CN216842159U

CN216842159U - Sealed high-efficient sand control oil-well pump

Info

Publication number: CN216842159U
Application number: CN202123222513.1U
Authority: CN
Inventors: 臧璐
Original assignee: Dandong Shunsheng Mechanical Equipment Co ltd
Current assignee: Dandong Shunsheng Mechanical Equipment Co ltd
Priority date: 2021-12-21
Filing date: 2021-12-21
Publication date: 2022-06-28
Anticipated expiration: 2031-12-21

Abstract

The utility model provides a sealed high-efficient sand control oil-well pump, relates to the technical field of oil-well pumps, and comprises a hydraulic motor, an oil outlet valve, an oil outlet pipe, a pump cylinder, a compression spring, a traveling valve ball, a sand blocking block, a long plunger and a fixed valve ball, wherein the sand blocking block is adopted to reduce the pressure difference at the upper end and the lower end of the long plunger, the oil outlet valve is rapidly opened, and sand grains can be prevented from entering the pump cylinder to cause pump blockage after the well is stopped; a sealing ring is arranged between the sand blocking block and the long plunger piston, so that the sealing capability is enhanced, sand is prevented from passing through, the service time of the oil well pump can be prolonged, and the abrasion is reduced; the clearance between the pump barrel and the plunger is enlarged, so that sand grains freely pass through the clearance between the pump barrel and the plunger, and the aim of preventing sand from being stuck is fulfilled; in order to ensure the sealing under the condition of large clearance, a structure of a long plunger and a long pump is adopted, and the length of a sealing segment is increased; the lower traveling valve ball is provided with an ejector rod, a return spring is arranged between the ejector rod and the lower traveling valve ball, the upper stroke and the lower stroke are carried out while the swing of the valve ball is limited, and the valve ball can return quickly.

Description

Sealed high-efficient sand control oil-well pump

Technical Field

The utility model relates to an oil-well pump technical field especially relates to a sealed high-efficient sand control oil-well pump.

Background

The reservoir rock maturity of part of blocks of the oil field site is low, the cementation is loose, and the clay content is high; along with the extension of development time, water injection and steam scouring and the reduction of formation pressure, the rock framework of the reservoir is easy to collapse, and at the moment, clay serving as a cementing material is extracted along with crude oil in the forms of formation sand, fine silt and slurry; at present, the high sand-containing oil well with formation sand, fine silt and slurry produced simultaneously has the characteristics of serious sand production, low pump efficiency and the like in production.

In order to solve the problems of serious sand production and low pump efficiency of the high-sand-content oil well, a sand setting type sand prevention oil well pump is generally adopted for operation at present. The sand-proof oil-well pump can separate sand particles entering the pump barrel from oil under the action of gravity and deposit the sand particles in the sand setting tail pipe. However, for wells with high production rates, the sand settling tailpipe is susceptible to plugging by settling if the settling is done purely. At the moment, the oil well pump needs to be stopped, the pump is checked, and sand grains in the sand setting tail pipe are taken out and put into use; generally speaking, the pump checking period of the existing sand-proof oil well pump is short, and the production benefit is not favorably improved.

In addition, under production conditions, when high-sand-content oil is sucked into the oil well pump along with the reciprocating motion of the plunger, sand moving at high speed in the oil repeatedly impacts key components of a valve ball valve seat, the plunger, a pump barrel and the like of the oil well pump. Once sand is clamped at the joint of the valve ball and the valve seat, the position of the valve ball and the valve seat in sealing contact can be corroded and punctured under the long-term repeated high-speed sand impact, so that the valve ball and the valve seat are not tightly sealed, the pumping efficiency is lowered, even oil is not produced, and finally the oil well yield is greatly reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a sealed high-efficiency sand-proof oil-well pump.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a sealed high-efficiency sand-proof oil well pump comprises a hydraulic motor, an oil outlet valve, an oil outlet pipe, a pump cylinder, a valve cover, a compression spring, an upper traveling valve ball, a sand blocking block, a long plunger, a lower traveling valve ball, a baffle and a fixed valve ball;

the utility model discloses a hydraulic motor, including hydraulic motor, outlet pipe, pump barrel, valve cover, long plunger swing joint in the pump barrel, hydraulic motor bottom fixedly connected with outlet valve, outlet pipe fixed connection is in the outlet valve right-hand member, pump barrel fixed connection is in the outlet valve bottom, valve cover fixed connection is inside the outlet valve, long plunger swing joint in valve cover bottom, baffle swing joint in the inside bottom of pump barrel, fixed valve ball swing joint in baffle bottom.

As a further description of the above technical solution: and a sand blocking block is arranged between the valve cover and the long plunger.

As a further description of the above technical solution: an upper traveling valve ball is arranged in the valve cover, and the top end of the upper traveling valve ball is connected with a compression spring in a clamping mode.

As a further description of the above technical solution: and a sealing ring is arranged between the sand blocking block and the long plunger.

As a further description of the above technical solution: the diameter of the long plunger is half of that of the pump barrel, and the outer wall of the long plunger is of a groove structure.

As a further description of the above technical solution: the downstream valve ball is located the inside bottom of long plunger, and downstream valve ball sets up the ejector pin, is provided with reset spring between ejector pin and the downstream valve ball.

Has the advantages that:

1. the sand blocking block is adopted to reduce the pressure difference between the upper end and the lower end of the long plunger, the oil outlet valve 2 is opened quickly, and sand grains can be prevented from entering the pump cylinder to cause pump blockage after the well is stopped.

2. The sealing ring is arranged between the sand blocking block and the long plunger, so that the sealing capability is enhanced, sand is prevented from passing through, the service time of the oil well pump can be prolonged, and the abrasion is reduced.

3. The clearance between the pump barrel and the plunger is enlarged, so that sand grains freely pass through the clearance between the pump barrel and the plunger, and the aim of preventing sand from being stuck is fulfilled; in order to ensure the sealing under the condition of large clearance, a structure of a long plunger and a long pump is adopted, and the length of the sealing segment is increased.

4. The lower traveling valve ball is provided with an ejector rod, a return spring is arranged between the ejector rod and the lower traveling valve ball, the upper stroke and the lower stroke are carried out while the swing of the valve ball is limited, and the valve ball can return quickly.

Drawings

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

fig. 2 is a schematic diagram of the middle section structure of the present invention.

Illustration of the drawings:

a hydraulic motor 1; an oil outlet valve 2; an oil outlet pipe 3; a pump barrel 4; a valve cover 5; a compression spring 6; an upper swimming valve ball 7; a sand blocking block 8; a long plunger 9; a lower traveling valve ball 10; a baffle plate 11; the valve ball 12 is fixed.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-2, a sealed high-efficiency sand-prevention oil-well pump comprises a hydraulic motor 1, an oil outlet valve 2, an oil outlet pipe 3, a pump cylinder 4, a valve cover 5, a compression spring 6, an upstream valve ball 7, a sand blocking block 8, a long plunger 9, a downstream valve ball 10, a baffle plate 11 and a fixed valve ball 12;

1 bottom fixedly connected with of hydraulic motor goes out oil valve 2, and 3 fixed connection in the 2 right-hand members of oil valve of play oil pipe, 4 fixed connection in the 2 bottom of oil valve of pump barrel, and 5 fixed connection in 2 inside of oil valve of valve cover, long plunger 9 swing joint in 5 bottom of valve cover, baffle 11 swing joint in the inside bottom of pump barrel 4, and fixed valve ball 12 swing joint in baffle 11 bottom.

Wherein, be equipped with between valve cover 5 and the long plunger 9 and keep off sand piece 8, adopt and keep off sand piece 8 and reduce the pressure differential at both ends about the long plunger 9, the delivery valve 2 is opened rapidly, can prevent that the back sand grain of stopping the well from getting into the pump barrel and causing the card pump.

Wherein, the valve cover 5 is inside to be placed and to go up valve ball 7 that moves about, goes up valve ball 7 top joint and has compressed spring 6, when carrying out the upstroke motion, goes up valve ball 7 upwards top towards and makes compressed spring 6 compress, opens oil outlet valve 2.

Wherein, be provided with the sealing washer between fender sand piece 8 and the long plunger 9, strengthen sealing capacity, prevent that the sand grain from passing, can prolong the oil-well pump live time, reduce wearing and tearing.

The diameter of the long plunger 9 is half of that of the pump barrel 4, the outer wall of the long plunger 9 is of a grooved structure, and sand particles freely pass through the gap between the pump barrel 4 and the long plunger 9 by increasing the gap between the pump barrel and the long plunger 9, so that the aim of preventing sand from being stuck is fulfilled; in order to ensure the sealing under the condition of large clearance, a structure of a long plunger and a long pump is adopted, and the length of the sealing segment is increased.

Wherein, downstream valve ball 10 is located the inside bottom of long plunger 9, and downstream valve ball 10 sets up the ejector pin, is provided with reset spring between ejector pin and the downstream valve ball 10, has carried out the up-and-down stroke when having restricted the swing of valve ball, makes the valve ball return fast.

The working principle is as follows: the diameter of the long plunger 9 is half of that of the pump barrel 4, the outer wall of the long plunger 9 is of a grooved structure, sand particles freely pass through the gap between the pump barrel 4 and the long plunger 9 by increasing the gap between the pump barrel 4 and the long plunger 9, so that the aim of preventing sand from being stuck is fulfilled, and in order to ensure the sealing under the condition of large gap, the structure of the long plunger and the long pump barrel is adopted, so that the length of the sealing segment is increased;

the lower traveling valve ball 10 is provided with an ejector rod, a return spring is arranged between the ejector rod and the lower traveling valve ball 10, and the upper stroke and the lower stroke are simultaneously carried out while the swing of the valve ball is limited, so that the valve ball can be quickly returned; the sand blocking block 8 is adopted to reduce the pressure difference between the upper end and the lower end of the long plunger 9, the oil outlet valve 2 is opened rapidly, sand grains can be prevented from entering a pump cylinder to cause pump clamping after the well is stopped, and when the upper stroke movement is carried out, the upper movable valve ball 7 pushes upwards to enable the compression spring 6 to compress, and the oil outlet valve 2 is opened.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A sealed high-efficiency sand-prevention oil well pump comprises a hydraulic motor (1), an oil outlet valve (2), an oil outlet pipe (3), a pump cylinder (4), a valve cover (5), a compression spring (6), an upper traveling valve ball (7), a sand blocking block (8), a long plunger (9), a lower traveling valve ball (10), a baffle plate (11) and a fixed valve ball (12);

the method is characterized in that: hydraulic motor (1) bottom fixedly connected with goes out oil valve (2), go out oil pipe (3) fixed connection in go out oil valve (2) right-hand member, pump barrel (4) fixed connection is in going out oil valve (2) bottom, valve cover (5) fixed connection is inside going out oil valve (2), long plunger (9) swing joint is in valve cover (5) bottom, baffle (11) swing joint is in the inside bottom of pump barrel (4), standing valve ball (12) swing joint is in baffle (11) bottom.

2. The sealed high-efficiency sand-control oil-well pump according to claim 1, characterized in that: and a sand blocking block (8) is arranged between the valve cover (5) and the long plunger (9).

3. The sealed high-efficiency sand-control oil-well pump according to claim 1, characterized in that: an upper moving valve ball (7) is placed inside the valve cover (5), and a compression spring (6) is clamped at the top end of the upper moving valve ball (7).

4. The sealed high-efficiency sand-control oil-well pump according to claim 2, characterized in that: and a sealing ring is arranged between the sand blocking block (8) and the long plunger (9).

5. The sealed high-efficiency sand-control oil-well pump according to claim 1, characterized in that: the diameter of the long plunger (9) is half of that of the pump cylinder (4), and the outer wall of the long plunger (9) is of a grooved structure.

6. The sealed high-efficiency sand-control oil-well pump according to claim 1, characterized in that: the lower traveling valve ball (10) is located at the bottom end inside the long plunger (9), the lower traveling valve ball (10) is provided with an ejector rod, and a return spring is arranged between the ejector rod and the lower traveling valve ball (10).