CN201250640Y - Shaft anti-blowout and anti-overflow unit for workover - Google Patents
Shaft anti-blowout and anti-overflow unit for workover Download PDFInfo
- Publication number
- CN201250640Y CN201250640Y CNU2008200145585U CN200820014558U CN201250640Y CN 201250640 Y CN201250640 Y CN 201250640Y CN U2008200145585 U CNU2008200145585 U CN U2008200145585U CN 200820014558 U CN200820014558 U CN 200820014558U CN 201250640 Y CN201250640 Y CN 201250640Y
- Authority
- CN
- China
- Prior art keywords
- ball seat
- pin
- ball
- spring
- support spring
- 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 an anti-blowout and anti-overflow unit for workover, which comprises an upper iron shot, a lower iron shot, a seal nipple, a ball seat seal ring, a ball seat, an inner pin, an inner pin spring, a ball sealer support spring, an outer pin, a pin O-ring seal and a main working barrel. The ball sealer support spring is arranged inside the main working barrel. The lower shot is arranged above the ball sealer support spring; the ball seat is arranged above the main working barrel; the ball seat and the main working barrel are fixedly connected through an outer pin; the pin O-ring seal is enclosed on the outer pin; the ball seat seal ring is arranged above the ball seat; the inner pin penetrates through the outer round face of the upper part of the ball seat; the inner pin spring is arranged on the inner pin; the seal nipple is enclosed outside the ball seat, and the lower end of the seal nipple is connected with the upper end of the main working barrel; the upper iron shot is arranged above the ball seat. The unit is novel in structure, operated conveniently and works reliably. Overflow, blowout and environmental pollution can be effectively prevented; workover can be ensured to proceed without failure; the number of round trips of the string can be reduced; and the construction cost is saved.
Description
Technical field:
The utility model relates to a kind of down-hole blowout prevention safety device that is used for oil exploration, formation testing, workover operation construction, belongs to oil recovery downhole tool class.
Background technology:
In oil exploration, workover operation construction process, need carry out a large amount of drilling tools continually, oil pipe removes work.In order to guarantee that drilling tool or oil pipe remove the safety of operation, prevent blowout or oil gas overflow, need to use blowout hookup.At present, the blowout hookup of field by using is provided with usually and is installed in well head, in work progress, if when running into the interior gas blowby of well or overflow being arranged, must trip out or put down the interior single back of well uses cock or full envelope that it is sealed, just can carry out further work after replacing the degassing of well killing fluid or well-flushing again, thereby influence normally carrying out of well construction.
The utility model content:
The purpose of this utility model is to provide a kind of workover rig service to oil well pit shaft blowout prevention anti-overflow device that not only can cooperate the well head self-packer effectively to prevent the overflow blowout but also construction is normally carried out.
For achieving the above object, the utility model is achieved in that this kind blowout prevention anti-overflow device is made up of upper and lower steel ball, packoff nipple head, ball seat sealing ring, ball seat, interior pin, sold inside the country langrage spring, ball sealer support spring, outer pin, pin O-ring seal, body of work tube, spring base in the body of work tube is provided with the ball sealer support spring, and the support spring top is provided with down steel ball; Body of work tube top is provided with ball seat, penetrates by outer pin between the two that outer pin hole with matching is connected to a fixed on circumferentially uniform pin hole of body of work tube upper end edge and the ball seat, and export trade nails on and is set with the pin O-ring seal; Ball seat top is provided with the ball seat sealing ring, penetrates interior pin in the uniform interior pin hole on the periphery of ball seat top, which is provided with sold inside the country langrage spring; The packoff nipple headgear is contained in the ball seat outside, and its lower end is connected with body of work tube upper end with screw thread, and the ball seat top is provided with steel ball.During the workover rig service to oil well construction, this device is connected oil pipe or drilling rod bottom G.I.H desired depth.Be lowered in the process at oil pipe or drill string, the passage in the device is by steel ball and the sealing of ball seat bottom face down, and gas, liquid that can not in the well spray and spoil over out in oil pipe or drilling rod; After construction was finished, beam hanger or drilling rod space were lived in following steel ball return and packing under the active force of spring, thereby gas, liquid in the well can not spray and spoil over out in oil pipe or drilling rod yet.Anti-flushing well then drops into and goes up steel ball if desired, just suppresses, and cuts off outer pin, and interior pin reaches assigned address and is ejected into interior pin hole pinning ball seat, and gas, liquid are communicated with from the gap of ball seat and body of work tube, can carry out positive and negative well-flushing or kill-job.
The utility model is reasonable in design, and novel structure is easy to operate, reliable operation, utilize it can effectively prevent overflow blowout and environment pollution, guarantee normally carrying out of workover rig service to oil well, and can be used other instruments, reduce tubing string and remove number of times, shorten construction period, save construction cost.
Description of drawings:
Accompanying drawing is a structural representation of the present utility model.
The specific embodiment:
As shown in the figure, the utility model is made up of last steel ball 1, packoff nipple head 2, ball sealing ring 3, ball seat 4, sold inside the country langrage spring 5, interior pin 6, following steel ball 7, ball sealer support spring 8, outer pin 10, pin O-ring seal 9, body of work tube 11, its relation of assembling is as follows: the spring base in the body of work tube 11 is provided with ball sealer support spring 8, and support spring 8 tops are provided with down steel ball 7; Body of work tube 11 tops are provided with ball seat 4, penetrate by outer pin 10 between the two that outer pin hole with matching is connected to a fixed on circumferentially uniform pin hole of body of work tube 11 upper end edges and the ball seat 4, and outer pin is set with pin O-ring seal 9 on 10 holes; Ball seat 4 tops are provided with ball seat sealing ring 3, and pin 6 in penetrating in the uniform interior pin hole on the ball seat 4 top peripheries which is provided with sold inside the country langrage spring 5; Packoff nipple head 2 is sleeved on ball seat 4 outsides, and its lower end is connected with body of work tube 11 upper ends with screw thread, and ball seat 4 tops are provided with steel ball 1.Wherein, the thickening of packoff nipple head 2 bottoms, upper and lower side is respectively equipped with oil pipe box 2.1 and oil pipe pin thread 2.2, and ball seat 4 is the hollow circular cylinder that an outer surface of upper is provided with round platform, its end face is provided with guide slot 4.1, is evenly equipped with outer pin hole 4.2 and interior pin hole 4.3 on the round platform periphery of top respectively.Interior pin 6, outer pin 10 all adopt copper pin.Body of work tube 11 is a cylinder, its upper and lower side is respectively equipped with oil pipe box 11.1 and oil pipe pin thread 11.6, pin hole 11.4 and outer pin hole 11.2 in being evenly equipped with on the inside and outside wall in top, inwall both sides are provided with relatively and are used for the lead 11.3 and the spring base 11.5 that match with guide slot 4.1 on the ball seat 4.
Claims (1)
1. workover rig service to oil well pit shaft blowout prevention anti-overflow device, form by last steel ball (1), packoff nipple head (2), ball seat sealing ring (3), ball seat (4), sold inside the country langrage spring (5), interior pin (6), following steel ball (7), ball sealer support spring (8), outer pin (10), pin O-ring seal (9), body of work tube (11), it is characterized in that, spring base in the body of work tube (11) is provided with ball sealer support spring (8), and support spring (8) top is provided with down steel ball (7); Body of work tube (11) top is provided with ball seat (4), penetrate the circumferentially uniform pin hole of body of work tube (11) upper end edge and ball seat (4) by outer pin (10) between the two and go up outer pin hole with matching and be connected to a fixed, outer pin (10) is set with pin O-ring seal (9) on the hole; Ball seat (4) top is provided with ball seat sealing ring (3), penetrates interior pin (6) in the uniform interior pin hole on the periphery of ball seat (4) top, which is provided with sold inside the country langrage spring (5); Packoff nipple head (2) is sleeved on ball seat (4) outside, and its lower end is connected with body of work tube (11) upper end with screw thread, and ball seat (4) top is provided with steel ball (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200145585U CN201250640Y (en) | 2008-08-01 | 2008-08-01 | Shaft anti-blowout and anti-overflow unit for workover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200145585U CN201250640Y (en) | 2008-08-01 | 2008-08-01 | Shaft anti-blowout and anti-overflow unit for workover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201250640Y true CN201250640Y (en) | 2009-06-03 |
Family
ID=40746314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200145585U Expired - Fee Related CN201250640Y (en) | 2008-08-01 | 2008-08-01 | Shaft anti-blowout and anti-overflow unit for workover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201250640Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109488252A (en) * | 2019-01-21 | 2019-03-19 | 松原迈维自动化设备有限责任公司 | A kind of environment-friendly type seepage prevention control device |
-
2008
- 2008-08-01 CN CNU2008200145585U patent/CN201250640Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109488252A (en) * | 2019-01-21 | 2019-03-19 | 松原迈维自动化设备有限责任公司 | A kind of environment-friendly type seepage prevention control device |
| CN109488252B (en) * | 2019-01-21 | 2023-08-22 | 松原迈维自动化设备有限责任公司 | Environment-friendly anti-overflow liquid controlling means |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090603 |