Integrated whole-barrel type oil well pump with oil drainage connecting-disconnecting function

Abstract

The utility model relates to the technical field of oil well pumps, in particular to an integrated whole-barrel type oil well pump with oil drainage and uncoupling functions, which comprises a pump barrel, the top of the pump barrel is connected with a top oil drainage barrel, a circle of oil drainage holes are formed in the wall of the top oil drainage barrel in a surrounding manner, a sealing mandrel for opening and closing the oil drainage holes is vertically and slidably arranged in the top oil drainage barrel, and a channel is formed in the center of the sealing mandrel. A pull rod is slidably arranged in the channel in a penetrating mode and connected with a driving structure for driving the sealing mandrel to ascend and descend. The oil well pump solves the problem that in the prior art, an oil well pump adopts a connecting-tripping device, a conventional oil drainage device cannot be applied, and therefore a well mouth is prone to being polluted in the operation process.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil well pump technical field, concretely relates to integral whole barrel type oil well pump with oil leakage and disconnecting function. BACKGROUND

[0002] At present, when the small oil pipe is connected with the big pump, such as 73 oil pipe, the lower part is connected with 83 oil well pump, the outer diameter of the oil well pump plunger is 82.55mm, the inner diameter of the 73 oil pipe is 62mm, and the plunger cannot be lowered into the well through the oil pipe, so the plunger is installed in the pump barrel in advance, connected with the oil well rod through the disconnecting device, and the oil extraction function is realized.

[0003] The prior art discloses a patent CN202745714U, which comprises an oil rod bearing, a disconnecting device upper body and a disconnecting device lower body, the disconnecting device lower body is provided with a compression spring, the disconnecting device upper body and the disconnecting device lower body are relatively rotated 90 degrees and connected into an integrated whole under the action of the compression spring, the oil rod bearing is a relatively rotatable device, the oil rod bearing is screw-connected with the upper part of the disconnecting device upper body, or the lower part of the disconnecting device lower body is screw-connected with the oil rod bearing, the disconnecting device upper body and the disconnecting device lower body do not need to rotate the oil rod or the plunger when being connected, therefore, the disconnecting device upper body and the disconnecting device lower body can be relatively rotated 90 degrees when being connected, the compression force of the spring on the disconnecting device lower body can be reduced, the ground can be conveniently inspected, the weight of the oil rod required when being connected in the well is light, and the successful connection in the shallow well can be realized.

[0004] The prior art including the above patent gradually exposes the shortcomings of the technology with the use, mainly as follows:

[0005] Since the oil well pump adopts the disconnecting device, the conventional oil drain cannot be applied, and therefore the wellhead is easily polluted in the operation process.

[0006] In summary, the prior art obviously has inconvenience and defects in actual use, and it is necessary to improve. UTILITY MODEL CONTENT

[0007] In view of the defects in the prior art, the utility model solves the problem that the conventional oil drain cannot be applied since the oil well pump in the traditional technology adopts the disconnecting device, and the wellhead is easily polluted in the operation process.

[0008] To solve the above problems, the utility model provides the following technical scheme:

[0009] Integral whole cylinder type oil well pump with oil leakage and disconnection function, including pump cylinder, the top of the pump cylinder is connected with the top oil leakage cylinder, a circle of oil leakage holes is surrounded on the cylinder wall of the top oil leakage cylinder, a sealing mandrel that can slide vertically in the top oil leakage cylinder is arranged to open and close the oil leakage holes, a channel is arranged in the center of the sealing mandrel, a pull rod is arranged to slide through the channel, and a driving structure that drives the sealing mandrel to ascend and descend is connected to the pull rod.

[0010] As an optimized scheme, the driving structure includes a sucker rod joint fixed to the upper end of the pull rod and a disconnector upper body fixed to the lower end of the pull rod, and the outer diameters of the sucker rod joint and the disconnector upper body are greater than the channel.

[0011] As an optimized scheme, a plurality of locking claws are fixed around the lower end of the sealing mandrel, and a ring groove matched with the locking claws is arranged on the inner wall of the top oil leakage cylinder.

[0012] As an optimized scheme, the cross section of the ring groove is arranged in a trapezoidal shape, and a convex section matched with the ring groove is arranged on the outer wall of the locking claw.

[0013] As an optimized scheme, a ring groove is arranged on the outer wall of the sealing mandrel from top to bottom, and a sealing ring is clamped in the ring groove.

[0014] As an optimized scheme, the upper end of the channel is gradually expanded upward to form an upper guide surface, and the lower end of the channel is gradually expanded downward to form a lower guide surface.

[0015] As an optimized scheme, the top of the pump cylinder is fixed to the top oil leakage cylinder through a disconnector release joint.

[0016] As an optimized scheme, a plunger vertically ascends and descends in the pump cylinder, and a disconnector lower body matched with the disconnector upper body is connected to the top of the plunger.

[0017] As an optimized scheme, a fixed valve is fixed to the lower end of the pump cylinder.

[0018] As an optimized scheme, an upstream movable valve is connected to the position close to the upper end of the plunger, and a downstream movable valve is connected to the position close to the lower end of the plunger.

[0019] As an optimized scheme, an upper joint is connected to the upper end of the top oil leakage cylinder.

[0020] Compared with the prior art, the beneficial effects of the present application are:

[0021] When the upper stroke, the sucker rod drives the plunger up, the outlet valve group is closed, the liquid column above the plunger is lifted to the effective stroke length, and the fixed valve is opened, and the pump liquid enters the pump cavity under the action of pressure.

[0022] The pump is suitable for use of a large pump under a small oil pipe, such as a 73 oil pipe, a lower end of which is connected with a 83 oil pump, the outer diameter of the plunger of the oil pump is 82.55mm, and the inner diameter of the 73 oil pipe is 62mm, so that the plunger cannot be lowered into the well through the oil pipe, and therefore the plunger is installed in the pump barrel in advance, connected with the sucker rod through a disconnecting device, and realizes the oil production function.

[0023] Since the disconnecting device is adopted, the conventional oil drain cannot be applied, and therefore pollution of the wellhead is easily caused in the operation process, and therefore a top oil drain is installed on the pump, the sealing mandrel is installed on the pull rod, and the locking jaw is locked on the top oil drain cylinder, so that the sealing is reliable when the oil is normally produced, the sealing mandrel of the oil drain is released by lifting the pull rod when the oil is drained, the oil drain hole is exposed, and the oil drain function is realized. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the drawings needed to be used in the specific embodiment or the prior art description will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual proportion.

[0025] Figure 1 It is a structural schematic view of the utility model.

[0026] In the drawing: 1-pump barrel; 2-top oil drain cylinder; 3-disconnecting device release joint; 4-sealing mandrel; 5-sealing ring; 6-oil drain hole; 7-locking jaw; 8-ring groove; 9-protruding section; 10-pull rod; 11-sucker rod joint; 12-disconnecting device upper body; 13-disconnecting device lower body; 14-plunger; 15-downstream valve; 16-upstream valve; 17-fixed valve. DETAILED DESCRIPTION

[0027] The embodiments of the technical scheme of the utility model will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the utility model, and therefore only serve as examples, and cannot limit the protection scope of the utility model.

[0028] As Figure 1As shown, the integral barrel type oil pump with oil leakage disengagement function comprises a pump barrel 1, a top oil leakage barrel 2 connected to the top of the pump barrel 1, a ring of oil leakage holes 6 arranged on the barrel wall of the top oil leakage barrel, a sealing mandrel 4 arranged in the top oil leakage barrel to slide vertically and to open and close the oil leakage holes 6, a passage formed in the center of the sealing mandrel 4, and a pull rod 10 arranged in the passage to slide through, and a driving structure connected to the pull rod 10 to drive the sealing mandrel 4 to ascend and descend.

[0029] The driving structure comprises a sucker rod joint 11 fixed to the upper end of the pull rod 10 and a disengager upper body 12 fixed to the lower end of the pull rod 10, and the outer diameters of the sucker rod joint 11 and the disengager upper body 12 are greater than the passage.

[0030] A plurality of locking claws 7 are arranged around the lower end of the sealing mandrel 4, and a ring groove 8 matching the locking claws 7 is formed in the inner wall of the top oil leakage barrel.

[0031] The cross section of the ring groove 8 is arranged in a trapezoidal shape, and a convex section 9 matching the ring groove is arranged on the outer wall of the locking claw 7.

[0032] A ring groove is arranged on the outer wall of the sealing mandrel 4 from top to bottom, and a sealing ring 5 is clamped in the ring groove.

[0033] The upper end of the passage is arranged in a gradually expanding manner to form an upper guide surface, and the lower end of the passage is arranged in a gradually expanding manner to form a lower guide surface.

[0034] The top of the pump barrel 1 is fixed to the top oil leakage barrel 2 through a disengager release joint 3.

[0035] A plunger 14 is arranged in the pump barrel 1 to ascend and descend vertically, and a disengager lower body 13 matching the disengager upper body 12 is connected to the top of the plunger 14.

[0036] A fixed valve 17 is fixed to the lower end of the pump barrel 1.

[0037] An upper movable valve 16 is connected to the position close to the upper end of the plunger 14, and a lower movable valve 15 is connected to the position close to the lower end of the plunger 14.

[0038] An upper joint is connected to the upper end of the top oil leakage barrel 2.

[0039] The structures of the disengager upper body 12 and the disengager lower body 13 are common and are well known to those skilled in the art, and thus are not described in detail.

[0040] The working principle of the device is as follows:

[0041] During the upward stroke, the sucker rod drives the plunger 14 to ascend, the oil outlet valve group is closed, the liquid column above the plunger 14 is lifted by the effective stroke length, the fixed valve 17 is opened, and the pump liquid enters the pump cavity under the action of pressure; during the downward stroke, the fixed valve 17 is closed and the movable valve is opened.

[0042] The pump is suitable for use of small oil pipe under large pump, such as 73 oil pipe, lower connection 83 oil pump, oil pump plunger 14 outer diameter 82.55mm, 73 oil pipe inner diameter 62mm, its plunger 14 cannot pass through the oil pipe to be lowered into the well, so the plunger 14 is installed in the pump barrel 1 in advance, connected with the sucker rod through the disconnecting device, and the oil production function is realized;

[0043] Because the disconnecting device is adopted, the conventional oil drain cannot be applied, so the wellhead is easily polluted during the operation, therefore the top oil drain is installed on the pump upper end, the sealing mandrel 4 is installed on the pull rod 10, the locking jaw 7 is locked on the top drain cylinder 2, the sealing is reliable when the oil is normally produced, the sealing mandrel 4 of the oil drain is released by lifting the pull rod 10 to expose the drain hole 6, and the oil drain function is realized.

[0044] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application.

Claims

1. An integrated, single-cylinder oil pump with oil drain and disconnection function, characterized in that: The utility model provides a pump barrel (1), the top of pump barrel (1) is connected with the top oil drain cylinder (2), a circle of oil drain hole (6) is surrounded on the cylinder wall of top oil drain cylinder, the sealing mandrel (4) that opens and closes oil drain hole (6) is arranged in the vertical sliding of top oil drain cylinder, the center of sealing mandrel (4) is provided with passageway, pull rod (10) is arranged in the sliding of passageway, pull rod (10) is connected with the drive structure of driving sealing mandrel (4) to lift.

2. The integrated cartridge type oil well pump with oil leakage disengaging function according to claim 1, characterized in that: The drive structure includes a sucker rod adapter (11) attached to the upper end of the pull rod (10) and a disconnecter upper body (12) attached to the lower end of the pull rod (10), and the outer diameters of the sucker rod adapter (11) and the disconnecter upper body (12) are both larger than the passageway.

3. The integrated cartridge type oil well pump with oil leakage disengaging function according to claim 2, characterized in that: The lower end of the sealing mandrel (4) is surrounded by a plurality of locking claws (7) attached thereto, and the inner wall of the top oil drain cylinder is provided with a ring groove (8) matching the locking claws (7).

4. The integrated cartridge type oil well pump with oil leakage disengaging function according to claim 3, characterized in that: The cross section of the ring groove (8) is arranged in a trapezoidal shape, and the outer wall of the locking claw (7) is provided with a protruding section (9) matching the ring groove.

5. The integrated cartridge type oil well pump with oil leakage disengaging function according to claim 4, characterized in that: A ring groove is arranged on the outer wall of the sealing mandrel (4) from top to bottom, and a sealing ring (5) is clamped in the ring groove.

6. The integrated cartridge type oil well pump with oil leakage disengaging function according to claim 5, characterized in that: The upper end of the passageway is provided with an upper guide surface in a gradually expanding manner upward, and the lower end of the passageway is provided with a lower guide surface in a gradually expanding manner downward.

7. The integrated cartridge type oil well pump with oil leakage and disengagement functions according to claim 6, characterized in that: The top of the pump barrel (1) is attached to the top oil drain cylinder (2) through a disconnecter release adapter (3).

8. The integrated cartridge type oil well pump with oil leakage and disengagement functions according to claim 7, characterized in that: A plunger (14) is vertically lifted in the pump barrel (1), and the top of the plunger (14) is connected with a disconnecter lower body (13) matching the disconnecter upper body (12).

9. The integrated cartridge type oil well pump with oil leakage and disengagement functions according to claim 8, characterized in that: The lower end of the pump barrel (1) is attached to a fixed valve (17).

10. The integrated cartridge type oil well pump with oil leakage disengaging function according to claim 9, characterized in that: The position close to the upper end of the plunger (14) is connected with an upper movable valve (16), and the position close to the lower end of the plunger (14) is connected with a lower movable valve (15).

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