CN1231654C - Rod free hydraulic oil pumping system - Google Patents
Rod free hydraulic oil pumping system Download PDFInfo
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- CN1231654C CN1231654C CN 03102664 CN03102664A CN1231654C CN 1231654 C CN1231654 C CN 1231654C CN 03102664 CN03102664 CN 03102664 CN 03102664 A CN03102664 A CN 03102664A CN 1231654 C CN1231654 C CN 1231654C
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Abstract
The present invention relates to the technical field of oil extraction, particularly to a rodless hydraulic oil pumping system which drives an underground hydraulic oil-well pump to produce the oil and utilizes hydraulic pressure as power. The system generates high-pressure power by adopting a ground hydraulic pump; the pressure is increased by a pressurization cylinder (19); an isolator (21) is converted by water power; the hydraulic force is transferred to the underground, and a hydraulic oil pump (20) is driven to operate. When var power liquid returns the ground by the original inlet pipeline, the produced liquid is conveyed to the ground by a center hole of a hollow sucker rod. The ground controls pistons (24), (35) of the hydraulic oil pump (20) to make the reciprocal motion. The structure of the underground hydraulic oil pump (20) is simple, and the water power liquid of the hydraulic oil pump is transferred to the hydraulic oil pump (20) by annular space between an oil pipe and the hollow sucker rod. When the var power liquid returns along the original annular space. Compared with the prior art, the present invention reduces a pipeline and lowers the underground accident rate.
Description
Technical field
The present invention relates to technical field of petroleum extraction, is a kind of a kind of Rodless hydraulic oil pumping system that utilizes hydraulic pressure for the oil recovery of power drive underground hydraulic pressure oil well pump, belongs to Rodless hydraulic oil pumping equipment.The present invention adopts the ground hydraulic power station to produce high voltage power and supercharging, power fluid after the supercharging is delivered to the underground hydraulic pressure oil well pump by the annular space between two pipes, the driving hydraulic well pump recovers the oil, weary power fluid returns ground by the former annular space that enters, and production fluid is transported to ground by minor diameter tubing (or hollow rod) centre bore.
Background technology
Now, most widely used pumping unit is a trip fine strain of millet formula oil pumping system, and oil pumper drives sucker rod and pumps, and drives the downhole pump plunger and pumps.Travelling valve and standing valve are alternately opened and are closed, and make production fluid give rise to ground.
In addition, also has a kind of hydraulic piston pump oil production method.Bring into use in China the eighties.Its advantage is: pump is hung dark, the lift height, and discharge capacity is big, and is applied widely etc.The hydraulic system of this oil production method is divided into two kinds of open-cycle system and closed circulation systems.Open-cycle system is that weary power fluid mixed with stratum production fluid (crude oil), gives rise to ground by the annular space between sleeve pipe and the oil pipe after high voltage power liquid arrived the work of down-hole driving oil well pump.Closed circulation system has independently reflux pipeline, does not mix with the stratum production fluid when the weary power fluid of backflow returns ground, and independently Returning pipe is arranged.Driving the down-hole double acting sucker rod pump with a Closed Hydraulic circulating system is representative, and hydraulic piston pump oil production method, closed circulation system and oil well pump are described.
A kind of double acting hydraulic piston pump is made up of oil pipe, travelling valve, standing valve, last fluid cylinder, following fluid cylinder and institutes such as control guiding valve and piston.The following chamber of last fluid cylinder and the last chamber of following fluid cylinder are as the mechanism of surging, with the turnover power fluid; The last chamber of last fluid cylinder and the following chamber of following fluid cylinder are as pump, with suction well liquid; Near the pump chamber place, inlet valve and blow off valve are housed; The piston of upper and lower fluid cylinder connects with piston rod, and piston rod is a solid hopkinson bar.There is the commutation control flume upper and lower of piston rod, and the control guiding valve moves up and down; Between last fluid cylinder, following fluid cylinder and travelling valve, the standing valve several sealing is arranged, form the power fluid runner; The differential type reversing slide valve is positioned in the middle of the upper and lower piston; This double acting hydraulic piston pump is in the overall process of work, and piston rod is subjected to tensile load all the time; Hoisting mechanism is arranged at the top of pump; Tailstock is arranged at the bottom of pump.
The ground hydraulic device supporting with individual well is example, and closed circulation system is described.Closed circulation system is made up of surface pump group, high pressure pipe joint and power flow container.High pressure line connects surface pump group and high pressure pipe joint, and high pressure pipe joint connects well head power fluid inlet.Weary power fluid outlet on the well head connects the power flow container, and the outlet of jar connects the surface pump unit.Ground installation is fairly simple.
The running of ground hydraulic device electrodynamic pump produces high voltage power liquid, enters down-hole string by high pressure pipe joint and arrives downhole pump, drives oil well pump work.The commutation control flume control guiding valve and the reciprocating motion of the pistons of oil well pump piston rod upper and lower, standing valve and travelling valve are alternately opened and are closed, and production fluid is given rise to ground.The production fluid of extraction by the annular space between sleeve pipe and the oil pipe by on lift ground.The weary power fluid that returns flows out by another tubing string passage, enters the power flow container, recycles for pump assembly.
The supporting use of this oil well pump and downhole packer.Its weak point is: the piston commutation is to be finished by oil well pump pull bar upper and lower part commutation groove and hole effect.Piston commutation and reciprocating motion control are what to be finished by the commutation groove of downhole pump.If wearing and tearing or power fluid take place in oil well pump when containing situation such as impurity and causing commutation malfunctioning, must thousands of meters depths trip out from the down-hole with hydraulic well pump, to keep in repair, influence is recovered the oil and is produced.The second, in open-cycle system, lack power fluid and mix back discharge well head in the down-hole with production fluid, must could use as power fluid through after complicated separation, the processing of heating.The workload of floor treatment power fluid is very big, has increased cost for oil production.In closed circulation system, power fluid has the passage of two turnover in the down-hole.Article one, be the power fluid passage from the well head to the oil well pump, another is the weary power fluid passage that oil well pump returns ground, compares many down-hole pipelines with open-cycle system.The space, down-hole is limited, and pipeline causes down-hole accident to increase more.The difficulty of construction that downhole pump is installed increases.
Summary of the invention
The objective of the invention is: design a kind of brand-new Rodless hydraulic oil pumping system, overcome the employing closed circulation system, power fluid conveying and return flow line are many, the shortcoming that causes down-hole accident to increase; Overcome the commutation of oil well pump piston and be controlled at the shortcoming that finish the down-hole.Realize the commutation of Ground Control hydraulic oil pumping pump piston, simplify the downhole pump structure, reduce the oil well pump cost of manufacture, reduce the oil well pump maintenance load.
The present invention is achieved in that
A, ground hydraulic system: form by institutes such as fuel tank, electric-powered pump, reversal valve, accumulator, pressurized cylinder, water tank, isolator, electronic fluid infusion pump, hydraulic control one-way valve, counterbalance valve, one way valves, be divided into three parts by function.
1, hydraulic pressure and supercharging part: electric-powered pump intake has pipeline to connect the connected tank outlet.Hydraulic oil is arranged in the fuel tank.Electric-powered pump discharge has high pressure line to connect overflow valve and one way valve.Overflow valve takes back oil pipeline, and the oil return pipeline connects fuel tank.One way valve connects two solenoid operated directional valves and accumulator, and an interface of one of them solenoid operated directional valve connects the low pressure chamber end opening of pressurized cylinder; An interface connects the oil return pipeline.In the low pressure chamber of pressurized cylinder piston is arranged, piston is separated into upper and lower two parts with low pressure chamber.The last interface of low pressure chamber connects accumulator and overflow valve.The high pressure chest of pressurized cylinder has high pressure line to connect the isolator lower hydraulic pressure chamber, is connected with a hydraulic control one-way valve on the high pressure line between pressurized cylinder and the isolator.
2, power fluid part: as power fluid, describe with water.Dress water in the water tank, the water tank outlet has pipeline to connect electronic fluid infusion pump intake.Electronic fluid infusion pump discharge has pipeline to connect hydrodynamic force liquid one end of one way valve and isolator epicoele.To the pipeline of one way valve, draw pipeline connection hydraulic control one-way valve at electronic fluid infusion pump, and the water receiving case.To the pipeline of isolator, draw pipeline connection hydraulic control one-way valve and counterbalance valve at one way valve, and the water receiving case.The hydrodynamic force liquid that isolator epicoele hydrodynamic force liquid one end has pipeline to connect on the well head enters the mouth.Hydrodynamic force liquid is transported to the underground hydraulic pressure oil well pump from the annular space between major diameter oil pipe and the minor diameter tubing (hollow rod), for hydraulic well pump provides power.In the middle of the pipeline of well head, be in series with one-way throttle valve and flow meter at isolator.
3, hydraulic control part: electric-powered pump discharge pipeline and oil return pipeline are connected the power mouth P and the oil return inlet T of solenoid operated directional valve respectively, and the A mouth of solenoid operated directional valve communicates with the control mouth of hydraulic control one-way valve, and the B mouth communicates with the control mouth of hydraulic control one-way valve.The work of flow meter control electromagnetic valve has flow transmitter on the flow meter.
B, underground hydraulic pressure oil well pump: form by urceolus, standing valve, travelling valve, last cylinder barrel, upper piston, following cylinder barrel, lower piston, connecting rod, plunger case and plunger etc.Set upright step and limited step in the urceolus, set upright step and limited step and play the stator bore effect.Top is set upright the dynamic liquid of step and is passed through the hole.The dynamic liquid in last cylinder barrel bottom is imported and exported, and power fluid can be imported and exported by power fluid and enter in the upper piston cavity of resorption from the annular space between urceolus and the last cylinder barrel, promotes upper piston and moves upward.Upper piston is connected by connecting rod between upper piston and the lower piston in last cylinder barrel.Lower piston is connected with plunger.Upper piston, lower piston, connecting rod and plunger have centre bore, and centre bore is that production fluid is by the passage of lifting.The plunger bottom connects travelling valve.Plunger has plunger case outward.The bottom of plunger case is connected and fixed valve.Standing valve and travelling valve are the necessary parts of existing hydraulic well pump, adopt spherical valve mostly, are prior aries, are not described in detail.
For the urceolus of underground hydraulic pressure oil well pump is connected with oil pipe, screw thread is arranged in the urceolus upper end; For cylinder barrel on the underground hydraulic pressure oil well pump is connected with hollow rod, screw thread is arranged in last cylinder barrel upper end.
The oil extraction operation principle is: electric-powered pump produces oily power, through the pressurized cylinder supercharging.Oily power fluid after the supercharging passes to the hydrodynamic force liquid of down-hole by isolator, and hydrodynamic force liquid drives the work of underground hydraulic pressure oil well pump.Hydrodynamic force liquid is that the annular space between major diameter oil pipe and minor diameter tubing (or hollow rod) passes to the underground hydraulic pressure oil well pump, makes on the hydraulic well pump upper piston and lifts.During last act, travelling valve is closed automatically, and standing valve is opened automatically, and production fluid enters hydraulic well pump.Lift top dead-centre on the hydraulic oil pumping pump piston, solenoid operated directional valve commutates under the control of the signal of telecommunication that flow meter sends, and the electric-powered liquid that comes that pumps stores by accumulator.Pressurized cylinder, isolator stop to provide hydraulic power for the underground hydraulic pressure oil well pump.The hydraulic well pump lower piston moves downward under the effect of production fluid head of liquid.Travelling valve is opened, and standing valve is closed, and production fluid enters the hydraulic well pump inner chamber.The hydraulic oil pumping pump piston is when moving downward, and the annular space of hydrodynamic force liquid between major diameter oil pipe and minor diameter tubing (or hollow rod) returns isolator.Finish primary oil recovery work.When hydraulic well pump piston arrives bottom dead centre, flow meter sends the commutation of signal of telecommunication control surface em reversal valve, and electric-powered pump and accumulator provide hydraulic power to pressurized cylinder, isolator simultaneously, carry out next one oil recovery circulation.
In order to prevent that hydrodynamic force liquid from causing the problem of feed flow deficiency in down-hole leakage, has fluid infusion system on the pipeline before hydrodynamic force liquid is gone into well.Fluid infusion system is made up of electronic fluid infusion pump, one way valve and hydraulic control one-way valve, counterbalance valve, and hydraulic control one-way valve is controlled by solenoid operated directional valve.
Effect of the present invention: lift top dead-centre on the hydraulic oil pumping pump piston, the signal of telecommunication control solenoid operated directional valve commutation that flow meter sends, piston begins descending; The hydraulic well pump descent of piston is to bottom dead centre, and the signal of telecommunication control solenoid operated directional valve that flow meter sends commutates, and piston begins to go up to be lifted.The reciprocating motion of hydraulic oil pumping pump piston is by the flow meter on ground and solenoid operated directional valve control.Realize that Ground Control hydraulic oil pumping pump piston pumps, make underground hydraulic pressure oil pumping pump structure simpler.Hydrodynamic force liquid is that the annular space between major diameter oil pipe and minor diameter tubing (or hollow rod) passes to the underground hydraulic pressure oil well pump.When returning, weary power fluid still returns along former annular space.Reduced by a pipeline than prior art closed circulation system, reduced pump work amount down, reduced the down-hole accident rate.
Description of drawings
Illustrations 1 is the fundamental diagram of Rodless hydraulic oil pumping system, i.e. ground hydraulic dynamical system and underground hydraulic pressure oil well pump schematic diagram.
Accompanying drawing 2 is hydraulic well pump structural representations.What represent is the duty that upper and lower piston (24) (35) moves upward.The indicated direction of dotted arrow is the flow direction that hydrodynamic force liquid enters cylinder barrel (22); The indicated direction of solid arrow is well liquid, production fluid flow direction.
Accompanying drawing 3 is hydraulic well pump structure principle charts, is the duty of upper and lower piston (24) (35) when moving downward.The indicated direction of dotted arrow is hydrodynamic force liquid flow direction when returning; Direction well liquid that solid arrow is indicated and production fluid flow direction.
The application accompanying drawing is the application's embodiment, can not be interpreted as full content of the present invention.
The sequence number that marks in the accompanying drawing and the component names of representative are: 1-one-way throttle valve, 2-flow meter, 3-hydraulic control one-way valve, 4-one way valve, the 5-counterbalance valve, 6-hydraulic control one-way valve, the electronic fluid infusion pump of 7-, 8-water tank, the 9-fuel tank, 10-overflow valve, 11-one way valve, the electric-powered pump of 12-, 13-overflow valve, 14-accumulator, the 15-solenoid operated directional valve, 16-solenoid operated directional valve, 17-accumulator, the 18-hydraulic control one-way valve, 19-pressurized cylinder, 20-hydraulic well pump, the 21-isolator, 22-urceolus, the last cylinder barrel of 23-, the 24-upper piston, the 25-power fluid is imported and exported, and 26-sets upright step, the 27-seal, 28-limited step, 29-travelling valve, the 30-standing valve, 31-plunger case, 32-plunger, 33-well liquid is imported and exported, and 34-well liquid is imported and exported, the 35-lower piston, the 36-production fluid is imported and exported, cylinder barrel under the 37-, 38-connecting rod.
The specific embodiment
Hydraulic well pump (20) urceolus 22 upper ends connect 3 TBG oil pipes, and connection external diameter in last cylinder barrel (23) upper end is 42 millimeters a hollow rod.Hydraulic well pump (20) has two fluid passages to ground, one is the annular space between 3 TBG oil pipes and the hollow rod, the centre bore of a hollow rod.Electric-powered pump (12) produces hydraulic coupling, by pressurized cylinder 19 superchargings.The low pressure chamber piston diameter of pressurized cylinder (19) is 210 millimeters, and the high pressure chest diameter of plunger is 150 millimeters.When the low pressure (LP) cylinder internal pressure was 8MPa, the pressure in the high pressure cylinder was 15.7MPa.Pass to isolator 21 after the supercharging, the oil pressure of isolator 21 cavity of resorptions passes to hydrodynamic force liquid by the leather bag in the isolator (21), forms water pressure.The annular space of hydrodynamic force liquid between oil pipe and hollow rod passes to underground hydraulic pressure oil well pump (20) upper piston (24) cavity of resorption, makes hydraulic well pump (20) upper piston (24) produce uplift force.Travelling valve 29 is closed, and standing valve 30 is opened, and production fluid flows out well head by last act.Lift top dead-centre on hydraulic well pump (20) upper piston 24, when stroke length was 3 meters, solenoid operated directional valve (15) (16) commutated under the control of the signal of telecommunication that flow meter 2 sends, and the hydraulic oil reservoir that electric-powered pump (12) pumps exists in the accumulator (14).At this moment, pressurized cylinder (19), isolator (21) stop to provide power to underground hydraulic pressure oil well pump (20).Hydraulic well pump (20) upper piston 24 moves downward under the pressure effect of liquid generated underground fluid column, returns bottom dead centre.Travelling valve (29) is opened simultaneously, and standing valve (30) is closed.Production fluid enters plunger case (31) inner chamber of hydraulic well pump (20).Hydraulic well pump (20) upper piston 24 is when moving downward, and isolator 21 is returned on the former road of the annular space of hydrodynamic force liquid between oil pipe and hollow rod.Finish primary oil recovery work, when hydraulic well pump (20) upper piston 24 arrives bottom dead centres, solenoid operated directional valve (15) (16) commutation, electric-powered pump 12 and accumulator (14) simultaneously to pressurized cylinder (19), pressure oil liquid is provided, carry out next working cycles.
The ground hydraulic system is made up of three parts.
Hydraulic pressure and supercharging part: electric-powered pump (12) is 15 kilowatts a volume adjustable hydraulic pump.Electric-powered pump (12) inlet has pipeline to connect the outlet of connected tank (9).Fuel tank has hydraulic oil in (9).Electric-powered pump (12) outlet has high pressure line to connect overflow valve (10) one way valve 11 in parallel.Overflow valve (10) takes back oil pipeline, and the oil return pipeline connects fuel tank (9).One way valve (11) connects two solenoid operated directional valves (15) (16).It is preceding that accumulator (14) is connected solenoid operated directional valve (15) (16).Electronic reversal valve (16) has an interface to connect the low pressure chamber end opening of pressurized cylinder 19; A mouth takes back oil pipeline.In the low pressure chamber of pressurized cylinder (19) piston is arranged, piston is separated into upper and lower two parts with low pressure chamber.Low pressure chamber accumulator (17) and the overflow valve (13) of connecing suitable for reading.The high pressure chest of pressurized cylinder (19) has high pressure line to connect isolator 21 lower hydraulic pressure chambers.Isolator 21 is middle high-pressure bottles that barrier film is arranged, and hydraulic oil and two kinds of liquid of hydrodynamic force liquid is kept apart, and transmit pressure, about 0.4 cubic metre of inner total measurement (volume).To the high pressure line between the isolator (21), be connected to hydraulic control one-way valve (18) at pressurized cylinder 19.
Hydrodynamic force liquid part: dress water in the water tank (8), the volume of water tank (8) is 1.5 cubic metres.Water tank (8) outlet has pipeline to connect electronic fluid infusion pump 7 inlets.Electronic fluid infusion pump (7) is 0.3 kilowatt a centrifugal pump.Electronic fluid infusion pump 7 outlet lines connect hydrodynamic force liquid one end of one way valve 4 and isolator 21.Draw pipeline at electronic fluid infusion pump (7) to the pipeline of one way valve (4) and connect hydraulic control one-way valve (6), again water receiving case (8).Draw pipeline at one way valve 4 to the pipeline of isolator (21) epicoele and connect hydraulic control one-way valve (3) and counterbalance valve (5), the water receiving case 8 again.Isolator 21 power fluids one end has pipeline to connect well head, and hydrodynamic force liquid is transported to hydraulic well pump (20) from the annular space between oil pipe and the hollow rod.In the middle of the pipeline of well head, be in series with flow meter (2) and one-way throttle valve (1) at isolator (21).
The hydraulic control part: electric-powered pump (12) outlet line and oil return pipeline are connected the power mouth P and the oil return inlet T of solenoid operated directional valve (15) respectively, the A mouth of solenoid operated directional valve (15) communicates with the control mouth of hydraulic control ball-and-seat (6), and the B mouth communicates with the control mouth of hydraulic control one-way valve (3) (18).Flow meter (2) control electromagnetic valve (15) (16) work, flow meter has flow transmitter on (2).
Underground hydraulic pressure oil well pump (20) length is 12 meters.As shown in Figure 2.Urceolus 22 internal diameters are 89 millimeters, and standing valve (30), travelling valve (29) adopt ball valve, are original technology.Last cylinder barrel (23) internal diameter is 57 millimeters, and upper piston (24) is slidingly matched with last cylinder barrel 23.Plunger case 31 internal diameters and plunger (32) external diameter are 38 millimeters.There are 3 to set upright step 26 and 1 limited step (28) in the urceolus 22.The dynamic liquid of step (26) of setting upright that power fluid is imported and exported 25 tops passes through the hole.Power fluid is imported and exported setting upright of 25 bottoms seal 27 on the step 26.The quantity that power fluid is imported and exported (25) is 4, and the diameter in hole is 12 millimeters.High voltage power liquid is imported and exported 25 by power fluid and is entered in the cylinder barrel (23) between urceolus (22) and the last cylinder barrel (23), and promotion upper piston 24 moves upward.Upper piston 24 is connected by connecting rod 38 with lower piston (35), and lower piston 35 is connected with plunger (32).Upper piston 24, lower piston 35, connecting rod and plunger (32) centre bore are 24 millimeters.Centre bore is that production fluid is by the passage of lifting.Plunger (32) bottom connects travelling valve 29.Plunger case 31 bottoms are connected and fixed valve 30.Standing valve 30 and travelling valve 29 adopt spherical valve.In urceolus (22) upper end the screw thread that is connected with 3 TBG oil pipes is arranged, it is the screw thread that 42 millimeters hollow rod is connected that last cylinder barrel (23) upper end has with external diameter.There is production fluid to import and export 36 on the connecting rod 38 on lower piston (35) top.Following cylinder barrel (37) bottom has well liquid to import and export 34, has well liquid to import and export 33 on the urceolus 22.
Claims (4)
1, a kind of Rodless hydraulic oil pumping system of the well site that is applied to recover the oil, be by fuel tank (9), electric-powered pump (12), solenoid operated directional valve (15) (16), accumulator (14) (17), overflow valve (10) (13), one way valve (4) (11), pressurized cylinder (19), water tank (8), hydraulic control one-way valve (3) (6) (18), isolator (21) is formed, electric-powered pump (12) inlet has pipeline to connect connected tank (9) outlet, electric-powered pump (12) outlet has high pressure line to connect overflow valve (10) and one way valve (11), overflow valve (10) takes back oil pipeline, the oil return pipeline connects fuel tank, it is characterized in that: one way valve (11) connects two solenoid operated directional valves (15) (16) and accumulator (14), and one of them solenoid operated directional valve (16) has an interface to connect the low pressure chamber end opening of pressurized cylinder (19); An interface takes back oil pipeline, in the low pressure chamber of pressurized cylinder (19) piston is arranged, piston is separated into low pressure chamber, following two parts, interface connects accumulator (17) and overflow valve (13) on the low pressure chamber, the high pressure chest of pressurized cylinder (19) has high pressure line to connect isolator (21) lower hydraulic pressure chamber, pick out hydraulic control one-way valve (18) on the high pressure line, water tank (8) outlet has pipeline to connect electronic fluid infusion pump (7) population, electronic fluid infusion pump (7) outlet has pipeline to connect power fluid one end of one way valve (4) and isolator (21), draw pipeline at electronic fluid infusion pump (7) to the pipeline of one way valve (4) and connect hydraulic control one-way valve (6), and water receiving case (8), draw pipeline at one way valve (4) to the pipeline of isolator (21) and connect hydraulic control one-way valve (3) and counterbalance valve (5), and water receiving case (8), isolator (21) epicoele has pipeline to connect annular space between well head major diameter oil pipe and the minor diameter tubing, the major diameter oil pipe is connected underground hydraulic pressure oil well pump (20) with minor diameter tubing, in the middle of isolator (21) arrives the pipeline of well head, be in series with flow meter (2) and one-way throttle valve (1), electric-powered pump (12) outlet line and oil return pipeline connect solenoid operated directional valve (15) respectively, solenoid operated directional valve (15) connects hydraulic control one-way valve (3) (6) (18) respectively, flow meter (2) control solenoid operated directional valve (15) (16), flow meter has flow transmitter on (2).
2, the underground hydraulic pressure oil well pump (20) that Rodless hydraulic oil pumping system as claimed in claim 1 drove, be by urceolus (22), standing valve (30), travelling valve (29), last cylinder barrel (23), upper piston (24), following cylinder barrel (37), lower piston (35), connecting rod (38), plunger case (31) and plunger (32) are formed, plunger (32) bottom connects travelling valve (29), the bottom of plunger case (31) is connected and fixed valve (30), it is characterized in that: set upright step (26) and limited step (28) in the urceolus (22), top is set upright the dynamic liquid of step (26) and is passed through the hole, the dynamic liquid in last cylinder barrel (23) bottom is imported and exported (25), upper piston (24) is in last cylinder barrel (23), lower piston (35) is in following cylinder barrel (37), lower piston (35) is connected with plunger (32), last lower piston (24) (35), connecting rod (38) and plunger (32) center are porose, plunger case (31) is arranged outside the plunger (32), between upper piston (24) and the lower piston (35) connecting rod (38) is arranged, there is production fluid to import and export (36) on the connecting rod (38) on lower piston (35) top, following cylinder barrel (37) bottom has well liquid to import and export (34), has well liquid to import and export (33) on the urceolus (22).
3, hydraulic well pump as claimed in claim 2 is characterized in that: in urceolus (22) upper end screw thread is arranged, in last cylinder barrel (23) upper end screw thread is arranged.
4, as claim 2 or 3 described hydraulic well pumps, it is characterized in that: importing and exporting setting upright of (25) bottom at power fluid has seal (27) on the step (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03102664 CN1231654C (en) | 2003-02-17 | 2003-02-17 | Rod free hydraulic oil pumping system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03102664 CN1231654C (en) | 2003-02-17 | 2003-02-17 | Rod free hydraulic oil pumping system |
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| CN1450247A CN1450247A (en) | 2003-10-22 |
| CN1231654C true CN1231654C (en) | 2005-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 03102664 Expired - Fee Related CN1231654C (en) | 2003-02-17 | 2003-02-17 | Rod free hydraulic oil pumping system |
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Families Citing this family (17)
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| CN100545414C (en) * | 2003-11-07 | 2009-09-30 | 国际壳牌研究有限公司 | Be used for handling of fluids is injected into method and system in the well |
| CN100395427C (en) * | 2004-07-30 | 2008-06-18 | 中国石化胜利油田有限公司采油工艺研究院 | Oil production method with no pole and oil production system |
| CN100337034C (en) * | 2004-09-14 | 2007-09-12 | 北京迪威尔石油天然气技术开发有限公司 | Hydraulic oil pump |
| CN100337033C (en) * | 2004-09-14 | 2007-09-12 | 北京迪威尔石油天然气技术开发有限公司 | Rodless hydraulic oil pumping system |
| CN102121363A (en) * | 2011-01-17 | 2011-07-13 | 韩兴华 | Single-drive multi-well rodless hydraulic oil extracting device |
| CN103306642B (en) * | 2013-07-01 | 2016-01-20 | 晋中市榆次海洋液压有限公司 | Numerical control and energy saving is without rod beam-pumping unit |
| CN104329060B (en) * | 2014-10-29 | 2017-02-15 | 胜利油田高原石油装备有限责任公司 | Two-well oil extraction hydraulic pumping unit adopting power-assisting oil cylinders and two-well oil extraction method |
| CN105649963A (en) * | 2014-11-24 | 2016-06-08 | 卞康群 | Closed hydraulically driven rodless oil recovery device capable of automatically reversing |
| CN104948148B (en) * | 2015-06-30 | 2018-02-02 | 中国石油大学(华东) | A kind of stepless volume control device |
| CN105464628A (en) * | 2015-12-31 | 2016-04-06 | 中国石油天然气股份有限公司 | Suspension type underground hydraulic rod type pumping production device |
| MX2018013153A (en) * | 2016-04-28 | 2019-03-28 | Hansen Downhole Pump Solutions As | Hydraulically powered downhole piston pump. |
| CN108590631B (en) * | 2018-04-27 | 2023-12-22 | 廊坊市华海石油技术开发有限公司 | Underground pump unit and underground liquid discharge testing system |
| CN108505984B (en) * | 2018-05-29 | 2024-03-08 | 南京聚源隆能源科技有限公司 | Oil well liquid drives pressure boost system |
| CN109555503A (en) * | 2018-12-14 | 2019-04-02 | 高继宗 | A kind of hydraulic energy-accumulating pumping unit |
| CN111379542B (en) * | 2018-12-29 | 2022-05-10 | 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 |
| CN113653468B (en) * | 2021-09-01 | 2023-01-24 | 大庆丹诺石油科技开发有限公司 | Hydraulic direct-drive rodless heating oil production device in well |
| CN115163009B (en) * | 2022-07-06 | 2023-08-18 | 商丘睿控仪器仪表有限公司 | Underground large-volume liquid autonomous pumping and draining system |
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2003
- 2003-02-17 CN CN 03102664 patent/CN1231654C/en not_active Expired - Fee Related
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| CN1450247A (en) | 2003-10-22 |
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