CN207033396U - A kind of normal circulation downhole preventer combination of self-opening type - Google Patents
A kind of normal circulation downhole preventer combination of self-opening type Download PDFInfo
- Publication number
- CN207033396U CN207033396U CN201720897926.4U CN201720897926U CN207033396U CN 207033396 U CN207033396 U CN 207033396U CN 201720897926 U CN201720897926 U CN 201720897926U CN 207033396 U CN207033396 U CN 207033396U
- Authority
- CN
- China
- Prior art keywords
- preventer
- ladle body
- packer
- hydrogen sulfide
- telescopic
- 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 discloses a kind of normal circulation downhole preventer combination of self-opening type, including preventer ladle body, preventer ladle body is located on drill bit, sprained provided with pit shaft and press check valve in preventer ladle body bottom, preventer ladle body bottom is provided with hydrogen sulfide detector, it is closed between the borehole wall in the middle part of preventer ladle body to be filled with telescopic packer, packer is additionally provided with the middle part of preventer ladle body to sprain pressure check valve, preventer ladle body top is provided with by-passing valve, preventer ladle body top is provided with upper bearing (metal), preventer ladle body bottom is provided with lower bearing, upper bearing (metal) plays fixation with lower bearing and telescopic packer is fixed on into drill bit top.The beneficial effects of the utility model are to find hydrogen sulfide gas overflow early in drilling process, and take corresponding measure, effectively control vulcanization Hydrogen spillover.
Description
Technical field
The utility model belongs to oil-gas well engineering technical field, is related to a kind of normal circulation downhole preventer combination of self-opening type.
Background technology
In drilling process, acid oil layer, the various fluids (including underground water) containing sulfate reducing bacteria are run into, and
When drilling fluid thermally decomposes, may all there is toxic and harmful gas especially hydrogen sulfide gas to discharge, the hydrogen sulfide of overflow is made to drilling well
The safety of industry causes serious threat, once blowout occurs, will result in the hair of the major accidents such as personnel's poisoning, fire explosion
It is raw, seriously endanger the safety and health of operating personnel and the wellsite people.
There is the pollution and harm of hydrogen sulfide in part oil gas field, so how to find stink damp early in drilling process
Body overflow, and corresponding precautionary measures are taken, efficiently control vulcanization Hydrogen spillover and have great importance.Mainly take at present
Measure is passive closing well mouth, and this method has significant limitation, first, tubing and casing is exposed in hydrogen-sulfide environmental, is easily occurred
Hydrogen embrittlement corrodes；Second, hydrogen sulfide overflows to well head, easily personnel are damaged, equipment is suffered damage.
Utility model content
The purpose of this utility model is that providing a kind of normal circulation downhole preventer of self-opening type combines, and the device runs into vulcanization
It can spontaneously start during hydrogen, and can recycle, solve and hydrogen sulfide gas overflow easily occurs in drilling process
Problem.
Technical scheme is to include preventer ladle body used by the utility model, and preventer ladle body is located on drill bit, blowout prevention
Device ladle body bottom is sprained provided with pit shaft presses check valve, preventer ladle body bottom to be provided with hydrogen sulfide detector, preventer ladle body middle part
It is closed between the borehole wall to be filled with telescopic packer, packer is additionally provided with the middle part of preventer ladle body and is sprained pressure check valve, preventer
Ladle body top is provided with by-passing valve, and preventer ladle body top is provided with upper bearing (metal), and preventer ladle body bottom is provided with lower bearing, upper bearing (metal) with
Lower bearing plays fixation and telescopic packer is fixed on into drill bit top.
The beneficial effects of the utility model are to find hydrogen sulfide gas overflow early in drilling process, and take and accordingly arrange
Apply, effectively control vulcanization Hydrogen spillover.
Brief description of the drawings
Fig. 1 is the utility model device structural representation.
In figure, 1. preventer ladle bodies, 2. drill bits, 3. pit shafts, which are sprained, presses check valve, 4. hydrogen sulfide detectors, 5. boreholes wall, 6. sets
Cartridge type packer, 7. packers, which are sprained, presses check valve, 8. by-passing valves, 9. upper bearing (metal)s, 10. lower bearings.
Embodiment
The utility model is described in detail with reference to embodiment.
The utility model includes preventer ladle body 1 as shown in Figure 1, and preventer ladle body 1 is located on drill bit 2, preventer ladle body 1
Bottom is provided with hydrogen sulfide detector 4 provided with sprain pressure check valve 3, the bottom of preventer ladle body 1 of pit shaft, the middle part of preventer ladle body 1 and
Closed between the borehole wall 5 to be filled with telescopic packer 6, the middle part of preventer ladle body 1 is additionally provided with packer and sprained pressure check valve 7, works as inspection
When measuring hydrogen sulfide, the packer check valve 7 that builds the pressure is had an effect, and prevents drilling fluid from being flowed out from telescopic packer 6, preventer bucket
The top of body 1 is provided with by-passing valve 8, and when hydrogen sulfide detector 4 detects that overflow occurs for hydrogen sulfide, telescopic packer 6 then expands, and seals
Every lower part borehole annular space, prevent hydrogen sulfide on alter, now the pit shaft check valve 3 that builds the pressure can prevent the circulation of drilling fluid, drilling well
Liquid flows out from by-passing valve 8, keeps the normal circulation of drilling fluid.
The upper and lower part of preventer ladle body 1 is additionally provided with upper bearing (metal) 9 and lower bearing 10, and upper bearing (metal) 9 rises with lower bearing 10
Fixation, telescopic packer 6 is fixed on drill bit top.
The advantages of the utility model, also resides in easy to maintain, and rationally distributed, operating aspect, feasibility is good, practical, energy
It is enough effectively to prevent the overflow of hydrogen sulfide from revealing, reduce the harm to personnel and environment.
Described above is only to better embodiment of the present utility model, not makees any form to the utility model
On limitation, it is every according to the technical essence of the utility model to any simple modification made for any of the above embodiments, equivalent variations
With modification, belong in the range of technical solutions of the utility model.
Claims (1)
- A kind of 1. normal circulation downhole preventer combination of self-opening type, it is characterised in that：Including preventer ladle body, preventer ladle body is located at On drill bit, preventer ladle body bottom is sprained provided with pit shaft presses check valve, preventer ladle body bottom to be provided with hydrogen sulfide detector, blowout prevention Telescopic packer is filled with closed between the borehole wall in the middle part of device ladle body, packer is additionally provided with the middle part of preventer ladle body and sprains pressure unidirectionally Valve, preventer ladle body top are provided with by-passing valve, and preventer ladle body top is provided with upper bearing (metal), and preventer ladle body bottom is provided with lower axle Hold, upper bearing (metal) plays fixation with lower bearing and telescopic packer is fixed on into drill bit top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720897926.4U CN207033396U (en) | 2017-07-24 | 2017-07-24 | A kind of normal circulation downhole preventer combination of self-opening type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720897926.4U CN207033396U (en) | 2017-07-24 | 2017-07-24 | A kind of normal circulation downhole preventer combination of self-opening type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207033396U true CN207033396U (en) | 2018-02-23 |
Family
ID=61465440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720897926.4U Expired - Fee Related CN207033396U (en) | 2017-07-24 | 2017-07-24 | A kind of normal circulation downhole preventer combination of self-opening type |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207033396U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110607995A (en) * | 2019-09-29 | 2019-12-24 | 中国矿业大学 | Method for preventing casing from being broken in new underground construction hydrological drilling |
| CN111255443A (en) * | 2020-02-20 | 2020-06-09 | 中国石油大学(华东) | Intelligent control system for underground gas invasion |
-
2017
- 2017-07-24 CN CN201720897926.4U patent/CN207033396U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110607995A (en) * | 2019-09-29 | 2019-12-24 | 中国矿业大学 | Method for preventing casing from being broken in new underground construction hydrological drilling |
| CN111255443A (en) * | 2020-02-20 | 2020-06-09 | 中国石油大学(华东) | Intelligent control system for underground gas invasion |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20180223 Termination date: 20190724 |