CN202100234U - Irregular-shaped check valve - Google Patents
Irregular-shaped check valve Download PDFInfo
- Publication number
- CN202100234U CN202100234U CN2011202061124U CN201120206112U CN202100234U CN 202100234 U CN202100234 U CN 202100234U CN 2011202061124 U CN2011202061124 U CN 2011202061124U CN 201120206112 U CN201120206112 U CN 201120206112U CN 202100234 U CN202100234 U CN 202100234U
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- CN
- China
- Prior art keywords
- valve seat
- water conservancy
- drive block
- conservancy diversion
- connection
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- Expired - Fee Related
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Abstract
The utility model relates to the technical field of underground inner blowout preventing devices of underbalance wells, in particular to an irregular-shaped check valve. The irregular-shaped check valve comprises a barrel body, a valve seat, a compression spring, driving blocks, a guide locking joint and a valve core. The valve seat is barrel-shaped, the inner side of the lower portion of the barrel body is fixedly provided with a barrel body inner boss, the outer side of the lower end of the valve seat is fixedly provided with a valve seat outer boss, and the valve seat outer boss is fixedly arranged on the barrel body inner boss. An annular cavity is defined by the valve seat, the valve seat outer boss and the barrel body, and the compression spring is arranged in the cavity and sleeved on the valve seat. At least two driving blocks capable of moving vertically are arranged above the valve seat. The irregular-shaped check valve is reasonable and compact in structure and convenient to use. The valve core is automatically unfolded through washing of drilling fluid, and simultaneously the valve core is automatically closed through the compression spring. The irregular-shaped check valve can be applicable for various conditions including liquid state or gas fluid and the like, thereby not only reducing cost and improving generality, but also reducing potential safety hazard.
Description
Technical field
The utility model relates to and is used for blowout hookup technical field in the underbalance well down-hole, is a kind of special-shaped flap valve.
Background technology
When implementing under-balance drilling operation, must mounting shaft on drilling tool down in the blowout prevention instrument, prevent to make up a joint or the round trip process in the backflow of drill string inner fluid or the rig floor face of gushing out, increased the risk of shaft mouth operation, even possibly cause the blowout out of control accident; The blowout prevention instrument is flechette-type ball-and-seat and shutter-type float valve in two kinds of down-holes commonly used at present; This valve member of flechette-type ball-and-seat can be used in pure gaseous fluid, pure liquid phase fluid and the under balance pressure drilling of gas-liquid miscible fluids; Have one-way sealing effect preferably, but its sealing mechanism utilizes the metal light face sealing between spool and the valve body, and the fineness of contact surface is had relatively high expectations; Processing charges is high, and cost is big; Because drilling fluid directly washes away sealing surface in the drilling process, sealing surface is denuded easily and is formed the earthworm hole, causes seal failure, and valve member loses unidirectional check function; This valve member one-way sealing effect of shutter-type float valve is more reliable than the flechette-type ball-and-seat, and sealing effectiveness is better, is widely used in nearly drill bit place in the under-balance drilling operation, plays the effect of two female crossover subs and one way stop peturn valve simultaneously; But the spool of this valve member is connected with cylindroid helical-coil torsion spring with valve seat; The flap accident that drops appears in the drilling fluid under-balance drilling operation that uses the liquid phase large percentage easily; Therefore its in such under-balance drilling operation, to use risk bigger, have potential safety hazard.
Summary of the invention
The utility model provides a kind of special-shaped flap valve, has overcome the deficiency of above-mentioned prior art, and its cost that can effectively solve the flechette-type ball-and-seat is high and fragile; Shutter-type float valve versatility difference and the problem that has potential safety hazard.
The technical scheme of the utility model realizes through following measure: a kind of special-shaped flap valve comprises cylindrical shell, valve seat, compression spring, drive block, water conservancy diversion lock-on connection and spool; Valve seat is tubular, is fixed with the cylindrical shell inner convex platform in the lower inside of cylindrical shell, and the lower outside of valve seat is fixed with the valve seat outer lug boss; The valve seat outer lug boss is fixedly mounted on the cylindrical shell inner convex platform; Between valve seat, valve seat outer lug boss and cylindrical shell, form the cavity of annular, the compression spring is installed in cavity and is sleeved on the valve seat; At least two drive blocks that can move up and down are arranged above valve seat, and the lower end of drive block contacts in cavity and with the top of compression spring; The inboard of drive block is taper wide at the top and narrow at the bottom; Drive block dovetail groove is from top to bottom arranged respectively on the inwall of each drive block; Be fixedly connected with the water conservancy diversion lock-on connection on the cylindrical shell of drive block top; There is flow channels the inside of water conservancy diversion lock-on connection, and the outside, bottom of water conservancy diversion lock-on connection is taper wide at the top and narrow at the bottom and matches with the inboard of drive block; With the lower end of the corresponding water conservancy diversion lock-on connection of drive block dovetail groove joint dovetail groove is radially arranged; The spool that at least two abilities also can move radially the flow channels sealing is installed in the bottom of valve seat; The upper end and the outside of the spool corresponding with joint dovetail groove and drive block dovetail groove are dovetail shaped respectively, and the upper end of spool and the outside are installed in respectively in joint dovetail groove and the drive block dovetail groove; The spool groove that is wide at the top and narrow at the bottom is arranged at the center of spool.
Be to the further optimization of above-mentioned utility model technical scheme below or/and improve:
Three drive blocks that can move up and down can be arranged on the above-mentioned valve seat; The drive block dovetail groove that three circumference uniform distributions are arranged respectively on the inwall of drive block; With the lower end of the corresponding water conservancy diversion lock-on connection of drive block dovetail groove three joint dovetail grooves are radially arranged, three spools are installed in the bottom of valve seat.
Can there be screw thread in the outside of above-mentioned valve seat outer lug boss, and valve seat outer lug boss and cylindrical shell are fixed together through screw thread.
The inside upper part of above-mentioned water conservancy diversion lock-on connection can be arc wide at the top and narrow at the bottom.
The upper outside of above-mentioned water conservancy diversion lock-on connection can have screw thread, and water conservancy diversion lock-on connection and cylindrical shell are fixed together through screw thread.
The upside of above-mentioned barrel and downside can have screw thread respectively.
The utility model reasonable and compact in structure, easy to use; Through washing away of drilling fluid spool is launched automatically, through the compression spring spool is closed automatically simultaneously; Can under various situation such as liquid state or gaseous fluid, be suitable for, therefore not only reduce cost, versatility is improved, and has also reduced potential safety hazard.
Description of drawings
Accompanying drawing 1 partly cuts open structural representation for the master of the utility model most preferred embodiment when spool is closed looks.
Accompanying drawing 2 is that the A-A of accompanying drawing 1 is to the sectional structure sketch map.
Accompanying drawing 3 partly cuts open structural representation for the master of the utility model when spool is opened looks.
Accompanying drawing 4 is that the B-B of accompanying drawing 3 is to the sectional structure sketch map.
Coding in the accompanying drawing is respectively: 1 is cylindrical shell, and 2 is the cylindrical shell inner convex platform, and 3 is valve seat, and 4 is the valve seat outer lug boss; 5 is pod apertures, and 6 is cavity, and 7 are the compression spring, and 8 is drive block; 9 is the drive block dovetail groove, and 10 is the water conservancy diversion lock-on connection, and 11 is flow channels; 12 is the joint dovetail groove, and 13 is spool, 14 spool grooves.
The specific embodiment
The utility model does not receive the restriction of following embodiment, can confirm concrete embodiment according to the technical scheme and the actual conditions of the utility model.
In the utility model; For the ease of describing; The description of the relative position relation of each parts all is to describe according to the Butut mode of Figure of description, as: the position relation of upper and lower, left and right etc. is what to confirm according to the Butut direction of Figure of description.
Below in conjunction with embodiment and accompanying drawing the utility model is further described:
Like accompanying drawing 1,2,3, shown in 4, this abnormal shape flap valve comprises cylindrical shell 1, valve seat 3, compression spring 7, drive block 8, water conservancy diversion lock-on connection 10 and spool 13; Valve seat 3 is tubular, is fixed with cylindrical shell inner convex platform 2 in the lower inside of cylindrical shell 1, and the lower outside of valve seat 3 is fixed with valve seat outer lug boss 4; Valve seat outer lug boss 4 is fixedly mounted on the cylindrical shell inner convex platform 2; Between valve seat 3, valve seat outer lug boss 4 and cylindrical shell 1, form the cavity 6 of annular, compression spring 7 is installed in cavity 6 and is sleeved on the valve seat 3; At least two drive blocks that can move up and down 8 are arranged above valve seat 3, and the lower end of drive block 8 contacts in cavity 6 and with the top of compression spring 7; The inboard of drive block 8 is taper wide at the top and narrow at the bottom; Drive block dovetail groove 9 is from top to bottom arranged respectively on the inwall of each drive block 8; Be fixedly connected with water conservancy diversion lock-on connection 10 on the cylindrical shell 1 of drive block 8 tops; There is flow channels 11 inside of water conservancy diversion lock-on connection 10, and the outside, bottom of water conservancy diversion lock-on connection 10 is taper wide at the top and narrow at the bottom and matches with the inboard of drive block 8; With the lower end of drive block dovetail groove 9 corresponding water conservancy diversion lock-on connections 10 joint dovetail groove 12 is radially arranged; The spool 13 that at least two abilities also can move radially flow channels 11 sealings is installed in the bottom of valve seat 3; The upper end and the outside of the spool 13 corresponding with joint dovetail groove 12 and drive block dovetail groove 9 are dovetail shaped respectively, and the upper end of spool 13 and the outside are installed in respectively in joint dovetail groove 12 and the drive block dovetail groove 9; The spool groove 14 that is wide at the top and narrow at the bottom is arranged at the center of spool 13.
Can according to actual needs above-mentioned special-shaped flap valve be done further to optimize or/and improve:
Like accompanying drawing 2, shown in 4; Three drive blocks that can move up and down 8 are arranged above valve seat 3; The drive block dovetail groove 9 that three circumference uniform distributions are arranged respectively on the inwall of drive block 8; With the lower end of drive block dovetail groove 9 corresponding water conservancy diversion lock-on connections 10 three joint dovetail grooves 12 are radially arranged, three spools 13 are installed in the bottom of valve seat 3; Carry out spacingly through drive block dovetail groove 9 and 12 pairs of spools of joint dovetail groove 13, spool 13 sideslips can not occur or seal phenomenon not in place, three spools 13 are stressed has simultaneously evenly reduced contact area each other again, makes sealing effectiveness better.
Like accompanying drawing 1, shown in 3, there is screw thread in the outside of valve seat outer lug boss 4, and valve seat outer lug boss 4 and cylindrical shell 1 are fixed together through screw thread; Be convenient to dismounting to valve seat 3.
Like accompanying drawing 1, shown in 3, the inside upper part of water conservancy diversion lock-on connection 10 is arc wide at the top and narrow at the bottom; Drilling fluid is passed through from flow channels 11 faster, increase the scouring intensity of drilling fluid spool 13.
Like accompanying drawing 1, shown in 3, the upper outside of water conservancy diversion lock-on connection 10 has screw thread, and water conservancy diversion lock-on connection 10 and cylindrical shell 1 are fixed together through screw thread; Be convenient to dismounting like this to water conservancy diversion lock-on connection 10.
Like accompanying drawing 1, shown in 3, cylindrical shell 1 inner upside and downside has screw thread respectively; Being convenient to the utility model like this is connected with other devices.
Above technical characterictic has constituted the most preferred embodiment of the utility model, and it has stronger compliance and best implementation result, can increase and decrease non-essential technical characterictic according to actual needs, satisfies the demand of different situations.
The use of the utility model most preferred embodiment: when drilling fluid enters into the utility model inside; Drilling fluid washes away spool groove 14; Because spool groove 14 is a back taper; Drilling fluid has component radially that spool 13 is outwards moved to spool 13, and the outside of spool 13 makes drive block 8 move straight down in drive block dovetail groove 9, and makes 7 compressions of compression spring; Thereby flow channels 11 is communicated with the inside of valve seat 3, and drilling fluid can pass through the utility model; When drilling fluid stopped, drive block 8 moved radially spool 13 through drive block dovetail groove 9 and joint dovetail groove 12, thereby spool 13 is closed because the effect of compression spring 7 sets back; Promptly reaching the high pressure liquid air-flow that prevents in the drilling fluid refluxes or ejection in drill string.
Claims (10)
1. a special-shaped flap valve is characterized in that comprising cylindrical shell, valve seat, compression spring, drive block, water conservancy diversion lock-on connection and spool; Valve seat is tubular, is fixed with the cylindrical shell inner convex platform in the lower inside of cylindrical shell, and the lower outside of valve seat is fixed with the valve seat outer lug boss; The valve seat outer lug boss is fixedly mounted on the cylindrical shell inner convex platform; Between valve seat, valve seat outer lug boss and cylindrical shell, form the cavity of annular, the compression spring is installed in cavity and is sleeved on the valve seat; At least two drive blocks that can move up and down are arranged above valve seat, and the lower end of drive block contacts in cavity and with the top of compression spring; The inboard of drive block is taper wide at the top and narrow at the bottom; Drive block dovetail groove is from top to bottom arranged respectively on the inwall of each drive block; Be fixedly connected with the water conservancy diversion lock-on connection on the cylindrical shell of drive block top; There is flow channels the inside of water conservancy diversion lock-on connection, and the outside, bottom of water conservancy diversion lock-on connection is taper wide at the top and narrow at the bottom and matches with the inboard of drive block; With the lower end of the corresponding water conservancy diversion lock-on connection of drive block dovetail groove joint dovetail groove is radially arranged; The spool that at least two abilities also can move radially the flow channels sealing is installed in the bottom of valve seat; The upper end and the outside of the spool corresponding with joint dovetail groove and drive block dovetail groove are dovetail shaped respectively, and the upper end of spool and the outside are installed in respectively in joint dovetail groove and the drive block dovetail groove; The spool groove that is wide at the top and narrow at the bottom is arranged at the center of spool.
2. special-shaped flap valve according to claim 1; There are three drive blocks that can move up and down the top that it is characterized in that valve seat; The drive block dovetail groove that three circumference uniform distributions are arranged respectively on the inwall of drive block; With the lower end of the corresponding water conservancy diversion lock-on connection of drive block dovetail groove three joint dovetail grooves are radially arranged, three spools are installed in the bottom of valve seat.
3. special-shaped flap valve according to claim 1 and 2 is characterized in that there is screw thread in the outside of valve seat outer lug boss, and valve seat outer lug boss and cylindrical shell are fixed together through screw thread.
4. special-shaped flap valve according to claim 1 and 2 is characterized in that the inside upper part of water conservancy diversion lock-on connection is arc wide at the top and narrow at the bottom.
5. special-shaped flap valve according to claim 3 is characterized in that the inside upper part of water conservancy diversion lock-on connection is arc wide at the top and narrow at the bottom.
6. special-shaped flap valve according to claim 1 and 2 is characterized in that the upper outside of water conservancy diversion lock-on connection has screw thread, and water conservancy diversion lock-on connection and cylindrical shell are fixed together through screw thread.
7. special-shaped flap valve according to claim 3 is characterized in that the upper outside of water conservancy diversion lock-on connection has screw thread, and water conservancy diversion lock-on connection and cylindrical shell are fixed together through screw thread.
8. special-shaped flap valve according to claim 5 is characterized in that the upper outside of water conservancy diversion lock-on connection has screw thread, and water conservancy diversion lock-on connection and cylindrical shell are fixed together through screw thread.
9. special-shaped flap valve according to claim 1 and 2 is characterized in that the upside of barrel and downside have screw thread respectively.
10. special-shaped flap valve according to claim 8 is characterized in that the upside of barrel and downside have screw thread respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202061124U CN202100234U (en) | 2011-06-19 | 2011-06-19 | Irregular-shaped check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202061124U CN202100234U (en) | 2011-06-19 | 2011-06-19 | Irregular-shaped check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202100234U true CN202100234U (en) | 2012-01-04 |
Family
ID=45386250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202061124U Expired - Fee Related CN202100234U (en) | 2011-06-19 | 2011-06-19 | Irregular-shaped check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202100234U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953313A (en) * | 2014-05-14 | 2014-07-30 | 中国石油集团渤海钻探工程有限公司 | Erosion-resistant check valve |
| CN104563945A (en) * | 2013-10-21 | 2015-04-29 | 韩成才 | Rod-type pump pipe column bottom plugging device in oil well operation under pressure |
-
2011
- 2011-06-19 CN CN2011202061124U patent/CN202100234U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104563945A (en) * | 2013-10-21 | 2015-04-29 | 韩成才 | Rod-type pump pipe column bottom plugging device in oil well operation under pressure |
| CN104563945B (en) * | 2013-10-21 | 2017-07-07 | 西安石油大学 | Oil well operation under pressure insert pump tubing string bottom blocking device |
| CN103953313A (en) * | 2014-05-14 | 2014-07-30 | 中国石油集团渤海钻探工程有限公司 | Erosion-resistant check valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120104 Termination date: 20160619 |