connecting the vent cells 200B, 202B of each cylinder with the tubing string flowbore 46 may be included. In the preferred embodiment of FIGS.
  • hydrostatic conduit 230 connects the cells 200B, 202B of the cylinders 200 and 202, respectively, with the flowbore 46 of the tubing string 20 at a port 240 in the tubing string 20 above the valve assembly 40.
  • the conduit 220 thus provides fluid communication between the tubing string 20 and the vent cells 200B, 202B, such that the hydrostatic weight of fluid in the flowbore 46 above the valve assembly 40 exerts fluid pressure against the pistons 211, 221 opposite the hydraulic pressure in the first cells 200A, 202A.
  • This force on one side of each piston 211, 212 allows enhanced operational control of the valve assembly 20 because the opposing hydraulic force can be controlled from the surface.
  • the injection control valve 70 closes, the input of pressurized gas from the supply line 80 is reduced.
  • valve assembly 40 can be actuated by controlling hydraulic pressure in a single line. The above procedure is repeated as required to pump formation liquids to the surface.
  • FIG. 8 illustrates the pump 30 and valve assembly 40 having hydraulic input lines 118, 120 concentrically disposed within the gas supply line 80.
  • an improved technique for installation and removal of the valve assembly 40 may be performed.
  • the hydraulic input lines 118 and 120 are concentrically disposed within the supply line 80 at the surface.
  • the supply line 80 may be conventional coiled tubing (not shown) and the hydraulic input lines 118, 120 may be pre-manufactured or pre-installed therein.
  • the valve assembly 40 is connected to the supply line 80 and the hydraulic input lines 118 and 120.
  • valve assembly 40 and the supply line 80 are then lowered into the tubing string 20, such that the supply line 80 is concentrically disposed within the tubing string 20.
  • This double concentric configuration of the hydraulic input lines 118, 120, supply line 80 and tubing string 20 assists in protecting the lines 80, 118, 120 from damage or malfunctioning that may occur when the lines 80, 118, 120 extend within the annulus 22.
  • the valve assembly 40 can be easily installed and removed with conventional coiled tubing techniques.
  • valve assembly 40 is connected with the accumulation chamber 34, such as by securing the valve assembly within a conventional seating nipple 300 disposed proximate to the accumulation chamber 34.
  • the seating nipple 300 may be any among a variety of commercially available seating nipples compatible for use with the present invention.

Abstract

Dispositif pour amener et ventiler du gaz vers une chambre d'accumulation de fond (34), qui comporte une soupape d'alimentation (70) ayant une position d'alimentation ouverte pour amener du gaz à la chambre (34), et une position d'alimentation fermée; une soupape de respiration (90) ayant une position de ventilation ouverte pour ventiler le gaz venant de la chambre (34), et une position fermée; et un actionneur (109) communiquant avec une source de fluide sous pression (24) à la surface, pour actionner les soupapes d'alimentation (70) et de respiration (90). L'actionneur (109) fait passer la soupape d'alimentation (70) en position ouverte et la soupape de respiration (90) en position fermée, et alternativement fait passer la soupape de respiration (90) en position de ventilation ouverte et la soupape d'alimentation (70) en position d'alimentation fermée. L'actionneur (109) peut comporter un seul élément à va-et-vient hydraulique ou une paire d'éléments à va-et-vient. Quand une paire d'éléments à va-et-vient est utilisée et que le dispositif est employé en connexion avec un train de tubes pourvu d'un trou d'écoulement, la pression hydrostatique venant du trou du train de tubes peut être utilisée pour appliquer de la pression sur un côté de chaque élément à va-et-vient. Le dispositif peut également comporter des éléments de sollicitation qui poussent chaque soupape en position ouverte ou fermée.
PCT/US1997/004787 1996-04-04 1997-03-26 Dispositif et procede pour sortir des fluides de puits souterrains WO1997038226A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA002254722A CA2254722C (fr) 1996-04-04 1997-03-26 Dispositif et procede pour sortir des fluides de puits souterrains
AU25444/97A AU2544497A (en) 1996-04-04 1997-03-26 Apparatus and method for removing fluids from underground wells

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US1485096P 1996-04-04 1996-04-04
US60/014,850 1996-04-04
US08/692,592 1996-08-06
US08/692,592 US5806598A (en) 1996-08-06 1996-08-06 Apparatus and method for removing fluids from underground wells

Publications (1)

Publication Number Publication Date
WO1997038226A1 true WO1997038226A1 (fr) 1997-10-16

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CA (1) CA2254722C (fr)
WO (1) WO1997038226A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1703141A1 (fr) * 2005-03-17 2006-09-20 François Braun Procédé et système d'élévation d'un liquide
CN115142819A (zh) * 2022-06-09 2022-10-04 上海工程技术大学 石油井下伴生气的电液组合驱动加压排出装置及排出方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2336683A (en) * 1940-06-25 1943-12-14 Nat Supply Co Gas lift pump

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2336683A (en) * 1940-06-25 1943-12-14 Nat Supply Co Gas lift pump

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1703141A1 (fr) * 2005-03-17 2006-09-20 François Braun Procédé et système d'élévation d'un liquide
WO2006097519A1 (fr) * 2005-03-17 2006-09-21 Braun Francois Procede et systeme pour lever un liquide
US8137076B2 (en) 2005-03-17 2012-03-20 Francois Braun Method and system for raising a liquid using a pressurised gas and a buoyant, movable interface member
CN115142819A (zh) * 2022-06-09 2022-10-04 上海工程技术大学 石油井下伴生气的电液组合驱动加压排出装置及排出方法

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AU2544497A (en) 1997-10-29
CA2254722A1 (fr) 1997-10-16
CA2254722C (fr) 2003-12-09

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