CN200952383Y - Air drilling underwell fire-extinguishing valve - Google Patents
Air drilling underwell fire-extinguishing valve Download PDFInfo
- Publication number
- CN200952383Y CN200952383Y CN 200620129362 CN200620129362U CN200952383Y CN 200952383 Y CN200952383 Y CN 200952383Y CN 200620129362 CN200620129362 CN 200620129362 CN 200620129362 U CN200620129362 U CN 200620129362U CN 200952383 Y CN200952383 Y CN 200952383Y
- Authority
- CN
- China
- Prior art keywords
- protection sliding
- downhole
- bushing
- sliding sleeve
- outer barrel
- 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 - Lifetime
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Abstract
The utility model relates to a downhole fire valve for air drilling, and pertains to petroleum and natural gas exploration and development field, which comprises an outer barrel (1), a isolating ring (2), a fixed bushing (3), a spring (4), a protection sliding bushing (5) and a metal ring (6). The fixed bushing (3) is positioned inside the outer barrel (1). The isolating ring (2) is connected with the central round hole of the protection sliding bushing (5) by the screw thread on the lower part. The spring sheaths outside the bar grip of the isolating ring (2) and is positioned between the fixed bushing (3) and the protection sliding bushing (5). The outer barrel (1) is provided with limited steps on the lower part of the inner wall. The metal ring (6) is positioned inside the hollow cavity formed by the protection sliding bushing (5) body and the limited steps on the inner wall of the outer barrel (1). The downhole fire valve could isolate the air from entering the downhole effectively when combustion occurs in the downhole and prevent the continuous combustion in the downhole. And the utility model also has the advantages of quick temperature susceptibility, quick open-and-close, and convenient maintenance.
Description
Technical field
The utility model relates to oil, natural gas exploration and development field, particularly a kind of fire valve that is used for the fire extinguishing of air drilling down-hole.
Background technology
Air drilling is as very fast, the widely used drilling technology of development in recent years, and this drilling technology has the advantages that to improve bit speed, solve drilling well particular difficulty and reduction drilling cost, helps finding and the protection oil-gas Layer.In the air drilling process, owing to use air as the drilling well medium, the pit shaft internal pressure is lower than strata pressure, causing natural gas in the stratum to enter pit shaft mixes with air, natural gas catches fire easily under the high temperature in shaft bottom, condition of high voltage, as can not in time finding and take measures, will blow drilling tool, cause down-hole accident, can cause well to scrap even burn ground installation when serious.
The method that addresses this problem in the world wide has two kinds at present:
1. adopt inert gas such as nitrogen etc. or adopt gas drilling, thereby avoid the catch fire generation of phenomenon of down-hole.But its price of the equipment that nitrogen injection drilling is used is more more than double than air drilling equipment, but also needs the update cost of system nitrogen film, so the application cost height, and gas drilling must carry out in the place that gas source is arranged, and has also limited this The Application of Technology scope.
2. the ground detection down-hole catches fire, the fire extinguishing of taking measures then.The ground detection down-hole catches fire, and the basic principle of taking measures to put out a fire then is composition, content and the gas temperature by test air drilling chip removal mouth place gas, thereby the situation of can the early detection down-hole catching fire takes appropriate measures.In case but the problem that this method exists does not just have gas to return out when to be well not smooth in the well, bottom pressure raises, and checkout gear can't detect above-mentioned situation, thereby loses the good opportunity of fire extinguishing.
Summary of the invention
The utility model provides a kind of volume little, reusable, easy to maintenance and air drilling down-hole fire valve that can the down-hole quick extinguishing.
For realizing above purpose; the technical scheme that the utility model is taked is by urceolus 1; shading ring 2; fixed cover 3; spring 4; protection sliding sleeve 5 and metal ring 6 are formed; the two ends of urceolus 1 have the API standard thread to buckle; can be connected with down-hole equipment; inside has screw thread to be connected with fixed cover 3; protection sliding sleeve 5 centers are drilled with screwed hole; be used for being connected with the bar handle of shading ring 2; the protection sliding sleeve has 2 round tube holes about top; spring 4 is sleeved on the bar handle of shading ring 2; and between fixed cover 3 and protection sliding sleeve 5, metal ring 6 is positioned at the ring cavity of protection sliding sleeve 5 bodies and outer tube inner wall formation.
The effect of spring 4 is to avoid protecting in drilling process sliding sleeve 5 to be moved.Metal ring 6 can be chosen different kinds of metals according to the bottom hole temperature (BHT) difference; and temperature-sensitive changes fast; when the down-hole catches fire; because bottom hole temperature (BHT) raises; reach behind the fusing point of metal metal ring 6 fusings; in the circular hole flow channel of protection sliding sleeve; and shading ring 2 moves down under action of gravity with protection sliding sleeve 5; the protection sliding sleeve slides to the limited step of urceolus bottom for 5 times; and shading ring slides to fixed cover 3 tops for 2 times; inlet channel is shut, thereby, stoped the shaft bottom to continue to catch fire in case realize in time cutting off source of the gas after the down-hole catches fire.
Usually the down-hole fire valve is in opening when normal construction, does not influence normal wellbore construction.
Description of drawings
Fig. 1 the utility model structural representation;
Fig. 2 the utility model opening schematic diagram;
Fig. 3 the utility model closed condition schematic diagram.
The specific embodiment
Below in conjunction with drawings and the specific embodiments the utility model is further described.
Fig. 1 is a structure chart of the present utility model; form by urceolus 1, shading ring 2, fixed cover 3, spring 4, protection sliding sleeve 5 and metal ring 6; the two ends of urceolus 1 have the API standard thread to buckle; can be connected with down-hole equipment; inside has screw thread to be connected with fixed cover 3; protection sliding sleeve 5 centers are drilled with screwed hole; be used for being connected with the bar handle of shading ring 2; the protection sliding sleeve has 2 round tube holes about top; spring 4 is sleeved on the bar handle of shading ring 2; and between fixed cover 3 and protection sliding sleeve 5, metal ring 6 is positioned at the ring cavity of protection sliding sleeve 5 bodies and outer tube inner wall formation.
Fig. 2 and Fig. 3 are respectively opening of the present utility model and closed condition schematic diagram.Normally creeping under the state, fire valve is in opening, and air enters the shaft bottom from the passage at shading ring 2 two ends; After abnormal conditions appearred in the shaft bottom, and the generation shaft bottom is on fire, bottom hole temperature (BHT) raise, after temperature surpasses the fusing point of metal.Metal ring 6 begins to be fused into liquid; and from the circular hole of protection sliding sleeve 5, discharge; admission passage; and shading ring 2 is moved down by the effect of gravity with protection sliding sleeve 5; the protection sliding sleeve slides to the limited step of urceolus bottom for 5 times, and shading ring slides to fixed cover 3 tops for 2 times, and the passage that air enters is shut; stop air to continue to enter the shaft bottom and mix with natural gas and burn away, play the purpose of fire extinguishing.
Claims (1)
1. air drilling down-hole fire valve; it is characterized in that: by urceolus (1); shading ring (2); fixed cover (3); spring (4); protection sliding sleeve (5) and metal ring (6) are formed; fixed cover (3) is positioned at urceolus (1) inside; shading ring (2) bottom has screw thread to be connected with protection sliding sleeve (5) center hole; spring (4) is sleeved on the bar handle of shading ring (2); and be positioned between fixed cover (3) and the protection sliding sleeve (5); limited step is arranged at urceolus (1) inwall bottom, and metal ring (6) is positioned at the body of protection sliding sleeve (5) and the cavity that urceolus (1) inwall limited step forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620129362 CN200952383Y (en) | 2006-07-12 | 2006-07-12 | Air drilling underwell fire-extinguishing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620129362 CN200952383Y (en) | 2006-07-12 | 2006-07-12 | Air drilling underwell fire-extinguishing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200952383Y true CN200952383Y (en) | 2007-09-26 |
Family
ID=38810685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620129362 Expired - Lifetime CN200952383Y (en) | 2006-07-12 | 2006-07-12 | Air drilling underwell fire-extinguishing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200952383Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107605431A (en) * | 2017-09-11 | 2018-01-19 | 中国石油大学(华东) | Air drilling underground fire extinguishing pipe nipple |
-
2006
- 2006-07-12 CN CN 200620129362 patent/CN200952383Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107605431A (en) * | 2017-09-11 | 2018-01-19 | 中国石油大学(华东) | Air drilling underground fire extinguishing pipe nipple |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20081212 Address after: Hongyan Karamay Road, the Xinjiang Uygur Autonomous Region No. 80, zip code: 834000 Patentee after: Western Drilling Kelamayi Drilling Technology Institute Address before: Hongyan Karamay Road, the Xinjiang Uygur Autonomous Region No. 80, zip code: 834000 Patentee before: Research Inst of Drilling Technology, Xinjiang Petroleum Administration |
|
| ASS | Succession or assignment of patent right |
Owner name: WEST DRILLING KARAMAY DRILLING CRAFT RESEARCH INST Free format text: FORMER OWNER: DRILLING WELL TECHNOLOGY INSTITUTE, PETROLEUM ADMINISTRATION BUREAU, XINJIANG Effective date: 20081212 |
|
| CX01 | Expiry of patent term |
Granted publication date: 20070926 |
|
| EXPY | Termination of patent right or utility model |