CN108468639B - Automatic reversing device of oil well liquid-driven reciprocating oil pumping system - Google Patents
Automatic reversing device of oil well liquid-driven reciprocating oil pumping system Download PDFInfo
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- CN108468639B CN108468639B CN201810531394.1A CN201810531394A CN108468639B CN 108468639 B CN108468639 B CN 108468639B CN 201810531394 A CN201810531394 A CN 201810531394A CN 108468639 B CN108468639 B CN 108468639B
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- valve seat
- cavity
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- 239000007788 liquid Substances 0.000 title claims abstract description 140
- 239000003129 oil well Substances 0.000 title claims abstract description 33
- 238000005086 pumping Methods 0.000 title claims abstract description 26
- 239000012530 fluid Substances 0.000 claims abstract description 51
- 238000004146 energy storage Methods 0.000 claims abstract description 22
- 239000003921 oil Substances 0.000 description 53
- 238000010586 diagram Methods 0.000 description 4
- 239000010727 cylinder oil Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical group C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
Classifications
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- 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
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- 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
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/002—Hydraulic systems to change the pump delivery
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
- F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
- F04B9/109—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers
- F04B9/111—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers with two mechanically connected pumping members
- F04B9/113—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers with two mechanically connected pumping members reciprocating movement of the pumping members being obtained by a double-acting liquid motor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Electromagnetic Pumps, Or The Like (AREA)
Abstract
The invention relates to an automatic reversing device of an oil well liquid drive reciprocating oil pumping system, which is matched with an underground automatic reversing single-pipe conveying driving liquid reciprocating oil well oil pumping system. The hydraulic control system comprises a power fluid inlet, a power fluid flow passage, a two-position four-way valve, a piston A, a boosting energy storage spring A, an oil cylinder A, a piston B, a boosting energy storage spring B and an oil cylinder B; the two-position four-way valve comprises a reversing valve core and a reversing valve seat; the middle part of the reversing valve seat is transversely provided with a soft magnetic ring A and a soft magnetic ring B, the interior of the reversing valve seat is divided into an upper cavity, a middle cavity and a lower cavity by the soft magnetic ring A and the soft magnetic ring B, one side of the reversing valve seat is provided with a reversing valve power fluid inlet P, two sliding rods are respectively arranged in sliding mounting holes of the sliding rods arranged on the reversing valve seat, a permanent magnet ring is arranged in the middle cavity of the reversing valve seat and fixed at the middle parts of the two sliding rods, a piston rod sequentially penetrates through the mounting holes of the piston rod, a piston A and a boosting energy storage spring A are arranged at the upper part of the piston rod, and a piston B and a boosting energy storage spring B are arranged at the lower part of the piston rod 21.
Description
Technical Field
The invention relates to an automatic reversing device of an oil well liquid drive reciprocating oil pumping system, which is an automatic reversing device matched with an underground automatic reversing single-pipe driving liquid conveying reciprocating oil well oil pumping system.
Background
The oil well pump driven by liquid pressure has obvious advantages compared with the oil well pump with a rod, and a plurality of companies in China develop the technology for years. For example: application number of hydraulic oil pump designed by China Petroleum and Natural gas group company and China Petroleum group drilling engineering institute: 201210339589.9 this application discloses a hydraulic pump which uses hydraulic pressure as power, two power delivery pipes are connected with two power cylinders in the well, the reversing is electrically reversed from the ground, and the two pipes are alternately injected with power to make the oil pump in the well reciprocate to pump oil and lift the oil to the ground. The defects are that: 1. ground commutation does not have accurate commutation conditions; 2. the two hydraulic pipes are subjected to reversing impact of large pressure difference, so that the power loss is large; 3. the installation difficulty is high, and the required cost is high; 4. the power fluid adopts hydraulic oil to increase the cost.
The invention aims to provide an automatic reversing device of an oil well liquid drive reciprocating oil pumping system aiming at the defects, which is an automatic reversing device of an oil well oil pumping system taking hydraulic pressure as power, accurately controlling reversing positions and enabling an upper piston and a lower piston to reciprocate. And the power medium is produced by using the produced fluid.
The invention relates to an automatic reversing device of an oil well liquid drive reciprocating oil pumping system, which is realized by adopting the following technical scheme: an automatic reversing device of an oil well liquid drive reciprocating oil pumping system comprises a power liquid inlet (driving liquid inlet), a power liquid flow channel (driving liquid flow channel), a two-position four-way valve, a piston A, a boosting energy storage spring A, an oil cylinder A, a piston B, a boosting energy storage spring B and an oil cylinder B.
The two-position four-way valve comprises a reversing valve core and a reversing valve seat. The reversing valve seat is longitudinally provided with a piston rod sliding mounting hole in the middle for mounting the piston rod, and sliding rod sliding mounting holes are respectively formed in two sides of the piston rod sliding mounting hole and are used for mounting the sliding rod. The middle part of the reversing valve seat is transversely provided with a soft magnetic ring A and a soft magnetic ring B, and the soft magnetic ring A and the soft magnetic ring B divide the interior of the reversing valve seat into an upper cavity, a middle cavity and a lower cavity respectively. One side of the reversing valve seat is provided with a reversing valve power fluid inlet P which is communicated with the upper cavity and the lower cavity. The upper part of the other side of the reversing valve seat is provided with a spent power liquid discharge port A, and the lower part of the other side of the reversing valve seat is provided with a spent power liquid discharge port B.
The reversing valve core comprises two sliding rods, a reversing push plate (push ring) A, a reversing push plate (push ring) B (sliding rod retainer), a permanent magnet ring, a liquid inlet valve ball A, a liquid inlet valve ball B, a reversing liquid discharge valve ball A and a reversing liquid discharge valve ball B. The middle parts of the reversing push plate (push ring) A, the reversing push plate (push ring) B and the permanent magnet ring are provided with piston rod mounting holes for mounting the piston rods.
The two sliding rods are respectively arranged in sliding rod sliding mounting holes arranged on the reversing valve seat, the permanent magnet ring is arranged in the middle cavity of the reversing valve seat and fixed in the middle of the two sliding rods, and the liquid inlet valve ball A and the liquid inlet valve ball B are respectively arranged in the upper cavity and the lower cavity of the reversing valve seat and fixed on one sliding rod.
The reversing liquid discharge valve ball A and the reversing liquid discharge valve ball B are respectively arranged at the outer sides of two ends of the reversing valve seat and are fixed on the other slide rod. The reversing push plate (push ring) A and the reversing push plate (push ring) B are respectively and fixedly arranged at the two end parts of the two slide bars.
The piston rod sequentially passes through the middle parts of a reversing push plate (push ring) A, a reversing valve seat, a soft magnetic ring A, a permanent magnet ring, a soft magnetic ring B and a reversing push plate (push ring) B (slide bar retainer), a piston A and a boosting energy storage spring A are arranged on the upper part of the piston rod, a piston B and a boosting energy storage spring B are arranged on the lower part of a piston rod 21, and the piston A and the piston B are respectively fixed at the two end parts of the piston rod.
The two-position four-way valve is installed in the oil cylinder (hydraulic cylinder) A and the oil cylinder (hydraulic cylinder) B together with the piston A, the piston B and the piston rod.
The working cylinder (pump sleeve) can be provided with a plurality of liquid flow channels such as a power liquid channel, a stratum liquid channel, a produced liquid channel and the like, and the spent power liquid and the produced liquid share one flow channel. The piston rod fastens the piston A and the piston B into a whole; the slide bars fasten the reversing push plate (push ring) A, the reversing push plate (push ring) B, the reversing liquid inlet valve ball A, the reversing liquid inlet valve ball B, the reversing liquid outlet valve ball A, the reversing liquid outlet valve ball B and the permanent magnet ring into a reversing valve core, which is called as a jump in description. In order to ensure that the enough large overflow area exists, 6 slide bars are provided, 3 slide bars are provided with a liquid inlet valve ball A and a liquid inlet valve ball B, and 3 slide bars are provided with a liquid outlet valve ball A and a liquid outlet valve ball B. The permanent magnet ring of the reversing valve core (the jump) is a first station when being attracted to the soft magnetic ring A, and the permanent magnet ring is a second station when being attracted to the soft magnetic ring B.
The automatic reversing device of the oil well liquid drive reciprocating oil pumping system is reasonable in design, compact in structure, matched with an underground automatic reversing liquid drive reciprocating oil well pump for use, and capable of accurately controlling reversing positions by using hydraulic pressure as power, and the power medium can be produced by using produced liquid. The liquid-driven reciprocating oil pumping system for the oil well is arranged in the oil well, can be arranged at any depth and any position (a straight well section, an inclined well section, a horizontal section and the like) according to the needs, realizes up and down strokes by utilizing liquid power, has uniform working load, and has low installed power and high power utilization rate.
The automatic reversing device adopts sealing modes such as ball valves, cone valves, end face valves and the like, and can compensate abrasion; the reversing mechanism is arranged in the underground unit, so that reversing response is more timely, the system structure is simplified, and the cost is saved; the upper and lower double power cylinders and the double pumps are symmetrically arranged, so that the system liquid discharge amount is increased, the power system load is uniform, and the power utilization rate is high.
Drawings
The invention will be further described with reference to the accompanying drawings in which:
FIG. 1 is a schematic diagram of the structure and use of an automatic reversing device of an oil well liquid-driven reciprocating oil pumping system;
FIG. 2 is a schematic diagram of a two-position four-way valve of an automatic reversing device of an oil well liquid-driven reciprocating oil pumping system;
FIG. 3 is a schematic diagram of a reversing valve core structure of a two-position four-way valve of an automatic reversing device of an oil well liquid-driven reciprocating oil pumping system;
FIG. 4 is a schematic diagram of a reversing valve seat structure of a two-position four-way valve of an automatic reversing device of an oil well liquid-driven reciprocating oil pumping system.
Detailed Description
Referring to fig. 1-4, an oil well liquid-driven reciprocating oil pumping system comprises a working cylinder (6), an oil cylinder A (9), a piston A (10), a stratum liquid inlet valve A (8), a produced liquid outlet valve A (44), a piston rod (21), an oil cylinder B (23), a piston B (25), a produced liquid outlet valve B (32), a two-position four-way reversing valve (48), an inlet and outlet valve seat A7, a stratum liquid inlet valve A8, a produced liquid outlet valve A44, a stratum liquid runner (stratum liquid supply runner) 26, an inlet and outlet valve seat B31 and a stratum liquid inlet valve B27.
The working cylinder (6) is connected to the lower end of the oil pipe (3) and is arranged in an oil well along with the oil pipe (3), the working cylinder (6) is assembled into a whole through a multi-layer pipe column by connection, the working cylinder is provided with a power fluid flow channel (5), a stratum fluid flow channel (26) and a production fluid and spent power fluid flow channel (35) along with the oil pipe (3) to be lifted in the oil well casing (2) of the stratum (1), and a plurality of fluid flow channels such as a power fluid channel, a stratum fluid channel, a production fluid channel and the like can be provided; all other parts except the working cylinder (6) are assembled into another whole, and can be lifted down along with the small-diameter power fluid oil pipe (3), and the free throwing and the fishing of the fixed pipe column can be realized by adopting the positive and negative circulation of power fluid; the piston A (10) divides the oil cylinder A (9) into a power fluid cavity A (41) and an oil pump cavity A (42); the piston B (25) divides the oil cylinder B (23) into a power fluid cavity B (36) and an oil pump cavity B (34); the piston A (10) and the piston B (25) are connected by a piston rod (21).
An automatic reversing device of an oil well liquid drive reciprocating oil pumping system comprises a power liquid inlet (driving liquid inlet) (4), a power liquid flow channel (driving liquid flow channel) (5), a two-position four-way valve (48), a piston A (10), a boosting energy storage spring A (11), an oil cylinder A (9), a piston B (25), a boosting energy storage spring B (24) and an oil cylinder B (23).
The two-position four-way valve (48) comprises a reversing valve core (47) and a reversing valve seat (14). The longitudinal middle part of the reversing valve seat (14) is provided with a piston rod sliding mounting hole (14-1) for mounting a piston rod (21), and two sides of the piston rod sliding mounting hole (14-1) are respectively provided with a sliding rod sliding mounting hole (14-2) for mounting a sliding rod (13). The middle part of the reversing valve seat (14) is transversely provided with a soft magnetic ring A (16) and a soft magnetic ring B (19), and the soft magnetic ring A (16) and the soft magnetic ring B (19) divide the interior of the reversing valve seat (14) into an upper cavity, a middle cavity and a lower cavity which are respectively an upper cavity (14-4), a middle cavity (14-5) and a lower cavity (14-6). A reversing valve power fluid inlet P (17) is arranged on one side of the reversing valve seat (14), and the reversing valve power fluid inlet P (17) is communicated with the upper cavity and the lower cavity. A spent power fluid discharge port A (39) is arranged at the upper part of the other side of the reversing valve seat (14), and a spent power fluid discharge port B (38) is arranged at the lower part of the other side of the reversing valve seat (14).
The reversing valve core (47) comprises two sliding rods (13), a reversing pushed ring A (12), a reversing pushed ring B (22), a permanent magnet ring (18), a liquid inlet valve ball A (15), a liquid inlet valve ball B (20), a reversing liquid discharge valve ball A (40) and a reversing liquid discharge valve ball B (37). The middle parts of the reversing push plate (push ring) A (12), the reversing push plate (push ring) B (22) and the permanent magnet ring (18) are provided with piston rod (21) mounting holes for mounting the piston rod (21).
The two sliding rods (13) are respectively arranged in sliding rod sliding mounting holes (14-2) formed in the reversing valve seat (14), the permanent magnet ring (18) is arranged in a middle cavity of the reversing valve seat (14) and fixed in the middle of the two sliding rods (13), and the liquid inlet valve ball A (15) and the liquid inlet valve ball B (20) are respectively arranged in an upper cavity and a lower cavity of the reversing valve seat (14) and fixed on one sliding rod (13).
The reversing drain valve ball A (40) and the reversing drain valve ball B (37) are respectively arranged outside two ends of the reversing valve seat (14) and are fixed on the other slide rod (13). The reversing push plate (push ring) A (12) and the reversing push plate (push ring) B (22) are respectively and fixedly arranged at the two end parts of the two slide bars (13).
The piston rod (21) sequentially passes through a reversing push plate (push ring) A (12), a reversing valve seat (14), a soft magnetic ring A (16), a permanent magnet ring (18), a soft magnetic ring B (19) and a reversing push plate (push ring) B (22), wherein piston rod mounting holes are formed in the middle of the piston rod A (10) and the boosting energy storage spring A (11) and are mounted on the upper portion of the piston rod (21), the piston B (25) and the boosting energy storage spring B (24) are mounted on the lower portion of the piston rod (21), and the piston A (10) and the piston B (25) are respectively fixed at two end portions of the piston rod (21).
The two-position four-way valve (48) is arranged in the oil cylinder A (9) and the oil cylinder B (23) together with the piston A (10), the piston B (25) and the piston rod (21).
When the piston A moves to a position close to the bottom dead center, the reversing push plate A is pushed, the reversing push plate A pushes the permanent magnet ring to be separated from the soft magnetic ring A through the sliding rod and is attracted with the soft magnetic ring B, at the moment, power fluid enters the power fluid cavity A, and spent power fluid is discharged out of the power fluid cavity B; when the piston B moves to a position close to the top dead center, the reversing push plate B is pushed, the reversing push plate B pushes the permanent magnet ring to be separated from the soft magnetic ring B through the sliding rod (11) and is attracted with the soft magnetic ring A, at the moment, power fluid enters the power fluid cavity B, and spent power fluid is discharged out of the power fluid cavity A.
The reversing valve seat (14) is provided with a plurality of sliding rod sliding mounting hole seats (14-3) serving as valve seats. The sliding rod sliding mounting hole (14-2) can be used as a liquid through hole.
The reversing valve core (47) is at least provided with two slide bars (13), and the slide bar sliding mounting holes can be used as liquid through holes. In order to ensure that the overflow area is large enough, 6 sliding rods can be arranged in the reversing valve core (47), 3 sliding rods are used for installing the liquid inlet valve ball A and the liquid inlet valve ball B, and 3 sliding rods are used for installing the liquid outlet valve ball A and the liquid outlet valve ball B. The reversing push plate A and the reversing push plate B are respectively and fixedly arranged at two end parts of all six sliding rods.
The valve core of the two-position four-way reversing valve (48) is a valve ball (ball valve), and after the valve ball moves to a dead point position along with the sliding rod, the valve core (valve ball) is seated on a sliding rod sliding mounting hole seat (valve seat) (12-3) arranged on the reversing valve seat (14) to ensure sealing.
The two-position four-way reversing valve (49) is provided with P, A, B, O liquid flow ports, wherein the P port is communicated with power liquid, the A port is communicated with the oil cylinder A (9), the B port is communicated with the oil cylinder B (23), and the O port is a spent power liquid outlet, is communicated with the oil cylinder A (9) and the oil cylinder B (23) and is connected with an oil well produced liquid channel.
The valve core of the two-position four-way reversing valve (48) can be replaced by a cone valve or an end face valve.
The two-position four-way reversing valve (48) adopts a permanent magnet ring (18) to assist reversing, and the permanent magnet ring (18) is attracted with the soft magnetic ring A (16) or the soft magnetic ring B (19) to ensure reversing in place.
The piston A (10) is provided with a boosting energy storage spring A (11), the piston B (25) is provided with a boosting energy storage spring B (24), the impact of the piston on the push plate can be effectively buffered, and the valve core can be pushed to the other dead point position by the energy stored by the boosting energy storage spring after the permanent magnet leaves the soft magnetic ring.
The stratum liquid inlet valve A (8) (the produced liquid inlet valve A (8)), the produced liquid drain valve A (44), the stratum liquid inlet valve B (27) (the produced liquid inlet valve B (27)) and the produced liquid drain valve B (32) are all one-way valves, are forced-closed pump valves, and can meet the requirement that the unit is used in special wells such as inclined wells and horizontal wells.
The automatic reversing device of the oil well liquid drive reciprocating oil pumping system is matched with the oil well liquid drive reciprocating oil pumping system for use, and the following working process is explained: when the reversing valve core is arranged at a station, a reversing liquid inlet valve ball A (15) is opened, a reversing liquid outlet valve ball A (40) is closed, a reversing liquid inlet valve ball B (20) is closed, a reversing liquid outlet valve ball B (20) is opened, power liquid is guided into a power liquid inlet (4) of the oil pump through a conveying pipe by a ground pump station, enters a reversing valve power liquid inlet P (17) through a power liquid flow passage (5) and flows into a reversing valve seat (14), power liquid enters an oil cylinder power liquid cavity B (36) through the opened reversing liquid inlet valve ball A (15) to push a piston A (10) to move upwards, a piston B (25) is driven by a piston rod (21) to move upwards synchronously, stratum liquid drawn in by an oil cylinder oil drain cavity A (42) is discharged into a produced liquid and spent liquid sharing flow passage (35) through a produced liquid drain valve A (produced liquid one-way valve A) (44), and spent liquid in the oil cylinder power liquid in a power liquid cavity B (36) is synchronously moved upwards through an opened reversing liquid drain ball valve B (37) to be discharged to the produced liquid and the power liquid sharing flow passage (35), and the stratum liquid in the stratum liquid drain cavity B (27) is sucked into the stratum liquid outlet valve B (27). The output liquid of the oil cylinder A (9) and the spent power liquid of the oil cylinder B (23) are lifted to the ground through a common flow passage (35). When the piston A (10), the piston rod (21) and the piston B (25) ascend to the vicinity of the upper dead point, the boosting energy storage spring A (11) is compressed and continues to ascend, the piston B (25) pushes the reversing push plate (push ring) B (22), at the moment, the reversing valve core (jump) ascends, the permanent magnet (18) is sucked and kept with the soft magnetic ring A (16), and the reversing is finished (station two). At the moment, the liquid inlet valve ball B (20) is opened, the reversing liquid outlet valve ball B (37) is closed, the liquid inlet valve ball A (15) is closed, the reversing liquid outlet valve ball A (40) is opened, the power liquid enters the power liquid cavity B (36) of the oil cylinder to push the piston B (25) to move downwards, and the piston rod (21) and the piston A (10) move downwards passively and synchronously. Meanwhile, spent power liquid in the oil cylinder power liquid cavity A (41) is discharged into the shared flow passage (35) and lifted, the oil cylinder oil suction and discharge cavity A (42) sucks stratum liquid, and the oil cylinder oil suction and discharge cavity B (34) discharges the sucked stratum liquid to the shared flow passage (35) and lifts under the pushing of the piston B (25). When the piston B (25) descends to the vicinity of the bottom dead center, the boosting energy storage spring A (11) is compressed, the piston continues to descend, the piston A (10) pushes the reversing push plate (push ring) A (12), the reversing valve core (reversing jump) jumps downwards, the permanent magnet ring (18) is sucked and kept with the soft magnetic ring B (19), and the reversing is finished (station I). When the piston A (10), the piston rod (21) and the piston B (25) ascend to the vicinity of the upper dead point, the boosting energy storage spring A (11) is compressed and continues to ascend, the piston B (25) pushes the reversing push plate (push ring) B (22), at the moment, the reversing valve core (jump) ascends, the permanent magnet (18) is sucked and kept with the soft magnetic ring A (16), and the reversing is finished (station two). The oil pump is driven by the power fluid to continuously reciprocate, and simultaneously lifts the produced fluid and the spent power fluid to the ground through the shared flow channel, so that the purpose of pumping stratum fluid by liquid-driven reciprocating automatic reversing is achieved.
Claims (5)
1. An automatic reversing device of an oil well liquid-driven reciprocating oil pumping system is characterized in that: the hydraulic control system comprises a power fluid inlet, a power fluid flow passage, a two-position four-way valve, a piston A, a boosting energy storage spring A, an oil cylinder A, a piston B, a boosting energy storage spring B and an oil cylinder B;
the two-position four-way valve comprises a reversing valve core and a reversing valve seat; the reversing valve seat is provided with a piston rod sliding mounting hole in the longitudinal middle part for mounting the piston rod, and sliding rod sliding mounting holes are respectively formed in two sides of the piston rod sliding mounting hole and are used for mounting the sliding rod;
the middle part of the reversing valve seat is transversely provided with a soft magnetic ring A and a soft magnetic ring B, and the soft magnetic ring A and the soft magnetic ring B divide the interior of the reversing valve seat into an upper cavity, a middle cavity and a lower cavity;
a reversing valve power fluid inlet P is arranged on one side of the reversing valve seat and is communicated with the upper cavity and the lower cavity;
the upper part of the other side of the reversing valve seat is provided with a spent power liquid discharge port A, and the lower part of the other side of the reversing valve seat is provided with a spent power liquid discharge port B;
the reversing valve core comprises two sliding rods, a reversing push plate A, a reversing push plate B, a permanent magnet ring, a liquid inlet valve ball A, a liquid inlet valve ball B, a reversing liquid discharge valve ball A and a reversing liquid discharge valve ball B; the middle parts of the reversing push plate A, the reversing push plate B and the permanent magnet ring are provided with piston rod mounting holes for mounting the piston rods;
the two sliding rods are respectively arranged in sliding mounting holes of the sliding rods arranged on the reversing valve seat, the permanent magnet ring is arranged in a middle cavity of the reversing valve seat and fixed in the middle of the two sliding rods, and the liquid inlet valve ball A and the liquid inlet valve ball B are respectively arranged in an upper cavity and a lower cavity of the reversing valve seat and fixed on one sliding rod;
the reversing liquid discharge valve ball A and the reversing liquid discharge valve ball B are respectively arranged at the outer sides of two ends of the reversing valve seat and are fixed on the other slide rod, and the reversing push plate A and the reversing push plate B are respectively and fixedly arranged at the two ends of the two slide rods;
the piston rod sequentially passes through the middle parts of the reversing push plate A, the soft magnetic ring A, the permanent magnet ring, the soft magnetic ring B and the reversing push plate B, the piston A and the boosting energy storage spring A are arranged on the upper part of the piston rod, the piston B and the boosting energy storage spring B are arranged on the lower part of the piston rod, and the piston A and the piston B are respectively fixed at the two end parts of the piston rod;
the piston A divides the oil cylinder A into a power fluid cavity A and an oil pump cavity A; the piston B divides the oil cylinder B into a power fluid cavity B and an oil pump cavity B; the piston A and the piston B are connected by a piston rod;
when the piston A moves to a position close to the bottom dead center, the reversing push plate A is pushed, the reversing push plate A pushes the permanent magnet ring to be separated from the soft magnetic ring A through the sliding rod and is attracted with the soft magnetic ring B, at the moment, power fluid enters the power fluid cavity A, and spent power fluid is discharged out of the power fluid cavity B; when the piston B moves to a position close to the top dead center, the reversing push plate B is pushed, the reversing push plate B pushes the permanent magnet ring to be separated from the soft magnetic ring B through the sliding rod and is attracted with the soft magnetic ring A, at the moment, power fluid enters the power fluid cavity B, and spent power fluid is discharged out of the power fluid cavity A.
2. An automatic reversing device for a liquid-driven reciprocating oil pumping system of an oil well according to claim 1, wherein: the reversing valve seat is provided with a plurality of sliding rod sliding mounting hole seats serving as valve seats.
3. An automatic reversing device for a liquid-driven reciprocating oil pumping system of an oil well according to claim 1, wherein: the sliding rod sliding mounting hole can be used as a liquid through hole.
4. An automatic reversing device for a liquid-driven reciprocating oil pumping system of an oil well according to claim 1, wherein: the two-position four-way valve is provided with P, A, B, O four fluid flow ports, wherein the P port is communicated with power fluid, the A port is communicated with the oil cylinder A, the B port is communicated with the oil cylinder B, and the O port is a spent power fluid outlet, is communicated with the oil cylinder A and the oil cylinder B and is connected with an oil well produced fluid channel.
5. An automatic reversing device for a liquid-driven reciprocating oil pumping system of an oil well according to claim 1, wherein: the valve core of the two-position four-way valve is replaced by a cone valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810531394.1A CN108468639B (en) | 2018-05-29 | 2018-05-29 | Automatic reversing device of oil well liquid-driven reciprocating oil pumping system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810531394.1A CN108468639B (en) | 2018-05-29 | 2018-05-29 | Automatic reversing device of oil well liquid-driven reciprocating oil pumping system |
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| Publication Number | Publication Date |
|---|---|
| CN108468639A CN108468639A (en) | 2018-08-31 |
| CN108468639B true CN108468639B (en) | 2024-03-22 |
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|---|---|---|---|
| CN201810531394.1A Active CN108468639B (en) | 2018-05-29 | 2018-05-29 | Automatic reversing device of oil well liquid-driven reciprocating oil pumping system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109707605B (en) * | 2018-11-21 | 2020-04-24 | 大连华科机械有限公司 | Improved device based on gas well pressure self-pumping pump |
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| CN202100431U (en) * | 2011-06-13 | 2012-01-04 | 中国海洋石油总公司 | Underground automatic reciprocating fluid plunger pump with large discharging volume |
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| CN108468639A (en) | 2018-08-31 |
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