CN204402425U - A kind of for well-control blowout prevention instrument during setting of casing - Google Patents
A kind of for well-control blowout prevention instrument during setting of casing Download PDFInfo
- Publication number
- CN204402425U CN204402425U CN201420804739.3U CN201420804739U CN204402425U CN 204402425 U CN204402425 U CN 204402425U CN 201420804739 U CN201420804739 U CN 201420804739U CN 204402425 U CN204402425 U CN 204402425U
- Authority
- CN
- China
- Prior art keywords
- well
- casing
- ball valve
- spring
- blowout prevention
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a kind of for well-control blowout prevention instrument during setting of casing, its scheme is: establish water passage in body, is provided with moveable ball valve and spring in body, and ball valve is connected on spring, spring is fixed on body lower part, and ball valve and body upper part form and be sealed and matched.The major advantage of this well-control blowout prevention instrument: one is can connect drilling rod and sleeve pipe rapidly, is transferred by drilling rod to ram block position, then closing well, realizes rapidly the control to well head; Two is under the precondition of well control permission, the operation of running against pressure bar.The utility model structure is simple, easy to use, with low cost, practical.
Description
Technical field
The utility model belongs to oil and gas boring tool field, the well-control blowout prevention instrument specifically in Oil/gas Well casing job process.
Background technology
In oil gas drilling process, formation fluid enters in pit shaft and forms overflow, once overflow is out of hand, will cause blowout or blowout out of control, its consequence is catastrophic.Overflow in most cases occurs in drilling process, also overflow can occur, be unfavorable for job safety in casing job.For preventing overflow in casing job process out of control, current common practices changes the ram block fuse adapted with casing size before being setting of casing, and this method wastes time and energy, and changes inconvenient, uneconomical; And once after overflow closing well, can not casing job by force be carried out, be unfavorable for kill job, make down-hole situation complicated.
Summary of the invention
The object of this utility model is to meet well-control blowout prevention needs in casing job, provides a kind of for well-control blowout prevention instrument during setting of casing.
The technical solution of the utility model is:
For well-control blowout prevention instrument during setting of casing, establish water passage in body, be provided with moveable ball valve and spring in body, ball valve is connected on spring, and spring is fixed on body lower part, and ball valve and body upper part form and be sealed and matched.
Such scheme also comprises: water passage 5 stage casing in body 2 is extension diameter section, and ball valve 3 is arranged in this extension diameter section.Body 2 two ends are provided with connecting thread button, and body 2 upper end is box 1, and lower end is pin thread 6, are API normal sleeve screw thread.
Well-control blowout prevention instrument during setting of casing of the present utility model has the following advantages:
1 once find overflow, will be connected with drilling rod of the present utility model and well inner sleeve and be linked closely by screw thread and be connected, and be transferred by drilling rod to ram block position, then closing well, can realize rapidly, to well head control, can meeting setting of casing well control demand.
2, at present conventional casing job well control method, can not casing job by force after closing well, is unfavorable for kill job.Use the utility model, in casing job well control, after closing well, according to circumstances, the operation of running against pressure bar can be carried out, be more conducive to kill job, prevent blowout.
3, before casing job, do not need to change the ram block fuse adapted with casing size, only the utility model and a drilling rod need be linked closely by screw thread is connected, and is placed in rig floor greatly for subsequent use in front of the door, time saving and energy saving.
4, the utility model structure simple, easy to use, with low cost, can be recycled, practical.
accompanying drawing illustrates:
Fig. 1 is a kind of for well-control blowout prevention tool construction schematic diagram during setting of casing.
In figure: 1. box, 2. body, 3. ball valve, 4. spring, 5. water passage, 6. pin thread.
Detailed description of the invention
With reference to accompanying drawing 1, well-control blowout prevention instrument during setting of casing is made up of body 2, water passage 5, box 1, ball valve 3, spring 4, pin thread 6, and water passage 5 runs through the inside of body 2, and there is box 1 inside, upper end of body 2, the button-type of box 1 is consistent with drilling rod box, directly and drilling rod can link and connect; There is pin thread 6 outside, lower end of body 2, and the button-type of pin thread 6 is consistent with sleeve pipe pin thread, directly and sleeve pipe can link and connect.The mid portion of water passage 5 is slightly wide, spring 4 and ball valve 3 are housed, ball valve 3 is withstood on the top of the mid portion of water passage 5 under the elastic force effect of spring 4, salablely block water passage 5, namely water passage 5 is closed, when the top of water passage 5 has pressure effect ball valve 3, spring 4 compresses, ball valve 3 is descending, can open water passage 5.
Before casing job, do not need to change ram block fuse, box 1 of the present utility model is linked closely with the pin thread of a drilling rod and is connected, be placed in rig floor large for subsequent use in front of the door, in setting of casing process, once find overflow, drilling rod of the present utility model will be connected with and rise and winch to rig floor, linked by pin thread 6 of the present utility model and cannula carrier fastening and connect, drilling rod is transferred to ram block position, then closing well, after closing well, flashboard blocks drilling rod, seals the annular space between sleeve pipe and well; In sleeve pipe, ball valve 3 is under the effect of spring 4, blocks water passage 5, and effectively stop spray in sleeve pipe, well kick is just controlled.Connect kelly bar in drilling rod upper end or top is driven, after turn on pump, under mud pressure effect, spring 4 compresses, ball valve 3 is descending, opens water passage 5, carries out kill job.In order to be beneficial to kill job, according to circumstances, the operation of running against pressure bar can be carried out.Due to tool joint step, place is ramped shaped, when being provided with universal blowout preventer, can carry out the operation of running against pressure bar, enter drilling rod under as much as possible, drilling rod is column, and running speed is fast, then kelly bar is connected in drilling rod upper end or top is driven, after turn on pump, in implementation kill job.
Claims (3)
1. one kind for well-control blowout prevention instrument during setting of casing, it is characterized in that: in body (2), establish water passage (5), moveable ball valve (3) and spring (4) is provided with in body (2), described ball valve (3) is connected on spring (4), spring (4) is fixed on body (2) bottom, and ball valve (3) and body (2) top form and is sealed and matched.
2. according to claim 1 for well-control blowout prevention instrument during setting of casing, it is characterized in that: body (2) two ends are provided with connecting thread button; Water passage (5) stage casing in body (2) is extension diameter section, and ball valve (3) is arranged in this extension diameter section.
3. according to claim 1 and 2 for well-control blowout prevention instrument during setting of casing, it is characterized in that: body (2) upper end is box (1), and lower end is pin thread (6), is API normal sleeve screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420804739.3U CN204402425U (en) | 2014-12-19 | 2014-12-19 | A kind of for well-control blowout prevention instrument during setting of casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420804739.3U CN204402425U (en) | 2014-12-19 | 2014-12-19 | A kind of for well-control blowout prevention instrument during setting of casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204402425U true CN204402425U (en) | 2015-06-17 |
Family
ID=53426298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420804739.3U Expired - Fee Related CN204402425U (en) | 2014-12-19 | 2014-12-19 | A kind of for well-control blowout prevention instrument during setting of casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204402425U (en) |
-
2014
- 2014-12-19 CN CN201420804739.3U patent/CN204402425U/en not_active Expired - Fee Related
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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 |
Granted publication date: 20150617 Termination date: 20201219 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |