EP2250340A2 - Appareil de pompage hydraulique de puits de pétrole - Google Patents

Appareil de pompage hydraulique de puits de pétrole

Info

Publication number
EP2250340A2
EP2250340A2 EP09705617A EP09705617A EP2250340A2 EP 2250340 A2 EP2250340 A2 EP 2250340A2 EP 09705617 A EP09705617 A EP 09705617A EP 09705617 A EP09705617 A EP 09705617A EP 2250340 A2 EP2250340 A2 EP 2250340A2
Authority
EP
European Patent Office
Prior art keywords
rod
flow
proximity switch
pump
hydraulic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP09705617A
Other languages
German (de)
English (en)
Inventor
Michael A. Fesi
Willard J. Lapeyrouse
Kenneth H. Vincent
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.)
Petro Hydraulic Lift System LLC
Original Assignee
Petro Hydraulic Lift System LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Petro Hydraulic Lift System LLC filed Critical Petro Hydraulic Lift System LLC
Publication of EP2250340A2 publication Critical patent/EP2250340A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • 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
    • E21B43/126—Adaptations of down-hole pump systems powered by drives outside the borehole, e.g. by a rotary or oscillating drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
    • F04B47/02—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps the driving mechanisms being situated at ground level
    • F04B47/04—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps the driving mechanisms being situated at ground level the driving means incorporating fluid means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
    • F04B9/103—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having only one pumping chamber
    • F04B9/107—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having only one pumping chamber rectilinear movement of the pumping member in the working direction being obtained by a single-acting liquid motor, e.g. actuated in the other direction by gravity or a spring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
    • F04B9/103—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having only one pumping chamber
    • F04B9/107—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having only one pumping chamber rectilinear movement of the pumping member in the working direction being obtained by a single-acting liquid motor, e.g. actuated in the other direction by gravity or a spring
    • F04B9/1073—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having only one pumping chamber rectilinear movement of the pumping member in the working direction being obtained by a single-acting liquid motor, e.g. actuated in the other direction by gravity or a spring with actuation in the other direction by gravity

Definitions

  • LAPEYROUSE Willard, J., a US citizen, of 302 E. Woodlawn Collins Road, Houma, LA 70363, US;
  • PETRO HYDRAULIC LIFT SYSTEM L.L.C. (a Louisiana, US, limited liability company), 15288 Highway 102, Jennings, LA 70546, US. CROSS-REFERENCE TO RELATED APPLICATIONS
  • the present invention relates to oil well pumps and more particularly to an improved hydraulic oil well pump that is electronically controlled using limit or proximity switches to control a valving arrangement that eliminates shock or excess load from the pumping string or sucker rod during pumping, and especially when changing direction of the sucker rod at the bottom of a stroke.
  • the present invention provides a hydraulic oil well pumping apparatus.
  • the system of the present invention utilizes a hydraulic cylinder having a piston or rod that is movable between upper and lower piston positions.
  • a pumping string or sucker rod extends downwardly from the piston, the pumping string or sucker rod being configured to extend into an oil well for pumping oil from the well.
  • a prime mover such as an engine is connected to a compensating type hydraulic pump.
  • a directional control valve moves between open flow and closed flow positions.
  • a hydraulic flow line connects the pump and the hydraulic cylinder.
  • Figure 1 is a schematic diagram of an embodiment of the apparatus of the present invention
  • Figure 2 is a schematic diagram of another embodiment of the apparatus of the present invention
  • Figures 3-4 are elevation views of a preferred embodiment of the apparatus of the present invention showing an alternate construction for the pump cylinder, wherein lines A-A are match lines and figure 4 is taken along lines 4-4 of figure 3;
  • Figure 5 is a fragmentary, sectional elevation view of a preferred embodiment of the apparatus of the present invention taken along lines 5-5 of figure 3;
  • Figure 6 is a partial sectional elevation view of the preferred embodiment of the apparatus of the present invention and showing the alternate construction for the pump cylinder; and Figure 7 is a schematic diagram of another alternate embodiment of the apparatus of the present invention.
  • FIG. 1 shows an embodiment of the apparatus of the present invention, designated generally by the numeral 150.
  • Oil well pump 150 provides a pump (e.g. hydraulic piston pump) 153 that receives hydraulic fluid via a reservoir 151 and intake flow line/filter 152.
  • the hydraulic piston pump 153 is driven by a prime mover (e.g. engine or electric motor).
  • a manifold assembly 154 is shown surrounded by dotted lines in figure 1.
  • the manifold assembly 154 includes various flow lines as shown in figure 1, directional valve 165, proportional flow control valve 171, relief valve 175, and valves 174, 176.
  • a discharge flow line 155 extends from the discharge side of pump 153 to internal manifold tee 157.
  • Check valve 156 can be placed in discharge flow line 155.
  • Valves 161, 171, 174, 175, 176 can be a part of (e.g. internal) manifold 154.
  • flow lines 158, 159 communicate with discharge flow line 155.
  • the flow line 159 extends through flow control valve 164 and to accumulator 160.
  • the accumulator 160 has an oil containing portion 161 and a gas containing portion 162.
  • arrow 163 indicates schematically the level of oil 161 in accumulator 160.
  • Hydraulic cylinder 166 is connected to both accumulator 160 and pump 153 via flow line 158.
  • Hydraulic cylinder 166 includes a cylinder body 167 and an extendable pushrod 168.
  • the pushrod 168 is movable between retracted upper and extended lower positions.
  • the pushrod 168 provides a rod end 169 that is fitted with a coupling (e.g. coupling 20 of the embodiments of figures 1 -42 in Publication No. US 2007/026184 IAl , published 15 November 2007, and in Publication No. WO 2007/090193 A2, published 9 August 2007, both of which are hereby incorporated by reference) which connects the pushrod 168 to a well string such as the pumping string 21 (e.g.
  • a coupling e.g. coupling 20 of the embodiments of figures 1 -42 in Publication No. US 2007/026184 IAl , published 15 November 2007, and in Publication No. WO 2007/090193 A2, published 9 August 2007, both of which are
  • Flow line 170 extends from internal manifold tee 177 through proportional flow control valve 171 to reservoir 178. Reservoirs 151, 178 can be a common reservoir. The flow line 170 can be provided with an oil cooler 172 and filter 173. Excess pressure in the system can be relieved using relief valve 175. Valve 176 is a valve that controls flow of fan/cooler 172. In operation, the prime mover (e.g. engine or electric motor) is started which operates hydraulic pump 153.
  • the prime mover e.g. engine or electric motor
  • the hydraulic pump 153 initiallyrotates ataspeed ofabout 1800 rpm's and is destroked.
  • the hydraulic pump 153 can be a Parker Model Pl 075XS (01 SRM5 AEYOTOOCPB).
  • a pumping cycle begins by giving the hydraulic piston pump 153 a command using a controller (such as the controller 39 described herein in reference to figures 1-42), stroking it to charge accumulator 160.
  • a controller such as the controller 39 described herein in reference to figures 1-42
  • the directional valve 165 is energized, while maintaining the command to the pump 153.
  • Oil 161 is then directed from the charged accumulator 160 through the flow control valve 164 and from the pump 153 into the rod end 168 of the hydraulic cylinder
  • Valve 164 enables free flow in and restricted flow out to control speed of upstroke of cylinder 166.
  • Pushrod 168 will then retract lifting the pumping string until a proximity switch is actuated by a coupling that is mounted on the rod end 169.
  • the controller 39 then de-energizes the directional valve 165 and activates the proportional control valve 171 forcing it to open until the pushrod 168 begins to fall at a desired velocity.
  • the degree of opening of the proportional control valve 171 controls how fast fluid leaves the cylinder body 167 and flows via flow lines 158, 170 through the proportional flow control valve 171 and into reservoir 178.
  • the coupling on the rod end 169 reaches a second proximity switch which is positioned a short distance (e.g. approximately one foot) from the bottom of the travel of the pushrod 168.
  • a current signal to the proportional control valve 171 is decreased, forcing the pushrod 168 to decelerate until the coupling 20 on the rod end 169 of the pushrod 168 reaches a third proximity switch.
  • the electrical signal from the controller 39 will then be removed from the proportional control valve 171, with a voltage signal then being sent by controller 39 to the directional valve 165 while maintaining the command to the pump 153 to continue pumping.
  • Oil 161 returning from the cylinder body 167 through the proportional control valve 171 passes through an oil cooler 172 and filter 173 before reaching reservoir 178.
  • the accumulator 160 will thus have a pressure change of between about five hundred (500) psi depending on sucker rod string load when it has been discharged by transmitting fluid to the cylinder 166 and a maximum pressure value of about three thousand (3,000) psi depending on sucker rod string load when it is fully charged by the pump 153 during that time that the pushrod 168 is extending and cylinder 166 is draining.
  • FIG. 2 shows another embodiment of the apparatus of the present invention designated generally by the numeral 180.
  • Oil well pump 180 is somewhat similar to the embodiment of figure 1 , with the elimination of bypass valve 174, that function now being taken care of by pump 184.
  • the pump 184 is an electronically controlled variable volume pressure compensated positive displacement piston pump such as is available from Parker® (www.parker.com).
  • Pump 184 receives hydraulic fluid via intake flow line/filter 185 and from reservoir 182.
  • a manifold 186 contains various valves 198, 204, 207, 208 that can be internally of manifold 186.
  • Discharge flow line 187 transmits pressurized oil from pump 184 to tees 188, 189.
  • a check valve 190 can be positioned in between the tees 188, 189 in discharge line 187.
  • discharge flow line 187 communicates with flow lines 191, 192.
  • Flow line 192 communicates with accumulator 193.
  • the accumulator 193 has an oil containing portion 194, a gas containing portion 195, and wherein arrow 196 indicates the level of oil 194 contained within accumulator 193.
  • Flow control valve 197 can be the same as the valve 164 of figure 1.
  • the directional valve 198 of figure 2 can be the same as the directional valve 165 of figure 1.
  • Hydraulic cylinder 199 provides a cylinder body 200 that includes a pushrod 201 that can be raised or lowered.
  • the pushrod 201 has a rod end 202 that can be coupled to a pumping string such as a plurality of sucker rods 228 connected end to end.
  • Flow line 203 connects to flow line 191 at internal manifold tee 210.
  • Flow line 203 communicates with proportional flow control valve 204, oil cooler/fan 205, filter 206 and reservoir 182.
  • Relief valve 207 is placed in flow line 211 that extends between tee 189 and reservoir 182.
  • the relief valve 207 enables excess pressure to be vented from the discharge flow line 187 via flow line 211 to reservoir 182.
  • Valve 208 is a fan control valve that controls the flow of hydraulic fluid via flow line 209 to the fan/oil cooler 205. Flow from line 209 discharges into reservoir 182.
  • the embodiment of figure 2 operates in much the same fashion as the embodiment of figure
  • bypass valve 174 that function now taken care of by the pump 184.
  • FIGS 3-6 show an alternate construction for the hydraulic cylinder and its connection to the well string, pumping string or sucker rod string 228.
  • hydraulic cylinder 212 provides a cylinder body 213 and a pushrod 214 that moves between upper and lower positions.
  • Pushrod 214 is affixed to piston 237 and travels therewith.
  • female connector 215 At the lower end portion of pushrod 214 is provided female connector 215 to which is connected elongated polished rod 216.
  • Frame 217 forms an interface between cylinder body 213 and a wellhead tree 220.
  • the frame 217 has an upper end portion 218 to which cylinder body 213 is mounted using its flange 231.
  • the frame 217 has a lower end portion 219 that attaches to the wellhead tree 220.
  • Flange 231 can be mounted to upper end portion 218 of frame 217.
  • Rod gland 232 is connected to and extends downwardly from flange 231.
  • Head 233 forms an interface between cylinder body 213 and flange 231 as shown.
  • Flushing box 221 is mounted to the lower end portion of gland 232.
  • the flushing box 221 has an influent port 222 and an effluent port 223 , enabling a flushing fluid to be pumped from a source to the flushing box interior 239 and then discharged.
  • a continual stream of flushing fluid (for example hydraulic fluid) continuously cleans the polished rod 216 which is attached to the lower end portion of pushrod 214 at female connector 215.
  • Cylinder body 213 provides an upper port 234 and a lower port 235.
  • the upper port 234 can be a part of cap 236 which is fastened to the upper end portion of cylinder body 213 as shown.
  • Figure 4 illustrates a condition wherein the piston 237 is being elevated in the direction of arrows 241.
  • Lower port 235 is receiving inflow of hydraulic fluid as indicated schematically by the arrow 240 in figure 4.
  • Fluid above piston 237 is evacuated via port 244 illustrated in figure 5, the arrows 229 indicate schematically the flow direction of oil as the piston 237, pushrod 214, and polished rod 216 are elevated.
  • Coupling 227 is also elevating as illustrated in figure 5. In figure 6, the piston 237 is being lowered.
  • String pot 238 is mounted upon cap 236.
  • String pot 238 is a measuring apparatus that is commercially available from Parker (www.parker.com).
  • the String pot 238 has a cable or wire 248 that attaches at 249 to piston 237 or pushrod 214. As the piston 237 raises and lowers, the cable or wire 248 pays out or is retrieved by string pot 238.
  • the string pot 238 is interface with suitable instrumentation with the programmable logic controller or PLC 39. Thus, the string pot 238 replaces the limit switches of figures 1 - 42.
  • a flow tee 224 can be mounted upon wellhead tree 220 below frame 217.
  • the flow tee 224 enables oil that is being pumped from the well to be transmitted to tankage via flow line 225 as indicated schematically by arrow 230.
  • Flow line 225 can be a vent line from top of wellhead 220.
  • Blowout preventer 226 can be positioned below flow tee 224.
  • Polished rod 216 can be for example about 25-30 feet in length. Thus, the polished rod enables a very long pump stroke to be provided for pumping oil.
  • FIG. 7 shows another alternate embodiment of the apparatus of the present invention, designated generally by the numeral 250.
  • Oil well pump 250 provides a pump (e.g. hydraulic piston pump) 253 that receives hydraulic fluid via a reservoir 251 and intake flow line/filter 252.
  • the hydraulic piston pump 253 is driven by a prime mover (e.g. engine or electric motor).
  • a manifold assembly 254 is shown surrounded by dotted lines in figure 7.
  • the manifold assembly 254 includes various flow lines as shown in figure 7, directional valve 265, proportional flow control valve 271, relief valve 275, and valves 274, 276.
  • a discharge flow line 255 extends from the discharge side of pump 253 to internal manifold tee 257.
  • Check valve 256 can be placed in discharge flow line 255.
  • Valves 265, 271, 274, 275, 276 can be a part of (e.g. internal) manifold 254.
  • flow lines 258, 259 communicate with discharge flow line 255.
  • the flow line 259 extends through flow control valve 264 and to accumulator 260.
  • the accumulator 260 has an oil containing portion 261 and a gas containing portion 262.
  • arrow 263 indicates schematically the level of oil 261 in accumulator 260.
  • Hydraulic cylinder 266 is connected to both accumulator 260 and pump 253 via flow line 258.
  • Hydraulic cylinder 266 includes a cylinder body 267 and an extendable pushrod 268.
  • the pushrod 268 is movable between retracted upper and extended lower positions.
  • the pushrod 268 provides a rod end 269 that is fitted with a coupling (e.g. coupling 20 of the embodiments of figures 1-42 in Publication No. US 2007/026184 IAl, published 15 November 2007, and in Publication No. WO 2007/090193 A2, published 9 August 2007, both of which are hereby incorporated by reference) which connects the pushrod 268 to a well string such as the pumping string 21 (e.g.
  • a coupling e.g. coupling 20 of the embodiments of figures 1-42 in Publication No. US 2007/026184 IAl, published 15 November 2007, and in Publication No. WO 2007/090193 A2, published 9 August 2007, both of which are hereby incorporated by
  • Flow line 270 extends from internal manifold tee 277 through proportional flow control valve 271 to reservoir 278. Reservoirs 251 , 278 can be a common reservoir. The flow line 270 can be provided with an oil cooler 272 and filter 273. Excess pressure in the system can be relieved using relief valve 275. Valve 276 is a valve that controls flow of fan/cooler 272.
  • the prime mover e.g. engine or electric motor
  • the hydraulic pump 253 initially rotates at a speed of about
  • the hydraulic pump 253 can be a Parker Model Pl 075XS (01 SRM5 AEYOTOOCPB).
  • a pumping cycle begins by giving the hydraulic piston pump 253 a command using a controller (such as the controller 39 described herein in reference to figures 1-42), stroking it to charge accumulator 260.
  • the controller such as the controller 39 described herein in reference to figures 1-42
  • Oil 261 is then directed from the charged accumulator 260 through the flow control valve 264 and from the pump 253 into the rod end 268 of the hydraulic cylinder 266.
  • Valve 264 enables free flow in and restricted flow out to control speed of upstroke of cylinder 266.
  • Pushrod 268 will then retract lifting the pumping string until a proximity switch is actuated by a coupling that is mounted on the rod end 269.
  • the controller 39 then de-energizes the directional valve 265 and activates the proportional control valve 271 forcing it to open until the pushrod 268 begins to fall at a desired velocity.
  • the degree of opening of the proportional control valve 271 controls how fast fluid leaves the cylinder body 267 and flows via flow lines 258, 270 through the proportional flow control valve 271 and into reservoir 278.
  • the coupling on the rod end 269 reaches a second proximity switch which is positioned a short distance (e.g. approximately one foot) from the bottom of the travel of the pushrod 268.
  • a current signal to the proportional control valve 271 is decreased, forcing the pushrod 268 to decelerate until the coupling 20 on the rod end 269 of the pushrod 268 reaches a third proximity switch.
  • the electrical signal from the controller 39 will then be removed from the proportional control valve 271 , with a voltage signal then being sent by controller 39 to the directional valve 265 while maintaining the command to the pump 253 to continue pumping.
  • Oil 261 returning from the cylinder body 267 through the proportional control valve 271 passes through an oil cooler 272 and filter 273 before reaching reservoir 278.
  • the accumulator 260 will thus have a pressure change of between about five hundred (500) psi depending on sucker rod string load when it has been discharged by transmitting fluid to the cylinder 266 and a maximum pressure value of about three thousand (3,000) psi depending on sucker rod string load when it is fully charged by the pump 253 during that time that the pushrod 268 is extending and cylinder 266 is draining.
  • a second, optional, accumulator 279 is shown in figure 7, connected to flow line 258 via flow line 283.
  • the accumulator 279 has oil at 280 and gas at 281.
  • the arrow 282 shows the surface of oil 280.
  • Accumulator 279 is used to remove surge or shock in the operation of hydraulic cylinder 266 to help protect cylinder 266.
  • Accumulator 279 is in the discharge line of the pump.
  • Accumulator 279 may have a capacity of, for example, around one quart, while accumulator 260 may have a capacity of around 15 gallons.
  • Accumulator 260 my be, for example, an integrated accumulator with a capacity of around 15 gallons, or it may be an accumulator with a capacity of around 5 to 7.5 gallons, for example, with a gas bottle having a capacity of around 10 gallons, to give it a total capacity of around 15 to 17.5 gallons, for example.
  • multiple smaller capacity accumulators 260 could be used instead of one larger capacity accumulator 260 (due to space constraints, for example).
  • the oil can be, for example, hydraulic oil such as Exxon Humble Hydraulic H68 brand hydraulic oil or equivalent, biodegradable oil, Sea Blue
  • Hydraulic Oil 68 by Industrial Oils Unlimited of Arkansas the gas can be, for example, nitrogen, carbon dioxide, or any other preferably non-toxic and non-flammable commercially available compressed inert gas.
  • Valve 274 is optional, though preferred. The following is a list of parts and materials suitable for use in the present invention.
  • valve 177 internal manifold tee

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Types And Forms Of Lifts (AREA)

Abstract

L'invention concerne un appareil de pompage hydraulique de puits de pétrole, comprenant de préférence un cylindre hydraulique doté d'une tige qui se déplace entre des positions de tige supérieure et inférieure ; une colonne de pompage qui se prolonge vers le bas à partir de la tige, la colonne étant configurée pour se prolonger dans un puits de pétrole afin de pomper le pétrole du puits ; un moteur primaire ; une pompe hydraulique qui est alimentée par le moteur primaire, ladite pompe ayant un compensateur qui régule le débit et la pression de la pompe ; une vanne de régulation directionnelle qui se déplace entre des positions d'écoulement ouverte et fermée ; un accumulateur en communication fluidique avec la pompe et la vanne de régulation directionnelle ; une conduite d'écoulement reliée à la pompe et à l'accumulateur, la vanne de régulation directionnelle étant positionnée dans la conduite d'écoulement de façon à réguler l'écoulement entre l'accumulateur et le cylindre hydraulique ; une soupape de dosage ; un réservoir de fluide hydraulique pour recevoir le fluide hydraulique devant être fourni à la pompe hydraulique ; une conduite d'écoulement qui transmet le fluide hydraulique du cylindre hydraulique au réservoir par l'intermédiaire de la soupape de dosage ; et un système de commande électronique qui commande le mouvement de la tige lors de son déplacement entre les positions supérieure et inférieure, en contrôlant la soupape de régulation et la soupape de dosage, ledit système de commande comportant un signal électrique qui ouvre ou ferme la soupape de dosage de façon à permettre une commande du mouvement de la tige lors du changement de direction de la tige en position inférieure, et la soupape de dosage étant engorgée par l'écoulement inférieur qui la traverse lorsque la tige passe de la position supérieure à la position inférieure.
EP09705617A 2008-01-28 2009-01-28 Appareil de pompage hydraulique de puits de pétrole Withdrawn EP2250340A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US2402008P 2008-01-28 2008-01-28
US11916008P 2008-12-02 2008-12-02
PCT/US2009/032248 WO2009097338A2 (fr) 2008-01-28 2009-01-28 Appareil de pompage hydraulique de puits de pétrole

Publications (1)

Publication Number Publication Date
EP2250340A2 true EP2250340A2 (fr) 2010-11-17

Family

ID=40913483

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09705617A Withdrawn EP2250340A2 (fr) 2008-01-28 2009-01-28 Appareil de pompage hydraulique de puits de pétrole

Country Status (8)

Country Link
US (1) US20090194291A1 (fr)
EP (1) EP2250340A2 (fr)
AU (1) AU2009209264A1 (fr)
BR (1) BRPI0906624A2 (fr)
CA (1) CA2750337A1 (fr)
EA (1) EA201001215A1 (fr)
MX (1) MX2010008298A (fr)
WO (1) WO2009097338A2 (fr)

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AU2009209264A1 (en) 2009-08-06
CA2750337A1 (fr) 2009-08-06
EA201001215A1 (ru) 2011-02-28
US20090194291A1 (en) 2009-08-06
BRPI0906624A2 (pt) 2015-07-14
WO2009097338A3 (fr) 2009-11-05
WO2009097338A2 (fr) 2009-08-06
MX2010008298A (es) 2010-11-01

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