US20060171821A1 - Hydraulic pump jack sytem for reciprocating oil well sucker rods - Google Patents
Hydraulic pump jack sytem for reciprocating oil well sucker rods Download PDFInfo
- Publication number
- US20060171821A1 US20060171821A1 US11/103,067 US10306705A US2006171821A1 US 20060171821 A1 US20060171821 A1 US 20060171821A1 US 10306705 A US10306705 A US 10306705A US 2006171821 A1 US2006171821 A1 US 2006171821A1
- Authority
- US
- United States
- Prior art keywords
- cylinder
- rod
- piston
- pump
- tubing
- 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.)
- Abandoned
Links
- 239000003129 oil well Substances 0.000 title claims abstract description 14
- 238000005086 pumping Methods 0.000 claims abstract description 40
- 239000012530 fluid Substances 0.000 claims abstract description 29
- 239000010779 crude oil Substances 0.000 claims abstract description 10
- 238000006073 displacement reaction Methods 0.000 claims abstract description 4
- 230000007246 mechanism Effects 0.000 claims description 5
- 230000001133 acceleration Effects 0.000 claims description 2
- 230000001934 delay Effects 0.000 claims 1
- 239000003921 oil Substances 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Images
Classifications
-
- 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
- F04B47/06—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps having motor-pump units situated at great depth
- F04B47/08—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps having motor-pump units situated at great depth the motors being actuated by fluid
-
- 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
- E21B43/126—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
Definitions
- This invention relates to a system for reciprocating an oil well pump located in the bottom portion of a string of tubing in which the pump is reciprocated by sucker rods extending from the pump to the earth's surface.
- Oil wells typically vary in depth from a few hundred feet to several thousand feet. In many wells there is insufficient subterranean pressure to force the oil to the earth's surface. For this reason some system must be devised for pumping the crude oil from the producing formation to the earth's surface. The most common system for pumping an oil well is by the installation of a pumping unit at the earth's surface that vertically reciprocates a string of sucker rods extending within tubing to a subsurface pump.
- sucker rod strings have been reciprocated by a device known as a pump jack which operates by the rotation of an eccentric crank driven by a prime mover which may be an engine or an electric motor.
- a prime mover which may be an engine or an electric motor.
- Such mechanical drive mechanism has been utilized extensively in oil production industry for decades and continues to be a primary method for extracting oil from a well.
- mechanical systems suffer from a number of inherent disadvantages or inefficiencies that include their substantial size and weight that makes them expensive to produce, difficult to transport and expensive to install.
- the mass of such units also requires significant structural support elements at the wellhead which adds to the complexity and expense of the overall drive mechanism.
- mechanical drive systems have components that are physically linked or connected in some form by way of connecting rods, cams and gear boxes.
- the hydraulic pump jack drive system for reciprocating a down hole oil well pump by means of a sucker rod string includes a vertically positioned hydraulic cylinder having a reciprocated piston therein.
- a cylindrical, polished, piston rod extends from a lower end of the piston and through a bottom seal that closes the lower end of the hydraulic cylinder.
- the hydraulic cylinder preferably sits above a wellhead that has the lower end thereof connected to a tubing string that extends from the earth's surface downward to a subterranean oil producing formation.
- the wellhead has an upper end that is connected to the lower end of the hydraulic cylinder.
- the wellhead includes at least one side orifice that is adapted to be connected to a collection line by which crude oil produced by the well can be conveyed to a collection system.
- This arrangement eliminates the expense of providing a stuffing box that is typically employed with the systems currently used by the oil industry for pumping reciprocated bottom hole pumps. Not only does the system herein eliminate the stuffing box but eliminates the time and expense encountered in keeping a stuffing box properly lubricated and the packing replaced.
- the invention herein provides a hydraulic system in which the stroke action can be significantly varied.
- the sucker rod strings can be raised at a selected rate from a lower to an upper position.
- the sucker rod strings may be held briefly in a steady state so that if the bottom hole pump is of the type designed to release gas trapped within the pump, ample opportunity is given for the gas release.
- the hydraulic system may be controlled so that sucker rod string is dropped rapidly to recharge the bottom hole pump and to restart the pumping cycle.
- the present invention addresses and solves many of the problems involved in fluid extraction from oil and gas wells with current art pumping systems.
- the loss of pump capacity due to rod stretch is eliminated.
- Full stroke of the pump plunger on each stroke prevents debris accumulating in the normally unused upper section of the pump barrel and therefore allows the pump to be unseated without sticking the plunger in the pump barrel.
- the repair of pumps is reduced when the plunger and barrel can be reused.
- Well pulling costs are reduced when the pump can be unseated and the tubing flushed without sticking the plunger in the pump barrel.
- Well pulling rig costs are reduced due to the ability of the invention to long stroke the pump.
- When needed the rods can be dropped at a velocity equal to a method only possible in current art pumping systems when a pulling rig is used.
- the present invention makes possible full control of the reciprocating action of the pump including the ability to stop at the peak of the upstroke or any position in the cycle.
- the present invention can prevent pipeline damage by adjusting or stopping the rate of the sucker
- the walking beam pumping system cannot run at a slow enough rate.
- Well pulling and well tubing, rod and pump repair expense is reduced by slowing the rate to four strokes per minute or less in most wells.
- Electrical power use and maintenance is reduced. Horse power demand is less and power is only needed on the upstroke of the pump. Elimination of the cyclic load created by a walking beam pumping unit on the electric motor results in reduced power factor penalties from electrical utility companies.
- stripper wells in particular which produce ten barrels or less per day the cost of daily operations are reduced. Reduced risk of pipe line leaks, the elimination of stuffing box leaks and no mechanical maintenance reduces the cost of field equipment and employees required to operate wells.
- the present invention provides a pumping system which is easily installed on existing wells and is cheaper to operate and maintain. The productive life of all oil and gas wells depend on the economics involved in extracting and delivering the well bore fluids.
- the apparatus of the present invention includes (a) a hydraulic cylinder connected to the pumping tee; (b) a pump spacing adaptor attached to the cylinder rod; (c) a sucker rod string attached to the spacing adaptor; (d) a hydraulic pump of pre-determined pressure and rate to raise the rod string and load the down hole pump; (e) a means to control the hydraulic flow at the top of the upstroke of the down hole pump; (f) a means to hold the pump at the top of the stroke for a pre-determined time; (g) a means to release fluid back to the hydraulic reservoir and allow the gravity fall of the sucker rod string; (h) a means to regulate the speed of the gravity fall of the sucker rod string on the down stroke; and (i) a means to restart the pumping cycle at a pre
- the method of the present invention is an improved method using the above described apparatus for oil and gas well fluid extraction, which comprises, hydraulic fluid pumped into the hydraulic drive cylinder at sufficient pressure to raise the cylinder rod and sucker rod to load the down hole pump.
- hydraulic fluid pumped into the hydraulic drive cylinder at sufficient pressure to raise the cylinder rod and sucker rod to load the down hole pump.
- An adjustable pressure switch stops the flow of drive fluid at a pre-determined pressure above the string weight, but less than the pressure required to unseat the pump. This insures full stroke of the pump regardless of the rod stretch.
- the gas venting pump is held at the peak of the up stroke for a pre-determined time to vent gas out of the fluid chamber and facilitate maximum fluid pump efficiency.
- an adjustable time delay opens a solenoid valve and fluid is allowed to flow from the drive cylinder back to the hydraulic reservoir. Gravity and fluid column pressure in the well tubing allow the rods and pump to return to the down stroke position.
- a variable orifice valve adjusts the speed of the down stroke by holding back pressure on the drive cylinder. The pressure on the drive cylinder is adjusted to remain above the well tubing pressure with an adjustable back pressure valve. This insures that well fluids cannot dilute hydraulic drive fluid.
- An adjustable electric time delay restarts the hydraulic pump for the next cycle at a pre-determined time.
- Another important advantage of the present invention is the provision of a unique system for adjusting the length of the sucker rod string for more efficient actuation of the bottom hole pump.
- FIG. 1 is an elevational diagrammatic view of a pumping unit according to this invention showing a system for producing hydraulic fluid pressure flow for the actuation of a piston within a cylinder.
- FIG. 2 is an elevational view of the hydraulic cylinder with a piston rod extending therefrom.
- FIG. 3 is an elevational view of the components of the system used to adjust the length of the sucker rod string to more effectively accommodate a bottom hole pump.
- FIG. 4 is an elevational, partial cross-sectional view showing diagrammatically the components making up the system of this invention.
- FIG. 1 the basic elements making up a system that can be used to practice the invention are illustrated.
- a wellhead 10 of the type that is typically secured to the upper end of oil well casings is illustrated. Extending upwardly from wellhead 10 is the upper end portion of tubing 12 .
- Tubing 12 is typically supported by slips within the wellhead 10 , the tubing 12 hanging downwardly in the wellhead and extending down to a producing formation in the earth which may be from several hundred to several thousand feet below the earth's surface 14 .
- Tee fitting 16 Affixed to the upper end of tubing 12 is a Tee fitting 16 that has a vertical passageway therethrough. Supported on the top 18 of the Tee fitting is a vertically positioned elongated hydraulic cylinder 20 . Cylinder 20 has a top end 22 and a bottom end 24 .
- FIG. 4 shows hydraulic cylinder 20 in cross-sectional view and shows a piston 26 that is vertically and slidably displaceable within the internal cylindrical wall 28 of hydraulic cylinder 20 .
- piston 26 Affixed to piston 26 is a vertical, downwardly extending piston rod 30 .
- Piston rod 30 is shown in dotted outline in FIG. 1 .
- a seal member 32 Closing the bottom end 24 of hydraulic cylinder 20 is a seal member 32 that slidably and sealably receives piston rod 30 .
- the top end 22 of hydraulic cylinder 20 receives a closure member 34 and in the embodiments of FIGS. 1 and 4 closure member 34 has an air vent 36 therein.
- a hydraulic fluid pump 38 has a high pressure fluid outlet that is connected by pipe 40 to an inlet opening 42 in the cylindrical wall of hydraulic cylinder 20 .
- an optional return pipe 44 that in the embodiments of FIGS. 1 and 2 connects to an outlet opening 45 in the sidewall of cylinder 20 .
- return pipe 44 is optional since it may be eliminated if closure member 34 has an air vent 36 as illustrated in FIGS. 1 and 2 .
- return pipe 44 connects outlet opening 45 in hydraulic cylinder 20 back to the hydraulic fluid pump 38 .
- the hydraulic system of FIG. 1 includes a prime mover 46 , such as an engine or electric motor, by which pump 38 is powered. If prime mover 46 is a motor, energy may be supplied by way of a battery 48 that is representative of any other kind of electrical energy source.
- the hydraulic system includes hydraulic control 50 by which the force of hydraulic fluid applied to move piston 26 (as seen in FIG. 4 ) is controlled. The importance of the hydraulic control 50 will be described subsequently.
- Piston rod 30 extending through seal member 32 is attached to the upper end of a string of sucker rods, generally represented by the numeral 52 in FIG. 4 .
- the lower end of the sucker rod string 52 is secured to a bottom hole pump generally indicated by the numeral 54 in FIG. 4 .
- Sucker rod reciprocated bottom hole pumps are well known in the industry and are used for lifting fluid from a subterranean formation upwardly within tubing 12 to the earth's surface. As the fluid is pumped upwardly from the subterranean formation within tubing 12 , it enters into the internal passageway within Tee fitting 16 .
- a side opening 56 in the Tee fitting provides a way of channeling the pumped crude oil to a collection line (not shown) by which the produced crude oil may be conveyed to a storage tank or otherwise passed to systems whereby it is ultimately delivered to a refinery for production of diesel fuel, gasoline, lubricating oils and other derivatives.
- the seal member 32 at the lower end of hydraulic cylinder 20 confines the produced crude oil to the interior of Tee fitting 16 and thereby eliminates the requirement for a stuffing box. That is, there is no provision needed to seal around piston rod 30 exterior of the hydraulic cylinder 20 .
- FIG. 2 shows a different embodiment of the invention in which the hydraulic cylinder 20 has a piston therein (not seen in FIG. 2 ) that has extending downwardly from it piston rod 30 as has been described with reference to FIGS. 1 and 4 and in addition, there is an upwardly extending piston rod 58 . That is, in FIG. 2 the piston has a double extending piston rod arrangement—one extending upwardly and one extending downwardly. In this arrangement, an upper seal member 60 is used at the upper end 22 of hydraulic cylinder 20 . In the embodiment of FIG. 2 member 60 that closes the upper end 22 of the hydraulic cylinder 20 is a seal member that slidably and sealably receives an upper extending piston rod 58 . When the embodiment of FIG.
- FIG. 3 illustrates a system for adjusting the length of sucker rod string 52 .
- FIG. 3 shows a vertical tubular adjustment member 62 secured to the lower end of piston rod 30 .
- the tubular adjustment member 62 has a reduced internal diameter open lower end 64 that receives an externally threaded adjustment rod 66 .
- an internally threaded adjustment nut 68 Within tubular adjustment member 62 is an internally threaded adjustment nut 68 .
- a coupling 70 is threadably attached at the lower end of adjustment rod 62 and to the upper end of sucker rod string 52 .
- the pumping system of FIG. 1 includes a hydraulic control system 50 .
- This enables the pumping unit to be operated in a manner to make most effective use of the down hole pump 54 that is being employed.
- down hole pump 54 may be of a gas release type in which case the hydraulic control system 50 will be regulated so that hydraulic fluid is supplied from hydraulic pump 38 by way of pipe 40 to the lower surface of piston 26 in such a way that the piston is raised at a predetermined rate of speed which can be relatively constant.
- the upward movement of piston 26 lifts piston rod 30 and thereby sucker rod string 52 and a plunger (not shown) in bottom hole pump 54 , all in an upper direction.
- piston 26 reaches the upper end of its stroke as seen in FIG.
- the hydraulic control system 52 may be regulated such that the piston movement pauses before a downward stroke is commenced. The length of this pause can be adjusted by the system 50 . Further, the hydraulic system may be programmed so that the downward movement of piston 26 occurs at a much faster rate than the upward movement. The downward movement rate can be as fast as the fall rate of the sucker rod strings. After the sucker rod string, piston rod and piston have reached their lower downward limit then the upward cycle can begin with or without a delay. Thus, in a preferred way, the pumping cycle applied to bottom hole pump 54 can be carefully regulated to match the requirements of the pump.
- the pumping system herein is more economical than the typical hydraulic pumping system used for reciprocating sucker rod strings in that the need for a stuffing box is eliminated and the need for the constant repair and lubrication of the typical stuffing box is eliminated.
- the pumping system includes provision for regulating the length of the sucker rod to accurately position the down hole pump in a well and the pumping cycle of the system can be regulated to match the characteristics of the particular down hole pump being employed.
Abstract
A pumping system for vertical reciprocation of a string of sucker rods within oil well tubing having a positive displacement pump at the bottom thereof, includes a vertically positioned elongated hydraulic cylinder supported above the tubing and in alignment therewith, the cylinder having a vertically displaceable piston therein. A pump rod is affixed to the piston and extends beyond the bottom end of the cylinder. A seal member affixed to the lower end of the cylinder sealably and reciprocally receives the piston rod. A Tee fitting is secured between the tubing and the cylinder bottom end and reciprocally receives the piston rod. A controlled hydraulic power system provides fluid pressure to the cylinder to vertically reciprocate the piston and thereby the piston rod and tubing string to pump crude oil upwardly in the tubing, the crude oil flowing under pressure into the Tee fitting and out through a side opening.
Description
- This application is based on
Provisional Patent Application 60/562,207 filed April 13, 2004 entitled PUMP APPARATUS AND METHOD FOR OIL WELL PRODUCTION. - This application is not referenced in any microfiche appendix.
- This invention relates to a system for reciprocating an oil well pump located in the bottom portion of a string of tubing in which the pump is reciprocated by sucker rods extending from the pump to the earth's surface.
- Oil wells typically vary in depth from a few hundred feet to several thousand feet. In many wells there is insufficient subterranean pressure to force the oil to the earth's surface. For this reason some system must be devised for pumping the crude oil from the producing formation to the earth's surface. The most common system for pumping an oil well is by the installation of a pumping unit at the earth's surface that vertically reciprocates a string of sucker rods extending within tubing to a subsurface pump.
- Traditionally sucker rod strings have been reciprocated by a device known as a pump jack which operates by the rotation of an eccentric crank driven by a prime mover which may be an engine or an electric motor. Such mechanical drive mechanism has been utilized extensively in oil production industry for decades and continues to be a primary method for extracting oil from a well. However, such mechanical systems suffer from a number of inherent disadvantages or inefficiencies that include their substantial size and weight that makes them expensive to produce, difficult to transport and expensive to install. The mass of such units also requires significant structural support elements at the wellhead which adds to the complexity and expense of the overall drive mechanism. Furthermore, mechanical drive systems have components that are physically linked or connected in some form by way of connecting rods, cams and gear boxes. For a variety of different reasons it often becomes necessary to adjust the travel of the pump rod. Mechanical linkages, as have been previously used, present difficulties in adjusting the travel or displacement of the pumping rods. With most mechanical pumping systems in present use adjusting the rod displacement or pumping speed requires the drive system to be shut down, wasting valuable production time and increasing labor costs. Mechanical drive pump jacks are also limited in their ability to control acceleration and deceleration of the pump rod during its reciprocation.
- To combat these limitations in mechanical pump jack drive systems, others have provided a variety of different pneumatic and hydraulic drive mechanisms that have met varying degrees of success. Most hydraulic drive systems in use today are mounted above a stuffing box through which a polished rod extends. Below the stuffing box is a T-fitting so that produced oil is diverted from upward flow within the well tubing to a gathering line that connects to the stuffing box. Stuffing boxes require frequent lubrication. If not constantly lubricated, the packing in stuffing boxes soon wear out resulting in leakage that can spread crude oil to the environment. The invention herein provides an improved hydraulic operated pumping unit that, among other advantages, eliminates the need for a stuffing box.
- For additional information relating to pumping units employed in the oil industry for reciprocating sucker rod strings, reference may be had to the following previously issued U.S. patents.
Pat. No. Inventor Title 2,645,900 Hutchinson Hydraulic Type Fluid Transmission 2,651,914 Joy Pumping Head and Operating Mechanism For Wells 2,699,154 Smith Oil Well Pumping Apparatus 2,729,942 Billings et al. Manually Controllable Pumping Jack 2,838,910 Bacchi Hydraulic Pumping Jack 2,982,100 Sinclair Pumping Unit 4,320,799 Gilbertson Oil Well Pump Driving Unit 4,448,110 Polak et al. Hydraulic Pump 4,480,685 Gilbertson Oil Well Pump Driving Unit 4,490,097 Gilbertson Hydraulic Pump Driving Unit For Oil Wells 4,637,459 Roussel Anti Rotational Device For Down Hole Hydraulic Pumping Unit 4,646,517 Wright Hydraulic Well Pumping Apparatus 5,996,688 Schultz et al. Hydraulic Pump Jack Drive System For Reciprocating An Oil Well Pump Rod - The hydraulic pump jack drive system for reciprocating a down hole oil well pump by means of a sucker rod string, that is the subject of this invention, includes a vertically positioned hydraulic cylinder having a reciprocated piston therein. A cylindrical, polished, piston rod extends from a lower end of the piston and through a bottom seal that closes the lower end of the hydraulic cylinder. The hydraulic cylinder preferably sits above a wellhead that has the lower end thereof connected to a tubing string that extends from the earth's surface downward to a subterranean oil producing formation. The wellhead has an upper end that is connected to the lower end of the hydraulic cylinder. Further the wellhead includes at least one side orifice that is adapted to be connected to a collection line by which crude oil produced by the well can be conveyed to a collection system. This arrangement eliminates the expense of providing a stuffing box that is typically employed with the systems currently used by the oil industry for pumping reciprocated bottom hole pumps. Not only does the system herein eliminate the stuffing box but eliminates the time and expense encountered in keeping a stuffing box properly lubricated and the packing replaced.
- The invention herein provides a hydraulic system in which the stroke action can be significantly varied. By controlling the application of hydraulic fluid pressure the sucker rod strings can be raised at a selected rate from a lower to an upper position. At the upper positions the sucker rod strings may be held briefly in a steady state so that if the bottom hole pump is of the type designed to release gas trapped within the pump, ample opportunity is given for the gas release. Thereafter, the hydraulic system may be controlled so that sucker rod string is dropped rapidly to recharge the bottom hole pump and to restart the pumping cycle.
- The present invention addresses and solves many of the problems involved in fluid extraction from oil and gas wells with current art pumping systems. The loss of pump capacity due to rod stretch is eliminated. Full stroke of the pump plunger on each stroke prevents debris accumulating in the normally unused upper section of the pump barrel and therefore allows the pump to be unseated without sticking the plunger in the pump barrel. The repair of pumps is reduced when the plunger and barrel can be reused. Well pulling costs are reduced when the pump can be unseated and the tubing flushed without sticking the plunger in the pump barrel. Well pulling rig costs are reduced due to the ability of the invention to long stroke the pump. When needed the rods can be dropped at a velocity equal to a method only possible in current art pumping systems when a pulling rig is used. The present invention makes possible full control of the reciprocating action of the pump including the ability to stop at the peak of the upstroke or any position in the cycle. The present invention can prevent pipeline damage by adjusting or stopping the rate of the sucker rod fall on the down stroke cycle.
- In many wells, and stripper wells in particular, the walking beam pumping system cannot run at a slow enough rate. Well pulling and well tubing, rod and pump repair expense is reduced by slowing the rate to four strokes per minute or less in most wells. Electrical power use and maintenance is reduced. Horse power demand is less and power is only needed on the upstroke of the pump. Elimination of the cyclic load created by a walking beam pumping unit on the electric motor results in reduced power factor penalties from electrical utility companies. In stripper wells in particular which produce ten barrels or less per day, the cost of daily operations are reduced. Reduced risk of pipe line leaks, the elimination of stuffing box leaks and no mechanical maintenance reduces the cost of field equipment and employees required to operate wells.
- The present invention provides a pumping system which is easily installed on existing wells and is cheaper to operate and maintain. The productive life of all oil and gas wells depend on the economics involved in extracting and delivering the well bore fluids. The apparatus of the present invention includes (a) a hydraulic cylinder connected to the pumping tee; (b) a pump spacing adaptor attached to the cylinder rod; (c) a sucker rod string attached to the spacing adaptor; (d) a hydraulic pump of pre-determined pressure and rate to raise the rod string and load the down hole pump; (e) a means to control the hydraulic flow at the top of the upstroke of the down hole pump; (f) a means to hold the pump at the top of the stroke for a pre-determined time; (g) a means to release fluid back to the hydraulic reservoir and allow the gravity fall of the sucker rod string; (h) a means to regulate the speed of the gravity fall of the sucker rod string on the down stroke; and (i) a means to restart the pumping cycle at a pre-determined time.
- The method of the present invention is an improved method using the above described apparatus for oil and gas well fluid extraction, which comprises, hydraulic fluid pumped into the hydraulic drive cylinder at sufficient pressure to raise the cylinder rod and sucker rod to load the down hole pump. When the pull rod of the down hole pump reaches the maximum stroke length of the pump barrel, pressure increases above what is required to lift the rods. An adjustable pressure switch stops the flow of drive fluid at a pre-determined pressure above the string weight, but less than the pressure required to unseat the pump. This insures full stroke of the pump regardless of the rod stretch. The gas venting pump is held at the peak of the up stroke for a pre-determined time to vent gas out of the fluid chamber and facilitate maximum fluid pump efficiency. After a pre-determined time an adjustable time delay opens a solenoid valve and fluid is allowed to flow from the drive cylinder back to the hydraulic reservoir. Gravity and fluid column pressure in the well tubing allow the rods and pump to return to the down stroke position. A variable orifice valve adjusts the speed of the down stroke by holding back pressure on the drive cylinder. The pressure on the drive cylinder is adjusted to remain above the well tubing pressure with an adjustable back pressure valve. This insures that well fluids cannot dilute hydraulic drive fluid. An adjustable electric time delay restarts the hydraulic pump for the next cycle at a pre-determined time.
- Another important advantage of the present invention is the provision of a unique system for adjusting the length of the sucker rod string for more efficient actuation of the bottom hole pump.
- A better understanding of the invention will be obtained from the following detailed description of the preferred embodiments taken in conjunction with the drawings and the attached claims.
-
FIG. 1 is an elevational diagrammatic view of a pumping unit according to this invention showing a system for producing hydraulic fluid pressure flow for the actuation of a piston within a cylinder. -
FIG. 2 is an elevational view of the hydraulic cylinder with a piston rod extending therefrom. -
FIG. 3 is an elevational view of the components of the system used to adjust the length of the sucker rod string to more effectively accommodate a bottom hole pump. -
FIG. 4 is an elevational, partial cross-sectional view showing diagrammatically the components making up the system of this invention. - It is to be understood that the invention that is now to be described is not limited in its application to the details of the construction and arrangement of the parts illustrated in the accompanying drawings. The invention is capable of other embodiments and of being practiced or carried out in a variety of ways. The phraseology and terminology employed herein are for purposes of description and not limitation.
- Elements shown by the drawings are identified by the following numbers:
- 10 wellhead
- 12 tubing
- 14 earth's surface
- 16 Tee fitting
- 18 top of 16
- 20 hydraulic cylinder
- 22 top end
- 24 bottom end
- 26 piston
- 28 internal cylinder wall
- 30 downward extending piston rod
- 32 seal member
- 34 closure member
- 36 air vent
- 38 hydraulic fluid pump
- 40 pipe
- 42 inlet opening
- 44 return pipe
- 46 prime mover
- 48 battery
- 50 hydraulic controls
- 52 string of sucker rods
- 54 bottom hole pump
- 56 side opening
- 58 upwardly extending piston rod
- 60 upper seal member
- 62 tubular adjustment member
- 64 reduced diameter lower end
- 66 adjustment rod
- 68 adjustment nut
- 70 coupling
- Referring to the drawings and first to
FIG. 1 , the basic elements making up a system that can be used to practice the invention are illustrated. Awellhead 10 of the type that is typically secured to the upper end of oil well casings is illustrated. Extending upwardly fromwellhead 10 is the upper end portion oftubing 12.Tubing 12 is typically supported by slips within thewellhead 10, thetubing 12 hanging downwardly in the wellhead and extending down to a producing formation in the earth which may be from several hundred to several thousand feet below the earth'ssurface 14. - Affixed to the upper end of
tubing 12 is a Tee fitting 16 that has a vertical passageway therethrough. Supported on the top 18 of the Tee fitting is a vertically positioned elongatedhydraulic cylinder 20.Cylinder 20 has atop end 22 and abottom end 24. -
FIG. 4 showshydraulic cylinder 20 in cross-sectional view and shows apiston 26 that is vertically and slidably displaceable within the internalcylindrical wall 28 ofhydraulic cylinder 20. Affixed topiston 26 is a vertical, downwardly extendingpiston rod 30.Piston rod 30 is shown in dotted outline inFIG. 1 . - Closing the
bottom end 24 ofhydraulic cylinder 20 is aseal member 32 that slidably and sealably receivespiston rod 30. - The
top end 22 ofhydraulic cylinder 20 receives aclosure member 34 and in the embodiments ofFIGS. 1 and 4 closure member 34 has anair vent 36 therein. - As seen in
FIG. 1 , ahydraulic fluid pump 38 has a high pressure fluid outlet that is connected bypipe 40 to aninlet opening 42 in the cylindrical wall ofhydraulic cylinder 20. Also illustrated inFIG. 1 is anoptional return pipe 44 that in the embodiments ofFIGS. 1 and 2 connects to anoutlet opening 45 in the sidewall ofcylinder 20. This permitstop member 34 to be closed so that air abovepiston 26 can be circulated back and forth by the hydraulicfluid pump system 38. However, returnpipe 44 is optional since it may be eliminated ifclosure member 34 has anair vent 36 as illustrated inFIGS. 1 and 2 . In an alternate embodiment, as will be discussed with reference toFIG. 4 , returnpipe 44 connects outlet opening 45 inhydraulic cylinder 20 back to thehydraulic fluid pump 38. - The hydraulic system of
FIG. 1 includes aprime mover 46, such as an engine or electric motor, by which pump 38 is powered. Ifprime mover 46 is a motor, energy may be supplied by way of abattery 48 that is representative of any other kind of electrical energy source. In addition, the hydraulic system includeshydraulic control 50 by which the force of hydraulic fluid applied to move piston 26 (as seen inFIG. 4 ) is controlled. The importance of thehydraulic control 50 will be described subsequently. -
Piston rod 30 extending throughseal member 32 is attached to the upper end of a string of sucker rods, generally represented by the numeral 52 inFIG. 4 . The lower end of thesucker rod string 52 is secured to a bottom hole pump generally indicated by the numeral 54 inFIG. 4 . Sucker rod reciprocated bottom hole pumps are well known in the industry and are used for lifting fluid from a subterranean formation upwardly withintubing 12 to the earth's surface. As the fluid is pumped upwardly from the subterranean formation withintubing 12, it enters into the internal passageway within Tee fitting 16. Aside opening 56 in the Tee fitting provides a way of channeling the pumped crude oil to a collection line (not shown) by which the produced crude oil may be conveyed to a storage tank or otherwise passed to systems whereby it is ultimately delivered to a refinery for production of diesel fuel, gasoline, lubricating oils and other derivatives. - The
seal member 32 at the lower end ofhydraulic cylinder 20 confines the produced crude oil to the interior of Tee fitting 16 and thereby eliminates the requirement for a stuffing box. That is, there is no provision needed to seal aroundpiston rod 30 exterior of thehydraulic cylinder 20. -
FIG. 2 shows a different embodiment of the invention in which thehydraulic cylinder 20 has a piston therein (not seen inFIG. 2 ) that has extending downwardly from itpiston rod 30 as has been described with reference toFIGS. 1 and 4 and in addition, there is an upwardly extendingpiston rod 58. That is, inFIG. 2 the piston has a double extending piston rod arrangement—one extending upwardly and one extending downwardly. In this arrangement, anupper seal member 60 is used at theupper end 22 ofhydraulic cylinder 20. In the embodiment ofFIG. 2 member 60 that closes theupper end 22 of thehydraulic cylinder 20 is a seal member that slidably and sealably receives an upper extendingpiston rod 58. When the embodiment ofFIG. 2 is employed, hydraulic fluid pressure exists within the cylinder above the piston and therefore areturn pipe 44 is required. The double rod piston arrangement ofFIG. 2 that includes, in addition to the downward extendingpiston rod 30, the upwardly extendingpiston rod 58 is important in a closed hydraulic system since the quantity of hydraulic fluid remains constant during the up and down strokes of the piston. - It is important that the length of the
sucker rod string 52 as seen inFIG. 4 be adjustable for the accurate positioning ofbottom hole pump 54.FIG. 3 illustrates a system for adjusting the length ofsucker rod string 52. -
FIG. 3 shows a verticaltubular adjustment member 62 secured to the lower end ofpiston rod 30. Thetubular adjustment member 62 has a reduced internal diameter openlower end 64 that receives an externally threadedadjustment rod 66. Withintubular adjustment member 62 is an internally threadedadjustment nut 68. By the threadable position ofadjustment nut 68 onadjustment rod 66, the effective length of thesucker rod string 52 can be varied. Acoupling 70 is threadably attached at the lower end ofadjustment rod 62 and to the upper end ofsucker rod string 52. - As previously stated, the pumping system of
FIG. 1 includes ahydraulic control system 50. This enables the pumping unit to be operated in a manner to make most effective use of thedown hole pump 54 that is being employed. For instance, downhole pump 54 may be of a gas release type in which case thehydraulic control system 50 will be regulated so that hydraulic fluid is supplied fromhydraulic pump 38 by way ofpipe 40 to the lower surface ofpiston 26 in such a way that the piston is raised at a predetermined rate of speed which can be relatively constant. The upward movement ofpiston 26lifts piston rod 30 and therebysucker rod string 52 and a plunger (not shown) inbottom hole pump 54, all in an upper direction. Whenpiston 26 reaches the upper end of its stroke as seen inFIG. 4 , thehydraulic control system 52 may be regulated such that the piston movement pauses before a downward stroke is commenced. The length of this pause can be adjusted by thesystem 50. Further, the hydraulic system may be programmed so that the downward movement ofpiston 26 occurs at a much faster rate than the upward movement. The downward movement rate can be as fast as the fall rate of the sucker rod strings. After the sucker rod string, piston rod and piston have reached their lower downward limit then the upward cycle can begin with or without a delay. Thus, in a preferred way, the pumping cycle applied tobottom hole pump 54 can be carefully regulated to match the requirements of the pump. - Thus, it can be seen that the pumping system herein is more economical than the typical hydraulic pumping system used for reciprocating sucker rod strings in that the need for a stuffing box is eliminated and the need for the constant repair and lubrication of the typical stuffing box is eliminated. Further, the pumping system includes provision for regulating the length of the sucker rod to accurately position the down hole pump in a well and the pumping cycle of the system can be regulated to match the characteristics of the particular down hole pump being employed.
- While the invention has been described with a certain degree of particularity, it is manifest that many changes may be made in the details of construction and the arrangement of components without departing from the spirit and scope of this disclosure. It is understood that the invention is not limited to the embodiments set forth herein for purposes of exemplification, but is to be limited only by the scope of the attached claims, including the full range of equivalency to which each element thereof is entitled.
Claims (7)
1. A pumping system for vertical reciprocation of a string of sucker rods in oil well tubing having a positive displacement pump at the bottom thereof, comprising:
a vertically positioned elongated hydraulic cylinder having a top and bottom end and supported above said tubing and in alignment therewith;
a vertically displaceable piston within said cylinder;
a pump rod affixed to said piston and extending beyond said cylinder bottom end;
a seal member affixed to said lower end of said cylinder for sealably and reciprocally receiving said piston rod;
a Tee fitting having a vertical passageway therethrough, having a lower open end secured to said tubing, an upper open end secured to said cylinder bottom end and a side opening communicating with said passageway that reciprocally receives said piston rod; and
a controlled hydraulic power system providing fluid pressure to said cylinder to vertically reciprocate said piston and thereby said piston rod and rod string to pump crude oil upwardly in the tubing, the crude oil flowing under pressure into said Tee fitting passageway and out through said side opening.
2. A pumping system according to claim 1 wherein said cylinder top end is vented to the atmosphere.
3. A pumping system according to claim 1 including:
a top seal affixed to said upper end of said cylinder;
an upper piston rod affixed to said piston and extending beyond said cylinder top end and sealably and reciprocally received by said top seal; and
wherein said hydraulic power system provides controlled fluid flow to said cylinder above and below said piston.
4. A pumping system according to claim 1 wherein said hydraulic power system is programmable permitting separate selectable upward and downward sucker rod acceleration rates.
5. A pumping system according to claim 4 wherein said hydraulic power system includes a program providing selectable delays at the top and/or bottom of sucker rod reciprocations.
6. A pumping system according to claim 1 including a sucker rod length adjustment mechanism between said pump rod and said sucker rod string.
7. A pumping system according to claim 6 including:
a vertical tubular adjustment member affixed at an upper end to said plumb rod and having a reduced internal diameter open lower end;
an externally threaded adjustment rod having an upper end portion received within said tubular adjustment member and a lower end affixed to the sucker rod string;
and
an internally threaded adjustment nut threadably received on said adjustment rod within said adjustment tubular member, the length of the sucker rod string be adjustable by the rotational position of said adjustment bolt.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/103,067 US20060171821A1 (en) | 2004-04-13 | 2005-04-11 | Hydraulic pump jack sytem for reciprocating oil well sucker rods |
CA002542529A CA2542529A1 (en) | 2005-04-11 | 2006-04-10 | Improved hydraulic pump jack system for reciprocating oil well sucker rods |
US11/668,252 US8066496B2 (en) | 2005-04-11 | 2007-01-29 | Reciprocated pump system for use in oil wells |
US11/899,279 US8256504B2 (en) | 2005-04-11 | 2007-09-05 | Unlimited stroke drive oil well pumping system |
US13/602,384 US20120328457A1 (en) | 2005-04-11 | 2012-09-04 | Unlimited Stroke Drive Oil Well Pumping System |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US56220704P | 2004-04-13 | 2004-04-13 | |
US11/103,067 US20060171821A1 (en) | 2004-04-13 | 2005-04-11 | Hydraulic pump jack sytem for reciprocating oil well sucker rods |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/668,252 Continuation-In-Part US8066496B2 (en) | 2005-04-11 | 2007-01-29 | Reciprocated pump system for use in oil wells |
Publications (1)
Publication Number | Publication Date |
---|---|
US20060171821A1 true US20060171821A1 (en) | 2006-08-03 |
Family
ID=35253754
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/092,258 Active 2027-02-02 US7458787B2 (en) | 2004-04-13 | 2005-03-29 | Apparatus and method for reducing gas lock in downhole pumps |
US11/103,067 Abandoned US20060171821A1 (en) | 2004-04-13 | 2005-04-11 | Hydraulic pump jack sytem for reciprocating oil well sucker rods |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/092,258 Active 2027-02-02 US7458787B2 (en) | 2004-04-13 | 2005-03-29 | Apparatus and method for reducing gas lock in downhole pumps |
Country Status (2)
Country | Link |
---|---|
US (2) | US7458787B2 (en) |
CA (1) | CA2503917C (en) |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090000790A1 (en) * | 2007-06-29 | 2009-01-01 | Blackhawk Environmental Co. | Short stroke piston pump |
US20100054959A1 (en) * | 2008-08-29 | 2010-03-04 | Tracy Rogers | Systems and methods for driving a pumpjack |
US20100054966A1 (en) * | 2008-08-29 | 2010-03-04 | Tracy Rogers | Systems and methods for driving a subterranean pump |
US20100104451A1 (en) * | 2008-10-29 | 2010-04-29 | Brown T Leon | Drip Pump System and Method |
US20110232283A1 (en) * | 2007-10-15 | 2011-09-29 | Unico, Inc. | Cranked rod pump apparatus and method |
US20120075114A1 (en) * | 2009-06-15 | 2012-03-29 | Shandong Nine-Ring Petroleum Machinery Co., Ltd. | Monitoring system for sucker rod |
CN103397866A (en) * | 2013-07-24 | 2013-11-20 | 濮阳中石集团有限公司 | Tower type hydraulic pumping unit and application method thereof |
CN103671043A (en) * | 2012-09-13 | 2014-03-26 | 中国石油天然气集团公司 | Hydraulic drive oil extraction device |
US8727749B2 (en) | 2007-10-15 | 2014-05-20 | Unico, Inc. | Cranked rod pump method |
US8794932B2 (en) | 2011-06-07 | 2014-08-05 | Sooner B & B Inc. | Hydraulic lift device |
US20140234122A1 (en) * | 2013-02-15 | 2014-08-21 | Ici Artificial Lift Inc. | Rod-pumping system |
US9689251B2 (en) | 2014-05-08 | 2017-06-27 | Unico, Inc. | Subterranean pump with pump cleaning mode |
US9745975B2 (en) | 2014-04-07 | 2017-08-29 | Tundra Process Solutions Ltd. | Method for controlling an artificial lifting system and an artificial lifting system employing same |
US20190226882A1 (en) * | 2018-01-24 | 2019-07-25 | Saudi Arabian Oil Company | Fiber optic line for monitoring of well operations |
CN111379542A (en) * | 2018-12-29 | 2020-07-07 | 中国石油天然气股份有限公司 | Automatic liquid supplementing rodless liquid-drive oil production device and oil production method |
US10883810B2 (en) | 2019-04-24 | 2021-01-05 | Saudi Arabian Oil Company | Subterranean well torpedo system |
CN112483370A (en) * | 2020-11-27 | 2021-03-12 | 邹淑君 | Down-stroke adjustable pull-down plunger pump |
US10995574B2 (en) | 2019-04-24 | 2021-05-04 | Saudi Arabian Oil Company | Subterranean well thrust-propelled torpedo deployment system and method |
US11365958B2 (en) | 2019-04-24 | 2022-06-21 | Saudi Arabian Oil Company | Subterranean well torpedo distributed acoustic sensing system and method |
US11920579B2 (en) * | 2018-10-05 | 2024-03-05 | Halliburton Energy Services, Inc. | Compact high pressure, high life intensifier pump system |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8066496B2 (en) * | 2005-04-11 | 2011-11-29 | Brown T Leon | Reciprocated pump system for use in oil wells |
US7686598B2 (en) * | 2006-01-03 | 2010-03-30 | Harbison-Fischer, Inc. | Downhole pumps with sand snare |
US7891960B2 (en) | 2006-03-13 | 2011-02-22 | Lea Jr James F | Reciprocal pump for gas and liquids |
US20120114510A1 (en) * | 2007-01-29 | 2012-05-10 | Brown T Leon | Reciprocated Pump System for Use in Oil Wells |
CA2628190C (en) * | 2007-04-03 | 2015-04-07 | Harbison-Fischer, Inc. | High compression downhole pump |
US8651191B2 (en) * | 2009-09-30 | 2014-02-18 | Conocophillips Company | Slim hole production system and method |
AU2010300497B2 (en) * | 2009-09-30 | 2014-08-21 | Conocophillips Company | Producing gas and liquid from below a permanent packer in a hydrocarbon well |
US9617129B2 (en) * | 2010-03-16 | 2017-04-11 | Brookefield Hunter, Inc. | Hydraulic pumping cylinder and method of pumping hydraulic fluid |
US8858187B2 (en) | 2011-08-09 | 2014-10-14 | Weatherford/Lamb, Inc. | Reciprocating rod pump for sandy fluids |
CA2860169C (en) * | 2011-12-30 | 2016-05-24 | National Oilwell Varco, L.P. | Reciprocating subsurface pump |
CN103334919B (en) * | 2012-06-04 | 2016-03-30 | 中国石油化工股份有限公司江苏油田分公司 | Triple channel sand prevention standing valve |
US20140178225A1 (en) * | 2012-12-21 | 2014-06-26 | John Bradford, JR. | Tubing inserted balance pump |
US10174752B2 (en) * | 2013-01-17 | 2019-01-08 | Innovative Oilfield Consultants Ltd Operating As Conn Pumps | Anti-gas lock valve for a reciprocating downhole pump |
US10151182B2 (en) * | 2013-02-22 | 2018-12-11 | Samson Pump Company, Llc | Modular top loading downhole pump with sealable exit valve and valve rod forming aperture |
US9157301B2 (en) | 2013-02-22 | 2015-10-13 | Samson Pump Company, Llc | Modular top loading downhole pump |
US9574562B2 (en) | 2013-08-07 | 2017-02-21 | General Electric Company | System and apparatus for pumping a multiphase fluid |
CN103452822A (en) * | 2013-09-05 | 2013-12-18 | 常州大学 | Novel oil-well pump |
AR099439A1 (en) * | 2013-10-11 | 2016-07-27 | López Fidalgo Daniel Rodolfo | PUMP FOR EXTRACTION OF WATER, OIL OR OTHER FLUIDS |
US10364658B2 (en) | 2015-09-14 | 2019-07-30 | Vlp Lift Systems, Llc | Downhole pump with controlled traveling valve |
US10385663B2 (en) * | 2016-10-21 | 2019-08-20 | Weatherford Technology Holdings, Llc | Subsurface pump for use in well artificial lift operations having an interior flow passage of a plunger being in communication with a fluid chamber via a filter |
US10450847B2 (en) | 2017-04-18 | 2019-10-22 | Weatherford Technology Holdings, Llc | Subsurface reciprocating pump for gassy and sandy fluids |
RU2652693C1 (en) * | 2017-07-12 | 2018-04-28 | Вячеслав Владимирович Леонов | Deep-well pump |
CN109538452B (en) * | 2018-12-17 | 2024-02-09 | 中船重工中南装备有限责任公司 | Thickened oil pump |
CN109441393A (en) * | 2019-01-08 | 2019-03-08 | 成都百胜野牛科技有限公司 | Plunger Lift oil/gas well wellhead assembly and Plunger Lift oil/gas well |
MX2021009832A (en) * | 2019-02-14 | 2022-01-24 | Ravdos Holdings Inc | Improved seal configuration for downhole reciprocating pumps. |
Citations (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2645900A (en) * | 1947-04-05 | 1953-07-21 | Loyd E Hutchison | Hydraulic type fluid transmission |
US2654914A (en) * | 1950-07-27 | 1953-10-13 | Continental Can Co | Method of forming closure caps by molding and partially fluxing a paste resin composition with subsequent final fluxing thereafter |
US2699154A (en) * | 1952-07-12 | 1955-01-11 | Samuel V Smith | Oil well pumping apparatus |
US2729942A (en) * | 1954-12-17 | 1956-01-10 | Pelton Walter Wheel Company | Manually controllable pumping jack |
US2838910A (en) * | 1955-08-18 | 1958-06-17 | Baldwin Lima Hamilton Corp | Hydraulic pumping jack |
US2982100A (en) * | 1958-10-17 | 1961-05-02 | William S Thompson | Pumping unit |
US4173451A (en) * | 1978-05-08 | 1979-11-06 | Reserve Oil, Inc. | Downhole pump |
US4320799A (en) * | 1980-09-03 | 1982-03-23 | Gilbertson Thomas A | Oil well pump driving unit |
US4448110A (en) * | 1980-02-27 | 1984-05-15 | P & W Pumping-Jack Co. | Hydraulic pump |
US4480685A (en) * | 1980-09-03 | 1984-11-06 | Gilbertson Thomas A | Oil well pump driving unit |
US4490097A (en) * | 1981-02-23 | 1984-12-25 | Gilbertson Thomas A | Hydraulic pump driving unit for oil wells |
US4616981A (en) * | 1984-10-19 | 1986-10-14 | Simmons Eugene D | Pumping apparatus with a down-hale spring loaded piston actuated by fluid pressure |
US4637459A (en) * | 1985-06-28 | 1987-01-20 | Roussel Louis J | Anti rotational device for down hole hydraulic pumping unit |
US4646517A (en) * | 1983-04-11 | 1987-03-03 | Wright Charles P | Hydraulic well pumping apparatus |
US5653290A (en) * | 1995-05-12 | 1997-08-05 | Campbell Industries Ltd. | Rotating rod string position adjusting device |
US5832727A (en) * | 1992-03-03 | 1998-11-10 | Stanley; Lloyd | Hydraulic oil well pump drive system |
US5996688A (en) * | 1998-04-28 | 1999-12-07 | Ecoquip Artificial Lift, Ltd. | Hydraulic pump jack drive system for reciprocating an oil well pump rod |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2371846A (en) * | 1943-03-26 | 1945-03-20 | Ruthven Side Pocket Dam Corp | Pump |
US3479958A (en) * | 1968-01-18 | 1969-11-25 | United States Steel Corp | Seating arrangement for subsurface pumps |
US3578886A (en) * | 1968-09-11 | 1971-05-18 | Texas Petroleum Co | Downhole producing pump |
US3953155A (en) * | 1974-11-04 | 1976-04-27 | Roeder George K | Pump plunger |
US3966360A (en) * | 1975-01-27 | 1976-06-29 | Greene James L | Continuous-flow fluid pump |
US4643258A (en) * | 1985-05-10 | 1987-02-17 | Kime James A | Pump apparatus |
CA1259224A (en) * | 1985-05-31 | 1989-09-12 | Amerada Minerals Corporation Of Canada Ltd. | Gas-lock breaking device |
US4968226A (en) * | 1989-04-28 | 1990-11-06 | Brewer Carroll L | Submergible reciprocating pump with perforated barrel |
US5651666A (en) * | 1995-12-21 | 1997-07-29 | Martin; John Kaal | Deep-well fluid-extraction pump |
US6273690B1 (en) * | 1999-06-25 | 2001-08-14 | Harbison-Fischer Manufacturing Company | Downhole pump with bypass around plunger |
US6193476B1 (en) * | 1999-09-13 | 2001-02-27 | Gerald T. Sweeney | 1½ Piston force pump |
US6746222B2 (en) * | 2002-07-22 | 2004-06-08 | Milton Skillman | Bottom discharge valve |
-
2005
- 2005-03-29 US US11/092,258 patent/US7458787B2/en active Active
- 2005-04-01 CA CA2503917A patent/CA2503917C/en active Active
- 2005-04-11 US US11/103,067 patent/US20060171821A1/en not_active Abandoned
Patent Citations (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2645900A (en) * | 1947-04-05 | 1953-07-21 | Loyd E Hutchison | Hydraulic type fluid transmission |
US2654914A (en) * | 1950-07-27 | 1953-10-13 | Continental Can Co | Method of forming closure caps by molding and partially fluxing a paste resin composition with subsequent final fluxing thereafter |
US2699154A (en) * | 1952-07-12 | 1955-01-11 | Samuel V Smith | Oil well pumping apparatus |
US2729942A (en) * | 1954-12-17 | 1956-01-10 | Pelton Walter Wheel Company | Manually controllable pumping jack |
US2838910A (en) * | 1955-08-18 | 1958-06-17 | Baldwin Lima Hamilton Corp | Hydraulic pumping jack |
US2982100A (en) * | 1958-10-17 | 1961-05-02 | William S Thompson | Pumping unit |
US4173451A (en) * | 1978-05-08 | 1979-11-06 | Reserve Oil, Inc. | Downhole pump |
US4448110A (en) * | 1980-02-27 | 1984-05-15 | P & W Pumping-Jack Co. | Hydraulic pump |
US4320799A (en) * | 1980-09-03 | 1982-03-23 | Gilbertson Thomas A | Oil well pump driving unit |
US4480685A (en) * | 1980-09-03 | 1984-11-06 | Gilbertson Thomas A | Oil well pump driving unit |
US4490097A (en) * | 1981-02-23 | 1984-12-25 | Gilbertson Thomas A | Hydraulic pump driving unit for oil wells |
US4646517A (en) * | 1983-04-11 | 1987-03-03 | Wright Charles P | Hydraulic well pumping apparatus |
US4616981A (en) * | 1984-10-19 | 1986-10-14 | Simmons Eugene D | Pumping apparatus with a down-hale spring loaded piston actuated by fluid pressure |
US4637459A (en) * | 1985-06-28 | 1987-01-20 | Roussel Louis J | Anti rotational device for down hole hydraulic pumping unit |
US5832727A (en) * | 1992-03-03 | 1998-11-10 | Stanley; Lloyd | Hydraulic oil well pump drive system |
US5997181A (en) * | 1992-03-03 | 1999-12-07 | Stanley; Lloyd | Hydraulic oil well pump drive system |
US5653290A (en) * | 1995-05-12 | 1997-08-05 | Campbell Industries Ltd. | Rotating rod string position adjusting device |
US5996688A (en) * | 1998-04-28 | 1999-12-07 | Ecoquip Artificial Lift, Ltd. | Hydraulic pump jack drive system for reciprocating an oil well pump rod |
Cited By (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090000790A1 (en) * | 2007-06-29 | 2009-01-01 | Blackhawk Environmental Co. | Short stroke piston pump |
US8708671B2 (en) | 2007-10-15 | 2014-04-29 | Unico, Inc. | Cranked rod pump apparatus and method |
US20110232283A1 (en) * | 2007-10-15 | 2011-09-29 | Unico, Inc. | Cranked rod pump apparatus and method |
US8727749B2 (en) | 2007-10-15 | 2014-05-20 | Unico, Inc. | Cranked rod pump method |
US20100054959A1 (en) * | 2008-08-29 | 2010-03-04 | Tracy Rogers | Systems and methods for driving a pumpjack |
US20100054966A1 (en) * | 2008-08-29 | 2010-03-04 | Tracy Rogers | Systems and methods for driving a subterranean pump |
US20100104451A1 (en) * | 2008-10-29 | 2010-04-29 | Brown T Leon | Drip Pump System and Method |
US8246315B2 (en) | 2008-10-29 | 2012-08-21 | Brown T Leon | Drip pump system |
US20120075114A1 (en) * | 2009-06-15 | 2012-03-29 | Shandong Nine-Ring Petroleum Machinery Co., Ltd. | Monitoring system for sucker rod |
US8947256B2 (en) * | 2009-06-15 | 2015-02-03 | Shandong Nine-Ring Petroleum Machinery Co., Ltd. | Monitoring system for sucker rod |
US8794932B2 (en) | 2011-06-07 | 2014-08-05 | Sooner B & B Inc. | Hydraulic lift device |
WO2013095698A3 (en) * | 2011-06-08 | 2013-10-17 | Unico, Inc. | Cranked rod pump apparatus and method |
EA027556B1 (en) * | 2011-06-08 | 2017-08-31 | Юнико, Инк. | Cranked rod pump apparatus |
CN103671043A (en) * | 2012-09-13 | 2014-03-26 | 中国石油天然气集团公司 | Hydraulic drive oil extraction device |
US20140234122A1 (en) * | 2013-02-15 | 2014-08-21 | Ici Artificial Lift Inc. | Rod-pumping system |
CN103397866A (en) * | 2013-07-24 | 2013-11-20 | 濮阳中石集团有限公司 | Tower type hydraulic pumping unit and application method thereof |
US9745975B2 (en) | 2014-04-07 | 2017-08-29 | Tundra Process Solutions Ltd. | Method for controlling an artificial lifting system and an artificial lifting system employing same |
US9689251B2 (en) | 2014-05-08 | 2017-06-27 | Unico, Inc. | Subterranean pump with pump cleaning mode |
US10156109B2 (en) | 2014-05-08 | 2018-12-18 | Unico, Inc. | Subterranean pump with pump cleaning mode |
US20190226882A1 (en) * | 2018-01-24 | 2019-07-25 | Saudi Arabian Oil Company | Fiber optic line for monitoring of well operations |
US10955264B2 (en) * | 2018-01-24 | 2021-03-23 | Saudi Arabian Oil Company | Fiber optic line for monitoring of well operations |
US11920579B2 (en) * | 2018-10-05 | 2024-03-05 | Halliburton Energy Services, Inc. | Compact high pressure, high life intensifier pump system |
CN111379542A (en) * | 2018-12-29 | 2020-07-07 | 中国石油天然气股份有限公司 | Automatic liquid supplementing rodless liquid-drive oil production device and oil production method |
US10883810B2 (en) | 2019-04-24 | 2021-01-05 | Saudi Arabian Oil Company | Subterranean well torpedo system |
US10995574B2 (en) | 2019-04-24 | 2021-05-04 | Saudi Arabian Oil Company | Subterranean well thrust-propelled torpedo deployment system and method |
US11365958B2 (en) | 2019-04-24 | 2022-06-21 | Saudi Arabian Oil Company | Subterranean well torpedo distributed acoustic sensing system and method |
CN112483370A (en) * | 2020-11-27 | 2021-03-12 | 邹淑君 | Down-stroke adjustable pull-down plunger pump |
Also Published As
Publication number | Publication date |
---|---|
US7458787B2 (en) | 2008-12-02 |
CA2503917C (en) | 2013-06-11 |
US20050226752A1 (en) | 2005-10-13 |
CA2503917A1 (en) | 2005-10-13 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20060171821A1 (en) | Hydraulic pump jack sytem for reciprocating oil well sucker rods | |
US8066496B2 (en) | Reciprocated pump system for use in oil wells | |
US8256504B2 (en) | Unlimited stroke drive oil well pumping system | |
US20120114510A1 (en) | Reciprocated Pump System for Use in Oil Wells | |
US4540348A (en) | Oilwell pump system and method | |
US20140231093A1 (en) | Hydraulic Oil Well Pumping System, and Method for Delivering Gas From a Well | |
US6497561B2 (en) | Downstroke sucker rod pump and method of use | |
US4026661A (en) | Hydraulically operated sucker rod pumping system | |
AU2017322689A1 (en) | Downhole pump with controlled traveling valve | |
US10788029B2 (en) | Method and system for energy recovery from a rod pump | |
US9151141B1 (en) | Apparatus and method for modifying loading in a pump actuation string in a well having a subsurface pump | |
US20060169458A1 (en) | Pumping system and method for recovering fluid from a well | |
US4781543A (en) | Artificial lift system for oil wells | |
US20210079771A1 (en) | Reciprocating downhole pump | |
US20100071891A1 (en) | Apparatus For Pumping Fluids From A Well | |
US11585194B2 (en) | Apparatus and methods for optimizing control of artificial lifting systems | |
US1909659A (en) | Oil well pumping apparatus | |
CA2542529A1 (en) | Improved hydraulic pump jack system for reciprocating oil well sucker rods | |
RU2498058C1 (en) | Oil-well sucker-rod pumping unit for water pumping to stratum | |
RU147329U1 (en) | HYDRAULIC RETURNING AND INJURY MOVEMENT | |
US4565496A (en) | Oil well pump system and method | |
US20060045767A1 (en) | Method And Apparatus For Removing Liquids From Wells | |
CA2639189C (en) | An unlimited stroke drive oil well pumping system | |
US4390326A (en) | Downhole pump having a power piston and a production piston | |
RU2258837C2 (en) | Method of and device to provide operation of suction valve of deep-well sucker-rod pump |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |