CN211397861U

CN211397861U - Controllable bottom valve of pumping well tubular pump

Info

Publication number: CN211397861U
Application number: CN201921828375.1U
Authority: CN
Inventors: 黄煦; 王起晶; 顾荣军; 赵军; 白瑞义
Original assignee: China Petroleum and Chemical Corp; Sinopec Shengli Oilfield Co Gudong Oil Extraction Plant
Current assignee: China Petroleum and Chemical Corp; Sinopec Shengli Oilfield Co Gudong Oil Extraction Plant
Priority date: 2019-10-29
Filing date: 2019-10-29
Publication date: 2020-09-01
Anticipated expiration: 2029-10-29

Abstract

The utility model provides a casing of controllable bottom valve of pumping well tubular pump is cylindric, the upper and lower both ends are equipped with the external screw thread respectively, the centre is equipped with supports the overfall board, the upper portion that supports the overfall board is equipped with the spring, locking piece depression bar and retaining ring and goes up the jump ring, the lower part of locking piece is equipped with well core rod, well core rod's lower part passes the spring in proper order, support the overfall board, well spring, go up the valve ball, go up the disk seat, well cover, lower spring holder, lower spring, well core rod's lower extreme is pegged graft with lower valve ball activity, lower valve ball sits on lower disk seat, be equipped with down the jump ring below the lower disk seat, below supporting the overfall board, be equipped with. The utility model discloses an automatic flexible locking mechanism puts one through plunger pump plunger and carries, has realized that the bottom valve closes and opens, need annotate special borehole operation such as vapour, hot washing, sand washing, flowing back when the oil well, and need not propose or change the tubular column and can accomplish, practice thrift the working cost, improve work efficiency and pump efficiency, increase crude oil output.

Description

Controllable bottom valve of pumping well tubular pump

Technical Field

The utility model relates to a mechanical oil production equipment is specifically a controllable bottom valve of oil pumping well tubular pump.

Background

At present, a tubular pump is mainly adopted for lifting crude oil in an oil field, but a common tubular pump mainly comprises a pump barrel, a plunger, a bottom valve (a fixed valve, a traveling valve) and the like, but the conventional common bottom valve has low efficiency in oil pumps of horizontal wells and inclined wells, poor valve wear resistance and easy damage of a valve cover, and particularly, measures such as well washing, acidification, paraffin removal and the like cannot be carried out after the pump is put into the pump, and oil drainage cannot be carried out during operation. The fixed bottom valve of oil-well pump is mostly the check valve, and the fluid can only be from up flowing into the pump barrel down, and during special operations such as sand washing, well-flushing, need inject liquid downwards through oil pipe, and current oil-well pump bottom valve does not have the fluid injection function, can only play production string or replacement tubular column during special operations, and work load increases, and the operating cost increases.

A multifunctional oil pump bottom valve, patent number: 03213526.2, it is composed of long and short tracks, valve ball opening and lifting, and internal mechanism locking, according to the principle of long and short tracks, it adopts long and short tracks, valve cover lifting sliding sleeve and internal mechanism locking, through lifting or lowering the sucker rod on the ground well mouth to realize the opening and closing of the oil pump fixed bottom valve, when the bottom valve is closed, it can carry on normal oil production, after the bottom valve is opened and locked, it can carry on special downhole operations such as steam injection, hot washing (positive back washing), sand washing, liquid discharging, etc., without changing the pipe column. However, the device has many parts and complex structure, three groups of springs for unlocking, tensioning and resetting participate in controlling the state of the bottom valve, and the whole device is easy to fail due to the failure of a certain part during operation.

An oil-well pump bottom valve control device, patent number: 200920246243.8, in order to overcome the defects of the prior control device that the parts are many, the structure is complex, and the control is easy to fail, the utility model discloses the bottom valve control device of the oil well pump is arranged between the plunger assembly and the bottom valve; the track grooves on the outer circumference of the reversing sliding sleeve of the control device are of a continuous Y-shaped structure and are uniformly distributed along the circumference, one end of the guide pin is positioned in the track groove of the reversing sliding sleeve, the upper end of the short section is fixedly connected with the pump cylinder through a coupling, the outer circle in the middle of the short section is fixedly connected with the upper end of the outer cylinder, and the lower end of the short section, the connecting cylinder and the bottom valve bonnet are sequentially and fixedly connected; an annulus is arranged among the lower part of the short section, the connecting cylinder, the bottom valve and the inner hole of the outer cylinder; a return spring above the boss in the valve bonnet of the bottom valve, a reversing sliding sleeve, an impact sleeve and a limiting sleeve are sequentially installed from bottom to top, and the limiting sleeve is fixedly connected with the short section. However, the device is a fixed bottom valve, and still has the problem of poor sealing performance.

Disclosure of Invention

The utility model aims at the weak point that exists to the aforesaid, design a controllable bottom valve of pumping well tubular pump.

The utility model discloses the purpose is realized through following technical scheme:

the utility model discloses a: the device comprises a shell, an upper snap spring, a retainer ring, a pressure rod, a guide rail, a locking piece, an upper spring, a central rod, a supporting overflowing plate, a central spring seat, a central spring, an upper valve ball, a sealing ring, an upper valve seat, a middle sleeve, a lower spring seat, a lower spring, a lower valve ball, a lower valve seat and a lower snap spring; the method is characterized in that: the casing is cylindric, and upper and lower both ends are equipped with the external screw thread respectively, and the centre is equipped with supports the overfall board, and the upper portion that supports the overfall board is equipped with the spring, locking piece depression bar and retaining ring and goes up the jump ring, and the lower part of locking piece is equipped with well core rod, and well core rod's lower part passes the spring in proper order, supports the overfall board, well spring, go up the valve ball, go up the disk seat, middle cover, lower spring holder, lower spring, well core rod's lower extreme and lower valve ball activity grafting, and lower valve ball sits on the disk seat down, is equipped with down the jump ring below the disk seat down, below supporting the overfall board, is equipped with fixed.

The upper end and the lower end of a central hole of a shell in a controllable bottom valve of a tubular pump of a preferred pumping well are respectively provided with an internal thread, the outer edge of each internal thread is provided with an annular groove, the internal thread at the upper end is in threaded connection with a check ring, an upper snap spring is arranged in the upper annular groove to lock the check ring, three guide rails parallel to a central line are uniformly distributed on the inner wall of the central hole of the lower shell of the check ring in the circumferential direction, the internal thread at the lower end is in threaded connection with a lower valve seat, and a lower snap spring is.

The lower part of a pressure lever in the controllable bottom valve of the optimized oil pumping well tubular pump is provided with three zigzag arc upper teeth, the center of the pressure lever is provided with a cylindrical blind hole, six upper slideways parallel to the central line are uniformly distributed in the circumferential direction of the excircle, wherein the three slideways are used as produced liquid channels, and the size of each upper slideway is larger than that of each guide rail.

The upper part of a locking piece in the controllable bottom valve of the optimized pumping well tubular pump is provided with three zigzag arc lower teeth, the center of the locking piece is provided with a cylinder, the diameter of the cylinder is smaller than the size of a central blind hole at the lower part of a pressure rod, six lower slideways parallel to a central line are uniformly distributed on the outer circumference of the locking piece, three of the slideways are used as produced liquid channels, and the size of the lower slideways is larger than that of a guide rail.

The upper teeth of the pressure lever in the controllable bottom valve of the oil pumping well tubular pump are matched with the lower teeth of the locking piece, the upper slideway corresponds to the lower slideway, the cylinder of the locking piece is inserted into the blind hole of the pressure lever, the upper slideway is matched with the lower slideway and the guide rail, and the upper spring of the lower central rod of the locking piece forms an automatic telescopic locking mechanism.

The upper end of a central rod in the controllable bottom valve of the preferable oil pumping well tubular pump is provided with external threads, and the lower end of the central rod is provided with an annular boss.

The supporting overflowing plate in the controllable bottom valve of the oil pumping well tubular pump is preferably cylindrical and fixedly arranged in the middle of the shell, a through hole larger than the central rod is formed in the center of the shell, and 3-6 upper overflowing holes are uniformly distributed outside the through hole.

The upper valve ball in the controllable bottom valve of the preferred pumping well tubular pump is hemispherical, the center of the upper valve ball is provided with a through hole larger than the center rod, and a sealing ring is arranged in the through hole.

The upper valve seat in the controllable bottom valve of the preferred pumping well tubular pump is cylindrical, a horn-shaped through hole is formed in the center, the diameter of the through hole is larger than that of the middle sleeve, the annular flow area is equal to that of the lower flow passage, and the upper valve seat is fixedly arranged between the supporting flow passing plate and the lower valve seat of the shell.

The lower valve ball in the controllable bottom valve of the preferred pumping well tubular pump is hemispherical, the upper part of the lower valve ball is provided with a cylinder, the diameter of the cylinder is larger than that of the central rod, the upper end of an inner hole is provided with an annular boss which is matched with the central rod to hang the lower end of the central rod to prevent the lower end of the central rod from falling off, and a certain distance is reserved between the lower end of the central rod and the lower valve ball.

The working principle is as follows: the automatic telescopic locking mechanism is similar to the physical analysis of the stress of an object placed on the inclined plane, and the object is subjected to external force to overcome static friction force and move. The automatic telescopic locking mechanism utilizes the inclined plane to slide and drives the locking piece to rotate, so that the pump valve can extend or retract.

After the plunger of the oil well pump presses the pressure rod downwards, in the process of rising again, the locking piece rotates rightwards along the inclined plane under the action of the elastic force of the upper spring, then the guide rail falls into the lowest point of the adjacent lower teeth along the upper slide way, the locking of the extending pump valve is realized, and the oil well pump enters a working state.

When the plunger pushed down the depression bar once more, the in-process that rises afterwards, the locking piece turns right along contact surface (inclined plane) once more under the effect of last spring elasticity, then the guide rail falls into the adjacent slide of locking piece, it is corresponding with the lower slide to go up the slide this moment, and the locking piece rises, realizes the pump valve withdrawal, overflows the passageway and opens, and the oil-well pump can carry out measures operations such as well-flushing, acidizing, paraffin removal.

The beneficial effects of the utility model are that, reasonable in design, simple structure is convenient for make, especially adopts automatic flexible locking mechanism, puts one through the oil-well pump plunger and carries, has realized closing and opening of bottom valve, need annotate special borehole operation such as vapour, hot washing (positive backwash), sand washing, flowing back when the oil well, and need not propose or change the tubular column and can accomplish, practice thrift the working cost, improve work efficiency. During normal production, the upper valve ball and the lower valve ball are respectively under the action of the middle spring and the lower spring, and are closed rapidly when the piston moves downwards, so that the sealing effect is good, the pump efficiency is improved, and the crude oil yield is increased.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for helping the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. Under the guidance of the present invention, those skilled in the art can select various possible shapes and proportional sizes according to specific situations to implement the present invention.

Fig. 1-the utility model discloses main view full section structure sketch map.

Fig. 2-the utility model discloses automatic flexible locking mechanism axle side structure locking state schematic diagram.

Fig. 3-schematic view of the shaft side structure release state of the automatic telescopic locking mechanism of the present invention.

The labels in the figures are: 1. the shell is provided with a clamp spring 2, a retainer ring 3, a pressure rod 4 and upper teeth 4-1; 5. a guide rail, 6, a locking piece, 6-1, lower teeth; 7. the valve comprises an upper spring, 8 a central rod, 9 a supporting flow passing plate, 10 a middle spring seat, 11 a middle spring, 12 an upper valve ball, 13 a sealing ring, 14 an upper valve seat, 15 a middle sleeve, 16 a lower spring seat, 17 a lower spring, 18 a lower valve ball, 19 a lower valve seat and 20 a lower snap spring; SD. upper slide, XD. lower slide, SG. upper flow channel, DG. middle flow channel, XG. lower flow channel.

Detailed Description

In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment(s) may be practiced without these specific details.

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

as shown in fig. 1, 2, and 3:

embodiment 1, the utility model discloses by casing 1, go up jump ring 2, retaining ring 3, depression bar 4, guide rail 5, locking piece 6, go up spring 7, center rod 8, support overfire board 9, well spring seat 10, well spring 11, go up ball 12, sealing washer 13, go up valve seat 14, middle cover 15, lower spring seat 16, lower spring 17, lower ball 18, lower valve seat 19, lower jump ring 20 and constitute; the method is characterized in that: the casing 1 is cylindrical, external threads are arranged at the upper end and the lower end of the casing respectively, a supporting overflowing plate 9 is arranged in the middle of the casing, an upper spring 7, a locking piece 6, a pressure rod 4, a retainer ring 3 and an upper clamp spring 2 are arranged on the upper portion of the supporting overflowing plate 9, a central rod 8 is arranged on the lower portion of the locking piece 6, the upper spring 7, the supporting overflowing plate 9, a middle spring 11, an upper valve ball 12, an upper valve seat 14, a middle sleeve 15, a lower spring seat 16 and a lower spring 17 sequentially penetrate through the lower portion of the central rod 8, the lower end of the central rod 8 is movably connected with a lower valve ball 18 in an inserting mode, the lower valve ball 18 is seated on the lower valve seat 19, a lower clamp spring 20 is arranged below the lower valve seat 19, and a fixed middle spring seat.

The upper end and the lower end of a central hole of the shell 1 are respectively provided with an internal thread, the outer edge of the internal thread is respectively provided with an annular groove, the internal thread at the upper end is in threaded connection with the retainer ring 3, the upper clamp spring 2 is arranged in the upper annular groove to lock the retainer ring 3, the inner wall of the central hole of the lower shell 1 positioned on the retainer ring 3 is circumferentially and uniformly provided with three guide rails 5 parallel to a central line, the internal thread at the lower end is in threaded connection with the lower valve seat 19, and the lower clamp spring 20 is arranged in the lower annular.

The lower part of the pressure lever 4 is provided with three zigzag arc upper teeth 4-1, the center is provided with a cylindrical blind hole, six upper slideways SD parallel to the central line are uniformly distributed in the circumferential direction of the outer circle, and the size of each upper slideway SD is larger than that of the guide rail 5.

The upper part of the locking piece 6 is provided with three zigzag arc lower teeth 6-1, the center is provided with a cylinder, the diameter of the cylinder is smaller than the size of a central blind hole at the lower part of the pressure lever 4, six lower slideways XD parallel to the central line are uniformly distributed in the circumferential direction of the outer circumference, and the size of each lower slideway XD is larger than that of the guide rail 5.

The upper teeth 4-1 of the pressure lever 4 are matched with the lower teeth 6-1 of the locking piece 6, the upper slideway SD corresponds to the lower slideway XD, the cylinder of the locking piece 6 is inserted into the blind hole of the pressure lever 4, the upper slideway SD and the lower slideway XD are matched with the guide rail 5, and an automatic telescopic locking mechanism is formed by an upper spring 7 of a lower central rod 8 of the locking piece 6.

The upper end of the central rod 8 is provided with an external thread, and the lower end of the central rod is provided with an annular boss.

The supporting overflowing plate 9 is cylindrical and is fixedly arranged in the middle of the shell 1, a through hole larger than the central rod 8 is formed in the center of the supporting overflowing plate, and 3-6 upper overflowing holes SG are uniformly distributed outside the through hole.

The upper valve ball 12 is hemispherical, a through hole larger than the central rod 8 is formed in the center of the upper valve ball, and a sealing ring 13 is arranged in the through hole.

The upper valve seat 14 is cylindrical, a horn-shaped through hole is formed in the center of the upper valve seat, the diameter of the through hole is larger than that of the middle sleeve 15, the annular overflowing area is equal to that of the lower overflowing channel XG, and the upper valve seat 14 is fixedly arranged between the supporting overflowing plate 9 and the lower valve seat 19 of the shell 1.

The lower valve ball 18 is hemispherical, a cylinder is arranged on the upper portion of the lower valve ball 18, the diameter of the cylinder is larger than that of the central rod 8, an annular boss is arranged at the upper end of an inner hole and matched with the central rod 8, the lower end of the central rod 8 is hung to prevent the lower end of the central rod from being separated, and a certain distance is reserved between the lower end of the central rod 8 and the lower valve ball 18.

Example 2

When the controllable bottom valve of the pumping well tubular pump is used, the original pump bottom valve is detached and connected with an oil well pump, and the lower part of the controllable bottom valve of the pumping well tubular pump is connected with a tail pipe and is lowered to a production layer.

After the plunger of the oil well pump presses the pressure rod 4 downwards, in the process of rising again, the locking piece 6 rotates rightwards along the inclined plane under the action of the elastic force of the upper spring 7, then the guide rail 5 falls into the lowest point of the adjacent lower teeth 6-1 along the upper slide way SD, the extending locking of the pump valve is realized, and the oil well pump enters a working state. When the plunger moves upwards, the lower valve ball 18 and the upper valve ball 12 are opened under the action of negative pressure, and when the plunger moves downwards, the lower valve ball 18 and the upper valve ball 12 are quickly closed under the action of the middle spring and the lower spring, so that the normal work of the oil well pump is realized. The pump plunger pushes down depression bar 4 once more, the in-process that rises afterwards, locking piece 6 is under the effect of upper spring 7 elasticity, turn right along contact surface (inclined plane) once more and rotate, then guide rail 5 falls into the adjacent slide of locking piece, it is corresponding with lower slide XD to go up slide SD this moment, locking piece 4 rises, realize the pump valve withdrawal, the passageway that overflows is opened, the oil-well pump can carry out measures operation such as well-flushing, acidizing, paraffin removal, and need not propose or change the tubular column and can accomplish, thereby reach saving the working cost, improve work efficiency, oil well normal production, improve the pump efficiency, the purpose of increasing crude oil output.

The above description is only an example of the present invention, and is not intended to limit the scope of the present invention. It should be understood that any modification, equivalent replacement, or improvement made by those skilled in the art without departing from the spirit and principle of the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A controllable foot valve for a tubing pump of a pumping well, comprising: the valve comprises a shell (1), an upper snap spring (2), a retainer ring (3), a pressure rod (4), a guide rail (5), a locking piece (6), an upper spring (7), a central rod (8), a supporting overflowing plate (9), a middle spring seat (10), a middle spring (11), an upper valve ball (12), a sealing ring (13), an upper valve seat (14), a middle sleeve (15), a lower spring seat (16), a lower spring (17), a lower valve ball (18), a lower valve seat (19) and a lower snap spring (20); the method is characterized in that: the shell (1) is cylindrical, the upper end and the lower end of the shell are respectively provided with an external thread, the middle of the shell is provided with a supporting overflowing plate (9), the upper part of the supporting overflowing plate (9) is provided with an upper spring (7), a locking piece (6), a pressure rod (4), a retainer ring (3) and an upper clamp spring (2), the lower part of the locking piece (6) is provided with a central rod (8), the lower part of the central rod (8) sequentially penetrates through the upper spring (7), the supporting overflowing plate (9), a middle spring (11), an upper valve ball (12), an upper valve seat (14), a middle sleeve (15), a lower spring seat (16) and a lower spring (17), the lower end of the central rod (8) is movably inserted with the lower valve ball (18), and the lower valve ball (18) is seated, a lower snap spring (20) is arranged below the lower valve seat (19), and a fixed middle spring seat (10) is arranged on an upper center rod (8) of the middle spring (11) below the support overflowing plate (9).

2. The controllable foot valve of a pumpingh tubing pump as set forth in claim 1, wherein: the upper end and the lower end of a center hole of the shell (1) are respectively provided with an internal thread, the outer edge of the internal thread is respectively provided with an annular groove, the internal thread at the upper end is in threaded connection with the check ring (3), the upper clamp spring (2) is arranged in the upper annular groove to lock the check ring (3), three guide rails (5) parallel to the center line are uniformly distributed on the inner wall of the center hole of the lower shell (1) of the check ring (3) in the circumferential direction, the internal thread at the lower end is in threaded connection with the lower valve seat (19), and the lower clamp spring (20) is arranged in the lower annular groove to.

3. The controllable foot valve of a pumpingh tubing pump as set forth in claim 1, wherein: the lower part of the pressure lever (4) is provided with three zigzag arc upper teeth (4-1), the center is provided with a cylindrical blind hole, six upper Slideways (SD) parallel to the central line are uniformly distributed in the circumferential direction of the outer circle, and the size of each upper Slideway (SD) is larger than that of the guide rail (5).

4. The controllable foot valve of a pumpingh tubing pump as set forth in claim 1, wherein: the upper part of the locking piece (6) is provided with three zigzag arc lower teeth (6-1), the center is provided with a cylinder, the diameter of the cylinder is smaller than the size of a central blind hole at the lower part of the pressure lever (4), six lower slideways (XD) parallel to the central line are uniformly distributed on the outer circumference, and the size of each lower slideway (XD) is larger than that of the guide rail (5).

5. A controllable foot valve for a tubing pump of a pumping well according to claim 3 or 4, characterized in that: the upper teeth (4-1) of the pressure lever (4) are matched with the lower teeth (6-1) of the locking piece (6), the upper Slideway (SD) corresponds to the lower slideway (XD), the cylinder of the locking piece (6) is inserted into the blind hole of the pressure lever (4), the upper Slideway (SD) and the lower slideway (XD) are matched with the guide rail (5), and an automatic telescopic locking mechanism is formed by an upper spring (7) of a lower central rod (8) of the locking piece (6).

6. The controllable foot valve of a pumpingh tubing pump as set forth in claim 1, wherein: the upper end of the central rod (8) is provided with an external thread, and the lower end of the central rod is provided with an annular boss.

7. The controllable foot valve of a pumpingh tubing pump as set forth in claim 1, wherein: the supporting overflowing plate (9) is cylindrical and is fixedly arranged in the middle of the shell (1), a through hole larger than the central rod (8) is formed in the center of the supporting overflowing plate, and 3-6 upper overflowing holes (SG) are uniformly distributed outside the through hole.

8. The controllable foot valve of a pumpingh tubing pump as set forth in claim 1, wherein: go up valve ball (12) and be the hemisphere, the center is equipped with the through-hole that is greater than well core rod (8), is equipped with sealing washer (13) in the through-hole.

9. The controllable foot valve of a pumpingh tubing pump as set forth in claim 1, wherein: the upper valve seat (14) is cylindrical, a horn-shaped through hole is formed in the center of the upper valve seat, the diameter of the through hole is larger than that of the middle sleeve (15), the annular overflowing area is equal to that of the lower overflowing channel (XG), and the upper valve seat (14) is fixedly arranged between the supporting overflowing plate (9) and the lower valve seat (19) of the shell (1).

10. The controllable foot valve of a pumpingh tubing pump as set forth in claim 1, wherein: lower valve ball (18) are the hemisphere, and lower valve ball (18) upper portion is equipped with the drum, and the drum aperture is greater than well core rod (8) diameter, and the hole upper end is equipped with annular boss and well core rod (8) cooperation, hangs well core rod (8) lower extreme, prevents to deviate from, has the certain distance between the lower extreme of well core rod (8) and lower valve ball (18).