CN219061959U - Double-plunger test combined pump - Google Patents

Abstract

The utility model relates to the technical field of oil extraction equipment, and particularly discloses a double-plunger test combined pump which comprises a pump barrel, a valve rod, a first plunger assembly, a second plunger assembly, a traveling valve assembly and a sealing assembly, wherein the valve rod, the first plunger assembly and the second plunger assembly are arranged in the pump barrel, the traveling valve assembly and the sealing assembly are arranged at the lower end of the pump barrel, the sealing assembly comprises a locking mandrel, a sealing ring and a locking sealing joint, the locking mandrel is connected to the traveling valve assembly, and the sealing ring is sleeved on the locking mandrel. According to the utility model, the locking sealing joint is connected with the oil pipe and is placed in a preset position in the well, the locking mandrel is inserted into the locking sealing joint to realize sealing, the sealing ring is pressed on the inner wall of the locking sealing joint to realize double sealing, the sealing effect is good, the oil pumping operation of the deep well is suitable through the bottom fixing and double sealing structure, the first plunger assembly and the second plunger assembly are driven by the valve rod, efficient oil pumping can be realized, and the oil pumping device is suitable for pumping oil in a thickened oil well.

Description

Double-plunger test combined pump

Technical Field

The utility model relates to the technical field of oil extraction equipment, in particular to a double-plunger test combined pump.

Background

In order to extract oil from stratum, mechanical equipment is used to extract oil in well to ground in oil extraction process, oil pump is main oil extraction equipment, rod oil pump is more and more widely used due to its characteristics of convenient pump detection operation, short operation time and low cost, conventional rod oil pump adopts a pump barrel top fixing mode, pump barrel bears the composite load of internal pressure and downward stretching of liquid column due to top fixing, the stress condition is severe, during oil extraction, the internal pressure of pump barrel is higher than external pressure, the gap in pump barrel is increased, the leakage loss is increased, and the oil pump is not suitable for deep well use.

Accordingly, there is a need for a dual plunger test combination pump improvement that overcomes the shortcomings of the prior art.

Disclosure of Invention

The utility model aims to solve the problems in the prior art, and provides a double-plunger test combined pump which adopts a bottom fixing and bottom double-sealing mode, changes the stress of a pump cylinder, improves the sealing effect, reduces leakage and improves the oil pumping efficiency.

The technical scheme of the utility model is as follows:

the utility model provides a double plunger test allies oneself with pump, including the pump barrel, the valve rod, first plunger subassembly, the second plunger subassembly, traveling valve subassembly and sealing component, the valve rod, first plunger subassembly and second plunger subassembly all set up inside the pump barrel, first plunger subassembly and second plunger subassembly establish ties and set up the lower extreme at the valve rod, traveling valve subassembly and sealing component from the top down establish ties and set up the lower extreme at the pump barrel, sealing component includes the locking dabber, sealing ring and locking sealing joint, locking dabber's upper end threaded connection is on traveling valve subassembly, locking dabber's lower extreme can be inserted and is established in locking sealing joint, the sealing ring cover is established at locking dabber, sealing ring outer periphery is provided with the toper inclined plane, the toper inclined plane can compress tightly sealedly with locking sealing joint inner wall.

By adopting the structure, the locking sealing joint is connected with the oil pipe, the locking sealing joint is connected with the bottom of the oil pipe column, the bottom is fixed, the sucker rod drives the hydraulic pump to be driven into the oil pipe, the lower end of the locking mandrel is inserted into the locking sealing joint to realize heavy sealing by dead weight, the conical inclined surface of the sealing ring is tightly pressed on the inner wall of the locking sealing joint to realize double sealing, the structure of bottom fixation and double sealing improves the stress of the pump barrel, the pump barrel only bears the external pressure effect and is not influenced by the tensile load caused by the weight of a liquid column, the pump gap change is small, the hydraulic pump is suitable for a deep well and double sealing structure, the tightness is improved, and the valve rod drives the first plunger component and the second plunger component which are arranged in series to reciprocate in the pump barrel and is matched with the opening and closing of the traveling valve component, so that the pumping of the underground oil is realized, and the pumping is more reliable and efficient.

Preferably, the first plunger assembly comprises an upper connecting rod, a first oil outlet connector, an upper plunger, a first valve seat and a first valve ball, wherein the upper end of the upper connecting rod is connected with a valve rod through a first rod connector, the first oil outlet connector, the upper plunger and the first valve seat are sequentially in threaded connection, the upper connecting rod penetrates through the first oil outlet connector, the upper plunger and the first valve seat downwards, the lower end of the upper connecting rod is connected with the first valve ball through a first connecting connector, the upper connecting rod slides in the first oil outlet connector, the upper plunger and the first valve seat, the opening and closing between the first valve seat and the first valve ball can be realized, the upward conveying of oil is realized, the upper connecting rod is driven through the valve rod, the first valve ball is abutted to the first valve seat, the mechanical sealing performance is good, the first plunger assembly can be driven to wholly ascend, and the extraction of underground oil is realized.

Preferably, the second plunger assembly comprises a lower connecting rod, a second oil outlet connector, a lower plunger, a second valve seat and a second valve ball, wherein the upper end of the lower connecting rod is connected with the first connecting connector through a second rod connector, the second oil outlet connector, the lower plunger and the second valve seat are sequentially in threaded connection, the lower connecting rod is downwards penetrated in the second oil outlet connector, the lower plunger and the second valve seat, the lower end of the lower connecting rod is connected with the second valve ball through a second connecting connector, and the lower connecting rod slides in the second oil outlet connector, the lower plunger and the second valve seat to realize opening and closing between the second valve seat and the second valve ball, realize upward conveying of oil and linkage with the first plunger assembly to realize extraction of underground oil.

Preferably, the traveling valve assembly comprises a fixed valve cover, a third valve ball, a third valve seat and a supporting joint, wherein the upper end of the fixed valve cover is in threaded connection with the pump barrel, the supporting joint is in threaded connection with the lower end of the fixed valve cover, the third valve ball and the third valve seat are both arranged in the fixed valve cover and are positioned above the supporting joint, the valve rod drives the first plunger assembly and the second plunger assembly to move upwards during the upward stroke, the third valve ball and the third valve seat are opened, oil enters the pump barrel between the second plunger assembly and the traveling valve assembly through the fixed valve cover, the third valve ball is pressed in the third valve seat during the downward stroke to realize sealing, the oil is conveyed upwards through the first plunger assembly and the second plunger assembly, the position of the third valve seat is locked by the supporting joint, and the installation of the locking mandrel is used.

Preferably, the upper end of the pump barrel is provided with an extension coupling, the upper end of the extension coupling is provided with a pump barrel upper joint, the pump barrel upper joint is sleeved with a centralizing sleeve, the upper end of the pump barrel upper joint is provided with a valve rod guide sleeve, the upper end of the valve rod penetrates out of the pump barrel upper joint and the valve rod guide sleeve to be connected with a valve rod reducing joint, the extension coupling is utilized to extend the pump barrel, the pump barrel joint is utilized to mount the centralizing sleeve and the valve rod guide sleeve, the valve rod guide sleeve is utilized to guide the lifting of the valve rod, the valve rod guide sleeve is connected with the sucker rod, and the valve rod is driven to act, so that the oil pumping operation is realized, the centralizing sleeve plays a role in centralizing the installation of the oil pipe, and the free extension of the oil pipe is ensured.

Preferably, the upper end screw thread of upper portion connecting rod is connected with first latch segment, and first latch segment is close to the below at first pole joint, and the upper end screw thread of lower part connecting rod is connected with the second latch segment, and the second latch segment is close to the below at second pole joint, and the last screw thread of second connection joint is connected with the third latch segment, and the third latch segment sets up in the below of second floater, strengthens the connection between upper portion connecting rod and the first pole joint with first latch segment, strengthens the connection between second pole joint and the lower part connecting rod with the second latch segment, locks the second valve ball on the second connection joint with the third latch segment, prevents to loosen at reciprocating motion in-process to the screw thread of upper portion connecting rod and lower part connecting rod prevents to take place the fracture.

Compared with the prior art, the utility model has the beneficial effects that:

according to the utility model, the locking sealing joint is connected with the oil pipe and is put into a preset position in a well, the oil pumping rod is used for driving the locking mandrel to be inserted into the locking sealing joint to realize sealing, and the sealing ring is tightly pressed on the inner wall of the locking sealing joint to realize double sealing.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model.

1, a valve rod reducing joint; 2. a valve rod guide sleeve; 3. a pump barrel upper joint; 4. lengthening the coupling; 5. a pump cylinder; 6. a valve stem; 7. centralizing sleeve; 8. a first rod joint; 9. an upper link; 10. a first oil outlet joint; 11. an upper plunger; 12. a first valve seat; 13. a first valve ball; 14. a second rod joint; 15. a lower connecting rod; 16. a second oil outlet joint; 17. a lower plunger; 18. a second valve seat; 19. a second valve ball; 20. fixing the valve cover; 21. a third valve ball; 22. a third valve seat; 23. supporting the joint; 24. locking the mandrel; 25. a seal ring; 26. locking the sealing joint; 27. a first locking block; 28. the second locking block; 29. a third locking block; 30. a first connection joint; 31. and a second connection joint.

Detailed Description

In order to make the technical means, technical features, objects and technical effects of the present utility model easy to understand, the present utility model will be further described with reference to the specific drawings.

Referring to fig. 1, a dual plunger test combined pump comprises a pump barrel 5, a valve rod 6, a first plunger assembly, a second plunger assembly, a traveling valve assembly and a sealing assembly, wherein the valve rod 6, the first plunger assembly and the second plunger assembly are all installed inside the pump barrel 5, an extension coupling 4 is connected at the upper end of the pump barrel 5 through threads and used for connecting and extending the pump barrel 5, a pump barrel upper joint 3 is connected at the upper end of the extension coupling 4 through threads, a valve rod guide sleeve 2 is connected at the upper end of the pump barrel upper joint 3 through threads, the upper end of the valve rod 6 sequentially penetrates out of the extension coupling 4, the pump barrel upper joint 3 and the valve rod guide sleeve 2 upwards and is connected with a valve rod reducing joint 1, the valve rod reducing joint 1 can be connected with an oil pumping rod, the valve rod 6 is driven to reciprocate through the oil pumping rod, the valve rod guide sleeve 2 guides the reciprocating motion of the valve rod 6, the valve rod 6 is prevented from swinging in the process, a centering sleeve 7 is sleeved outside the pump barrel upper joint 3, the centering sleeve 7 can be machined outside the centering sleeve 7 into an external centering sleeve structure, the centering sleeve 7 has a small diameter and is further enabled to be in contact with the inner diameter of the pump barrel 6 through the arc-shaped oil pipe, and the arc-shaped inner diameter of the centering sleeve is further reduced;

the traveling valve assembly and the sealing assembly are connected in series at the lower end of the pump cylinder 5 from top to bottom, the traveling valve assembly comprises a fixed valve cover 20, a third valve ball 21, a third valve seat 22 and a supporting joint 23, the upper end of the fixed valve cover 20 is connected to the pump cylinder 5 through threads, the supporting joint 23 is connected to the lower end of the fixed valve cover 20 through threads, the third valve ball 21 and the third valve seat 22 are both positioned in an inner cavity of the fixed valve cover 20 and above the supporting joint 23, the position of the third valve seat 22 is limited through the supporting joint 23, the sealing assembly comprises a locking mandrel 24, a sealing ring 25 and a locking sealing joint 26, when in use, the locking sealing joint 26 is connected to an oil pipe, is connected to the bottom of the oil pipe column and is fixedly connected with the bottom of the oil pipe column, the upper end of the locking mandrel 24 is connected to the supporting joint 23 through threads, the oil pumping rod drives the oil pumping device to be put into an oil pipe, the lower end of the locking mandrel 24 can be inserted into the locking sealing joint 26 under the action of gravity, a first heavy seal is formed between the lower end of the locking mandrel 24 and the locking sealing joint 26, the outer circumference of the locking mandrel 24 is sleeved with a sealing ring 25, the outer circumference of the sealing ring 25 is processed into a conical inclined plane, when the locking mandrel 24 is inserted into the locking sealing joint 26, the conical inclined plane of the locking mandrel 24 can be tightly pressed with the inner wall of the locking sealing joint 26 to form a second heavy seal, the stress of the pump cylinder 5 is improved through a bottom fixing and double sealing structure, the pump cylinder 5 only bears the external pressure effect and is not influenced by the tensile load caused by the weight of a liquid column, the change of a pump gap is small, the oil pumping device is suitable for deep wells, the double sealing structure is improved, and the oil pumping is more reliable and efficient;

the first plunger assembly comprises an upper connecting rod 9, a first oil outlet joint 10, an upper plunger 11, a first valve seat 12 and a first valve ball 13, wherein the upper end of the upper connecting rod 9 is connected with a valve rod 6 through a first rod joint 8, the first rod joint 8 is connected with the upper connecting rod 9 and the valve rod 6 through threads, a first locking block 27 is further connected with the upper end of the upper connecting rod 9, the first locking block 27 is screwed on the upper connecting rod 9 through threads and is abutted against the lower part of the first rod joint 8, the connection firmness of the first rod joint 8 and the upper connecting rod 9 is enhanced through the opposite-to-top threaded connection mode of the first locking block 27 and the first rod joint 8, the first oil outlet joint 10, the upper plunger 11 and the first valve seat 12 are prevented from loosening in the working process, the upper connecting rod 9 is installed in the first oil outlet joint 10, the upper plunger 11 and the first valve seat 12 in a penetrating way, the valve rod 6 can drive the upper connecting rod 9 to slide in the first oil outlet joint 10, the upper plunger 11 and the first valve seat 12 through the first rod joint 8, the lower end of the upper connecting rod 9 is connected with the first valve ball 13 through the first connecting joint 30, the upper connecting rod 9 slides to drive the first valve ball 13 to be far away from and close to the first valve seat 12, the opening and closing of a channel between the first valve seat 12 and the first valve ball 13 are realized, the first valve ball 13 reliably seals on the first valve seat 12 in a mechanical way, the sealing performance is good, the valve rod 6 moves downwards when in a downward stroke, the upper connecting rod 9 slides downwards to drive the first valve ball 13 to be far away from the first valve seat 12, the channel between the first valve ball 13 and the first valve seat 12 is opened, and the first oil outlet joint 10, the upper plunger 11 and the first valve seat 12 are driven to move downwards integrally when the upper connecting rod 9 slides downwards until the first locking block 27 contacts with the upper surface of the first oil outlet joint 10, the oil below the first valve seat 12 flows into the cavity of the upper plunger 11 through the channel between the first valve ball 13 and the first valve seat 12, and when in an upward stroke, the valve rod 6 moves upwards, the upper connecting rod 9 slides upwards to drive the first valve ball 13 to be pressed on the first valve seat 12, so that the first valve seat 12, the upper plunger 11 and the first oil outlet joint 10 are driven to move upwards, the oil in the cavity of the upper plunger 11 enters an oil pipe through an opening of the first oil outlet joint 10, and the oil is circularly reciprocated to finish the work of pumping the oil from the underground to the ground;

the second plunger assembly comprises a lower connecting rod 15, a second oil outlet joint 16, a lower plunger 17, a second valve seat 18 and a second valve ball 19, wherein the upper end of the lower connecting rod 15 is in threaded connection with a first connecting joint 30 through a second rod joint 14, the second oil outlet joint 16, the lower plunger 17 and the second valve seat 18 are in threaded connection in sequence, the lower connecting rod 15 is installed in the second oil outlet joint 16, the lower plunger 17 and the second valve seat 18 in a penetrating mode, the lower end of the lower connecting rod 15 is in threaded connection with the second valve ball 19 through a second connecting joint 31, a second locking block 28 is in threaded connection with the upper end of the lower connecting rod 15, the second locking block 28 is screwed on the lower connecting rod 15 and is tightly abutted to the lower part of the second rod joint 14, the stability of the connection of the second rod joint 14 and the lower connecting rod 15 is enhanced through a butt-joint threaded mode of the second locking block 28 and the second rod joint 14, loosening is prevented in the working process, the second plunger assembly and the first plunger assembly work in the same as the first plunger assembly, the second plunger assembly is not in operation, the second locking block is in principle connected with the second locking block 19, and the third locking block is in threaded connection with the second locking block 29 is in threaded connection with the second locking block 19.

During the use, during the upstroke, valve rod 6 drives first plunger subassembly and second plunger subassembly and goes upward, and third valve ball 21 and third valve seat 22 are opened, and in the fluid got into pump barrel 5 between second plunger subassembly and the traveling valve subassembly through fixed valve bonnet 20, during the downstroke, third valve ball 21 and third valve seat 22 were closed, realized sealedly, and the fluid was carried through first plunger subassembly and second plunger subassembly upwards, flowed into in the oil pipe to by the extraction to ground.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the present utility model. Equivalent changes and modifications of the utility model are intended to fall within the scope of the present utility model.

Claims (6)

1. A dual plunger test tandem pump, characterized by: including pump cylinder (5), valve rod (6), first plunger subassembly, second plunger subassembly, traveling valve subassembly and sealing component, valve rod (6), first plunger subassembly and second plunger subassembly all set up inside pump cylinder (5), first plunger subassembly and second plunger subassembly establish ties and set up the lower extreme at valve rod (6), traveling valve subassembly and sealing component from the top down establish ties the lower extreme at pump cylinder (5), sealing component includes locking dabber (24), sealing ring (25) and locking sealing joint (26), the upper end threaded connection of locking dabber (24) is on traveling valve subassembly, and the lower extreme of locking dabber (24) can be inserted and establish in locking sealing joint (26), sealing ring (25) cover is established on locking dabber (24), and sealing ring (25) outer periphery is provided with the toper inclined plane, toper inclined plane can compress tightly sealedly with locking sealing joint (26) inner wall.

2. The dual plunger test tandem pump of claim 1 wherein: the first plunger assembly comprises an upper connecting rod (9), a first oil outlet joint (10), an upper plunger (11), a first valve seat (12) and a first valve ball (13), wherein the upper end of the upper connecting rod (9) is connected with a valve rod (6) through a first rod joint (8), the first oil outlet joint (10), the upper plunger (11) and the first valve seat (12) are sequentially in threaded connection, the upper connecting rod (9) is downwards arranged in the first oil outlet joint (10), the upper plunger (11) and the first valve seat (12) in a penetrating mode, and the lower end of the upper connecting rod (9) is connected with the first valve ball (13) through a first connecting joint (30).

3. The dual plunger test tandem pump of claim 2 wherein: the second plunger assembly comprises a lower connecting rod (15), a second oil outlet joint (16), a lower plunger (17), a second valve seat (18) and a second valve ball (19), wherein the upper end of the lower connecting rod (15) is connected with a first connecting joint (30) through a second rod joint (14), the second oil outlet joint (16), the lower plunger (17) and the second valve seat (18) are sequentially connected in a threaded mode, the lower connecting rod (15) is downwards arranged in the second oil outlet joint (16), the lower plunger (17) and the second valve seat (18) in a penetrating mode, and the lower end of the lower connecting rod (15) is connected with the second valve ball (19) through a second connecting joint (31).

4. The dual plunger test tandem pump of claim 1 wherein: the traveling valve assembly comprises a fixed valve cover (20), a third valve ball (21), a third valve seat (22) and a supporting joint (23), wherein the upper end of the fixed valve cover (20) is in threaded connection with a pump cylinder (5), the supporting joint (23) is in threaded connection with the lower end of the fixed valve cover (20), and the third valve ball (21) and the third valve seat (22) are both arranged in the fixed valve cover (20) and are located above the supporting joint (23).

5. The dual plunger test tandem pump of claim 1 wherein: the upper end of pump barrel (5) is provided with extension coupling (4), the upper end of extension coupling (4) is provided with pump barrel upper portion joint (3), the cover is equipped with on pump barrel upper portion joint (3) and right cover (7), and the upper end of pump barrel upper portion joint (3) is provided with valve rod uide bushing (2), and pump barrel upper portion joint (3) and valve rod uide bushing (2) are worn out to the upper end of valve rod (6) are connected with valve rod reducing joint (1).

6. A dual plunger test tandem pump according to claim 3, wherein: the upper end threaded connection of upper portion connecting rod (9) has first latch segment (27), and first latch segment (27) are close to the below at first pole joint (8), and the upper end threaded connection of lower part connecting rod (15) has second latch segment (28), second latch segment (28) are close to the below at second pole joint (14), and threaded connection has third latch segment (29) on second attach fitting (31), third latch segment (29) set up the below at second valve ball (19).

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