CN202039785U - Durable drill pipe joint with ultrahigh torsional strength - Google Patents
Durable drill pipe joint with ultrahigh torsional strength Download PDFInfo
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- CN202039785U CN202039785U CN2011200644759U CN201120064475U CN202039785U CN 202039785 U CN202039785 U CN 202039785U CN 2011200644759 U CN2011200644759 U CN 2011200644759U CN 201120064475 U CN201120064475 U CN 201120064475U CN 202039785 U CN202039785 U CN 202039785U
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Abstract
The utility model relates to a drill pipe joint used in the drilling process of oil wells or gas wells, in particular to a durable drill pipe joint with ultrahigh torsional strength. The durable drill pipe joint with ultrahigh torsional strength comprises an external threaded joint and an internal threaded joint, wherein the external threaded joint consists of an external threaded external ledge, an external threaded section and an external threaded external end surface; and the internal threaded joint consists of an internal threaded internal end surface, an internal threaded section and an internal threaded external ledge. The durable drill pipe joint with ultrahigh torsional strength is characterized in that the taper range of the external threaded section is 1: 10 to 1: 18 and the taper range of the internal threaded section is 1: 10 to 1: 18. The durable drill pipe joint with ultrahigh torsional strength is mainly used for solving the technical problem that the roots of threads of the existing oil drill pipe joints with V-0.065 tooth-type threads and oil drill pipe joints with V-0.038R tooth-type threads still have larger stress concentration, simultaneously has ultrahigh torsional strength and can satisfy the increasingly complicated well drilling operation requirements.
Description
Technical field
The utility model relates to the tool joint of using in the drilling process of oil well or gas well, the tool joint of particularly a kind of durable type superelevation torsional strength.
Background technology
The tool joint of using in the drilling process of oil well or gas well, the general API standard production that adopt American Petroleum Institute (API) (API) to formulate are made more.American Petroleum Institute (API) (API) is at the joint of petroleum drill rod of 20 beginnings of the century employing V-0.065 tooth form screw thread, and its structure as shown in Figure 1.The form of thread of this tool joint is a V-arrangement, at the bottom of its tooth and crest all be flat, at the bottom of the tooth and crest wide all be 0.065 inch (1.651mm), transition wedge angle radius r at the bottom of the flat tooth and between the bearing surface of tooth side has only 0.38mm, so stress is concentrated very high herein, fatigue crack very easily occurs, so just make the life-span of tool joint become very short.At the bottom of the flat tooth of American Petroleum Institute (API) in mid-term in 20th century, change the round bottom that radius R is 0.038 inch (0.965mm) into V-0.065 tooth form screw thread, stress at the bottom of the tooth is concentrated significantly and is reduced, tool joint is doubled and redoubled fatigue life, this screw thread is called as numeric type (NC) screw thread, can exchange fully with V-0.065 tooth form screw thread, its tooth form is included among the API SPEC 7, is called V-0.038R.But still there are some problems in numeric type (NC) screw thread in application, particularly still has bigger stress to concentrate in Bottom of Thread.And the rear end of the female adapter of API tool joint is inclined-plane in, and the front end of corresponding male connection is an outer inclined-plane, has only the rear end face of a torque resistant shoulder in the male connection of the front end face of female adapter and correspondence, and the joint torsion strength is low.Therefore according to the design of API standard, the torsion strength of above-mentioned joint is generally 80% of body, and above-mentioned API tool joint in use can occur when running into excessive torque that female adapter swells and or failure accidents such as male connection screw thread fracture.Therefore need exploitation to have concentrated, the more durable type superelevation torsional strength tool joint of high torsional resistance characteristic of reduction stress.
The utility model content
The purpose of this utility model is to provide the tool joint of a kind of durable type superelevation torsional strength, it mainly solves the technical problem that still has bigger stress to concentrate at the bottom of the oil tool joint thread tooth of the joint of petroleum drill rod of existing V-0.065 tooth form screw thread and V-0.038R tooth form screw thread, the torsional strength that also has superelevation simultaneously can satisfy complicated day by day drillng operation demand.
The utility model solves the problems of the technologies described above the technical scheme that is adopted.
The tool joint of a kind of durable type superelevation torsional strength, it comprises the male connection with the outer shoulder of external screw thread, external thread section and external screw thread outer face, and the female adapter with the outer shoulder of internal thread inner face, internal thread segment and internal thread; It is characterized in that: the range of taper of described external thread section is that 1:10 is to 1:18; The range of taper of internal thread segment is that 1:10 is to 1:18.
The tool joint of described durable type superelevation torsional strength is characterized in that: tolerance is gone up greater than tolerance on the two ends for 2/5 section in the centre of described external thread section and internal thread segment.
The tool joint of described durable type superelevation torsional strength is characterized in that: the external screw thread tooth form of described external thread section and internal thread segment and the tooth form angle of internal thread tooth form are 60 degree, and the arc radius scope of Bottom of Thread is 1.0mm-1.27mm, 3.5 tooth/inches.
The tool joint of described durable type superelevation torsional strength is characterized in that: the outer distance of shoulder between the external screw thread outer face of described external screw thread greater than shoulder outside the API male joint external screw thread between the outer face apart from 10-14mm.
The tool joint of described durable type superelevation torsional strength is characterized in that: to the distance between the external screw thread outer face, its difference is 0-0.3mm to the outer distance of shoulder between the internal thread inner face of described internal thread more than or equal to shoulder outside the external screw thread.
The beneficial effects of the utility model are: the utility model tool joint has high torsional strength, compares with unidimensional API tool joint, and torsional strength improves about 70%.Can under the prerequisite that guarantees instructions for use, optimize joint dimension, make tool joint have big hydrophthalmia, hang down annular pressure lost, more help the advantage of drilling well.The structure design of this kind Drill Stem Double Shoulder Connector makes the stressed distribution on each tooth of screw thread more even, and the form of thread of optimization obviously reduces the factor of stress concentration at the bottom of the tooth, thereby has improved the fatigue life of tool joint, makes it more durable.In the drilling process of oil well or gas well, the harshness day by day of drilling condition, require also more and more higher to drilling-production equipment, the above-mentioned advantage of the utility model tool joint, well solved the low torsional strength problem of API tool joint, and strengthened the durability of tool joint, make it have good application space.
Description of drawings
Fig. 1 is an API tool joint structure chart; Among the figure: A-male connection, B-female adapter, the outer shoulder of C-external screw thread, D-external screw thread outer face, the outer shoulder of E-internal thread, F-external thread section, G-internal thread segment, H-external screw thread tooth form, I-internal thread tooth form.
Fig. 2 is the utility model durable type superelevation torsional strength tool joint structure chart; Among the figure: 1-male connection, 2-female adapter, the outer shoulder of 3-external screw thread, 4-external screw thread outer face, 5-internal thread inner face, the outer shoulder of 6-internal thread, 7-external thread section, 8-internal thread segment, 9-external screw thread tooth form, 10-internal thread tooth form.
Fig. 3 is form of thread of the present utility model and API V-0.038R form of thread comparison diagram; Among the figure: solid line is a form of thread of the present utility model, and dotted line is an API V-0.038R form of thread.
The specific embodiment
See also Fig. 2, it is the tool joint of a kind of durable type superelevation of the utility model torsional strength.As shown in the figure: it comprises the male connection 1 with the outer shoulder 3 of external screw thread, external thread section 7 and external screw thread outer face 4, and the female adapter 2 with the outer shoulder 6 of internal thread inner face 5, internal thread segment 8 and internal thread; It is characterized in that: the range of taper of described external thread section 7 is that 1:10 is to 1:18; The range of taper of internal thread segment 8 is that 1:10 is to 1:18.Adopt the tapering of non-API, not only help adopting advanced non-API form of thread, and it is long-pending to have increased the dangerouse cross-section of screw thread greatly, thereby improved the torsional strength and the tensile load of joint of petroleum drill rod.Compare with the API tool joint, torsional strength improves about 70%, than general, can improve about 20% with two shoulder joint torsional strengths that API exchanges.
Tolerance is gone up greater than tolerance on the two ends for 2/5 section in the centre of described external thread section 7 and internal thread segment 8.The external screw thread tooth form 9 of described external thread section 7 and internal thread segment 8 and the tooth form angle of internal thread tooth form 10 are 60 degree, and the arc radius scope of Bottom of Thread is 1.0mm-1.27mm, 3.5 tooth/inches.Fig. 3 is form of thread of the present utility model and API V-0.038R form of thread comparison diagram, as shown in the figure: the utility model is bigger than the radius of rounded root of API V-0.038R form of thread, thereby reduced the Bottom of Thread factor of stress concentration, effectively prolong the application life of tool joint, strengthened the durability of tool joint.
The outer shoulder 3 of described external screw thread to the distance between the external screw thread outer face 4 greater than the outer shoulder of API male joint external screw thread between the outer face apart from 10-14mm.The distance that the outer shoulder 6 of described internal thread arrives between the external screw thread outer face 4 more than or equal to the outer shoulder 3 of external screw thread to the distance between the internal thread inner face 5, its difference is 0-0.3mm.
When this durable type superelevation torsional strength tool joint is used, when detaining in the inside and outside tool joint, the outer shoulder 3 of external screw thread at first contacts with the outer shoulder 6 of internal thread, at this moment, the used moment of torsion of last button is born by the outer shoulder of external screw thread and internal thread, external screw thread outer face 4 does not also contact with internal thread inner face 5, and the scope in gap is 0-0.3mm; When torque wrench moment continuation increase, the outer shoulder 6 beginning interference of outer shoulder 3 of external screw thread and internal thread, screw thread also begins interference, and at this moment torque wrench moment is born by external screw thread outer face 4 and internal thread inner face 5, screw thread pair.Along with the continuation increase of torque wrench moment, external screw thread outer face 4 begins to contact with internal thread inner face 5, and a certain amount of interference distortion takes place.When reaching torque wrench moment, the whole moment of torsion of going up in the button process is all partially absorbed by the outer shoulder 3 of external screw thread and the outer shoulder 6 of internal thread, screw thread pair, external screw thread outer face 4 and 5 three of internal thread inner faces.At this moment, the outer face magnitude of interference of externally threaded outer shoulder and internal thread is 0.20-0.80mm, and the magnitude of interference of the interior shoulder of externally threaded outer face and internal thread is 0-0.3mm.
In sum, be preferred embodiment of the present utility model only, be not to be used for limiting practical range of the present utility model, promptly all equivalences of doing according to the content of the utility model claim change and modify, and all should be technology category of the present utility model.
Claims (5)
1. durable type superelevation torsional strength tool joint, it comprises the male connection (1) with the outer shoulder (3) of external screw thread, external thread section (7) and external screw thread outer face (4), and the female adapter (2) with the outer shoulder (6) of internal thread inner face (5), internal thread segment (8) and internal thread; It is characterized in that: the range of taper of described external thread section (7) is that 1:10 is to 1:18; The range of taper of internal thread segment (8) is that 1:10 is to 1:18.
2. durable type superelevation torsional strength according to claim 1 tool joint is characterized in that: tolerance is gone up greater than tolerance on the two ends for 2/5 section in the centre of described external thread section (7) and internal thread segment (8).
3. durable type superelevation torsional strength according to claim 1 and 2 tool joint, it is characterized in that: the external screw thread tooth form (9) of described external thread section (7) and internal thread segment (8) and the tooth form angle of internal thread tooth form (10) are 60 degree, the arc radius scope of Bottom of Thread is 1.0mm-1.27mm, 3.5 tooth/inches.
4. durable type superelevation torsional strength according to claim 1 and 2 tool joint is characterized in that: the outer shoulder (3) of described external screw thread to the distance between the external screw thread outer face (4) greater than the outer shoulder of API male joint external screw thread between the outer face apart from 10-14mm.
5. durable type superelevation torsional strength according to claim 1 and 2 tool joint, it is characterized in that: shoulder (3) is to the distance between the external screw thread outer face (4) outward more than or equal to external screw thread to the distance between the internal thread inner face (5) for the outer shoulder (6) of described internal thread, and its difference is 0-0.3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200644759U CN202039785U (en) | 2011-03-14 | 2011-03-14 | Durable drill pipe joint with ultrahigh torsional strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200644759U CN202039785U (en) | 2011-03-14 | 2011-03-14 | Durable drill pipe joint with ultrahigh torsional strength |
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| Publication Number | Publication Date |
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| CN202039785U true CN202039785U (en) | 2011-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011200644759U Expired - Lifetime CN202039785U (en) | 2011-03-14 | 2011-03-14 | Durable drill pipe joint with ultrahigh torsional strength |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103114816A (en) * | 2013-03-09 | 2013-05-22 | 长沙创远高新机械有限责任公司 | High load drill stem and raise boring machine with the same |
| CN105909185A (en) * | 2016-06-27 | 2016-08-31 | 无锡双马钻探工具有限公司 | Thread structure of drilling rod |
| CN105952390A (en) * | 2016-06-27 | 2016-09-21 | 无锡双马钻探工具有限公司 | Large-torque drill stem thread structure |
| CN107605413A (en) * | 2017-10-23 | 2018-01-19 | 中国石油天然气集团公司管材研究所 | A kind of decision method of petroleum casing pipe round thread tooth form angle |
| CN108166937A (en) * | 2018-03-07 | 2018-06-15 | 上海海隆石油管材研究所 | High torque highly anti-fatigue type nipple |
-
2011
- 2011-03-14 CN CN2011200644759U patent/CN202039785U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103114816A (en) * | 2013-03-09 | 2013-05-22 | 长沙创远高新机械有限责任公司 | High load drill stem and raise boring machine with the same |
| CN105909185A (en) * | 2016-06-27 | 2016-08-31 | 无锡双马钻探工具有限公司 | Thread structure of drilling rod |
| CN105952390A (en) * | 2016-06-27 | 2016-09-21 | 无锡双马钻探工具有限公司 | Large-torque drill stem thread structure |
| CN107605413A (en) * | 2017-10-23 | 2018-01-19 | 中国石油天然气集团公司管材研究所 | A kind of decision method of petroleum casing pipe round thread tooth form angle |
| CN107605413B (en) * | 2017-10-23 | 2019-04-26 | 中国石油天然气集团公司管材研究所 | A kind of determination method of petroleum casing pipe round thread tooth form angle |
| CN108166937A (en) * | 2018-03-07 | 2018-06-15 | 上海海隆石油管材研究所 | High torque highly anti-fatigue type nipple |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111116 |