阅读说明：本技术 旋转泄压可控式试压阀 (Rotary pressure relief controllable pressure testing valve ) 是由 姚秀田 孙治国 刘庆敏 刘卫东 刘兴文 董云彬 郝延锐 徐云现 孙渊平 张辉 吴 于 2021-11-03 设计创作，主要内容包括：本发明公开了旋转泄压可控式试压阀,涉及螺杆抽油泵井管柱试压技术领域,试压可靠,可满足现场不同管柱试压的压力要求,同时泄压可控,有效防止误操作,避免提前泄压。其技术方案要点是：包括阀罩,所述阀罩的上部套装有接箍,所述接箍与阀罩为右旋螺纹连接,所述阀罩的下部套装有外筒,所述阀罩与外筒为左旋螺纹连接,所述外筒内设有位于阀罩下方的限位板,所述限位板与外筒为左旋螺纹连接,所述外筒上套装有压帽,所述压帽与外筒为右旋螺纹连接,所述阀罩内侧设有可相对滑动的密封滑套,所述阀罩与密封滑套通过剪钉定位,所述密封滑套内侧设有阀球,所述阀罩侧壁沿周向均匀设有个控制锁块孔,所述控制锁块孔内设有控制锁块。(The invention discloses a rotary pressure relief controllable pressure testing valve, which relates to the technical field of pressure testing of tubular columns of screw oil well pumps, is reliable in pressure testing, can meet the pressure requirements of different tubular columns for pressure testing on site, is controllable in pressure relief, effectively prevents misoperation, and avoids pressure relief in advance. The key points of the technical scheme are as follows: including the valve bonnet, the upper portion cover of valve bonnet is equipped with the coupling, the coupling is right-handed threaded connection with the valve bonnet, the lower part cover of valve bonnet is equipped with the urceolus, the valve bonnet is left-handed threaded connection with the urceolus, be equipped with the limiting plate that is located the valve bonnet below in the urceolus, the limiting plate is left-handed threaded connection with the urceolus, the cover is equipped with on the urceolus and presses the cap, press the cap to be right-handed threaded connection with the urceolus, the valve bonnet inboard is equipped with the sealed sliding sleeve of relative slip, the valve bonnet passes through the shear pin location with sealed sliding sleeve, sealed sliding sleeve inboard is equipped with the valve ball, the valve bonnet lateral wall evenly is equipped with a control locking piece hole along circumference, the downthehole control locking piece that is equipped with of control locking piece.)

1. Controllable formula pressure test valve of rotatory pressure release, including valve bonnet (3), its characterized in that, the upper portion cover of valve bonnet (3) is equipped with coupling (1), coupling (1) is right-handed threaded connection with valve bonnet (3), the lower part cover of valve bonnet (3) is equipped with urceolus (10), valve bonnet (3) is left-handed threaded connection with urceolus (10), be equipped with limiting plate (13) that are located valve bonnet (3) below in urceolus (10), limiting plate (13) are left-handed threaded connection with urceolus (10), the cover is equipped with on urceolus (10) presses cap (9), press cap (9) and urceolus (10) to be right-handed threaded connection, valve bonnet (3) inboard is equipped with sealed sliding sleeve (5) that can relatively slide, valve bonnet (3) and sealed sliding sleeve (5) are fixed a position through cutting nail (12), sealed sliding sleeve (5) inboard is equipped with valve ball (4), valve bonnet (3) lateral wall evenly is equipped with four control locking piece holes along circumference, the downthehole control locking piece (11) that is equipped with of control locking piece, be equipped with annular control locking piece recess on urceolus (10) inner wall, annular control locking piece recess, control locking piece hole, control locking piece (11) form controllable structure, effectively prevent the maloperation, avoid pressure release in advance.

2. The rotary pressure relief controllable pressure testing valve according to claim 1, characterized in that the inner wall of the valve housing (3) is provided with a sealing section and a pressure relief cavity (8) which are arranged up and down, the sealing sliding sleeve (5) is embedded with a sealing ring (6) corresponding to the sealing section of the valve housing (3), the sealing ring (6) is located at the sealing section of the valve housing (3), so that the valve housing (3) and the sealing sliding sleeve (5) are in a sealing state, a pressure test can be performed on a tubular column, and the sealing sliding sleeve (5) is provided with a pressure relief hole (7) which is located below the sealing ring (6) and is communicated with the pressure relief cavity (8).

3. The rotary pressure relief controllable pressure testing valve according to claim 2, wherein the outer diameter of the lower end of the sealing sliding sleeve (5) presses the control locking block (11) to be expanded into the annular control locking block groove on the outer cylinder (10), and the valve cover (3) and the outer cylinder (10) are locked.

4. The rotary pressure relief controllable pressure testing valve according to claim 3, wherein the control locking block (11) has a chamfer on the outer circumference of the end corresponding to the groove of the annular control locking block.

5. The rotary pressure relief controllable pressure testing valve according to claim 4, characterized in that a ball blocking plate (2) above the valve ball (4) is welded inside the valve cover (3).

6. The rotary pressure relief controllable pressure testing valve according to claim 5, characterized in that the inner wall of the upper end of the sealing sliding sleeve (5) is a slope structure matched with the valve ball (4).

7. A rotary pressure relief controllable pressure test valve according to claim 5, characterized in that the number of said sealing rings (6) is two.

Technical Field

The invention relates to the technical field of pressure test of a tubular column of a screw rod oil well pump, in particular to a rotary pressure relief controllable pressure test valve.

Background

The screw oil pump oil extraction technology has the advantages of high system efficiency, low energy consumption, stable crude oil lifting, oil and water stabilization, sand discharge and the like, the prior art is influenced by the structure of the screw oil pump, the lower end of the screw oil pump has no fixed valve, and the pressure test of an oil well pipe column can not be carried out, therefore, a pressure testing valve is required to be additionally arranged when the oil well pipe column is used for testing the pressure, the pressure testing mode of the screw oil pump which is commonly used on site at present is that a check valve is additionally arranged at the lower part of the screw oil pump, can realize pressure test of the pipe column and eliminate the problem of pipe leakage, but when the rotor of the screw oil well pump is put into the stator in practical application, because the liquid at the lower part of the check valve and the rotor can not be discharged in time, the problem that the rotor can not enter the stator smoothly occurs, and when the pump is detected, the oil drainage effect on crude oil in the oil pipe cannot be finished due to the single flow effect of the check valve, so that the top-blowing operation causes certain environmental pollution to a well plant and the surrounding environment. Therefore, the oil sleeve communication channel can be opened after the pressure test of the pressure test valve under the screw rod oil well pump is completed, so that the rotor can smoothly enter the pump barrel.

Chinese patent CN201320039896.5 discloses a shear type screw oil pump pressure testing device. The working principle is that after the pressure test of the pipe column is finished, the pipe column is continuously pressed to knock off the valve seat, so that the channel is opened. When the shear pin is cut, the pressure testing device is controlled by pressure, the pressure difference of the oil jacket generated on site is not a fixed value because the liquid level depth of the sleeve is not a fixed value, but the pressure value of the shear pin cut by the device is a fixed value, so the possibility of cutting the shear pin in advance exists, and the sealing performance of the tubular column cannot be guaranteed, namely the pressure testing of the tubular column fails. Therefore, a rotary pressure relief controllable pressure test valve is proposed.

Disclosure of Invention

The invention aims to provide a rotary pressure relief controllable pressure testing valve which has the advantage of solving the problem that the sealing performance of a pipe column cannot be guaranteed, namely the pressure testing of the pipe column fails due to the possibility of cutting a shear pin in advance in the prior art.

The technical purpose of the invention is realized by the following technical scheme: a rotary pressure relief controllable pressure testing valve comprises a valve cover, wherein a coupling is sleeved on the upper portion of the valve cover, the coupling and the valve cover are in right-hand threaded connection, an outer barrel is sleeved on the lower portion of the valve cover, the valve cover and the outer barrel are in left-hand threaded connection, a limiting plate located below the valve cover is arranged in the outer barrel, the limiting plate and the outer barrel are in left-hand threaded connection, a pressing cap is sleeved on the outer barrel, the pressing cap and the outer barrel are in right-hand threaded connection, a sealing sliding sleeve capable of sliding relatively is arranged on the inner side of the valve cover, the valve cover and the sealing sliding sleeve are positioned through shear pins, a valve ball is arranged on the inner side of the sealing sliding sleeve, four control lock block holes are uniformly formed in the side wall of the valve cover along the circumferential direction, control lock blocks are arranged in the control lock block holes, an annular control lock block groove is formed in the inner wall of the outer barrel, the annular control lock block groove, the control lock block holes and the control lock blocks form a controllable structure, effectively preventing misoperation and avoiding pressure relief in advance.

Preferentially, be equipped with the seal segment and the pressure release chamber that set up from top to bottom on the inner wall of valve bonnet, it is equipped with the sealing washer that corresponds with the valve bonnet seal segment to inlay on the sealed sliding sleeve, the sealing washer is in the seal segment of valve bonnet, makes valve bonnet and sealed sliding sleeve be encapsulated situation, can carry out the pressure testing to the tubular column, be equipped with the pressure release hole that is located the sealing washer below and communicates with the pressure release chamber on the sealed sliding sleeve.

Preferably, the outer diameter of the lower end of the sealing sliding sleeve is abutted against the control locking block and is expanded to the annular control locking block groove on the outer barrel, and the valve cover and the outer barrel are locked.

Preferably, the control locking block and the excircle of one end of the annular control locking block corresponding to the groove are provided with chamfers.

Preferentially, the valve cover is internally welded with a ball blocking plate positioned above the valve ball.

Preferably, the inner wall of the upper end of the sealing sliding sleeve is of an inclined surface structure matched with the valve ball.

Preferably, the number of the sealing rings is two.

In conclusion, the invention has the following beneficial effects:

1: the invention has reliable pressure test, can meet the pressure test requirements of different tubular columns on site, avoids the possibility of shearing the shear pin in advance, effectively ensures the sealing property of the tubular column, namely ensures the stability of the pressure test of the tubular column and ensures the success of the pressure test.

2: the pressure relief device has controllable pressure relief, can ensure that the pressure test of the tubular column is carried out in a controllable range, effectively prevents the pressure relief in advance caused by misoperation of field operators, and has more stable pressure test process.

3: the oil jacket communication channel can be opened after the pressure test is finished, so that the rotor can smoothly enter the pump barrel, and the operation is simpler and more convenient, and the operation efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of a conventional state of a rotary pressure relief controllable pressure test valve according to the present invention;

fig. 2 is a schematic structural diagram of a pressure test state of the rotary pressure relief controllable pressure test valve provided by the invention;

fig. 3 is a schematic structural diagram of a forward rotation pressure relief state of the rotary pressure relief controllable pressure test valve according to the present invention.

Reference numerals:

1. a coupling; 2. a ball blocking plate; 3. a valve housing; 4. a valve ball; 5. sealing the sliding sleeve; 6. a seal ring; 7. a pressure relief vent; 8. a pressure relief cavity; 9. pressing the cap; 10. an outer cylinder; 11. controlling the locking block; 12. shearing the nails; 13. and a limiting plate.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

A rotary pressure relief controllable pressure testing valve comprises a valve cover 3, as shown in figures 1 to 3, a coupling 1 is sleeved on the upper portion of the valve cover 3, the coupling 1 and the valve cover 3 are in right-handed threaded connection, an outer barrel 10 is sleeved on the lower portion of the valve cover 3, the valve cover 3 and the outer barrel 10 are in left-handed threaded connection, a pressure relief function is realized by a forward rotation pipe column, a limiting plate 13 is arranged in the outer barrel 10 and located below the valve cover 3, the limiting plate 13 and the outer barrel 10 are in left-handed threaded connection, a pressure cap 9 is sleeved on the outer barrel 10, the pressure cap 9 and the outer barrel 10 are in right-handed threaded connection, a sealing sliding sleeve 5 capable of sliding relatively is arranged on the inner side of the valve cover 3, the valve cover 3 and the sealing sliding sleeve 5 are located through shear pins 12, a valve ball 4 is arranged on the inner side of the sealing sliding sleeve 5, a ball blocking plate 2 located above the valve ball 4 is welded in the valve cover 3, the ball blocking and limiting function is achieved by the ball blocking function of the ball blocking plate 2, the valve ball 4 is prevented from sliding upwards, the inner wall of the upper end of the sealing sliding sleeve 5 is of an inclined plane structure matched with the valve ball 4, make valve ball 4 inseparabler with 5 inner wall contacts of sealed sliding sleeve, and then the leakproofness when improving the pressure testing, 3 lateral walls of valve bonnet evenly are equipped with four control locking piece holes along circumference, the downthehole control locking piece 11 that is equipped with of control locking piece, be equipped with annular control locking piece recess on the urceolus 10 inner wall, the lower extreme external diameter of sealed sliding sleeve 5 supports presses in the annular control locking piece recess that control locking piece 11 opened to urceolus 10 outward, and with valve bonnet 3, urceolus 10 locking is motionless, annular control locking piece recess, control locking piece hole, control locking piece 11 forms controllable structure, effectively prevent the maloperation, avoid pressure release in advance.

As shown in fig. 1, a sealing section and a pressure relief cavity 8 which are vertically arranged are arranged on the inner wall of the valve housing 3, a sealing ring 6 corresponding to the sealing section of the valve housing 3 is embedded on the sealing sliding sleeve 5, the number of the sealing rings 6 is two, the sealing rings 6 are positioned in the sealing section of the valve housing 3, the valve housing 3 and the sealing sliding sleeve 5 are in a sealing state, pressure testing can be performed on the tubular column, and a pressure relief hole 7 which is positioned below the sealing ring 6 and is communicated with the pressure relief cavity 8 is arranged on the sealing sliding sleeve 5.

As shown in figure 1, the control locking piece 11 and the excircle of one end corresponding to the annular control locking piece groove have chamfers, when the pipe column rotates forwards, the pipe column drives the coupling 1 and the valve cover 3 to move upwards, and because the valve cover 3 and the outer barrel 10 are in left-handed threaded connection, and the excircle of the control locking piece 11 has chamfers, when the inner part is unsupported, the control locking piece 11 can be retracted in the rotating process.

In the invention, the invention is arranged at the lower part of a screw oil pump, pressure test can be carried out on a pipe column, when the pressure test operation of the pipe column is carried out, firstly, a valve cover 3 is connected with the lowest end of the pipe column of the screw oil pump and is put into an oil well, a valve ball 4 is seated on a sealing sliding sleeve 5, after the valve cover 3 and the sealing sliding sleeve 5 are positioned by a shear pin 12 under the normal state (figure 1), the side wall of the valve cover 3 is uniformly provided with four control locking block holes along the circumferential direction, a control locking block 11 is arranged in the control locking block hole, the inner wall of an outer cylinder 10 is provided with an annular control locking block groove, the outer diameter of the lower end of the sealing sliding sleeve 5 ensures that the control locking block 11 is outwards opened to lock the valve cover 3, the outer cylinder 10 of the valve cover 3 cannot rotate, the annular control locking block groove, the control locking block hole and the control locking block 11 form a controllable structure, thereby effectively preventing misoperation and avoiding pressure release in advance, and simultaneously, the sealing ring 6 is positioned at the sealing section of the valve cover 3, the valve bonnet 3 and the sealing sliding sleeve 5 are in a sealing state, and the pipe column can be subjected to pressure testing to pressurize the pipe column into the oil pipe so as to detect whether a leak source exists in the oil pipe or not, and the shear pin 12 is sheared along with the increase of the pressure, so that the pressure testing operation of the pipe column of the screw oil well pump is completed;

on the spot, because the liquid level depth of the casing is not a fixed value, the pressure difference of the oil casing is also not a fixed value, so that the possibility of cutting the shear pin 12 in advance exists, the target pressure of the pressure test cannot be reached in the pipe column, when the shear pin 12 is cut, the limiting plate 13 positioned below the valve cover 3 is arranged in the outer cylinder 10, the sealing sliding sleeve 5 is limited through the limiting plate 13, the sealing sliding sleeve 5 with the valve ball 4 descends to the lower end of the sealing sliding sleeve 5 to contact the limiting plate 13, at the moment, the valve cover 3 and the sealing sliding sleeve 5 are still in a sealing state, the sealing performance of the pipe column is effectively ensured, the pipe column is in the sealing state, the pressure can be continuously pressed into the pipe column, the pressure reaches the target pressure, the pressure test is further completed, the pressure test of the pipe column can be ensured to be carried out in a controllable range, and the pressure test is stable and reliable;

at the moment, the downward movement of the sealing sliding sleeve 5 causes the inside of the control locking block 11 to be free from support, the control locking block 11 can contract and slide inwards, when the pipe column rotates forwards (figure 3), the pipe column drives the coupling 1 and the valve cover 3 to move upwards, because the valve cover 3 is connected with the outer cylinder 10 by left-handed threads, the valve cover 3 of the forward rotation column moves upwards relative to the outer cylinder 10, the outer circle of the control locking block 11 has a chamfer, when the inner part is not supported, the control locking block 11 can be retracted when rotating, the sealing sliding sleeve 5 and the valve ball 4 are fixed in place under the action of pressure, the valve cover 3 moves upwards until the sealing ring 6 is separated from the sealing section of the valve cover 3 and enters the pressure release cavity 8, at the moment, liquid in the pipe column can enter the pressure release cavity 8 through the oil pipe, then enters the pressure release hole 7 through the pressure release cavity 8 and then enters the inner cavity of the tool to form oil sleeve communication, the pressure release function is realized, when the rotor of the screw oil well pump enters the stator, the liquid below the rotor can be discharged in time, and the rotor can smoothly enter the stator.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.