CN109578255B

CN109578255B - Double-structure oil drainage oil well pump

Info

Publication number: CN109578255B
Application number: CN201811276531.8A
Authority: CN
Inventors: 于海山; 杨文敏; 于守东; 张宝忠; 刘勇; 吴错; 张建
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2018-10-30
Filing date: 2018-10-30
Publication date: 2020-04-24
Anticipated expiration: 2038-10-30
Also published as: CN109578255A

Abstract

A double-structure oil-drainage oil pump. The problem that crude oil in a pump barrel and an upper oil pipe cannot be completely discharged during the existing pump detection operation is mainly solved. The method is characterized in that: an impact cylinder (12) is arranged in the fixed valve outer cylinder (9), and an impact claw is arranged on one side of the bottom of the impact cylinder (12); the bottom of the fixed valve outer cylinder (9) is connected with a fixed valve seat pressing cap cover cylinder (17), the inside of the fixed valve seat pressing cap cover cylinder (17) is connected with a fixed valve seat pressing cap (15) through a pin (16), the upper part of the fixed valve seat pressing cap (15) is provided with a fixed valve seat (14), and the upper part of the fixed valve seat (14) is provided with a fixed valve ball (13). By adopting the oil drainage oil well pump with the double structure, when the pump is checked, after the sucker rod and the plunger are lifted out, the fixed valve ball can be opened for oil drainage by selecting the positive pressing operation of the oil pipe, and the fixed valve ball can be opened for oil drainage by selecting the operation of putting in the sucker rod body, so that the dirty oil can not flow out of a shaft, and the resource waste and the safety and environmental protection cost input are reduced.

Description

Double-structure oil drainage oil well pump

Technical Field

The invention relates to the field of oil-well pumps used in oil fields, in particular to a dual-structure oil-drainage oil-well pump.

Background

The oil well pump is an important underground tool for lifting crude oil to the ground, and when the pump is checked, the crude oil in the pump cylinder and the upper oil pipe cannot be discharged, so that the environment-friendly construction investment and the environment-friendly risk are increased when the oil well pump is brought to the ground. The existing devices for realizing the discharge of crude oil in an oil pipe mainly comprise two types, one is that an oil drain device is additionally arranged on a pipe column on a pump or under the pump, and the other is an oil drain pump.

The application of the oil drain device has the following problems: firstly, the oil drainers such as sliding sleeve type and rotary type which are additionally arranged on the pump can not completely realize the discharge of crude oil in the pump cylinder and the oil pipe, and the success rate of mechanical operation is low. And secondly, the impact type oil drain device is additionally arranged below the pump and is influenced by the viscosity of crude oil, the wax deposition condition and the like, and the oil drain device has low oil drain success rate and low oil drain speed. And thirdly, the oil drainage hole of the oil drainer needs to be sealed, is influenced by the underground complicated temperature, pressure and corrosive environment caused by adding medicine, and is easy to have the problem of leakage caused by untight sealing. Fourthly, the cost of additionally installing the oil drain device is high, the popularization investment is large, the consumption is large, the period is long, and the comprehensive application cannot be realized.

The application of the existing oil drain pump has the following problems: firstly, the oil drainage hole is at the draining pump on pump barrel wall upper portion, and the crude oil of its long pump barrel lower part can't be let out completely. And the other is the oil drainage pump of which the throwing rod impacts the oil drainage pin, which is essentially the combination form of an oil well pump and an impact type oil drainage device, and has the problems of low oil drainage success rate and low oil drainage speed of the impact type oil drainage device. Thirdly, the plunger is lowered to rotate the oil drain pump, the operation is realized by mechanically rotating the sucker rod, and the sucker rod is easy to damage; and the rubber material adopted for sealing the oil drainage pore passage is easy to leak under the complex temperature and pressure condition in the pit and the environment of adding chemical agents for viscosity reduction. And fourthly, the oil drainage pump applying the throwing and fishing method not only increases operation procedures and operation cost but also has the problem that the oil drainage pore passage sealed by rubber material is easy to leak under the complex temperature and pressure condition in the pit and the environment of adding chemical agent for viscosity reduction, and the success rate of mechanical fishing is low.

From the reason analysis that causes the unable effluvium of crude oil in pump barrel and the upper portion oil pipe when examining the pump operation, the root lies in the fixed valve ball seat in the oil-well pump standing valve assembly, and the form that can let oil the oil-well pump commonly used at present mainly adopts itself trompil realizes draining to the problem that can let oil of oil-well pump is not solved from the root.

Disclosure of Invention

In order to overcome the defect that crude oil in a pump barrel and an upper oil pipe cannot be completely discharged during the existing pump checking operation, the invention provides the double-structure oil drainage oil well pump.

The technical scheme of the invention is as follows: the double-structure oil drainage oil well pump comprises an upper joint, wherein the bottom of the upper joint is connected with a pump cylinder, the bottom of the pump cylinder is connected with a lower joint, the bottom of the lower joint is connected with an upper joint of a fixed valve, the bottom of the upper joint of the fixed valve is connected with an outer cylinder of the fixed valve, an impact cylinder is arranged in the outer cylinder of the fixed valve, and one side of the bottom of the impact cylinder is provided with an impact claw; the fixed valve seat pressing cap cover is connected to the bottom of the fixed valve outer cylinder, the fixed valve seat pressing cap cover is connected to the inside of the fixed valve seat pressing cap cover through a pin, a fixed valve seat is arranged on the upper portion of the fixed valve seat pressing cap, a fixed valve ball is arranged on the upper portion of the fixed valve seat, and the fixed valve ball is located on the inner side of the impact claw.

And a fixed valve cover is arranged at the upper part of the impact cylinder, and a gasket is arranged between the fixed valve cover and the upper joint of the fixed valve.

The fixed valve is characterized in that axial ribs are arranged on the inner wall of the middle of the outer cylinder of the fixed valve, oil drainage channels are arranged between the ribs, and the top of the fixed valve seat is in contact with the ribs.

The invention has the following beneficial effects: by adopting the scheme, (1) the oil drainage effect is good and no crude oil is left in the pump by ensuring that the fixed valve ball can be opened for oil drainage under any well conditions through two modes, thereby fundamentally solving the problem that the crude oil in the oil pipe and the pump cylinder cannot be completely drained. (2) The oil drainage success rate is high, opens the fixed valve ball at the bottom of the pump through just suppressing or putting in this two kinds of modes of sucker rod body to oil pipe, ensures to realize the draining. (3) The sealing effect is good, the sealing is realized through the precise matching of the fixed valve ball and the fixed valve seat, the sealing ring is not required to be added at the pin, and the influence of underground temperature and pressure conditions and external chemical agents on the sealing is not required to be considered. (4) The pump condition checking and processing work of the oil well pump such as pump holding, well flushing and the like is not influenced. (5) Can be repeatedly used, only needs to replace the impact cylinder or the pin, and does not need to consider the sealing problem.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a fixed valve assembly.

In the figure, 1-an upper joint, 2-an upper oil outlet valve cover, 3-an upper valve ball, 4-an upper valve ball seat, 5-a plunger, 6-a pump barrel, 7-a lower joint, 8-a fixed valve upper joint, 9-a fixed valve outer barrel, 10-a gasket, 11-a fixed valve cover, 12-an impact barrel, 13-a fixed valve ball, 14-a fixed valve seat, 15-a fixed valve seat pressing cap, 16-a pin, 17-a fixed valve seat pressing cap barrel, 18-a fixed valve lower joint and an A-oil drainage channel.

Detailed Description

The invention will be further described with reference to the accompanying drawings in which:

as shown in figures 1 and 2, the double-structure oil drainage oil well pump comprises an upper joint 1, wherein the bottom of the upper joint 1 is connected with a pump barrel 6, a plunger assembly is arranged inside the pump barrel 6, an oil outlet valve cover 2 is arranged inside the plunger assembly, an upper valve ball 3 is arranged inside the oil outlet valve cover 2, an upper valve ball seat 4 is arranged at the bottom of the upper valve ball 3, the upper valve ball seat 4 is connected to the upper oil outlet valve cover 2, and a hollow plunger 5 is connected to the bottom of the upper oil outlet valve cover 2. 6 bottoms of pump barrel are connected with lower clutch 7, and 7 bottoms of lower clutch are connected with solid fixed valve top connection 8, gu fixed valve urceolus 9 is connected to solid fixed valve top connection 8 bottoms, gu fixed valve urceolus 9 is inside to be equipped with striking section of thick bamboo 12, striking 12 upper portions of a section of thick bamboo are equipped with solid fixed valve cover 11, and are equipped with gasket 10 between solid fixed valve cover 11 and the solid fixed valve top connection 8. And one side of the bottom of the impact cylinder 12 is provided with an impact claw which is connected to the bottom of the impact cylinder 12, and the inner side of the joint between the impact claw and the impact cylinder is provided with a groove, so that the impact claw can be bent towards the inner side under the action of external force. The bottom of the fixed valve outer cylinder 9 is connected with a fixed valve seat pressing cap cover cylinder 17, and the bottom of the fixed valve seat pressing cap cover cylinder 17 is connected with a fixed valve lower joint 18. The fixed valve seat pressing cap cover cylinder 17 is internally connected with a fixed valve seat pressing cap 15 through a pin 16, a fixed valve seat 14 is arranged at the upper part of the fixed valve seat pressing cap 15, a fixed valve ball 13 is arranged at the upper part of the fixed valve seat 14, and the fixed valve ball 13 is positioned on the inner side of the impact claw.

Open on the inner wall at fixed valve urceolus 9 middle part has axial bead, forms draining passageway A between the bead, because fixed valve seat 14 top is in the bead bottom, makes draining passageway A bottom by fixed valve seat 14 setting, fixed valve ball 13 can normally set on fixed valve seat 14, and fixed valve ball 13 diameter is greater than the internal diameter of bead department simultaneously, makes fixed valve ball 13 unable through the inside bead of fixed valve urceolus 9. And the fixed valve ball 13 is clamped at the convex edge of the inner wall of the fixed valve outer cylinder 9 after the pin 16 is cut off, and the fixed valve seat 14 and the fixed valve seat pressing cap 15 fall on the fixed valve lower connector 18 together.

When the oil well pump normally runs, the fixed valve ball 13 is normally opened and sealed; when pump operation is examined to needs, the sucker rod plays back with the plunger assembly, and the fixed valve ball can be opened to two kinds of methods: the first method is that the pin 16 is cut off by pressing the oil pipe to a certain pressure, the fixed valve ball 13 is clamped at the convex edge of the inner wall of the fixed valve outer cylinder 9, the fixed valve seat 14 and the fixed valve seat pressing cap 15 fall on the fixed valve lower joint 18 together, the fixed valve ball 13 is separated from the fixed valve seat 14, the crude oil in the pump cylinder 6 and the upper oil pipe is communicated with the oil jacket space through the oil drainage channel A, and the complete oil drainage is realized. The second method is to put in a sucker rod to remove the body of the joint, hit the gasket 10, trigger the hitting claw on the hitting cylinder 12 to push up the fixed valve ball 13 laterally, open the fixed valve ball 13, and realize complete oil drainage.

Claims

1. The utility model provides a dual construction oil-drainage oil-well pump, includes top connection (1), and pump barrel (6) are connected to top connection (1) bottom, and pump barrel (6) bottom is connected with lower clutch (7), and lower clutch (7) bottom is connected with standing valve top connection (8), its characterized in that: the bottom of the fixed valve upper joint (8) is connected with a fixed valve outer cylinder (9), an impact cylinder (12) is arranged inside the fixed valve outer cylinder (9), and one side of the bottom of the impact cylinder (12) is provided with an impact claw; the fixed valve outer cylinder (9) bottom is connected with the standing valve and presses a cap cover section of thick bamboo (17), and standing valve presses cap cover (15) through pin (16) connection inside the cap cover section of thick bamboo (17) of standing valve, and standing valve presses cap (15) upper portion to be equipped with standing valve seat (14), and standing valve seat (14) upper portion is equipped with standing valve ball (13), standing valve ball (13) are located the inboard of striking claw.

2. The dual construction oil drainable pump as defined in claim 1, wherein: and a fixed valve cover (11) is arranged at the upper part of the impact cylinder (12), and a gasket (10) is arranged between the fixed valve cover (11) and the fixed valve upper joint (8).

3. The dual construction oil drainable pump as defined in claim 2, wherein: the inner wall of the middle part of the fixed valve outer cylinder (9) is provided with axial convex edges, an oil drainage channel (A) is arranged between the convex edges, and the top of the fixed valve seat (14) is in contact with the convex edges.