CN204252896U - Pressure control switch and hydraulic casing shaper - Google Patents
Pressure control switch and hydraulic casing shaper Download PDFInfo
- Publication number
- CN204252896U CN204252896U CN201420620480.7U CN201420620480U CN204252896U CN 204252896 U CN204252896 U CN 204252896U CN 201420620480 U CN201420620480 U CN 201420620480U CN 204252896 U CN204252896 U CN 204252896U
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- China
- Prior art keywords
- valve body
- control switch
- pressure control
- valve
- slide body
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- Expired - Fee Related
Links
- 230000007246 mechanism Effects 0.000 claims abstract description 6
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 13
- 238000007789 sealing Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 239000003129 oil well Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 210000002445 nipple Anatomy 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Safety Valves (AREA)
Abstract
The utility model discloses a pressure control switch and hydraulic pressure sleeve pipe shaper. Wherein the pressure control switch includes: slide body, valve module, right pole and stop gear. The outer wall of the sliding body is provided with a pressure relief hole; the valve body is provided with a valve component, a valve ball of the valve component can open and close an outlet end on the valve component, and the valve body is provided with a flow guide channel communicated with the outlet end and through holes for penetrating through the front end and the rear end of the valve body; one end of the righting rod is fixedly connected with the valve ball of the valve component, the other end of the righting rod penetrates through the inlet end of the valve component and is fixedly connected with the sliding body through a connecting piece, and a channel communicated with the through hole is formed in the connecting piece; the limiting mechanism can communicate the pressure relief hole with the flow guide channel when sliding relative to the valve body. The utility model has the advantages that: under the condition of ensuring the normal use of the hydraulic casing shaper, the pressure control switch of the hydraulic casing shaper is further sealed through the staggering of the relative positions of the flow guide channel of the valve body and the pressure relief hole of the sliding body.
Description
Technical field
The utility model relates to a kind of oil well casing centralising device, is specifically related to a kind of pressure control switch and hydraulic casing mandrel of hydraulic casing mandrel.
Background technology
The sleeve pipe of oil well due to the motion on stratum and workmanship factor, inevitably also exists casing deformation in long-term work process, the production thus impact is normally recovered the oil.Usually hydraulic casing mandrel is adopted to repair casing deformation position during casing deformation.Hydraulic casing mandrel is a kind of is power with hydraulic pressure, has the distortion of flattening, depression etc. to repair to oil well inner sleeve, makes sleeve pipe recovery or a kind of special tool close to normal size.Pressure control switch is then used to the vitals of the pressurization of hydraulic control casing mandrel and pressure release.
At Chinese patent ZL201120351716.8, name is called in the patent application of " a kind of combination hydraulic expanding tube reshaping prosthetic device " and proposes a kind of hydraulic casing mandrel, and it has following structure substantially: the screwed connection in turn from top to bottom of top connection, valve, strainer, pipe nipple, hydraulic anchor, joint, multistage hydraulic cylinder, pipe nipple, movable short section, roller tube expander.This hydraulic casing mandrel is operationally usual to be fetched water to drilling rod tubing string by cementing truck group and slowly pressurizes after filter filters, and makes the card tooth of the hydraulic anchor above roller tube expander expand outwardly promptly tube wall, fixing top rod; Multistage hydraulic cylinder is subject to the promotion of water under high pressure, produce downward thrust, promote roller tube expander, the cone at roller tube expander center is made outwards to promote the roller rolling expansion tube wall of cone periphery downwards, sleeve pipe is made to recover cylindrical shape, until multistage hydraulic cylinder stroke is covered, reach operation action when piston rod leans out the longest and complete; Ground cement car stops pressurization and pressure release, then slowly upper lifting pipe post, and relief valve is opened, pressure in release tubing string, and gets rid of the water in working string, for next expand tube is ready.
But the pressure control switch of this hydraulic casing mandrel adopts single valve to carry out sealing pressing and pressure release usually, therefore causes the situation of operation failure to occur carrying out may there is seal failure in casing swage pressure process.When there is this situation, operating personnel can only propose tubing string usually, again change the valve of pressure control switch or enable standby pressure gauge tap, so just have impact on the job scheduling of casing swage, the labour intensity of site operation personnel is increased, simultaneously owing to having fluid to flow on ground when proposing tubing string, environment will be given like this.
Utility model content
In order to overcome the above-mentioned defect of prior art, technical problem to be solved in the utility model is to provide a kind of pressure control switch being applied to hydraulic casing mandrel good sealing effect, enable hydraulic casing mandrel have good sealing performance when pressurizeing repairing casing distortion position, hydraulic pressure is acted on fix tool completely.
Above-mentioned purpose of the present utility model can adopt following technical proposal to realize:
A kind of pressure control switch, it is characterized in that, it comprises:
Have the slide body of inner chamber, it has along self axially extended rear and front end, and the outer wall of described slide body offers relief hole.
To be placed in described slide body and can the valve body that slides of relatively described slide body, described valve body is provided with valve module, described valve module comprises valve body and valve ball, described valve body has cavity and the arrival end be connected with described cavity respectively and the port of export, described valve ball to be placed in described cavity and can to described port of export opening and closing, described valve body offers the through hole of the flow-guiding channel that is connected with the port of export of described cavity and the rear and front end for through described valve body.
Righting rod, one end and the described valve ball of described righting rod are fixedly connected, and the other end of described righting rod is passed described cavity entrance end and is fixedly connected by connector and described slide body, described connector offers the passage be connected with described through hole.
Position-limit mechanism, it is for being connected described relief hole with described flow-guiding channel when the relatively described valve body of described slide body slides to extreme direction before described slide body.
Preferably, the rear end of described valve body is fixed with lower contact, and described lower contact has the first through hole with the intracavity inter-connection of described valve body, and described lower contact has the chute along himself being circumferentially arranged; Described slide body is provided with the slide block for sliding in described chute.
Preferably, be connected with pressure cap in described slide body rear end, described slide block is embedded in described pressure cap.
Particularly, described chute is along having the first guide part extended vertically, the second guide part diagonally extended, the 3rd guide part extended vertically, the 4th guide part diagonally extended and the 5th guide part extended vertically during himself center deployment, between described first guide part and described second guide part, be provided with the first guidance part, between described 3rd guide part and described 4th guide part, be provided with the second guidance part.
Particularly, described righting rod front end is installed with tightening piece, sheathed first centering ring on described righting rod, and described first centering ring is connected on the internal chamber wall of described slide body, described first centering ring has the first passage of its axis through.
More specifically, the valve seat that one has runner is connected at described valve rear end, a shoulder hole is offered between the flow-guiding channel of described valve body and described valve body, one end of described shoulder hole is communicated with described valve body, the other end of described shoulder hole is communicated with the flow-guiding channel on described valve body, and described valve seat is positioned at described shoulder hole.
Further, be fixedly connected with top connection in the front end of described slide body, described top connection has the second through hole with the intracavity inter-connection of described slide body.
Further, at sheathed second centering ring in described righting rod rear end, described second centering ring is fixed on described valve body, described second centering ring offers the second channel of its axis through.
Further, between described slide body and described valve body, seal is provided with.
Meanwhile, the invention also discloses a kind of hydraulic casing mandrel, it is characterized in that: comprise pressure control switch as claimed in any one of claims 1-9 wherein.
The utility model has the advantages that: when ensureing that hydraulic casing mandrel normally uses, further the pressure control switch of hydraulic casing mandrel is sealed by the flow-guiding channel of valve body and the staggering of relief hole relative position of slide body.The problem of the seal failure that conventional pressure gauge tap in use makes traditional pressure control switch easily occur owing to only being sealed by valve can be overcome, so decrease site operation personnel because of change seal labour intensity, reduce operating cost, improve operating efficiency.The pressure control switch of hydraulic casing mandrel of the present utility model has simple, easy to operate, the safe and reliable feature of structure.
Accompanying drawing explanation
Accompanying drawing described here only for task of explanation, and is not intended to limit the utility model scope of disclosure by any way.In addition, the shape of each parts in figure and proportional sizes etc. are only schematic, for helping understanding of the present utility model, are not the shape and the proportional sizes that specifically limit each parts of the utility model.Those skilled in the art, under instruction of the present utility model, can select various possible shape and proportional sizes to implement the utility model as the case may be.
Fig. 1 shows the structural representation of pressure control switch of the present utility model;
Fig. 2 shows the chute expanded view in the utility model lower contact.
The Reference numeral of above accompanying drawing: 1, slide body; 2, relief hole; 3, valve body; 4, valve module; 41, valve body; 42, valve ball; 5, flow-guiding channel; 6, through hole; 7, righting rod; 8, connector; 81, tightening piece; 82, the first centering ring; 83, first passage; 9, lower contact; 10, the first through hole; 11, chute; 111, the first guide part; 112, the second guide part; 113, the 3rd guide part; 114, the 4th guide part; 115, the 5th guide part; 116, the first guidance part; 117, the second guidance part; 12, slide block; 13, pressure cap; 14, valve seat; 15, shoulder hole; 16, top connection; 17, the second through hole; 18, the second centering ring; 19, second channel; 20, seal.
Detailed description of the invention
By reference to the accompanying drawings with the description of the utility model detailed description of the invention, can clearly understand details of the present utility model.But detailed description of the invention of the present utility model described here, only for explaining the purpose of this utility model, and can not to be understood as by any way be to restriction of the present utility model.Under instruction of the present utility model, technician can conceive based on distortion possible arbitrarily of the present utility model, and these all should be regarded as belonging to scope of the present utility model.
As shown in Figure 1, the utility model provides a kind of pressure control switch, and it comprises: there is the slide body 1 of inner chamber, be placed in slide body 1 in and relative sliding body 1 valve body 3, valve module 4, righting rod 7 and the position-limit mechanism that can slide.
The slide body 1 with inner chamber axially has rear and front end along self, the outer wall of slide body 1 offers relief hole 2.
To be placed in slide body 1 and the valve body 3 that relative sliding body 1 can slide is provided with valve module 4, valve module 4 comprises valve body 41 and valve ball 42, valve body 41 has cavity and the arrival end be connected with cavity respectively and the port of export, valve ball 42 to be placed in cavity and can to port of export opening and closing, valve body 3 offers the through hole 6 of the flow-guiding channel 5 that is connected with the port of export of cavity and the rear and front end for through valve body 3.
One end and the valve ball 42 of righting rod 7 are fixedly connected, and the other end of righting rod 7 is passed cavity entrance end and is fixedly connected by connector 8 and slide body 1, connector 8 offers the passage be connected with through hole 6.
Position-limit mechanism is used for being connected with flow-guiding channel 5 by relief hole 2 when relatively valve body 3 slides to extreme direction before slide body 1 in slide body 1.
Further, slide body 1 is the pipe of the cylindrical shape of a kind of cardinal principle, and valve body 3 is arranged in the inner chamber of slide body 1.Valve body 3 is provided with internal thread, and valve body 41 is provided with the external screw thread matched with the internal thread of valve body 3, and such structure makes valve body 3 ring establish the outside being fixed on valve body 41.Valve body 3 is connected further by seal 20 with slide body 1 inner chamber, can play better sealing function like this.Relief hole 2 on slide body 1 outer wall is relative with flow-guiding channel 5 position of valve body 3 or stagger, to realize conducting or the shutoff in these two holes.
Further, relief hole 2 internal circumference place has groove (not shown), or the valve body 3 exterior periphery place corresponding to relief hole 2 is also corresponding has groove (not shown).This groove structure more easily realizes relief hole 2 and the conducting of the flow-guiding channel 5 of valve body 3, with convenient working, need not often subjob all make slide body 1 get back to initial position.
One end of righting rod 7 can fix by welding or being threaded with the cental axial position of valve ball 42, and the other end of righting rod 7 integratedly can be formed with connector 8 or adopt and be threaded fixing, and connector 8 and slide body 1 connect and fix.
When needing repairing casing, the pressure control switch of hydraulic casing mandrel is transferred, now valve module 4 is closed, slide body 1 moves down, valve body 3 keeps motionless, and the relief hole 2 now on slide body 1 outer wall staggers to realize sealing to pressure control switch further with flow-guiding channel 5 position of valve body 3.Then pressurized fluid is poured into in slide body 1, and because valve module 4 is in closed condition, now pressurized fluid can only flow to orthopaedic component by the through hole 6 be arranged on valve body 3.When pressurized fluid reaches a certain amount of, the orthopaedic component that the pressure of pressurized fluid can act on hydraulic casing mandrel is repaired accordingly to sleeve pipe.
After casing repairing, pressure control switch is carried, slide body 1 moves up, drive the connector 8 be connected in slide body 1 inner chamber to move up, due to connector 8 and righting rod 7 and valve ball 42 affixed, therefore valve ball 42 moves, valve module 4 is opened, position-limit mechanism drives the relief hole 2 on slide body 1 outer wall to be communicated with the flow-guiding channel 5 of valve body 3, and then realizes pressure release deblocking, and upper lifting pipe post fulfils assignment.
The pressure control switch of hydraulic casing mandrel of the present utility model compared with prior art, when ensureing that hydraulic casing mandrel normally uses, by staggering of relief hole 2 relative position of valve body 3 flow-guiding channel 5 and slide body 1, can seal the pressure control switch of hydraulic casing mandrel further.The problem of the seal failure that conventional pressure gauge tap in use makes traditional pressure control switch easily occur owing to only being sealed by valve can be overcome.
Preferably, the rear end of valve body 3 is fixed with lower contact 9, and lower contact 9 has the first through hole 10 with the intracavity inter-connection of valve body 3, and lower contact 9 has the chute 11 along himself being circumferentially arranged; Slide body 1 is provided with the slide block 12 for sliding in chute 11.
Particularly, valve body 3 rear end is provided with internal thread, lower contact 9 is provided with the external screw thread matched with valve body 3 internal thread, first through hole 10 of lower contact 9 is connected with the through hole 6 of the through rear and front end of valve body 3 inner chamber, and pressurized fluid can be made like this to act on hydraulic shaping parts by the first through hole 10 of lower contact 9.
Further, be connected with pressure cap 13 in slide body 1 rear end, the slide block 12 in slide body 1 is embedded in pressure cap 13.Slide block 12 better can be made to be fixed in slide body 1 by the structure of pressure cap 13, move up and down with slide body 1.
Preferably, as shown in Figure 2, chute 11 in lower contact 9 is along having the first guide part 111 extended vertically, the second guide part 112 diagonally extended, the 3rd guide part 113 extended vertically, the 4th guide part 114 diagonally extended and the 5th guide part 115 extended vertically during himself center deployment, between the first guide part 111 and the second guide part 112, be provided with the first guidance part 116, between the 3rd guide part 113 and the 4th guide part 114, be provided with the second guidance part 117.
Particularly, in pressure control switch decentralization process, slide body 1 moves down, and the slide block 12 in slide body 1 slides in the chute 11 of lower contact 9, after sliding into a6 position by starting point a5, stop sliding after sliding into a7 position via the first guidance part 116 guiding.Now, relief hole in slide body 12 and the flow-guiding channel 5 on valve body 3 stagger the further sealing realized pressure control switch.When needing deblocking, on carry pressure control switch, slide body 1 moves up, slide block 12 in slide body 1 slides into a8 by a7 in the chute 11 of lower contact 9, slide via the second guidance part 117 guide function and stop behind a9 to a10 position, now, the relief hole 2 in slide body 1 is communicated with the flow-guiding channel 5 on valve body 3 the pressure release deblocking realized pressure control switch.
In like manner, plastic operation in order to next step can continue to transfer pressure control switch, the slide block 12 in slide body 1 is made to arrive a11 again through a10 to a9, then carry pressure control switch on and make slide block 12 in slide body 1 by a11 to a12 again to a13, realize the further sealing to pressure control switch, continuing to transfer pressure control switch makes slide block 12 seal pressure control switch again to a14 position, so just can carry out plastic operation next time.
The effect of a13 position is that when pressurized fluid adds a certain amount of, the pressure of pressurized fluid can make the slide body 1 of pressure control switch move upward because need to add pressurized fluid in pressure control switch transferring when hydraulic casing mandrel carries out casing swage operation.If do not arrange a13 position, slide block 12 just likely first motion make relief hole 2 and flow-guiding channel 5 conducting pressure release to the position of a10, plastic operation will be failed.A13 position prevents from reforming process, occur that slide block 12 moves to a10 position in pressure process exactly, normally can carry out plastic operation because a13 position exists.
Preferably, righting rod 7 front end is installed with tightening piece 81, and on righting rod 7, sheathed first centering ring 82, first centering ring 82 is connected on the internal chamber wall of slide body 1, the first centering ring 82 has the first passage 83 of its axis through.The structure of the first centering ring 82 can ensure righting rod 7 stress equalization, avoids damaging righting rod 7.
Preferably, connect the valve seat 14 with runner in valve body 41 rear end, offer a shoulder hole 15 between the flow-guiding channel 5 of valve body 41 and valve body 3, one end of shoulder hole 15 is communicated with valve body 41, flow-guiding channel 5 on the other end communicating valve body 3 of shoulder hole 15, valve seat 14 is positioned at shoulder hole 15.The structure of shoulder hole 15 can make valve seat 14 be fixed better, prevents valve seat 14 from rocking because of hydraulic action.
Preferably, be fixedly connected with a top connection 16 in the front end of slide body 1, top connection 16 has the second through hole 17 with the intracavity inter-connection of described slide body 1.Slide body 1 front inner wall can be provided with internal thread, top connection 16 outer wall arranges the external screw thread corresponding with slide body 1 internal thread.Natch, slide body 1 is provided with external screw thread, and it is also feasible that top connection 16 is provided with the internal thread corresponding with external screw thread in slide body 1.
Preferably, in righting rod 7 rear end, sheathed second centering ring 18, second centering ring 18 is fixed on valve body 41, the second centering ring 18 offers the second channel 19 of its axis through.The structure of the second centering ring 18 can ensure righting rod 7 stress equalization further, avoids damaging righting rod 7.
Pressure control switch specific works principle of the present utility model and use procedure as follows:
When needing repairing casing, operating personnel transfer hydraulic casing mandrel, the position making it transfer to oil well casing to need shaping, then the slide body 1 of the pressure control switch of hydraulic casing mandrel is moved down, now the valve module 4 of hydraulic casing mandrel is owing to closing under the drive of righting rod 7, slide body 1 is moving down in process simultaneously, the slide block 12 in slide body 1 is driven to slide in the chute 11 of lower contact 9, utilize the guide function of this slide block 12 and chute 11 structure, relief hole 2 on slide body 1 outer wall staggers to realize sealing to pressure control switch further with flow-guiding channel 5 position on valve body 3.Then pressurized fluid is poured into in slide body 1, when pressurized fluid reaches a certain amount of, the orthopaedic component that the pressure of pressurized fluid can act on hydraulic casing mandrel is repaired accordingly to sleeve pipe.
After casing shaping, on carry pressure control switch slide body 1 relief hole 2 on slide body 1 outer wall is communicated with the flow-guiding channel 5 of valve body 3, now drive righting rod 7 and valve ball 42 move up by connector 8, valve module 4 is opened, and pressurized fluid is flowed out with the flow-guiding channel 5 of valve body 3 by the relief hole 2 on valve module 4 and slide body 1 outer wall.
Pressure control switch of the present utility model, by staggering at the flow-guiding channel 5 of valve body 3 and relief hole 2 relative position of slide body 1, can seal the pressure control switch of hydraulic casing mandrel further and repair better sleeve pipe.
Meanwhile, the utility model additionally provides a kind of hydraulic casing mandrel, and it comprises any one of pressure control switch of the present utility model.
Above-described embodiment, only for technical conceive of the present utility model and feature are described, its object is to person skilled in the art can be understood content of the present utility model and implement according to this, can not limit protection domain of the present utility model with this.All equivalences done according to the utility model Spirit Essence change or modify, and all should be encompassed within protection domain of the present utility model.
Claims (10)
1. a pressure control switch, is characterized in that, it comprises:
Have the slide body of inner chamber, it has along self axially extended rear and front end, and the outer wall of described slide body offers relief hole;
To be placed in described slide body and can the valve body that slides of relatively described slide body, described valve body is provided with valve module, described valve module comprises valve body and valve ball, described valve body has cavity and the arrival end be connected with described cavity respectively and the port of export, described valve ball to be placed in described cavity and can to described port of export opening and closing, described valve body offers the through hole of the flow-guiding channel that is connected with the port of export of described cavity and the rear and front end for through described valve body;
Righting rod, one end and the described valve ball of described righting rod are fixedly connected, and the other end of described righting rod is passed described cavity entrance end and is fixedly connected by connector and described slide body, described connector offers the passage be connected with described through hole;
Position-limit mechanism, it is for being connected described relief hole with described flow-guiding channel when the relatively described valve body of described slide body slides to extreme direction before described slide body.
2. pressure control switch according to claim 1, it is characterized in that: the rear end of described valve body is fixed with lower contact, described lower contact has the first through hole with the intracavity inter-connection of described valve body, and described lower contact has the chute along himself being circumferentially arranged; Described slide body is provided with the slide block for sliding in described chute.
3. pressure control switch according to claim 2, is characterized in that: be connected with pressure cap in described slide body rear end, described slide block is embedded in described pressure cap.
4. the pressure control switch according to Claims 2 or 3, it is characterized in that: described chute is along having the first guide part extended vertically, the second guide part diagonally extended, the 3rd guide part extended vertically, the 4th guide part diagonally extended and the 5th guide part extended vertically during himself center deployment, between described first guide part and described second guide part, be provided with the first guidance part, between described 3rd guide part and described 4th guide part, be provided with the second guidance part.
5. pressure control switch according to claim 1, it is characterized in that: described righting rod front end is installed with tightening piece, sheathed first centering ring on described righting rod, described first centering ring is connected on the internal chamber wall of described slide body, described first centering ring has the first passage of its axis through.
6. pressure control switch according to claim 1, it is characterized in that: connect at described valve rear end the valve seat that has runner, a shoulder hole is offered between the flow-guiding channel of described valve body and described valve body, one end of described shoulder hole is communicated with described valve body, the other end of described shoulder hole is communicated with the flow-guiding channel on described valve body, and described valve seat is positioned at described shoulder hole.
7. the pressure control switch according to any one of claim 1-3, is characterized in that: be fixedly connected with top connection in the front end of described slide body, and described top connection has the second through hole with the intracavity inter-connection of described slide body.
8. pressure control switch according to claim 1, is characterized in that: at sheathed second centering ring in described righting rod rear end, described second centering ring is fixed on described valve body, described second centering ring offers the second channel of its axis through.
9. pressure control switch according to claim 1, is characterized in that: between described slide body and described valve body, be provided with seal.
10. a hydraulic casing mandrel, is characterized in that: comprise pressure control switch as claimed in any one of claims 1-9 wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420620480.7U CN204252896U (en) | 2014-10-24 | 2014-10-24 | Pressure control switch and hydraulic casing shaper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420620480.7U CN204252896U (en) | 2014-10-24 | 2014-10-24 | Pressure control switch and hydraulic casing shaper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204252896U true CN204252896U (en) | 2015-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420620480.7U Expired - Fee Related CN204252896U (en) | 2014-10-24 | 2014-10-24 | Pressure control switch and hydraulic casing shaper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204252896U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116624117A (en) * | 2023-07-19 | 2023-08-22 | 西南石油大学 | Self-control radial circulation type oil-gas well casing shaping tool and method |
-
2014
- 2014-10-24 CN CN201420620480.7U patent/CN204252896U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116624117A (en) * | 2023-07-19 | 2023-08-22 | 西南石油大学 | Self-control radial circulation type oil-gas well casing shaping tool and method |
| CN116624117B (en) * | 2023-07-19 | 2023-09-26 | 西南石油大学 | Self-control radial circulation type oil-gas well casing shaping tool and method |
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| 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: 20150408 |