CN113445954A - Circulating oil pipe liquid accuse environmental protection blowout preventer under pump - Google Patents

Abstract

The lower circulating oil pipe hydraulic control environment-friendly blowout preventer under the pump is characterized by comprising an upper joint and a pressure pipe which are arranged at the upper part of an oil well pump, a circulating working valve which is arranged at the lower part of the oil well pump and is used for repeatedly opening and closing an upper channel and a lower channel, and a circulating pulling system which is used for pulling a ball body of the circulating working valve, wherein the top end of the circulating working valve is connected with the bottom end of the oil well pump; the bottom end of the circulating working valve is connected with the top end of the circulating pulling system through a coupling connecting pipe; two ends of a pressure guiding pipe are connected between one side of the top end of the circulating pulling system and one side of the lower end of the upper joint. 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.

Description

Circulating oil pipe liquid accuse environmental protection blowout preventer under pump

Technical Field

The invention relates to a circulating oil pipe hydraulic control environment-friendly blowout preventer under a pump, which is a device for preventing well liquid from being sprayed out of a pipe column in the process of pulling up and pulling down the pipe column in the oil field production operation, 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.

The prior art can not well complete the whole operation process, a plurality of devices can only complete a single underground closing action, and the inner hole of the tubular column can not be closed when the tubular column is lifted, so that well liquid is often sprayed out of the ground, and serious pollution and potential safety hazards are caused.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a pump lower circulation type oil pipe hydraulic control environment-friendly blowout preventer 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 lower circulating oil pipe hydraulic control environment-friendly blowout preventer under the pump is characterized by comprising an upper joint and a pressure pipe which are arranged at the upper part of an oil well pump, a circulating working valve which is arranged at the lower part of the oil well pump and is used for repeatedly opening and closing an upper channel and a lower channel, and a circulating pulling system which is used for pulling a ball body of the circulating working valve, wherein the top end of the circulating working valve is connected with the bottom end of the oil well pump; the bottom end of the circulating working valve is connected with the top end of the circulating pulling system through a coupling connecting pipe; two ends of a pressure guiding pipe are connected between one side of the top end of the circulating pulling system and one side of the lower end of the upper joint.

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 an expanded view of the shape of the rotational track groove of the present invention.

Detailed Description

Referring to fig. 1, the invention relates to a pump lower circulation type oil pipe hydraulic control environment-friendly blowout preventer, which is characterized by comprising an upper joint 1 and a pressure pipe 2 which are arranged at the upper part of an oil well pump 3, a circulation working valve which is arranged at the lower part of the oil well pump 3 and is used for repeatedly opening and closing an upper channel and a lower channel, and a circulation pulling system which is used for pulling a ball body 7 of the circulation working valve, wherein the top end of the circulation working valve is connected with the bottom end of the oil well pump 3; the bottom end of the circulating working valve is connected with the top end of the circulating pulling system through a coupling connecting pipe 17; both ends of the pressure guiding pipe 2 are connected between one side of the top end of the circulation pulling system and one side of the lower end of the upper joint 1.

The circulating working valve comprises a ball seat 4, a ball valve body 5, a sealing ring 6, an upper spring retainer ring 8, a ball pressing spring 9, a lower spring retainer ring 10, a pull rod 11, an upper coupling 12 sieve tube 13, a lower coupling 14, a connecting sleeve 15, a nut 16 and a ball body 7, wherein the upper end of the ball valve body 5 is connected with the bottom end of the oil well pump 3, an inner flange is arranged at the upper part in the ball valve body 5 to serve as the valve seat 4, the sealing ring 6, the ball body 7, the upper spring retainer ring 8, the ball pressing spring 9 and the lower spring retainer ring 10 are sequentially arranged below the valve seat 4 downwards, the top end of the pull rod 11 is connected with the ball body 7, and the bottom end of the pull rod 11 is connected with the connecting sleeve 15; the bottom end of the ball valve body 5 is connected with the top end of a sieve tube 13 through an upper coupling 12, and a lower spring retainer ring 10 for positioning the bottom end of the ball pressing spring 9 is arranged in the ball valve body 5; the bottom end of the sieve tube 13 is connected with the top end of the lower coupling 14; a snap ring is arranged in the lower hoop 14 and is used for propping against the connecting sleeve 15; the bottom end of the lower ferrule 14 is connected to the top end of the coupling nipple 17.

The circulating pulling system comprises a baffle ring 18, a central shaft 19, a lower connector 20, an upper O-shaped sealing ring 21, a lower O-shaped sealing ring 22, a track pin 24, a compression spring 25, a spring adjusting baffle ring 26, an outer sleeve 27 and a tail pipe 28, wherein the top end of the lower connector 20 is connected with the bottom end of the coupling adapter 17, and the central shaft 19 is arranged in the lower connector 20; an L-shaped through hole 201 which is communicated with the inside and the outside is arranged in the middle of the lower connector 20, the outer end of the L-shaped through hole 201 is connected with the lower end of the pressure guide pipe 2, and an upper O-shaped sealing ring 21 and a lower O-shaped sealing ring 22 are respectively arranged between the inner circumferential surface of the lower connector 20 and the outer circumferential surface of the central shaft 19 corresponding to the upper position and the lower position of the L-shaped through hole 201 to form a sealed annular cavity; a rotary track groove 23 capable of repeatedly rotating 90 degrees back and forth is arranged on the outer peripheral surface of the lower part of the central shaft 19; a track pin 24 which is matched with the rotary track groove 23 in a sliding way is arranged on the inner side of the lower connector 20; the bottom end of the central shaft 19 is provided with a reducing extension section 191 which extends out of the lower connector 20 downwards, the periphery of the reducing extension section 191 is sleeved with a compression spring 25, and the periphery of the compression spring 25 is sleeved with an outer sleeve 27; the upper end and the lower end of the outer sleeve 27 are respectively connected with the bottom end of the lower connector 20 and the upper end of the tail pipe 28 through threads; a spring adjustment retainer 26 is fitted in the bottom of the outer sleeve 27, and the bottom end of the compression spring 25 abuts against the upper end of the spring adjustment retainer 26.

Referring to fig. 2, the rotary track groove 23 is unfolded, the transverse length is the perimeter of the central shaft 19, the overall shape is four zigzag broken lines, and what four zigzag shapes are the same is the opening track a; the four sawtooth shapes below are two of the closed track origin points b, the other two of the four sawtooth shapes are the open track origin points c, and the closed track origin points b and the open track origin points c are alternately arranged. Wherein the opening track origin c is mirror-inverted to the shape of the upper opening track a (corresponding to the upper trough); the tip of the closed track origin b is extended a distance beyond the tip of the open track origin c. The function of each part of the rotation track groove 23 is explained later in the working process.

An upper protruding part 101 and a lower protruding part 202 which protrude from the outer peripheral surface are respectively arranged at the lower end of the upper joint 1 and the upper end of the lower joint body 20, and the lower end of the upper protruding part 101 and the upper end of the lower protruding part 202 are respectively provided with a connector used for being connected with two ends of the pressure guide pipe 2.

The working principle of the invention is as follows:

in the process of descending the well, the sealing ring 6 and the ball body 7 are tightly attached together by the ball pressing spring 9 and are in a closed state, the channel of the device is blocked, well fluid below the device cannot enter the channel to ascend, and the function of blowout prevention is achieved. The upper joint 1 is arranged at the upper part of an oil well pump, and the lower part of the oil well pump is connected with the under-pump circulating type oil pipe hydraulic control environment-friendly blowout preventer. When the normal work is needed, the pump truck is used for positively pressurizing an oil pipe, the pressure is directly transmitted to the pressure guide pipe 2 of the upper joint 1, and the pressure is transmitted to a sealed annular cavity between the lower connector 20 and the central shaft 19 through the pressure guide pipe 2. After pressure bearing, the central shaft 19 moves linearly along the inner wall of the lower connecting body 20. The track pin 24 now moves from the closed track origin b into the open track a, pulling the ball 7 apart by means of the pull rod 11. After the pressure is released, the rail pin 24 is moved along the rotational rail groove 23 to the opening rail origin c by the compression spring 25. And normal operation is started.

When the channel needs to be closed again, the above process is only needed to be repeated, the track pin 24 on the lower connector 20 enters the closed track origin from the open track origin, and the circulating pulling system has the function of circulating and reusing.

Claims (4)

1. An environmental protection blowout prevention device for hydraulic control of a circulating oil pipe under the pump, characterized in that it comprises an upper joint (1) and a pressure guiding pipe (2) installed on the upper part of the oil pump (3), and a pressure guide pipe (2) installed on the upper part of the oil pump (3). ) at the lower part of the circulating working valve for repeatedly opening and closing the upper and lower passages, and a circulating pulling system for pulling the sphere (7) of the circulating working valve, the top of the circulating working valve is connected with the bottom end of the oil pump (3) ; The bottom end of the circulating working valve is connected with the top end of the circulating pulling system through the coupling pipe (17); the pressure guiding pipe (2) is connected between one side of the top end of the circulating pulling system and one side of the lower end of the upper joint (1). ) at both ends. 2. The under-pump circulating oil pipe hydraulically controlled environmental protection blowout prevention device according to claim 1, characterized in that the circulating working valve comprises a ball seat (4), a ball valve body (5), a sealing ring (6), Upper spring retaining ring (8), ball pressure spring (9), lower spring retaining ring (10), tie rod (11), upper coupling (12), screen tube (13), lower coupling (14), connecting sleeve ( 15), the nut (16) and the ball (7), the upper end of the ball valve body (5) is connected with the bottom end of the oil pump (3), and the upper part of the ball valve body (5) is provided with an inner flange As the valve seat (4), a sealing ring (6), a sphere (7), a spring upper retaining ring (8), a ball-pressing spring (9) and a lower spring retaining ring are arranged in sequence downward under the valve seat (4). ring (10), the top end of the pull rod (11) is connected with the ball (7), the bottom end of the pull rod (11) is connected with the connecting sleeve (15); the bottom end of the ball valve body (5) is connected through the upper coupling (12) ) is connected with the top end of the screen tube (13), and a spring lower retaining ring (10) for positioning the bottom end of the ball pressure spring (9) is arranged in the ball valve body (5); the bottom of the screen tube (13) The end is connected with the top end of the lower coupling (14); a snap ring is arranged in the lower coupling (14) for abutting the connecting sleeve (15); the bottom end of the lower coupling (14) is connected to the coupling Take over the top connection of (17). 3. The under-pump circulating oil pipe hydraulically controlled environmental protection blowout prevention device according to claim 2, characterized in that the circulating pulling system comprises a retaining ring (18), a central shaft (19), a lower connecting body (20) , upper O-ring (21), lower O-ring (22), track pin (24), compression spring (25), spring adjusting ring (26), outer sleeve (27) and tail pipe (28) , the top end of the lower connecting body (20) is connected with the bottom end of the coupling tube (17), a central axis (19) is arranged in the lower connecting body (20); Connecting L-shaped through holes (201), the outer ends of the L-shaped through holes (201) are connected with the lower end of the pressure guiding tube (2), and the inner peripheral surface of the lower body (20) is connected with the central axis (19) ) and the upper and lower positions of the L-shaped through hole (201) are respectively provided with an upper O-ring (21) and a lower O-ring (22) to form a sealed annular cavity; The lower outer peripheral surface of (19) is provided with a rotating track groove (23) that can repeatedly rotate 90° back and forth; on the inner side of the lower body (20), there is a track pin ( 24; (25), an outer sleeve (27) is sheathed around the compression spring (25); the upper end and the lower end of the outer sleeve (27) respectively pass through the bottom end of the lower body (20) and the upper end of the tail pipe (28) Threaded connection; a spring adjusting retaining ring (26) is installed in the bottom of the outer sleeve (27), and the bottom end of the compression spring (25) is in contact with the upper end of the spring adjusting retaining ring (26). 4 . The under-pump circulating oil pipe hydraulically controlled environmental protection blowout prevention device according to claim 3 , wherein the lower end of the upper joint ( 1 ) and the upper end of the lower joint body ( 20 ) are respectively provided with mutually corresponding The upper protruding part (101) and the lower protruding part (202) protruding from the outer peripheral surface, the lower end of the upper protruding part (101) and the upper end of the lower protruding part (202) are provided with The two ends of the pressure guiding tube (2) are connected to the interface.

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