CN207554012U - A kind of bottom hole blowout control check valve - Google Patents
A kind of bottom hole blowout control check valve Download PDFInfo
- Publication number
- CN207554012U CN207554012U CN201721439636.1U CN201721439636U CN207554012U CN 207554012 U CN207554012 U CN 207554012U CN 201721439636 U CN201721439636 U CN 201721439636U CN 207554012 U CN207554012 U CN 207554012U
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- China
- Prior art keywords
- valve
- piston
- valve body
- check valve
- ring seal
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Abstract
A kind of bottom hole blowout control check valve, technical solution are：In the centre bore of the valve body of shaft bottom check valve, valve seat and guide sleeve, from bottom to up equipped with a up-thin-low-thick piston；Steel ball in guide sleeve is lifted off the centre bore of valve seat by the upper end of piston；The O-ring seal that the lower end of piston is carried together with it by radially fixed two pins on body wall, is locked in the stepped hole among valve body, plays the role of blowout prevention.The O-ring seal of piston and its carrying under the fluid pressure above valve body and valve seat, after cutting off two pins on body wall, is detached from downwards valve body, check valve is made to enter normal working condition.Have the characteristics that blowout prevention is reliable, easy to operate, so as to avoid in installation process, because of the blowout risk of underground pressure wave movable property life.
Description
Technical field
The utility model is related to petroleum machinery, the improvement of " shaft bottom check valve " in drilling-production equipment.
Background technology
In oil field operation, when shaft bottom check valve is gone into the well with oil-immersed pump or oil pipe, since check valve remains
Current characteristic upwards, when encounter downhole petroleum pressure it is higher when, the danger of blowout can be generated.Therefore, to existing shaft bottom list
Blowout prevention is taken to design to valve, it is necessary.
Invention content
The utility model lies in that providing one kind has the function of blowout prevention, and the shaft bottom check valve subsequently normally produced is not influenced.
The technical solution of the utility model is：In the centre bore of the valve body of shaft bottom check valve, valve seat and guide sleeve, under
And Shangdi is equipped with a up-thin-low-thick piston；Steel ball in guide sleeve is lifted off the centre bore of valve seat by the upper end of piston；Piston
The O-ring seal that is carried together with it of lower end, by radially fixed two pins on body wall, be locked among valve body
In stepped hole.
The O-ring seal of piston and its carrying under the fluid pressure effect above valve body and valve seat, cuts off body wall
On two pins after, be detached from valve body downwards.
Since the utility model installs the blowout prevention structure of piston, O-ring seal and pin composition additional in the check valve of existing well bottom
Part blocks its Upwards channel, it is made to have the function of blowout prevention when entering shaft bottom.When check valve reach shaft bottom after, by tubing string to
Injection pressure liquid in valve body can make the piston of sealing ring with o cut off pin, be detached from valve body downwards, and check valve is made to restore upward
The function of oil transportation.
Description of the drawings
Fig. 1 is the full section schematic diagram of the utility model overall structure；
Fig. 2 is to the schematic diagram of overhead projection after cutting in Fig. 1 at A-A.
Parts title shown in attached figure label is as follows：
1st, piston, 2, O-ring seal, 3, pin, 4, valve body, 5, valve seat, 6, guide sleeve, 7, steel ball, 8, valve deck.
Specific embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings：
The utility model is to have installed blowout prevention component additional in existing shaft bottom check valve.Shaft bottom check valve is by valve body 4, valve
Seat 5, guide sleeve 6, steel ball 7, valve deck 8 are formed, integral into hollow cylindrical.The center of valve body 4 is the stepped hole of different-diameter,
It is the threaded hole for installing guide sleeve 6 above stepped hole, is the cylindrical hole for installing valve seat 5 below threaded hole, under valve seat orifice
Side is the access opening of crude oil, is the cylindrical hole of fixed piston 1 below access opening, is enlarged-diameter and opening below piston hole
Cylindrical passage bores；4 upper and lower ends of valve body are taper pipe threads, the porous oil being respectively intended to except connection valve deck 8 and this valve
Pipe；On the side wall of valve body 4, below the cylindrical hole of fixed piston 1, processing is used for there are two the minor thread hole of radial direction
Pin 3 is installed.Valve seat 5 is with hollow cylinder made of cemented carbide material, and endoporus is less than the diameter of steel ball 7, outer diameter and
Height and the valve seat orifice aperture in valve body 4 and highly consistent during assembling, are pressed into the valve seat orifice of valve body 4.Guide sleeve 6 is upper
Holding has the hollow cylinder of lid, on the cover board held on it, is machined with multiple uniformly distributed holes, while steel ball 7 are stopped, also allows
Liquid communication；External screw thread is machined on the lower circumferential of its hollow cylinder, is coupled with the threaded upper ends hole with valve body 4；
Equipped with steel ball 7 in its centre bore, deviate valve seat orifice to prevent it.Valve deck 8 is a hollow cylinder, and Taper Pipe is machined at its both ends
Internal thread is connected respectively with valve body 4 and external tubing string.
The blowout prevention component of the utility model is made of piston 1, O-ring seal 2 and pin 3.Piston 1 is upper thin for one
The cylinder of thick different-diameter down, cuts with a road sealing groove thereunder on thicker cylinder circumference, built-in O-ring seal 2,
To prevent pressure release；Edge in its lower face cuts with one of trough with straight angle, is contacted with the end of pin 3, carries out radial direction limiting.
Piston 1 is mounted in the centre bore of valve body 4, valve seat 5 and guide sleeve 6 from bottom to up, on 4 side wall of valve body
Two pins 3 are radially fixed, block the access opening of check valve, play the role of blowout prevention.The O-ring seal of piston 1 and its carrying
2, under the fluid pressure effect above valve body 4 and valve seat 5, after cutting off two pins 3 on 4 side wall of valve body, it is detached from valve downwards
Body 4 can be generally fallen into the porous oil pipe of lower section；At this point, check valve just enters normal working condition.
Claims (3)
1. a kind of bottom hole blowout control check valve, it is characterized in that：The valve body (4) of check valve, valve seat (5) and guide sleeve (6) in shaft bottom
In centre bore, from bottom to up equipped with a up-thin-low-thick piston (1)；The upper end of piston (1) is by the steel ball in guide sleeve (6)
(7), it is lifted off the centre bore of valve seat (5)；The O-ring seal (2) that the lower end of piston (1) is carried together with it, by radially fixed in valve
Two pins (3) on body (4) side wall are locked in the intermediate stepped hole of valve body (4).
2. bottom hole blowout control check valve according to claim 1, it is characterized in that：Piston (1) is up-thin-low-thick different straight for one
The cylinder of diameter cuts with a road sealing groove, built-in O-ring seal (2) thereunder on thicker cylinder circumference；In its lower end
The edge in face cuts with one of trough with straight angle, is contacted with the end of pin (3).
3. bottom hole blowout control check valve according to claim 1, it is characterized in that：Piston (1) and its O-ring seal carried
(2), under the fluid pressure effect above valve body (4) and valve seat (5), after cutting off two pins (3) on valve body (4) side wall,
It is detached from valve body (4) downwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721439636.1U CN207554012U (en) | 2017-10-27 | 2017-10-27 | A kind of bottom hole blowout control check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721439636.1U CN207554012U (en) | 2017-10-27 | 2017-10-27 | A kind of bottom hole blowout control check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207554012U true CN207554012U (en) | 2018-06-29 |
Family
ID=62681617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721439636.1U Active CN207554012U (en) | 2017-10-27 | 2017-10-27 | A kind of bottom hole blowout control check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207554012U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109252830A (en) * | 2018-11-21 | 2019-01-22 | 四川鹏成石油技术开发有限公司 | Presetting system ceramic throttling device and its implementation |
| CN112855066A (en) * | 2021-01-05 | 2021-05-28 | 孙淑芳 | From soluble bridging plug of taking fracturing ball |
-
2017
- 2017-10-27 CN CN201721439636.1U patent/CN207554012U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109252830A (en) * | 2018-11-21 | 2019-01-22 | 四川鹏成石油技术开发有限公司 | Presetting system ceramic throttling device and its implementation |
| CN112855066A (en) * | 2021-01-05 | 2021-05-28 | 孙淑芳 | From soluble bridging plug of taking fracturing ball |
| CN112855066B (en) * | 2021-01-05 | 2021-09-14 | 大安鸿源管业有限公司 | From soluble bridging plug of taking fracturing ball |
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