CN113863866A - Blowout prevention and anti-reflux drill bit - Google Patents
Blowout prevention and anti-reflux drill bit Download PDFInfo
- Publication number
- CN113863866A CN113863866A CN202111226659.5A CN202111226659A CN113863866A CN 113863866 A CN113863866 A CN 113863866A CN 202111226659 A CN202111226659 A CN 202111226659A CN 113863866 A CN113863866 A CN 113863866A
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- CN
- China
- Prior art keywords
- drill bit
- blowout
- movable
- prevention
- pipe sleeve
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- 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.)
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
Abstract
The invention provides a blowout-preventing and reverse-flow-preventing drill bit, which comprises: a drill stem; the drill bit is sleeved and fixed at the lower end of the drill rod, a liquid flow channel is arranged in the drill bit, and a blowout preventer is arranged in the liquid flow channel; the blowout preventer can block a fluid flow channel inside the drill bit when in a closed state. According to the blowout-preventing and backflow-preventing drill bit provided by the invention, through the blowout-preventing device, the drill bit is in a smooth state in a normal working positive circulation state, but once a blowout or backflow condition occurs, the liquid channel can be automatically closed under the pushing of the liquid power, so that the effects of preventing the blowout and the backflow are achieved, and the normal working of the drill bit is ensured.
Description
Technical Field
The invention relates to the technical field of drilling equipment, in particular to a blowout-preventing and reverse-flow-preventing drill bit.
Background
The oil drill bit is an important tool for oil drilling, is used for drilling oil when oil is extracted, and the quality of the working performance of the oil drill bit directly influences the drilling quality, the drilling efficiency and the drilling cost.
When the screw drilling tool is used in petroleum and natural gas drilling engineering, on one hand, drilling cuttings and silt are brought by mud and flow backwards to block a water hole of the drill bit, and on the other hand, the drilling fluid is out of control in blowout when the pressure of a hydraulic circulating system is changed, so that the drill bit is not beneficial to work.
Disclosure of Invention
The invention aims to provide a blowout-preventing and reverse-flow-preventing drill bit to solve the problems.
In order to achieve the purpose, the invention provides the following technical scheme: a blowout prevention anti-reverse flow drill bit comprising:
a drill stem;
the drill bit is sleeved and fixed at the lower end of the drill rod, a liquid flow channel is arranged in the drill bit, and a blowout preventer is arranged in the liquid flow channel;
the blowout preventer can block a fluid flow channel inside the drill bit when in a closed state.
As an improvement of the invention, the drill bit is divided into a pipe sleeve part and a drilling blade part, the upper end of the pipe sleeve part is hermetically connected with the drill rod, and the drilling blade part is fixedly arranged at the lower end of the pipe sleeve part;
the blowout preventer is disposed inside the shroud portion.
As an improvement of the present invention, the blowout preventer comprises:
the inner wall of the pipe sleeve part is provided with two opposite movable half valve panels, and a single movable half valve panel is in a semi-conical shape;
the movable half valve panel is connected with the pipe sleeve part through a movable torsion component.
As an improvement of the present invention, the torque assembly includes:
the pressing sleeve is of a vertically-through cylindrical structure, and the outer wall of the pressing sleeve is fixedly connected with the inner wall of the pipe sleeve part;
the inner wall of the pipe sleeve part is integrally formed with a movable torsion boss;
the movable half valve panel is characterized in that a movable button buckling edge is integrally formed at the upper end of the movable half valve panel and is connected with the movable button boss in a matched mode.
As an improvement of the invention, a diversion guide block is further arranged inside the pipe sleeve part, and the diversion guide block is positioned below the movable half valve panel.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is an exterior elevation view of the present invention;
FIG. 2 is a front cross-sectional view of the present invention;
fig. 3 is a top view of the radial fastener of the present invention.
The components in the figure are:
1. the drill rod is provided with a drill rod body,
2. a drill bit, 21, a socket portion, 22, a drilling blade portion,
3. a blowout preventer, 31, a movable half-valve face plate,
4. a movable button component 41, a pressing sleeve 42, a movable button boss 43 and a movable button buckling edge,
5. and a shunting guide block.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Referring to fig. 1, a blowout prevention and reverse flow prevention drill bit includes:
a drill rod 1;
the drill bit 2 is sleeved and fixed at the lower end of the drill rod 1, a liquid flow channel is arranged in the drill bit 2, and a blowout preventer 3 is arranged in the liquid flow channel;
the blowout preventer 3 can block a liquid flow channel inside the drill bit 2 when in a closed state.
As an embodiment of the present invention, the drill bit 2 is divided into a pipe sleeve portion 21 and a drilling blade portion 22, an upper end of the pipe sleeve portion 21 is hermetically connected with the drill rod 1, and the drilling blade portion 22 is fixedly disposed at a lower end of the pipe sleeve portion 21;
the blowout preventer 3 is provided inside the socket portion 21.
As an embodiment of the present invention, the blowout preventer 3 includes:
the inner wall of the pipe sleeve part 21 is provided with two opposite movable half valve panels 31, and a single movable half valve panel 31 is in a semi-circular conical shape;
the movable half valve panel 31 is connected with the pipe sleeve part 21 through a movable knob assembly 4.
As an embodiment of the present invention, the torque assembly 4 includes:
a pressing sleeve 41 having a vertically through tubular structure, the outer wall of which is fixedly connected to the inner wall of the socket portion 21;
the movable torsion boss 42 is integrally formed on the inner wall of the pipe sleeve part 21;
the movable button edge 43 is integrally formed at the upper end of the movable half valve panel 31, and the movable button edge 43 is connected with the movable button boss 42 in a matching manner.
As an embodiment of the present invention, the inside of the pipe sleeve part 21 is further provided with a flow dividing guide block 5, and the flow dividing guide block 5 is located below the movable half valve panel 31.
The working principle and the beneficial effects of the technical scheme are as follows: as a drilling tool bit for exploring petroleum, in order to avoid the out-of-control blowout phenomenon, the drilling tool bit is divided into a pipe sleeve part 21 and a drilling blade part 22, the pipe sleeve part 21 is used for fixing the drilling bit 2 at the lower end of a drill rod 1, the drill rod 1 drives the drilling bit 2 to rotate so as to provide drilling power, and the drilling blade part 22 drills the geology. The blowout preventer 3 provided inside the pipe housing portion 21 is divided into a positive circulation state and a blowout state during operation.
A positive circulation state: when the drilling fluid system is in a positive circulation state or a static state, the two movable half valve panels 31 can be in a completely opened state and cling to the inner wall of the pipe sleeve part 21 to keep a channel open.
And (3) blowout state: when the drilling fluid system is in a blowout state, namely a reverse circulation state, the two movable half valve panels 31 are mutually attached under the hydraulic action to form a closed state, and the automatic closing function is realized to prevent blowout and reverse flow.
According to the blowout-preventing and backflow-preventing drill bit provided by the invention, through the blowout-preventing device, the drill bit is in a smooth state in a normal working positive circulation state, but once a blowout or backflow condition occurs, the liquid channel can be automatically closed under the pushing of the liquid power, so that the effects of preventing the blowout and the backflow are achieved, and the normal working of the drill bit is ensured.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (5)
1. A blowout prevention anti-reverse flow drill bit, comprising:
a drill rod (1);
the drill bit (2) is sleeved and fixed at the lower end of the drill rod (1), a liquid flow channel is arranged in the drill bit (2), and a blowout preventer (3) is arranged in the liquid flow channel;
the blowout preventer (3) can block a liquid flow channel inside the drill bit (2) when in a closed state.
2. A blowout prevention and reverse flow prevention drill bit according to claim 1, characterized in that the drill bit (2) is divided into a socket portion (21) and a drilling blade portion (22), the upper end of the socket portion (21) is connected with the drill rod (1) in a sealing manner, and the drilling blade portion (22) is fixedly arranged at the lower end of the socket portion (21);
the blowout preventer (3) is arranged inside the pipe housing part (21).
3. A blowout prevention and reverse flow prevention drill bit according to claim 2, wherein: the blowout preventer (3) includes:
the inner wall of the pipe sleeve part (21) is provided with two opposite movable half valve panels (31), and a single movable half valve panel (31) is in a semi-conical shape;
the movable half valve panel (31) is connected with the pipe sleeve part (21) through a movable knob assembly (4).
4. A blowout prevention and reverse flow prevention drill bit according to claim 3, wherein: the torque assembly (4) comprises:
a pressing sleeve (41) which is a vertically through cylindrical structure, and the outer wall of the pressing sleeve is fixedly connected with the inner wall of the pipe sleeve part (21);
the inner wall of the pipe sleeve part (21) is integrally formed with a movable torsion boss (42);
the movable half valve panel comprises a movable button buckling edge (43), the upper end of the movable half valve panel (31) is integrally formed with the movable button buckling edge (43), and the movable button buckling edge (43) is connected with the movable button boss (42) in a matched mode.
5. A blowout prevention and reverse flow prevention drill bit according to claim 3, wherein: the interior of the pipe sleeve part (21) is also provided with a shunt guide block (5), and the shunt guide block (5) is positioned below the movable half valve panel (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111226659.5A CN113863866A (en) | 2021-10-21 | 2021-10-21 | Blowout prevention and anti-reflux drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111226659.5A CN113863866A (en) | 2021-10-21 | 2021-10-21 | Blowout prevention and anti-reflux drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113863866A true CN113863866A (en) | 2021-12-31 |
Family
ID=78997063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111226659.5A Pending CN113863866A (en) | 2021-10-21 | 2021-10-21 | Blowout prevention and anti-reflux drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113863866A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2761834Y (en) * | 2004-11-24 | 2006-03-01 | 董洪生 | Blow-out prevention valve during drilling |
| CN101629480A (en) * | 2009-07-31 | 2010-01-20 | 中国石油集团西部钻探工程有限公司准东钻井公司 | Inner blowout preventer of full-port drilling tool |
| CN110029938A (en) * | 2018-01-12 | 2019-07-19 | 中石化石油工程技术服务有限公司 | A kind of air reverse circulation drilling method |
| CN111779464A (en) * | 2020-08-31 | 2020-10-16 | 西南石油大学 | Double-layer pipe double-gradient pressure control drilling underground blowout preventer |
| CN213331022U (en) * | 2020-06-09 | 2021-06-01 | 中国石油天然气股份有限公司 | Blowout preventer and drilling tool |
-
2021
- 2021-10-21 CN CN202111226659.5A patent/CN113863866A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2761834Y (en) * | 2004-11-24 | 2006-03-01 | 董洪生 | Blow-out prevention valve during drilling |
| CN101629480A (en) * | 2009-07-31 | 2010-01-20 | 中国石油集团西部钻探工程有限公司准东钻井公司 | Inner blowout preventer of full-port drilling tool |
| CN110029938A (en) * | 2018-01-12 | 2019-07-19 | 中石化石油工程技术服务有限公司 | A kind of air reverse circulation drilling method |
| CN213331022U (en) * | 2020-06-09 | 2021-06-01 | 中国石油天然气股份有限公司 | Blowout preventer and drilling tool |
| CN111779464A (en) * | 2020-08-31 | 2020-10-16 | 西南石油大学 | Double-layer pipe double-gradient pressure control drilling underground blowout preventer |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211231 |
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| RJ01 | Rejection of invention patent application after publication |