CN201851031U - Thick-walled drill pipe - Google Patents
Thick-walled drill pipe Download PDFInfo
- Publication number
- CN201851031U CN201851031U CN2010206162416U CN201020616241U CN201851031U CN 201851031 U CN201851031 U CN 201851031U CN 2010206162416 U CN2010206162416 U CN 2010206162416U CN 201020616241 U CN201020616241 U CN 201020616241U CN 201851031 U CN201851031 U CN 201851031U
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- Prior art keywords
- drill pipe
- drilling rod
- thick
- connector
- walled
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Abstract
A thick-walled drill pipe is applied to well drilling of natural gas and coal bed gas of petroleum and mainly comprises a drill pipe body, a connector, an outer thickening section of a connector body and a conical surface. The drill pipe body is a cylinder and provided with a central hole, the connector is also a cylinder and provided with a central hole, API (American Petroleum Institute) internal threads are arranged at the top end of the connector, and the connector body is connected to the lower end of the connector. The thick-walled drill pipe is characterized in that the outer thickening section is welded at the lower end of the connector body, the drill pipe body is arranged on the lower portion of the outer thickening section, and an outer wall between the outer thickening section and the drill pipe body is in transition by the aid of the conical surface. Compared with an existing heavy weight drill pipe, the thick-walled drill pipe has the advantages that the thickness of the wall of the drill pipe body is larger than the wall of a conventional heavy weight drill pipe, the inner diameter of the body of the thick-walled drill pipe is the same with that of the joint, the inner periphery of the integral thick-walled drill pipe does not have sectional change points, fluidity of drilling fluid in the drill pipe is fine, and the drill pipe avoids easy eddy or erosion due to sectional change. Simultaneously, rigidity of the integral drill pipe can be smoothly transited, and the drill pipe can replace the heavy weight drill pipe and reduce failure accidents.
Description
Technical field
The utility model relates to petroleum gas and cbm exploration drilling technology field, and particularly a kind of drilling rod is a kind of heavy wall drill pipe.
Background technology
Drilling rod is a kind of important tool in petroleum gas and the cbm exploration exploitation, it is the important component part of DRILL-STRING SYSTEM, be positioned at the bottom of whole drill string, its main effect is transfer torque and sets up the mud inner cycle channel, ensure carrying out smoothly of drilling process, the compound action of multiple load such as bear tension and compression, bending and reverse.
In the drill string assembly of reality, the small size drill collar that often runs into the bottom directly links to each other with drilling rod, especially adopts in the straight well construction.The wall thickness of conventional drilling rod is divided into two kinds of 9.19mm and 12.7mm, the drill collar wall thickness 46.8mm that is attached thereto, when drilling rod directly links to each other with drill collar, become the rigidity catastrophe point of whole drill string with the drilling rod that drill collar faces mutually, simultaneously, drilling rod might be in the point of neutralization position of drill string because of the pressure of the drill fluctuation, thereby makes force status extremely abominable, causes the drilling rod of the probability of these a few cylindrical drill bars inefficacies apparently higher than other positions.At present, in drill string assembly, and between drill collar and drilling rod, often requiring increases heavy weight drill pipe, in order to improve the pressure of the drill, the rigidity of whole drill string is seamlessly transitted, but the heavy weight drill pipe manufacturing procedure is many, the price height.A kind of rigidity of inventing under this background is between the heavy wall drill pipe of conventional drilling rod and drill collar.
The utility model content
The purpose of this utility model is: a kind of heavy wall drill pipe is provided, and the rigidity that makes heavy wall drill pipe replaces heavy weight drill pipe in drill string assembly between conventional drilling rod and drill collar, makes the rigidity smooth excessiveness of whole drilling assembly, reduces the generation of drilling failure.
The technical solution adopted in the utility model is: heavy wall drill pipe, mainly by the drilling rod body, joint, fittings body external upset (EU) section and taper seat are formed, the drilling rod body is the cylinder bodily form and centre bore is arranged, joint has centre bore for the cylinder bodily form, there is API internal thread (the API screw thread is international drilling rod standard thread) on the top of joint, the lower end of joint is connected with fittings body, there is lower contact drilling rod body lower end, it is characterized in that: be welded with the external upset (EU) section in the lower end of fittings body, the drilling rod body is arranged at the bottom of external upset (EU) section, and the outer wall between thick section and the drilling rod body is by the taper seat transition outside.
The thickness of drilling rod body is 18.5mm.
Between taper seat and this external surface of drilling rod transition arc is arranged, the radius of transition arc is between 150～200mm.
The length of external upset (EU) section is between 100～250mm; The length of taper seat is between 100～150mm.
The beneficial effects of the utility model: the utility model heavy wall drill pipe is compared with existing heavy weight drill pipe, drilling rod body wall thickness is greater than conventional heavy weight drill pipe body wall thickness, the body internal diameter of heavy wall drill pipe is identical with the joint internal diameter, whole heavy wall drill pipe internal diameter do not have the changes of section point, the good fluidity of drilling fluid in drilling rod is difficult for eddy current or erosion that generation produces because of changes of section.Simultaneously, the rigidity of heavy wall drill pipe between drill collar and conventional drilling rod with external diameter, drill collar with add heavy wall drill pipe between drilling rod is connected, can seamlessly transit the rigidity of whole drill string, in the straight well operation, can substitute heavy weight drill pipe, reduce the generation of failure accidents.Processing cost is lower than heavy weight drill pipe.
Description of drawings
Fig. 1 is the structural profile schematic diagram of the female end of the utility model heavy wall drill pipe.
Among the figure, 1. drilling rod body, 2. joint, 3. external upset (EU) section, 4. taper seat, 5. transition arc, 6. fittings body, 7. weld seam.
The specific embodiment
Embodiment 1: with a heavy wall drill pipe is example, and the utility model is described in further detail.
Consult Fig. 1.The utility model heavy wall drill pipe, mainly form by drilling rod body 1, joint 2, fittings body 6 external upset (EU) sections 3 and taper seat 4, drilling rod body 1 is for the cylinder bodily form and centre bore is arranged, and drilling rod body 1 external diameter is consistent with this body diameter of drilling rod in SY/T 5561 standards, and the thickness of drilling rod body 1 is 18.5mm.Joint 2 has centre bore for the cylinder bodily form, and there is the API internal thread on the top of joint 2, and the lower end of joint 2 is connected with fittings body 6, and there is lower contact drilling rod body 1 lower end, and lower contact has the API external screw thread.
Adopt rubbing method to be welded with external upset (EU) section 3 in the lower end of fittings body 6, between fittings body 6 and external upset (EU) section 3, weld seam 7 is arranged.The length of external upset (EU) section 3 is 150mm.Drilling rod body 1 is arranged at the bottom of external upset (EU) section 3, and the outer wall between thick section 3 and the drilling rod body 1 is by taper seat 4 transition outside, and the length of taper seat 4 is 120mm.Between taper seat 4 and drilling rod body 1 external surface transition arc 5 is arranged, the radius of transition arc 5 is 180mm.
Claims (4)
1. heavy wall drill pipe, mainly by drilling rod body (1), joint (2), fittings body (6) external upset (EU) section (3) and taper seat (4) are formed, drilling rod body (1) is for the cylinder bodily form and centre bore is arranged, joint (2) has centre bore for the cylinder bodily form, there is the API internal thread on the top of joint (2), the lower end of joint (2) is connected with fittings body (6), there is lower contact drilling rod body (1) lower end, it is characterized in that: be welded with external upset (EU) section (3) in the lower end of fittings body (6), drilling rod body (1) is arranged at the bottom of external upset (EU) section (3), and the outer wall between thick section (3) and the drilling rod body (1) is by taper seat (4) transition outside.
2. heavy wall drill pipe according to claim 1 is characterized in that: the thickness of drilling rod body (1) is 18.5mm.
3. heavy wall drill pipe according to claim 1 and 2 is characterized in that: between taper seat (4) and drilling rod body (1) external surface transition arc (5) is arranged, the radius of transition arc (5) is between 150～200mm.
4. heavy wall drill pipe according to claim 1 and 2 is characterized in that: the length of external upset (EU) section (3) is between 100～250mm; The length of taper seat (4) is between 100～150mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206162416U CN201851031U (en) | 2010-11-18 | 2010-11-18 | Thick-walled drill pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206162416U CN201851031U (en) | 2010-11-18 | 2010-11-18 | Thick-walled drill pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201851031U true CN201851031U (en) | 2011-06-01 |
Family
ID=44093430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206162416U Expired - Lifetime CN201851031U (en) | 2010-11-18 | 2010-11-18 | Thick-walled drill pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201851031U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102877797A (en) * | 2011-07-15 | 2013-01-16 | 中国石油天然气集团公司 | Elevator-step free directional crossing dedicated tool joint |
| CN103143669A (en) * | 2012-12-28 | 2013-06-12 | 南通永大管业股份有限公司 | External upsetting method for oil well pipe and oil well pipe manufactured by using external upsetting method |
| CN104975813A (en) * | 2015-06-06 | 2015-10-14 | 秦健 | Oil well pipe |
-
2010
- 2010-11-18 CN CN2010206162416U patent/CN201851031U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102877797A (en) * | 2011-07-15 | 2013-01-16 | 中国石油天然气集团公司 | Elevator-step free directional crossing dedicated tool joint |
| CN102877797B (en) * | 2011-07-15 | 2015-12-02 | 中国石油天然气集团公司 | Without elevator step directional traversing drill rod special joint |
| CN103143669A (en) * | 2012-12-28 | 2013-06-12 | 南通永大管业股份有限公司 | External upsetting method for oil well pipe and oil well pipe manufactured by using external upsetting method |
| CN103143669B (en) * | 2012-12-28 | 2015-09-30 | 南通永大管业股份有限公司 | Oil well pipe external upset (EU) method and the oil well pipe using the method to manufacture |
| CN104975813A (en) * | 2015-06-06 | 2015-10-14 | 秦健 | Oil well pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110601 |
|
| CX01 | Expiry of patent term |