CN203961908U - Concentric production pressure transmission device - Google Patents

Abstract

The utility model provides a pressure device is passed in concentric type production, comprising a main body, the inner chamber has been seted up along the axial in the main part, the upper end of inner chamber is open, the lower extreme seals, still run through on the main part lateral wall be equipped with inner chamber parallel arrangement pass and press the passageway, be equipped with the packing subassembly in the inner chamber, the lateral wall that packing subassembly and inner chamber can separate links together, the inner chamber is separated by the packing subassembly and is held back the pressure release chamber of pressing chamber and lower part on upper portion, the pressure drive that presses the chamber through the control holds back the pressure that packs the subassembly and the lateral wall of inner chamber and breaks away from mutually, it has the feed liquor hole to radially run through along it on the lateral wall in pressure release chamber, the feed liquor hole with pass. The utility model discloses a pressure transmission device is produced to concentric type, the pretightning force top that the steel ball passes through the spring supports on the sliding sleeve, when having guaranteed the pressure transmission with the abundant sealing of steel ball sliding sleeve, because the inner chamber of main part is the feed liquor main entrance, in the exploitation in-process, can not appear leading to the stifled dead condition of water shutoff switch because of oil well sand production or well are dirty etc..

Description

Concentric type production pressure transmission device

Technical Field

The utility model relates to a production passes pressure equipment, especially a concentric type production passes pressure equipment for oil development.

Background

In the process of exploiting a small-interlayer high-water-content oil layer of a heavy oil block in an oil field, the water plugging pipe column used for mining under sealing is adopted to realize the functions of water plugging and production, because sand production and pump detection of the oil well are frequent, the water plugging pipe column used for mining under sealing is mostly a release pipe column, the pipe column structure sequentially comprises a plug, a K341 long rubber sleeve packer, a lateral single-remaining valve and a release packer from bottom to top, and the upper part is exploited by a tubular pump. The key part of this tubular column is the valve is singly stayed to the side direction, and it can guarantee the long packing element packer setting demand of K341 with pressure transmission lower part packer, makes the packer set back can also satisfy the demand of viscous crude feed liquor.

As shown in fig. 1, the lateral single-retaining valve comprises a hollow tubular connector 2, two ends of the connector 2 are respectively connected with an upper connector 6 and a lower connector 1, the lower connector 1 can be connected with a K341 long packing element packer, pressure is transmitted to the K341 long packing element packer through the inner cavity of the upper connector 6, the connector 2 and the lower connector 1 to enable the packer to be sealed, a switch ball seat 3 is arranged on the pipe wall of the lower connector 1, a steel ball 9 is arranged on the switch ball seat 3, a liquid inlet cylinder sleeve 5 is sleeved outside the connector 2, an oil inlet 8 on the liquid inlet cylinder sleeve 5 is communicated with the inner cavity of the switch ball seat 3, and further communicated with the inner cavity of the connector 2 to enable thick oil to enter. However, when the lateral single-retention valve is implemented on site, the leakage and no-pressure of the single-retention valve often occur when the existing lateral single-retention valve is set, the packer is not set or the exploitation is affected due to the small lateral single-retention valve channel in the exploitation process, and the pump detection period of an oil well is shortened.

The other water shutoff switch for oil field well water shutoff in the prior art, namely the oil field well single flow eccentric water shutoff switch, comprises a lower joint, a central tube, a switch ball seat, a limit piston, an outer sleeve, an upper joint and a switch ball, wherein one end of the central tube is connected with the lower joint, the other end of the central tube is connected with the upper joint, the outer sleeve is sleeved outside the central tube, an annular space is arranged between the inner wall of the outer sleeve and the outer wall of the central tube, the annular switch ball seat is arranged in the annular space and divides the annular space into an upper annular space and a lower annular space, the upper annular space is provided with the annular limit piston capable of sliding in the upper annular space, and the switch ball is arranged between, because the liquid can only flow into the central tube after sequentially flowing through the holes, the holes and can not flow out of the central tube, therefore, the switch can conveniently realize the function of single-flow water shutoff, but the device also has the problems that the pipe column does not generate pressure and the liquid inlet channel is small when the switch ball seat and the ball seat are not tightly sealed.

Although the prior art can meet the production function and can transmit pressure to the lower packer, the ball seats and the balls are not tightly seated, and a pipe column is not pressed during the setting, or because a liquid inlet channel is small, a single remaining valve can be blocked to influence the exploitation if sand or dirt is produced from an oil well in the exploitation process.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a pressure transmission device is produced to concentric type to solve the ball seat that prior art exists and ball seat seal tight, the easy stifled dead problem of leaving the valve among the exploitation process.

In order to solve the above-mentioned purpose, the utility model provides a pressure device is passed in concentric type production, including the main part the inner chamber has been seted up along the axial in the main part, the upper end of inner chamber is open, and the lower extreme is sealed still run through on the main part lateral wall be equipped with inner chamber parallel arrangement's biography pressure passageway be equipped with the packing subassembly in the inner chamber, the packing subassembly with the lateral wall of inner chamber can separate to link together, the inner chamber by the packing subassembly is separated for the decompression chamber of suppressing pressure chamber and lower part on upper portion, through control the pressure drive in the suppression pressure chamber the packing subassembly with the lateral wall of inner chamber breaks away from mutually, it has the feed liquor hole to radially run through along it on the lateral wall in decompression chamber, the feed liquor hole with pass and press the passageway each other not communicate.

The concentric production pressure transmission device comprises a sealing assembly, wherein the sealing assembly comprises a sliding sleeve which is detachably connected with the side wall of the inner cavity, the sliding sleeve is in sealing joint with the side wall of the inner cavity, a steel ball is arranged at the upper port of the sliding sleeve, a spring is propped between the steel ball and the upper end of the inner cavity, and the steel ball is in sealing joint with the upper port of the sliding sleeve.

The concentric production pressure transmission device is characterized in that the sliding sleeve is fixedly connected with the side wall of the inner cavity through knocking off a pin.

The concentric production pressure transmission device comprises a steel ball, a pressure holding cavity, a spring, a blocking cap and a pressing block, wherein the blocking cap is fixed at the upper end of the inner cavity, the blocking cap is provided with a through hole communicated with the pressure holding cavity, and the spring is abutted between the blocking cap and the steel ball.

The concentric production pressure transmission device comprises a sliding sleeve, a steel ball and a steel ball, wherein the sliding sleeve is arranged on the steel ball, the end face of the sliding sleeve contacting the steel ball is a conical surface, and the diameter of the upper end of the conical surface is larger than that of the lower end of the conical surface.

The concentric production pressure transmission device as described above, wherein the upper end of the main body is connected to an upper joint, and the lower end of the main body is connected to a lower joint.

The concentric production pressure transmission device is characterized in that the bottom of the pressure relief cavity is provided with a V-shaped groove which is concave downwards.

The concentric production pressure transmission device is characterized in that a sealing ring is arranged between the packing component and the inner cavity side wall.

Compared with the prior art, the utility model discloses a concentric type production passes pressure equipment's characteristics and advantage lie in:

1. the concentric production pressure transmission device of the utility model arranges the sliding sleeve and the steel ball in the main channel inner cavity of the main body, the steel ball is propped against the sliding sleeve through the pretightening force of the spring, thereby ensuring the full sealing of the steel ball and the sliding sleeve when the pressure is transmitted, and the pressure transmission hole is arranged on the side wall of the main body and is used for transmitting the pressure to the lower packer, so that the lower packer is set; in addition, because the inner cavity of the main channel of the main body is a liquid inlet channel, the situation that the water shutoff switch is blocked due to sand production of an oil well or dirt of the oil well cannot occur in the process of exploitation.

2. The concentric production pressure transmission device adopts the knocking pin to fixedly connect the sliding sleeve with the side wall of the main body, after the pressure in the pressure-building cavity reaches a certain value, the knocking pin is broken, and the steel ball and the sliding sleeve fall into the lower part of the pressure-relief cavity, so as to prevent the steel ball and the sliding sleeve from blocking the oil liquid from flowing into the inner cavity of the main body; in addition, the impact force generated when the sliding sleeve falls is buffered by the aid of the V-shaped groove concavely arranged at the bottom of the pressure relief cavity.

Drawings

The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein,

FIG. 1 is a schematic view of a prior art lateral stay valve;

fig. 2 is a schematic view of the concentric type production pressure transmission device of the present invention.

Main element number description:

1 lower connector, 2 connector and 3 switch ball seats

5 liquid inlet cylinder sleeve 6 upper joint 8 oil inlet hole

9 Steel ball

10 main body 11 pressure transfer hole 12 pressure-building cavity

13 pressure relief cavity 14 feed liquor hole 15 breaks pin

20 sliding bush 21 steel ball 22 spring

23 stop cap 25 sealing ring

30 top connection 31 fixing nail

40 lower joint 41 fixing nail

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 2, the present invention provides a concentric type production pressure transmission device for liquid inlet and pressure transmission in oil production, which comprises a main body 10, an inner cavity is axially disposed in the main body 10 as a liquid inlet channel, the upper end of the inner cavity is open, the lower end is closed, a pressure transmission channel 11 disposed in parallel with the inner cavity is further disposed on the sidewall of the main body 10 for transmitting pressure, a packing component is disposed in the inner cavity, the packing component is separably connected to the sidewall of the inner cavity, the inner cavity is divided into an upper pressure-holding cavity 12 and a lower pressure-releasing cavity 13 by the packing component, the pressure-holding cavity 12 is connected to an external pressure supply system, the pressure supply system supplies pressure to the pressure-holding cavity 12 and the pressure-transmitting channel 11, the pressure-holding cavity 12 is controlled by the external pressure supply system to drive the packing component to be separated from the sidewall of the inner cavity, a liquid inlet 14 radially penetrates through the sidewall of the pressure-releasing cavity 13, the liquid inlet hole 14 is not communicated with the pressure transfer channel 11. Wherein, a sealing ring 25 is arranged between the packing component and the side wall of the inner cavity, so that the packing component is in sealing joint with the side wall of the inner cavity. When the packing component is separated from the inner cavity side wall, the pressure-building cavity 12 is communicated with the pressure-relief cavity 13, oil layer liquid enters the pressure-relief cavity 13 from the liquid inlet hole 14, then enters the oil pipe from the pressure-building cavity 12, and returns to the ground through the upper oil-well pump.

In the embodiment shown in fig. 2, the packing assembly includes a sliding sleeve 20 detachably connected to the inner cavity side wall, the sliding sleeve 20 is in sealing engagement with the inner cavity side wall, a steel ball 21 is disposed at the upper port of the sliding sleeve 20, and a spring 22 is supported between the steel ball 21 and the upper end of the inner cavity to make the steel ball 21 in sealing engagement with the upper port of the sliding sleeve 20. The steel ball 21 is propped against the hollow sliding sleeve 20 through the spring 20, so that pretightening force is generated between the steel ball 21 and the sliding sleeve 20, the problem that the steel ball 21 and the sliding sleeve 20 are not tightly seated in the prior art is effectively solved, in addition, a sealing ring 25 is arranged between the sliding sleeve 20 and the side wall of the inner cavity, and the sealing performance of the pressure-holding cavity 12 is further ensured during pressure transmission.

The end face of the sliding sleeve 20 contacting the steel ball 21 is a conical surface, and the diameter of the upper end of the conical surface is larger than that of the lower end thereof. The end face of the sliding sleeve 20 is designed to be a conical surface, so that the steel ball 21 and the sliding sleeve 20 can be fully sealed.

In a possible technical solution, the sliding sleeve 20 is fixedly connected with the inner cavity sidewall by the knock-off pin 15, so that the sliding sleeve 20 and the inner cavity sidewall can be separated from each other after the knock-off pin 15 is broken, but not limited to this, the sliding sleeve 20 and the inner cavity sidewall can also be connected by other separable connection methods.

In addition, a stop cap 23 is fixed at the upper end of the inner cavity, a through hole communicated with the pressure-building cavity 12 is arranged on the stop cap 23, and the spring 22 is propped against between the stop cap 23 and the steel ball 21. The spring 22 is positioned by arranging the blocking cap 23, the blocking cap 23 is provided with a through hole so that the oil supply layer liquid flows out of the pressure building cavity 12, the through hole can be a round hole, a square hole and the like, and the arrangement mode of the through hole can be set according to actual needs. In this embodiment, the blocking cap 23 is screw-coupled to the inner cavity sidewall of the body 10.

As shown in fig. 2, the upper end of the main body 10 is connected to an upper joint 30, the lower end of the main body 10 is connected to a lower joint 40, and the main body 10 and the upper joint 30, the main body 10 and the lower joint 40 are connected by threads and are fixed by a fixing nail 31 and a fixing nail 41 respectively.

When the hydraulic fracturing device is used, pressure is transmitted to the pressure building cavity 12 to generate pretightening force for the steel ball 21 and the sliding sleeve 20 at the upper part, meanwhile, the pressure is transmitted to the lower part packer through the pressure transmission channel 11, when the upper and lower part packers reach setting pressure, the pressure is continuously built, for example, 2MPa-3MPa, the breaking pin 15 is broken, the sliding sleeve 20, the steel ball 21 and the spring 22 all fall into the lower part of the pressure building cavity 13, and oil layer liquid enters the inner cavity of the main body 10 through the liquid inlet hole 14 and then enters the oil pipe to be produced. A V-shaped groove is formed at the bottom of the pressure relief cavity 13 in a downward concave mode, and therefore the falling element is buffered. In this embodiment, the diameter of main part 10 inner chamber is 60mm, and the aperture of pressure transmission passageway 11 is 10mm, regards main part 10 inner chamber as the sprue of oil reservoir liquid, can effectively avoid conventional side direction singly to stay valve and singly stay eccentric water shutoff switch etc. and can not hit because of steel ball and ball seat, and the steel ball removes the space limited, and later stage sand grain, foul etc. get into and easily cause the condition that the runner blocks up.

The utility model discloses a pressure device is passed in concentric type production not only is applicable to the viscous crude well, also is applicable to thin oil well, high condensation oil well (high condensation oil is more than 40 ℃ of freezing point, the high crude oil of wax content), still can be applied to the exploitation of oil wells such as highly deviated well and horizontal well simultaneously.

The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any person skilled in the art should also realize that such equivalent changes and modifications can be made without departing from the spirit and principles of the present invention. Moreover, it should be noted that the components of the present invention are not limited to the above-mentioned integral application, and various technical features described in the present invention can be selected to be used alone or in combination according to actual needs, so that the present invention naturally covers other combinations and specific applications related to the invention of the present invention.

Claims (8)

1. The utility model provides a pressure device is passed in concentric type production, its characterized in that, pressure device is passed in concentric type production includes the main part the inner chamber has been seted up along the axial in the main part, the upper end of inner chamber is open, and the lower extreme is sealed still run through be equipped with on the main part lateral wall with inner chamber parallel arrangement's pressure transfer passageway be equipped with the packing subassembly in the inner chamber, the packing subassembly with the lateral wall of inner chamber can separate to link together, the inner chamber by the packing subassembly is separated for the suppress pressure chamber on upper portion and the pressure release chamber of lower part, through control the pressure drive in the suppress pressure chamber the packing subassembly with the lateral wall of inner chamber breaks away from mutually, it has the feed liquor hole to run through along its radial on the lateral wall in pressure release chamber, the feed liquor hole with the pressure transfer passageway is not mutually linked together.

2. The concentric production pressure transfer device of claim 1, wherein the packing assembly comprises a sliding sleeve separably connected to the sidewall of the inner chamber, the sliding sleeve sealingly engages the sidewall of the inner chamber, a steel ball is disposed at an upper port of the sliding sleeve, a spring is disposed between the steel ball and the upper end of the inner chamber, and the steel ball sealingly engages the upper port of the sliding sleeve.

3. The concentric production pressure transfer device of claim 2, wherein the sliding sleeve is fixedly attached to the sidewall of the chamber by removing a pin.

4. The concentric production pressure transmission device according to claim 2, wherein a stop cap is fixed to the upper end of the inner chamber, a through hole communicated with the pressure-holding chamber is formed in the stop cap, and the spring abuts between the stop cap and the steel ball.

5. The concentric production pressure transfer device of claim 2, wherein the end surface of the sliding sleeve contacting the steel ball is a conical surface, and the diameter of the upper end of the conical surface is larger than that of the lower end thereof.

6. The concentric production pressure transfer device of claim 1, wherein the upper end of the body is connected to an upper adapter and the lower end of the body is connected to a lower adapter.

7. The concentric type production pressure transmission device of claim 1, wherein the pressure relief cavity is provided with a V-shaped groove at the bottom thereof.

8. The concentric production pressure transfer device of claim 1, wherein a seal is disposed between the packer assembly and the sidewall of the interior chamber.