CN102913159A - Continuous circulation valve - Google Patents
Continuous circulation valve Download PDFInfo
- Publication number
- CN102913159A CN102913159A CN 201210420170 CN201210420170A CN102913159A CN 102913159 A CN102913159 A CN 102913159A CN 201210420170 CN201210420170 CN 201210420170 CN 201210420170 A CN201210420170 A CN 201210420170A CN 102913159 A CN102913159 A CN 102913159A
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- China
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- valve body
- continuous circulation
- lower valve
- bypass pipe
- valve
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Abstract
The invention discloses a continuous circulation valve, which relates to a petroleum drilling tool. The continuous circulation valve disclosed by the invention comprises an upper valve body and a lower valve body that are connected with each other, wherein the upper valve body is provided with a bypass pipe connection hole and a cock hole, and the center lines of the two holes are located on one same plane; a bypass pipe is inserted in the bypass pipe connection hole; a spherical valve core is arranged between the upper valve body and the lower valve body; an upper valve seat and a lower valve seat are arranged on two sides of the spherical valve core respectively; and butterfly springs are arranged between the upper valve seat and the lower valve seat, and between the upper valve body and the lower valve body, respectively. The continuous circulation valve can realize the continuous circulation of downhole drilling fluid in the whole well drilling process, so that the constancy of bottom hole pressure in the drill stem connecting and dismantling operation process is maintained, and the downhole drilling fluid operates within the range between the maximal formation cavitation pressure and the minimal formation breakdown pressure, and the difficulty in narrow cavitation pressure and breakdown pressure windows encountered in a project can be solved.
Description
Technical field
The present invention relates to a kind of oil drilling tool.
Background technology
Paying no attention to disconnected circulating drilling technology is an emerging drilling technology of developing in recent years, when in drilling process, running into the very narrow stratum of window, keep making up a joint or column during the uninterrupted circulation of down-hole drilling fluids have important engineering significance.Uninterrupted circulation can make the circulation equal yield density of drilling fluid maintain in certain scope, in normal drilling process, the upper and lower pressure oscillation that can effectively avoid making up a joint or cause during the column operation, clean continuously well and improve the condition of work of well, reduce to a great extent the lost-circulation of drilling fluid, effectively reduced formation fracture, well kick, bit freezing, drill bit or the Bottom Hole Assembly (BHA) probability that the down-hole accident such as bit freezing occurs that is hampered.Uninterrupted circulating valve technology can be applied in the exploitation of extended reach well (horizontal well), deep well, under balance pressure drilling, narrow hole one fracture pressure window well, presser sensor well, tail pipe circulating drilling etc.; not only can effectively strengthen the stability of the borehole wall; and can protect well exposed oil reservoir, reduced to a certain extent the development cost in difficult producing oil, gas field.Therefore, uninterrupted circulating valve technology has good future in engineering applications.
Summary of the invention
The present invention aims to provide a kind of uninterrupted circulating valve of simple in structure, flexible and convenient operation.
Uninterrupted circulating valve of the present invention comprises interconnective upper valve body and lower valve body, has bypass pipe connecting hole and faucet hole on the upper valve body, and the center line in these two holes at grade; Be inserted with bypass pipe in the bypass pipe connecting hole, be provided with ball valve core between the upper and lower valve body, the both sides of ball valve core are respectively equipped with upper valve base and lower valve base, are equipped with respectively butterfly spring between upper and lower valve seat and the upper and lower valve body.
The present invention can realize the uninterrupted circulation of down-hole drilling fluids in the whole drilling process, connect, unload the constant of bottom pressure in the drilling rod operating process thereby maintain, simultaneously so that the shaft bottom drilling fluid is operated within maximum stratum cavity pressure and the minimum formation cracking pressure scope, can solve the narrow difficult problem of the pore pressure that runs on the engineering and fracture pressure window.
Description of drawings
Fig. 1 is the front view of embodiment one.
Fig. 2 is the local enlarged diagram of valve core among Fig. 1.
The specific embodiment
Embodiment one.
Uninterrupted circulating valve comprises interconnective upper valve body 1 and lower valve body 5, has bypass pipe 4 connecting holes and faucet hole on the upper valve body 1, and the center line in these two holes at grade; Be inserted with bypass pipe 4 in bypass pipe 4 connecting holes, be provided with ball valve core 3 between the upper and lower valve body 1,5, the both sides of ball valve core 3 are respectively equipped with upper valve base 2 and lower valve base 6, upper and lower valve seat 2,6 and upper and lower valve body 1,5 between be equipped with respectively butterfly spring 7.
Because outside valve body assembly is connected between 2 drill strings, and the inner installation runner conversion equipment that needs, so it is designed to upper and lower valve body 1,5 structures.The female joint on upper valve body 1 top is connected with the male joint of upper drilling string, and the male joint of upper valve body 1 bottom is connected with the female joint of upper drilling string, adopts regular screw threads to connect between the upper and lower valve body 1,5, possesses simultaneously sealing function.
Upper and lower valve body 1,5 has the function that the protection ectosome is provided for internal mechanism, also has the function of transmitting drill string power simultaneously, and both are all cylindrical.Leave 1 hole that cooperates with bypass pipe 4 (seeing Fig. 1) at upper valve body 1,1 faucet hole that is used for fitting operation mechanism in addition, the center line in 2 holes is at grade.Inner valve core 3 assemblies are uninterrupted circulating valve core components (seeing Fig. 2), its major function is: connect at needs, when unloading drilling rod, runner is switched to the operating position (closing simultaneously straight-through runner) of bypass flow channel, can switch back to original straight-through runner (closing simultaneously bypass flow channel) routine work position after converting, reach the purpose of conversion valve body inner flow passage.At this, consider to adopt the mode (namely leaving the T shape hole of 2 equal diameters at spheroid) of tee ball valve, this is because ball valve has the following advantages: the plug valve that 1. has similar structures has been obtained good effect; 2. ball valve is one of the shortest structure that solves the path transfer problem, only needs valve core 3 rotations 900 to realize; 3. compact conformation can keep good harmony with drill string; 4. flexible operation, convenience; 5. safeguard simple.
Valve core 3 is lower in working order, and outside spherical matches with upper lower valve base 6 faces, forms metal-metal and firmly seal under the drilling liquid pressure effect.Butterfly spring 7 is installed between the bottom contact surface of lower valve base 6 and valve body, makes valve core 3 become a floating construction under the fluid pressure effect, the moment of torsion when effectively reducing valve core 3 rotation.Upper lower valve base 6 all is designed to the dual Piston structure, can guarantee in valve core 3 location free procedures and the axiality between valve body, strengthens the reliability of floating, and has guaranteed that valve core 3 seals in rotary course and between the valve seat, and phenomenon does not deflect.
Claims (1)
1. uninterrupted circulating valve is characterized in that comprising interconnective upper valve body (1) and lower valve body (5), has bypass pipe (4) connecting hole and faucet hole on the upper valve body (1), and the center line in these two holes at grade; Be inserted with bypass pipe (4) in bypass pipe (4) connecting hole, upper and lower valve body is provided with ball valve core (3) between (1,5), the both sides of ball valve core (3) are respectively equipped with upper valve base (2) and lower valve base (6), and upper and lower valve seat (6) and upper and lower valve body are equipped with respectively butterfly spring (7) between (1,5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210420170 CN102913159A (en) | 2012-10-29 | 2012-10-29 | Continuous circulation valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210420170 CN102913159A (en) | 2012-10-29 | 2012-10-29 | Continuous circulation valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102913159A true CN102913159A (en) | 2013-02-06 |
Family
ID=47611702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210420170 Pending CN102913159A (en) | 2012-10-29 | 2012-10-29 | Continuous circulation valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102913159A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103485730A (en) * | 2013-10-11 | 2014-01-01 | 长江大学 | Uninterrupted air drilling circulating nipple |
| CN106050171A (en) * | 2016-07-31 | 2016-10-26 | 贾广生 | Continuous well washing device of water injection well tank car |
| CN108590555A (en) * | 2018-04-13 | 2018-09-28 | 中国石油大学胜利学院 | A kind of Continuous Circulation Drilling System T-type integrated form triple valve and its application method |
-
2012
- 2012-10-29 CN CN 201210420170 patent/CN102913159A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103485730A (en) * | 2013-10-11 | 2014-01-01 | 长江大学 | Uninterrupted air drilling circulating nipple |
| CN106050171A (en) * | 2016-07-31 | 2016-10-26 | 贾广生 | Continuous well washing device of water injection well tank car |
| CN106050171B (en) * | 2016-07-31 | 2019-01-01 | 贾广生 | Water injection well tank car continuous well cleaning device |
| CN108590555A (en) * | 2018-04-13 | 2018-09-28 | 中国石油大学胜利学院 | A kind of Continuous Circulation Drilling System T-type integrated form triple valve and its application method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130206 |