CN2718217Y - By-pass safety valve for petroleum drilling tool - Google Patents
By-pass safety valve for petroleum drilling tool Download PDFInfo
- Publication number
- CN2718217Y CN2718217Y CN 200420011370 CN200420011370U CN2718217Y CN 2718217 Y CN2718217 Y CN 2718217Y CN 200420011370 CN200420011370 CN 200420011370 CN 200420011370 U CN200420011370 U CN 200420011370U CN 2718217 Y CN2718217 Y CN 2718217Y
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- CN
- China
- Prior art keywords
- piston
- pass
- drilling tool
- hole
- drilling
- 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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- Auxiliary Devices For Machine Tools (AREA)
Abstract
The utility model discloses a by-pass safety valve for petroleum drilling tool which comprises a joint body, a piston limited sleeve, a piston, a safety pin, a sealing component and a steel ball. The piston limited sleeve is arranged on the joint body, the piston is arranged under the piston limited sleeve and is connected with the joint body via the safety pin, the joint body is provided with at least one radial by-pass hole, and the piston is provided with a centre hole. The utility model can accomplish directly leak stoppage working without drill raising, with throwing the steel ball, sealing the pressure and shearing off the safety pin before injecting the leaking-stopping agent, the by-pass hole of the safety valve beside the drilling tool can be opened, so the injected leaking-stopping agent can enter into an annulus through the by-pass safety valve of the drilling tool without through the down hole dynamic drilling tool, the down hole drilling instrument and the drilling head water hole, and therefore, the utility model can avoid blocking and can reduce the drilling times.
Description
Technical field
The utility model relates to the downhole tool in the drilling engineerings such as a kind of petroleum gas, especially relates to a kind of oil drilling tools full by-pass relief valve.
Background technology
In fields such as petroleum gas, in the drilling process, to stop up or helicoid hydraulic motor damages and down-hole when complex situations occurring at bit nozzle, technical measures commonly used are carried out big discharge capacity circulation exactly.As can not in time carrying out, will cause down-hole accident.Present measure generally is not use helicoid hydraulic motor at bad ground, and can only adopt remedial measures passively when above-mentioned complex situations occurring, has increased wellbore construction the risk and cost.A kind of down-hole circulating connection of existing patent has the technology of this class problem of solution, but because the joint latus rectum is less, the downhole testing instrument can not by with drilling fluid by the time pressure drop greatly and the subsidiary bypass mechanism problems such as in use reliability is low of often opening, therefore the requirement of the modern drilling technology of incompatibility and increase other unsafe factor can not provide safety guarantee for drilling tool.
Summary of the invention
The purpose of this utility model just is to provide a kind of and can stops up at bit nozzle, helicoid hydraulic motor damages and when carrying out plugging operations, can open by-pass prot fast, set up the oil drilling tools full by-pass relief valve of new circulation.
The purpose of this utility model can realize by following measure:
The utility model comprises fittings body, piston stop collar, piston, safety pin, seal and steel ball; The piston stop collar is arranged in the fittings body, and piston is positioned at piston stop collar below, and piston is connected with fittings body by safety pin, and has the radially by-pass prot of at least one on fittings body, offers centre bore on piston.
Piston in the utility model is equipped with high voltage bearing seal.Have at least one radially by-pass prot on the described fittings body.Certainly, also can offer a plurality of by-pass prots as required.
The utility model has following characteristics owing to adopt said mechanism:
1, owing to adopt modern designs to calculate means, tool construction length is little, does not influence the drilling assembly structure;
2, latus rectum very much not influences the tester use;
3, simple in structure, cheap for manufacturing cost, the reliability height;
4, design of Sealing Structure is reasonable, and is high pressure resistant, and sealing is reliable.
The utility model can be realized not pulling out of hole and directly implement plugging operations, and before pump people sealing agent, cut off measures such as safety pin by throwing steel ball, the pressure of spraining, open the by-pass prot of drilling tool full by-pass relief valve, make the sealing agent that pumps into enter annular space from the drilling tool full by-pass relief valve, and without mud motor, down-hole with boring instrument and bit port, thereby avoid blockage phenomenon, can reduce the number of times that makes a trip.
Description of drawings
Accompanying drawing is a structural representation of the present utility model;
The specific embodiment
The utility model is done with detailed description below in conjunction with drawings and Examples:
As shown in the figure, the utility model comprises fittings body (1), piston stop collar (2), piston (3), safety pin (4), seal (5) and steel ball; Piston stop collar (2) is arranged in the fittings body (1), piston (3) is positioned at piston stop collar (2) below, piston (3) is connected with fittings body (1) by safety pin (4), and has more than one radially by-pass prot on fittings body, offers centre bore on piston (3).Piston (3) is equipped with high voltage bearing seal.Have one, two or more radially by-pass prot on the fittings body.
Operating principle of the present utility model is as follows: the utility model is made up of fittings body, stop collar, piston, safety pin etc., places a stop collar in the fittings body, and piston is equipped with in the stop collar below.And have radially by-pass prot on fittings body, because simple in structure, latus rectum is big, can be installed in drill bit or helicoid hydraulic motor top.When normally creeping into, do not throw steel ball, the radially by-pass prot on the fittings body is closed, and drilling fluid is by drill string hydrophthalmia flow through stop collar and piston center hole in the drilling tool full by-pass relief valve, thereby realizes the normal circulation of drilling fluid.At this moment, the drilling tool full by-pass relief valve only plays a tool joint.Occur in creeping into that bit nozzle stops up, screw rod damages, cause pump pressure to raise or the pump of spraining can't circulation time, pitching makes ball drop down onto the piston seat hole, sprains and the safety pin on the piston is cut off after pressing, and descent of piston is opened the radially by-pass prot of fittings body, sets up circulation newly.
The utility model can be realized not pulling out of hole and directly implement plugging operations, and before pump people sealing agent, cut off measures such as safety pin by throwing steel ball, the pressure of spraining, open the by-pass prot of drilling tool full by-pass relief valve, make the sealing agent that pumps into enter annular space from the drilling tool full by-pass relief valve, and without mud motor, down-hole with boring instrument and bit port, thereby avoid blockage phenomenon, can reduce the number of times that makes a trip.
This drilling tool full by-pass relief valve can be installed on drill bit or the helicoid hydraulic motor, must use with the full by-pass relief valve of helicoid hydraulic motor in the time of on being installed in helicoid hydraulic motor.When normally creeping into, do not throw in steel ball in the drilling tool full by-pass relief valve, radially by-pass prot on the fittings body is by piston (3) shutoff, make by-pass prot be in closed condition, drilling fluid is by drill string hydrophthalmia flow through drilling tool full by-pass relief valve, screw rod, bit port, enter bore hole annulus, thereby realize the normal circulation of drilling fluid.At this moment, it only plays a tool joint.
Complex situations appear in the down-hole in drilling process, need set up circulation time fast, lay down and connect kelly bar after the kelly bar pitching again the ball steel is dropped down onto on piston (3) the seat hole, centre bore shutoff with piston (3), pump pressure is raise cut off safety pin, the shoulder place that piston (3) comes downwards to fittings body (1) stops, because piston (3) lower end is arrived piston (3) upper surface distance to fittings body (1) shoulder distance greater than the by-pass prot bottom.Radially by-pass prot on the fittings body (1) is opened fully, thereby sets up new circulation.Stop collar in this drilling tool full by-pass relief valve (2) plays position-limiting action to piston (3).
Claims (3)
1, a kind of oil drilling tools full by-pass relief valve is characterized in that: it comprises fittings body (1), piston stop collar (2), piston (3), safety pin (4), seal (5) and steel ball; Piston stop collar (2) is arranged in the fittings body (1), piston (3) is positioned at piston stop collar (2) below, piston (3) is connected with fittings body (1) by safety pin (4), and has the radially by-pass prot of at least one on fittings body, offers centre bore on piston (3).
2, oil drilling tools full by-pass relief valve according to claim 1 is characterized in that: described piston (3) is equipped with high voltage bearing seal.
3, oil drilling tools full by-pass relief valve according to claim 1 and 2 is characterized in that: have two radially by-pass prots on the described fittings body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420011370 CN2718217Y (en) | 2004-07-30 | 2004-07-30 | By-pass safety valve for petroleum drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420011370 CN2718217Y (en) | 2004-07-30 | 2004-07-30 | By-pass safety valve for petroleum drilling tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2718217Y true CN2718217Y (en) | 2005-08-17 |
Family
ID=34892579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420011370 Expired - Fee Related CN2718217Y (en) | 2004-07-30 | 2004-07-30 | By-pass safety valve for petroleum drilling tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2718217Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101275459B (en) * | 2007-03-27 | 2014-06-18 | 普拉德研究及开发股份有限公司 | Controlling flows in a well |
| CN107217982A (en) * | 2017-07-11 | 2017-09-29 | 中煤科工集团西安研究院有限公司 | Underground coal mine drilling multistage deslagging air screw motor |
-
2004
- 2004-07-30 CN CN 200420011370 patent/CN2718217Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101275459B (en) * | 2007-03-27 | 2014-06-18 | 普拉德研究及开发股份有限公司 | Controlling flows in a well |
| CN107217982A (en) * | 2017-07-11 | 2017-09-29 | 中煤科工集团西安研究院有限公司 | Underground coal mine drilling multistage deslagging air screw motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |