CN217872676U

CN217872676U - Bypass nipple joint with control pressure release function

Info

Publication number: CN217872676U
Application number: CN202221629134.6U
Authority: CN
Inventors: 朱秀红; 张信勇; 张恩鹏; 滕朔; 王�琦; 安轶文; 赵强; 董政; 王邦伟; 孟逸然; 赵春雷; 马晓强; 朋礼军; 王坤; 高波; 姜涛; 赵鹏飞; 张德红
Original assignee: Beijing Tianqing Lidu Technology Co ltd
Current assignee: Beijing Tianqing Lidu Technology Co ltd
Priority date: 2022-06-29
Filing date: 2022-06-29
Publication date: 2022-11-22
Anticipated expiration: 2032-06-29

Abstract

A bypass short section with a pressure release control function comprises a cylindrical body, wherein a cable leading-in hole communicated with the inside and the outside is formed in the side wall, a pressing cap, a rubber plug and a pressing pad are sequentially arranged in the outer side end of the cable leading-in hole in a matched mode, a well fluid pressure release hole is formed in the inner side end of the cable leading-in hole, a fluid flow control valve is connected and installed on the well fluid pressure release hole and has the function of controlling and removing the pressure of an inner cavity of the bypass short section, when the rubber plug is replaced at a well head, the fluid flow control valve can be opened firstly to drain well fluid in the body and guide the well fluid to return to the underground for circulation, personal injury and even damage caused by instant well fluid splashing during removal of the rubber plug are avoided, damage to a production environment and influence on an ecological environment caused by well fluid scattering in a well field are also avoided, meanwhile, a cable withdrawing blowout prevention mechanism is further arranged in the cable leading-in hole, the cable leading-in hole can be immediately blocked under the action of the well fluid pressure during drawing out in a working state, and the well fluid is prevented from bursting.

Description

Bypass nipple joint with control pressure release function

Technical Field

The utility model relates to a bypass nipple joint, concretely relates to bypass nipple joint with control pressure release function.

Background

The cable bypass short section is a common auxiliary tool in the oil field well logging production, and has the functions of leading in a cable from the outside to the inside of a drilling tool such as a drill rod or an oil pipe and the like, leading the cable into a water hole from the outside and connecting the cable with an underground instrument. Because the abrasion of the cable to the sealing element is very serious in the operation process, in order to ensure the production safety, the used sealing rubber plug is generally required to be regularly checked and replaced, and because a higher well hydraulic pressure can still remain in a shaft under the working state, a certain amount of well liquid can still flow back to the ground of a well mouth from the underground in the replacement process, the production environment of an oil field is damaged, and meanwhile, the ecological environment of a well field is also adversely affected.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a bypass nipple joint with control pressure release function, can the pre-control dump inner chamber pressure, improve the security and the feature of environmental protection that production was used.

A bypass short section with a pressure relief control function comprises: the pressure cap, the rubber plug and the pressure pad are matched with each other to seal a space gap between a cable passing through the cable lead-in hole and the cable lead-in hole, a well fluid pressure relief hole for communicating the cable lead-in hole and an external environment is additionally arranged at the inner side end of the cable lead-in hole, a fluid flow control valve is connected to the well fluid hole and can control the pressure relief of the well fluid pressure relief hole to be opened or closed, and the well fluid pressure in the body can be removed through leading and discharging the well fluid when the well fluid pressure relief hole is opened.

The bypass short joint with the function of controlling pressure relief preferably comprises a cock control valve, wherein the cock control valve: the method comprises the following steps: the main valve body is internally provided with a valve cavity with two communicated ends, the inner sealing pad and the outer sealing pad are both in circular ring structures, the sealing ball is in a spherical structure, a communicating hole which is communicated along an axis is formed in the ball body, the aperture of the communicating hole corresponds to the aperture of an inner hole of the inner sealing pad and the aperture of an inner hole of the outer sealing pad, spherical sealing surfaces which are correspondingly matched with the spherical surfaces of the sealing ball are arranged at the corresponding ends of the inner sealing pad and the outer sealing pad, the inner sealing pad, the sealing ball and the outer sealing pad are sequentially combined and limited in the valve cavity of the main valve body, the sealing ball is matched with the spherical sealing surfaces of the inner sealing pad and the outer sealing pad and can rotate relative to the inner sealing pad and the outer sealing pad, when the communicating hole on the sealing ball is coaxial with the main valve body, the valve cavity is in an open state, when the communicating hole on the sealing ball is axially vertical to the inner sealing pad, the valve cavity is in a closed state, a through hole corresponding to the position where the sealing ball is arranged on the side wall of the main valve cavity, the plug device is arranged in the main valve cavity, and the coaxial rotating control plug button is connected with the end of the rotating ball, and the end of the plug is in a rotating state, and the rotating of the valve cavity.

The bypass nipple with the function of controlling pressure release is characterized in that a limit sleeve is preferably arranged in the through hole in a limiting mode relative to the main valve body, the limit sleeve is sleeved on the plug knob, a limit groove with a radian angle a is formed in the inner circumferential surface of the plug knob, a limit pin is correspondingly installed on the plug knob, the limit pin is embedded in the limit groove in a matching mode to limit the rotation stroke of the plug knob relative to the limit sleeve, the turning angle of the sealing ball is controlled to be kept at 90 degrees, and the matching of the limit pin at the two end positions of the limit groove corresponds to the opening state and the closing state of the valve cavity respectively.

The bypass nipple with the function of controlling pressure release is characterized in that a valve port of the cock control valve is preferably connected with a guide exhaust pipe, the guide exhaust pipe extends to a wellhead of an oil well, well liquid guided and discharged by the cock control valve can be directly guided and returned to the underground for circulation, and damage and influence on production environment and ecological environment caused by well site scattering are avoided.

The bypass short joint with the pressure relief control function is further preferably provided with a cable withdrawing blowout prevention mechanism in the cable guide hole, and the cable withdrawing blowout prevention mechanism comprises: the blowout prevention ball is accommodated in the inner cavity of the pressure pad and corresponds to the accommodating position of the blowout prevention ball, a through channel capable of enabling the blowout prevention ball to move is formed in the side wall of the pressure pad, a spring groove correspondingly communicated with the through channel is formed in the body, the push spring is embedded in the spring groove and supported between the body and the blowout prevention ball, elastic thrust towards the direction of the cable leading-in hole is applied to the blowout prevention ball, the blowout prevention ball is extruded into the through channel through a cable penetrating through the cable leading-in hole in the working state, when a downhole instrument is used for shearing the cable to release and the cable is drawn out from the cable leading-in hole, the blowout prevention ball is pushed into the inner cavity of the pressure pad through the push spring and abuts against the upper end opening of the inner cavity of the pressure pad under the action of well hydraulic pressure, the cable leading-in hole is blocked by matching with the pressure pad, and well liquid is prevented from overflowing, and the purpose of self blowout prevention is achieved.

The beneficial effects of the utility model are that, a bypass nipple joint with control pressure release function is provided, through set up the well liquid pressure release hole that link up cable inlet hole lateral wall on the body and connect installation liquid flow control valve, when changing the plug at the well head, can open the liquid flow control valve earlier, this internal well liquid pressure is discharged to drainage well liquid, and will discharge well liquid water conservancy diversion and return the circulation in the pit, both solved and demolish the plug in the twinkling of an eye the personal damage that well liquid splashes and probably causes or even harm, and can also avoid well liquid scattering well site to cause the destruction and the ecological environment's of production environment influence, and simultaneously, still be provided with in the cable inlet hole and remove the cable and prevent spouting the mechanism, when taking out the cable under operating condition from the cable inlet hole, can block the cable inlet hole under the effect of well liquid pressure immediately, prevent the well liquid upwelling, reach the effect of preventing spouting certainly, further improve the security of production and application.

Drawings

Fig. 1 is an overall structure diagram of a bypass short section with a function of controlling pressure relief.

Fig. 2 isbase:Sub>A partial sectional view taken along linebase:Sub>A-base:Sub>A of fig. 1.

Fig. 3 is a partial enlarged view of the point i in fig. 1.

Fig. 4 is a partial sectional view taken along line B-B of fig. 3.

FIG. 5 is a partial cross-sectional view of the plug control valve of FIG. 4 taken along line C-C.

Detailed Description

The technical solution claimed in the present invention is further described below with reference to the following specific embodiments and accompanying drawings.

A bypass short section with a pressure relief control function is composed of a body 1, a pressure cap 2, a rubber plug 3, a pressure pad 4, a blowout prevention ball 14, a push spring 15 and a cock control valve 10, as shown in figures 1 and 2.

Set up the cable inlet hole that the slope set up on the lateral wall of body 1, as shown in fig. 1, have the footpath on the inside wall of cable inlet hole and contract the circular bead, set up the internal thread on the outside end, press cap 2, plug 3 and pressure pad 4 configuration setting in the cable inlet hole, wherein: the pressure pad 4 is supported on the radial-shrinkage shoulder in a limiting manner, the pressure cap 2 is installed on an outer end port of the cable leading-in hole in a threaded manner, the pressure cap 2 and the pressure pad 4 are arranged between the pressure cap 2 and the pressure pad 4 in a matched and extruded manner, the rubber plug 3 is arranged between the pressure cap 2 and the pressure pad 4 in a sealing manner, the rubber plug 3 expands radially to deform and penetrates through a space gap between a cable of the cable leading-in hole and the inner wall of the cable leading-in hole, the aperture of an inner cavity of the pressure pad 4 is larger than the apertures of ports at two ends of the pressure pad 4, a through channel is formed in the side wall of the pressure pad 4, as shown in fig. 2, the blowout prevention ball 14 is accommodated in the inner cavity of the pressure pad 4, the outer diameter of the blowout prevention ball is larger than the apertures of the ports at two ends of the pressure pad 4 and smaller than the aperture of the through channel on the side wall of the pressure pad 4, a spring through hole correspondingly communicated with the through channel is formed in the body 1, a process bolt 16 is installed on an outer port of the spring through hole to form a spring groove, the push spring 15 is embedded in the spring groove, and applies elastic thrust force towards the blowout prevention ball 14 in a direction of the cable leading-in the direction of the blowout prevention hole.

A well fluid pressure relief hole is formed at the inner side end of the cable lead-in hole, as shown in fig. 3, the main valve body 5 of the cock control valve is installed on the main body 1 by corresponding bolt connection with the well fluid pressure relief hole, the inner side valve port is communicated with the well fluid pressure relief hole on the main body 1, the outer side valve port is connected with a screwed pipe guide pipe 11, a reducing shoulder is arranged in the valve cavity, an inner sealing gasket 7, a sealing ball 6 and an outer sealing gasket 8 are sequentially combined and arranged in the valve cavity of the main valve body 5, the inner sealing gasket 7 is arranged on the reducing shoulder, the outer side valve port is limited and locked by a locking nut to the outer sealing gasket 8, the combination of the inner sealing gasket 7, the sealing ball 6 and the outer sealing gasket 8 is fixed in the valve cavity, a communication hole is formed on the sealing ball 6 and is arranged between the inner sealing gasket 7 and the outer sealing gasket 8 in a matching manner, the valve body can rotate relative to the inner sealing gasket 7 and the outer sealing gasket 8, the valve cavity can be respectively formed into an opening state and a closing state by matching the inner sealing gasket 7 and the outer sealing gasket 8, as shown in fig. 4, a through hole is further formed in the side wall of the main valve body 5, the through hole is perpendicular to the direction of the valve cavity and corresponds to the arrangement position of the sealing ball 6, a cock button 9 and a limiting sleeve 12 are embedded in the through hole, the outer end of the cock button 9 is provided with an inner hexagonal wrench opening, the inner end of the cock button 9 forms a square key pin matching with the sealing ball 6, a limiting pin 13b is installed on the side circumferential surface, the limiting sleeve 12 is sleeved on the cock button 9, the inner end of the cock button is sealed and limited by an inner raised platform in the through hole, the outer end of the cock button is locked and fixed by a locking nut, and the outer circumferential surface is limited in rotation by a positioning screw 16 installed on the main valve body 5, meanwhile, as shown in fig. 5, an arc-shaped limiting groove 13a is further formed in the inner circumferential surface of the limiting sleeve 12, the limiting groove 13a has an arc angle a, and forms a bushing fit with a limiting pin 13b on the plug button 9, the plug button 9 is limited to move towards the limiting sleeve 12 in the axial direction, the rotation stroke of the plug button 9 relative to the limiting sleeve 12 is limited in the circumferential direction, the turning angle of the sealing ball 6 is controlled to be kept at 90 degrees, and the matching of the limiting pin 13b at two end positions of the limiting groove 13a corresponds to the opening state and the closing state of the valve cavity respectively.

Claims

1. The utility model provides a bypass nipple joint with control pressure release function which characterized in that includes: the hydraulic well fluid pressure relief device comprises a body (1), wherein the whole body (1) is cylindrical, an internal thread is arranged at the upper end of the whole body, an external thread is arranged at the lower end of the whole body, a cable leading-in hole communicated with the inside and the outside is formed in the side wall of the body (1), a pressure cap (2), a rubber plug (3) and a pressure pad (4) are sequentially arranged in the cable leading-in hole in a matched mode, a well fluid pressure relief hole for enabling the cable leading-in hole to be communicated with the external environment is additionally formed in the inner side end of the cable leading-in hole, a fluid flow control valve is connected and installed on the well fluid pressure relief hole, and the fluid flow control valve can control the well fluid pressure relief hole to be opened or closed.

2. The bypass sub with function of controlling pressure relief according to claim 1, characterized in that said flow control valve is a cock control valve which: the method comprises the following steps: the valve comprises a main valve body (5), a sealing ball (6), an inner sealing gasket (7), an outer sealing gasket (8) and a cock button (9), wherein a valve cavity with two communicated ends is formed in the main valve body (5), the inner sealing gasket (7) and the outer sealing gasket (8) are both in circular ring structures, the sealing ball (6) is in a spherical structure, a communicating hole which is communicated along an axis is formed in the ball body, the aperture of the communicating hole corresponds to the aperture of an inner hole of the inner sealing gasket (7) and the aperture of an inner hole of the outer sealing gasket (8) respectively, meanwhile, spherical sealing surfaces which are correspondingly matched with the spherical surface of the sealing ball (6) are arranged at the corresponding ends of the inner sealing gasket (7) and the outer sealing gasket (8) respectively, the inner sealing gasket (7), the sealing ball (6) and the outer sealing gasket (8) are sequentially combined and limited in the valve cavity of the main valve body (5), the sealing ball (6) is mutually matched with the spherical sealing surfaces on the inner sealing gasket (7) and the outer sealing gasket (8) respectively and can rotate relative to the inner sealing gasket (7) and the outer sealing gasket (8), when the valve cavity (6) and the valve cavity (5) are in a coaxial state, the valve cavity is opened and the valve cavity, when the valve is in a state, a through hole is formed in the side wall of the main valve body (5) corresponding to the position of the sealing ball (6), the plug button (9) is limited in the through hole, the end head of the outer side is provided with a turning structure, and the end head of the inner side is in key-pin fit connection with the sealing ball (6), so that the axial rotation of the plug button (9) can drive the sealing ball (6) to coaxially turn over.

3. The bypass sub with the function of controlling pressure relief as claimed in claim 2, wherein: the through hole is further provided with a limiting sleeve (12) in a limiting mode relative to the main valve body (5), the limiting sleeve (12) is sleeved on the plug button (9), a limiting groove (13 a) with a radian angle a is formed in the inner circumferential surface of the limiting sleeve, meanwhile, a limiting pin (13 b) is correspondingly installed on the plug button (9), the limiting pin (13 b) is embedded in the limiting groove (13 a) in a matching mode to limit the rotation stroke of the plug button (9) relative to the limiting sleeve (12), the turning angle of the sealing ball (6) is controlled to be kept at 90 degrees, and the limiting pin (13 b) is enabled to correspond to the opening state and the closing state of the valve cavity respectively in the matching mode at two end positions of the limiting groove (13 a).

4. The bypass sub with the function of controlling pressure relief as claimed in claim 3, wherein: and a guide exhaust pipe (11) is connected and installed on a valve port of the cock control valve.

5. The bypass sub with the function of controlling pressure relief according to any one of claims 1 to 4, characterized in that: be provided with in the cable guide-in hole and remove cable blowout prevention mechanism, remove cable blowout prevention mechanism includes: the cable guide device comprises a blowout prevention ball (14) and a push-in spring (15), wherein the blowout prevention ball (14) is accommodated in an inner cavity of the pressure pad (4) and corresponds to the accommodating position of the blowout prevention ball (14), a through channel is formed in the side wall of the pressure pad (4), a spring groove correspondingly communicated with the through channel is formed in the body (1), the push-in spring (15) is embedded in the spring groove and supported between the body (1) and the blowout prevention ball (14), and elastic thrust in the direction towards the cable guide hole is applied to the blowout prevention ball (14).