阅读说明：本技术 泵下油管液控防喷装置 (Hydraulic control blowout preventer for pump oil pipe ) 是由 康庆刚 于 2019-09-27 设计创作，主要内容包括：一种泵下油管液控防喷装置,其装置包括上接头、外筒、下接头、管柱上提阀门、工作阀门和管柱下井阀门,在该上接头内孔下部和外筒内部装有能够在上提管柱时将管柱内的上下通道封闭的管柱上提阀门,该上接头的外周通过螺纹与外筒的上端连接,该外筒的下端与下接头之间螺纹连接有能够在工作时封闭上下通道的工作阀门,在所述的下接头内部装有能够在管柱下井时将管柱内通道封闭的管柱下井阀门。本发明的优点是：在起下管柱过程中,通道都是封闭的,井液不会从管柱内部喷涌到地面,从面避免了因此而造成的污染；而在正常工作状态下,通道是打开的可以保证正常生产。(The utility model provides a tubing hydraulic control blowout preventer under pump, its device includes top connection, urceolus, lower clutch, the tubular column lifts the valve, work valve and tubular column valve of going into the well, is equipped with in this top connection hole lower part and urceolus can lift the valve with the interior upper and lower passageway confined tubular column of tubular column when lifting the tubular column, and the periphery of this top connection passes through the screw thread to be connected with the upper end of urceolus, threaded connection has the work valve that can seal upper and lower passageway at the during operation between the lower extreme of this urceolus and the lower clutch inside be equipped with can be in the tubular column valve of going into the well of passageway confined in the tubular column when going into the. The invention has the advantages that: in the process of tripping the pipe column, the channels are closed, so that well fluid cannot gush to the ground from the interior of the pipe column, and pollution caused by the well fluid is avoided; and under the normal working condition, the channel is opened to ensure the normal production.)

1. The utility model provides a hydraulic control blowout preventer for pump oil pipe, which is characterized in that, including top connection (1), urceolus (3), lower clutch (16), the tubular column lifts the valve, work valve and tubular column valve of going into the well, be equipped with in this top connection (1) hole lower part and urceolus (3) inside can lift the tubular column of upper and lower passageway confined in the tubular column when lifting the tubular column and lift the valve, the periphery of this top connection (1) passes through the screw thread and is connected with the upper end of urceolus (3), threaded connection has the work valve that can seal upper and lower passageway at the during operation between the lower extreme of this urceolus (3) and lower clutch (16) inside be equipped with and can be in the tubular column valve of going into the well of tubular column inner channel confined when going into the well.

2. The pump-down tubing hydraulically controlled blowout preventer of claim 1, wherein the tubing lift valve comprises: the anti-blowout ball-cock assembly comprises an anti-blowout female sleeve (2), an anti-blowout ball rod (4), a spring (5), a seat seal constant pressure shear pin (6), a thrust plunger (7), an upper O-shaped sealing ring (8), a lower O-shaped sealing ring (9) and a cylinder body (10), wherein the periphery of the anti-blowout female sleeve (2) is connected with the lower part of an inner hole of an upper connector (1) through threads; the cylinder body (10) is arranged below the blowout prevention female sleeve (2), a thrust plunger (7) and a blowout prevention ball rod (4) are arranged in an axial hole of the cylinder body (10) from bottom to top, the top end of the blowout prevention ball rod (4) extends out of the top end of the cylinder body (10) and is provided with a ball body (41), and a spring (5) is arranged outside the blowout prevention ball rod (4) between the ball body (41) and the top end of the cylinder body (10); the side wall of the upper part of the cylinder body (10) is provided with a radial screw hole and is provided with a seat seal constant pressure shear pin (6), the inner end of the seat seal constant pressure shear pin (6) extends into the hole on the blowout prevention ball arm (4), and the blowout prevention ball arm (4) is positioned on the cylinder body (10) through the seat seal constant pressure shear pin (6); a pressure relief hole (101) communicated with the outside of the outer cylinder (3) is formed in the side wall of the lower part of the cylinder body (10), and the outer end of the pressure relief hole (101) is welded with the inner wall of the outer cylinder (3); a pressurizing hole (102) is arranged on the side wall of the cylinder body (10) below the pressure relief hole (101), and the pressurizing hole (102) is positioned at the bottom end of the thrust plunger (7); an upper O-shaped sealing ring (8) and a lower O-shaped sealing ring (9) are respectively arranged on the thrust plunger (7) corresponding to the upper part and the lower part of the pressure relief hole (101).

3. The hydraulic control blowout preventer for the pump lower oil pipe according to claim 2, wherein the working valve comprises a valve ball (11), a valve seat (12) and a valve bonnet (13), the outer periphery of the upper end of the valve bonnet (13) is connected with the inner periphery of the lower end of the outer cylinder (3) through threads, a convex column (131) is arranged at the top end of the valve bonnet (13), the bottom end of the cylinder (10) is installed on the convex column (131) through threads, and an overflowing hole (132) penetrating through the upper end and the lower end of the valve bonnet (13) is arranged beside the convex column (131); a valve seat (12) is arranged in the middle of the valve cover (13), and a valve ball (11) is arranged at the top end of the valve seat (12); the lower end of the valve cover (13) is connected with the lower joint (16) through threads, and the top end of the lower joint (16) is abutted against the bottom end of the valve seat (12).

4. The hydraulic control blowout preventer for the pump tubing string according to claim 3, wherein the tubing string downhole valve comprises an O-shaped sealing ring (14), a deblocking constant pressure shear pin (15) and a sealing plug (17), the sealing plug (17) is connected with the inner part of the lower joint (16) in a threaded manner, and a side hole is formed in the side surface of the sealing plug (17); the side wall of the lower joint (16) is provided with a radial screw hole, a deblocking constant pressure shear pin (15) is arranged in the screw hole, and the inner end of the deblocking constant pressure shear pin is inserted into a side hole of the sealing plug (17); an O-shaped sealing ring (14) is arranged on the periphery of the sealing plug (17); an ejector pin (171) is provided at the axial center of the top end of the sealing plug (17), the top end of the ejector pin extends upwards through the valve seat (12) and is abutted against the bottom surface of the valve ball (11), and the valve ball (11) is positioned at a position away from the valve seat (12).

5. The hydraulic control blowout preventer for pump bottom pipe according to claim 4, wherein the shear pressure of the set constant pressure shear pin (6) is greater than the shear pressure of the unset constant pressure shear pin (15).

6. The pump downcomer hydraulic control blowout preventer according to claim 2, wherein the outer barrel (3) and the cylinder (10) are welded together after assembly is completed.

Technical Field

The invention relates to a hydraulic control blowout preventer for a pump oil pipe, which is a device for preventing well fluid from being sprayed out of a pipe string in the process of pulling up and pulling down the pipe string in the production operation of an oil field, and belongs to the technical field of oil field application.

Background

At present, before normal production operation, an oil pumping well needs to put a pipe string formed by serially connecting oil pipes to the bottom of the well, an oil well pump and other downhole tools are installed below the pipe string, and an inner hole of the pipe string is a channel for up-and-down reciprocating motion of a rod string and is also a channel for discharging well liquid, so that the oil pumping well needs to be smooth in the working process. When the well is repaired, the rod column needs to be lifted out of the pipe column, then the pipe column is lifted out of the well, and the oil well pump can be lifted out of the ground for repair, so that the pipe column needs to be lifted out of the ground when the well is repaired and before normal production.

The underground formation pressure has high or low, and for some low-pressure wells, the liquid level in the well is far lower than the well head, and crude oil in the pipe column needs to be discharged underground in the process of lifting the pipe column, so that the pollution caused by bringing the pipe column to the ground is prevented. For some high-pressure wells, the pressure in the well continuously lifts well liquid to be sprayed out of the well mouth, so that the well liquid in the well can be continuously sprayed out of the ground from the inside of the pipe column in the pipe column running process, not only can the ground be polluted, but also potential safety hazards exist. Under the condition, the inner hole of the pipe column needs to be closed when the pipe column is put into the well, the pipe column needs to be completely opened to ensure smoothness in the working process, and then the pipe column is plugged again before being lifted in the well repairing operation. A device with these three functions can accomplish this task.

disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a hydraulic control blowout preventer for a pump lower oil pipe, which is arranged at the lower part of a pump cylinder of an oil well pump and replaces an oil well pump fixed valve assembly.

The technical scheme of the invention is as follows: the utility model provides a tubing hydraulic control blowout preventer under pump, its characterized in that includes top connection, urceolus, lower clutch, the tubular column lifts the valve, work valve and tubular column valve of going into the well, is equipped with the tubular column that can seal the upper and lower passageway in the tubular column when lifting the tubular column in this top connection hole lower part and urceolus inside and lifts the valve, the periphery of this top connection passes through the screw thread to be connected with the upper end of urceolus, threaded connection has the work valve that can seal the upper and lower passageway at the during operation between the lower extreme of this urceolus and the lower clutch inside be equipped with the tubular column valve of going into the well that can seal the passageway in the tubular column when the.

The invention has the advantages that: in the process of tripping the pipe column, the channels are closed, so that well fluid cannot gush to the ground from the interior of the pipe column, and pollution caused by the well fluid is avoided; and under the normal working condition, the channel is opened to ensure the normal production.

Drawings

FIG. 1 is a schematic view of the main structure of the present invention (also referred to as the working state in the process of lowering the well);

FIG. 2 is a reference diagram for the normal operation of FIG. 1;

Fig. 3 is a state reference diagram in which the pipe string is lifted up in fig. 1.

Detailed Description

The invention will be further described with reference to specific embodiments, and the advantages and features of the invention will become apparent as the description proceeds. These examples are illustrative only and do not limit the scope of the present invention in any way. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention, and that such changes and modifications may be made without departing from the spirit and scope of the invention.

Referring to fig. 1-3, the invention relates to a hydraulic control blowout preventer for a pump down pipe, which is characterized by comprising an upper joint 1, an outer cylinder 3, a lower joint 16, a pipe column lifting valve, a working valve and a pipe column down-hole valve, wherein the lower part of an inner hole of the upper joint 1 and the inner part of the outer cylinder 3 are provided with the pipe column lifting valve capable of sealing an upper channel and a lower channel in the pipe column when the pipe column is lifted, the periphery of the upper joint 1 is connected with the upper end of the outer cylinder 3 through threads, the working valve capable of sealing the upper channel and the lower channel when working is connected between the lower end of the outer cylinder 3 and the lower joint 16 through threads, and the lower joint 16 is internally provided with the pipe column down-hole valve capable of sealing the.

The pipe column lifting valve comprises: the anti-blowout female sleeve 2, the anti-blowout ball rod 4, the spring 5, the seat sealing constant pressure shear pin 6, the thrust plunger 7, the upper O-shaped sealing ring 8, the lower O-shaped sealing ring 9 and the cylinder body 10 are arranged on the outer periphery of the anti-blowout female sleeve 2, and the outer periphery of the anti-blowout female sleeve is connected with the lower portion of an inner hole of the upper joint 1 through threads; the cylinder body 10 is arranged below the blowout prevention female sleeve 2, a thrust plunger 7 and a blowout prevention ball rod 4 are arranged in an axial hole of the cylinder body 10 from bottom to top, the top end of the blowout prevention ball rod 4 extends out of the top end of the cylinder body 10 and is provided with a ball body 41, and a spring 5 is arranged outside the blowout prevention ball rod 4 between the ball body 41 and the top end of the cylinder body 10; a radial screw hole is formed in the side wall of the upper part of the cylinder body 10, a seat seal constant pressure shear pin 6 is installed in the radial screw hole, the inner end of the seat seal constant pressure shear pin 6 extends into a hole in the blowout-preventing ball rod 4, and the blowout-preventing ball rod 4 is positioned on the cylinder body 10 through the seat seal constant pressure shear pin 6; a pressure relief hole 101 communicated with the outside of the outer cylinder 3 is formed in the side wall of the lower part of the cylinder body 10, and the outer end of the pressure relief hole 101 is welded with the inner wall of the outer cylinder 3; a pressurizing hole 102 is arranged on the side wall of the cylinder body 10 below the pressure relief hole 101, and the pressurizing hole 102 is positioned at the bottom end of the thrust plunger 7; an upper O-shaped sealing ring 8 and a lower O-shaped sealing ring 9 are respectively arranged on the thrust plunger 7 corresponding to the upper part and the lower part of the pressure relief hole 101. The bottom end of the cylinder 10 is connected with the convex column 131 at the top end of the valve cover 13 through a screw thread.

The working valve comprises a valve ball 11, a valve seat 12 and a valve cover 13, the outer periphery of the upper end of the valve cover 13 is connected with the inner periphery of the lower end of the outer cylinder 3 through threads, a convex column 131 is arranged at the top end of the valve cover 13, the bottom end of the cylinder 10 is installed on the convex column 131 through threads, and an overflowing hole 132 which penetrates through the upper end and the lower end of the valve cover 13 is arranged beside the convex column 131; a valve seat 12 (positioned below the reducing step in the middle of the valve cover 13) is arranged in the middle of the valve cover 13, and a valve ball 11 is arranged at the top end of the valve seat 12; the lower end of the valve cover 13 is connected with the lower joint 16 through threads, and the top end of the lower joint 16 is abutted against the bottom end of the valve seat 12.

The pipe column downhole valve comprises an O-shaped sealing ring (14), a deblocking constant pressure shear pin (15) and a sealing plug (17), the sealing plug (17) is connected with the inner part of the lower connector (16) in a threaded manner, and a side hole is formed in the side surface of the sealing plug (17); the side wall of the lower joint 16 is provided with a radial screw hole, a deblocking constant pressure shear pin 15 is arranged in the screw hole, and the inner end of the deblocking constant pressure shear pin is inserted into the side hole of the sealing plug 17; an O-shaped sealing ring (14) is arranged on the periphery of the sealing plug (17); an ejector 171 is provided at the axial center of the top end of the sealing plug 17, and the top end of the ejector extends upward through the valve seat 12 and abuts against the bottom surface of the valve ball 11, so as to position the valve ball 11 away from the valve seat 12.

The shearing pressure of the set constant pressure shear pin 6 is greater than that of the set constant pressure shear pin 15.

The outer cylinder 3 and the cylinder body 10 are welded together after the assembly is finished.

The working principle of the invention is as follows:

As shown in figure 1, in the process of descending, a channel of the device is blocked by the sealing plug 17, well fluid cannot enter the channel to ascend, the blowout prevention effect is achieved, the valve ball 11 is separated from the valve seat 12, the top space can ensure that the pressure in the pipe column can reach the sealing plug 17, and the blowout prevention ball rod 4 keeps potential energy under the action of the spring 5.

As shown in FIG. 2, when normal operation is required, the pressure is applied from the inside of the pipe string, the pressure is directly transmitted to the sealing plug 17 and pushes the sealing plug 17 to go down to shear the unsealing pressure-fixing shear pin 15, the sealing plug 17 goes down continuously after the unsealing pressure-fixing shear pin 15 is sheared and slides out from the lower connector 16 to remove the tail pipe of the pipe string, the channel is opened, the valve ball 11 returns to the working position at the moment, normal operation can be performed, and the blowout-preventing ball rod 4 keeps potential energy under the action of the spring 5 at the moment.

As shown in FIG. 3, when the pipe string needs to be lifted up, the pipe string is lifted out of the pipe string, then the pipe string is pressed into the pipe string, because the valve ball 11 and the valve seat 12 are in a closed state, pressure enters from the air inlet hole 102 and is applied to the bottom end of the thrust plunger 7 to push the thrust plunger 7 to move upwards, the thrust plunger 7 pushes the blowout-preventing rod 4 to shear the seat seal constant-pressure shear pin 6, the blowout-preventing rod 4 bounces upwards under the action of the spring 5 after the seat seal constant-pressure shear pin 6 is sheared, the ball 41 at the top end of the blowout-preventing rod 4 enters the inner hole of the blowout-preventing nut sleeve 2 to block a channel to realize seat seal, and liquid in the pipe string is sealed.

Because the shearing pressure of the set fixed pressure shear pin 6 is greater than that of the unsealing fixed pressure shear pin 15, when the well fluid normally works, the well fluid enters from the lower part, the unsealing fixed pressure shear pin 15 is broken to release the sealing plug 17 to the lower part, the set fixed pressure shear pin 6 is not moved, and the blowout-preventing ball rod 4 is not moved. When the anti-blowout ball rod 4 needs to be lifted up, the thrust plunger 7 is pushed through pressure, the anti-blowout ball rod 4 is pushed to move upwards by the thrust plunger 7, and the seat seal constant pressure shear nail 6 is broken, so that the anti-blowout ball rod 4 is pushed to move upwards.