CN103643900A - Direct-connection variable-thread-width petroleum tubing threads - Google Patents
Direct-connection variable-thread-width petroleum tubing threads Download PDFInfo
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- CN103643900A CN103643900A CN201310575164.2A CN201310575164A CN103643900A CN 103643900 A CN103643900 A CN 103643900A CN 201310575164 A CN201310575164 A CN 201310575164A CN 103643900 A CN103643900 A CN 103643900A
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Abstract
The invention relates to direct-connection variable-thread-width petroleum tubing threads which comprise a tube body. The direct-connection variable-thread-width petroleum tubing threads are characterized in that internal threads and external threads are directly machined at the two ends of the tube body respectively, both the internal thread and the external threads are taper threads, the taper of the taper threads is 1:(15+/-0.1), the thread tops of the internal threads and the external threads become wider and wider from the end faces to the interior, but the thread bottoms of the internal threads and the external threads become narrower and narrower from the end faces to the interior; an external thread transition conical surface is machined on the outer wall of the pipe body on the inner side of the external threads, and an arc transition surface and an internal thread transition conical surface are sequentially machined on the inner wall of the pipe body on the inner side of the internal threads; the taper of the external thread transition conical surface and the taper of the internal thread transition conical surface are 1:(4+/-1); the arc transition surface is a R(20+/-5)mm arc surface. The direct-connection variable-thread-width petroleum tubing threads are applicable to petroleum tubing of the specification from 2-3/8 inches to 13-3/8 inches; the conical sealing face design is adopted for the threads, so that the sealing effect is better; moreover, the non-coupling mode is adopted, the size of a well hole can be reduced in the well driving process, the utilization rate of the well hole is improved, protruding barriers do not exist on both the inner wall and the outer wall, and the resistance to descending in a well is reduced.
Description
Technical field
The present invention relates to the connecting thread of the pipes such as oil exploitation industry oil pipe, sleeve pipe, be specially a kind of direct linkage type and become the wide OCTG screw thread of tooth.
Background technology
In the sleeve pipe connecting thread that oil exploitation industry is used at present, most API 5B standard threads that adopt American Petroleum Institute, the thread seal effect designing in this standard is undesirable, be not suitable for tightness is required to high occasion, and existing connected mode mostly is coupling type connected mode, connected mode is complicated, loaded down with trivial details, and because the diameter of box cupling need to be greater than the diameter of tubing, therefore borehole diameter during drilling well must be greater than the diameter of box cupling, cause the utilization rate of well low, in addition the borehole wall easily bumps and stops that tubing moves in well with outstanding box cupling, cause lower well resistance larger.
Summary of the invention
Object of the present invention is exactly the defect existing for prior art, provide a kind of easy to connect, air-tightness is good without coupling straight-connecting, becomes the wide OCTG screw thread of tooth.
Technical scheme of the present invention is: comprise body, two ends of described body directly process respectively internal and external screw thread, described internal and external screw thread is taper thread, and the tapering of taper thread is 1:(15 ± 0.1), and internal and external screw thread from end face inwards crest all broaden gradually, all narrow down gradually at the bottom of tooth; On the tube wall of described external screw thread inner side, be processed with the external screw thread transition conical surface, on the inboard wall of tube body of described internal thread inner side, be processed with successively arc-shaped transitional surface and the internal thread transition conical surface; The tapering of the described external screw thread transition conical surface and the internal thread transition conical surface is 1:(4 ± 1); Described arc-shaped transitional surface is R20 ± 5mm arc surface.
Such scheme is further improved to:
The width of described internal and external screw thread crest by end face inwards each pitch increase successively 0.2-0.4mm, the width at the bottom of internal and external screw thread tooth by end face inwards each pitch reduce successively 0.2-0.4mm.
The benchmark pitch of described internal and external screw thread is 6.0 ± 0.02mm.
The tooth side angle of described internal and external screw thread thread form both sides is-3 ° ± 30 '.
Described internal and external screw thread load side tooth is high is 0.8 ± 0.1mm, and parallel with the axis of whole screw thread at the bottom of crest and tooth.
The present invention is applicable to 2-3/8 inch to the OCTG of 13-3/8 inch specification, and it adopts conical seal (contact) face design, makes sealing effectiveness better; And adopt without box cupling form, the two ends of tubing are without thickening, directly at one end of tubing machining internal thread other end threading, tubing directly docks with tubing, this borehole size can reduce drilling well without box cupling structure time, improve the utilization rate of well, and inside and outside wall is all without outstanding obstacle, reduces lower well resistance.
Accompanying drawing explanation
Fig. 1 is the connection diagram of an embodiment of the present invention;
Fig. 2 is the partial enlarged drawing that becomes the wide thread fiting part of tooth in Fig. 1;
Wherein: 1, body male end, 2, the external screw thread transition conical surface, 3, body female end, 4, become the wide thread fiting part of tooth, 5, arc-shaped transitional surface, 6, the internal thread transition conical surface.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is described further.
Referring to Fig. 1-2, a kind of direct linkage type becomes the wide OCTG screw thread of tooth, the two ends of body are machined directly to body male end 1 and body female end 3, the internal and external screw thread of body female end 3 and body male end 1 is taper thread, the tapering of taper thread is 1:(15 ± 0.1), (tapering data be two variable quantities on survey mark diameter and the ratio of axial distance); Internal and external screw thread from end face inwards crest all broaden gradually, all narrow down gradually at the bottom of tooth, be preferably designed for: the width of internal and external screw thread crest by end face inwards each pitch increase successively 0.2-0.4mm, the width at the bottom of internal and external screw thread tooth by end face inwards each pitch reduce successively 0.2-0.4mm.On the tube wall of external screw thread inner side, be processed with the external screw thread transition conical surface 2, on the inboard wall of tube body of internal thread inner side, be processed with successively arc-shaped transitional surface 5 and the internal thread transition conical surface 6.The tapering of the external screw thread transition conical surface 2 and the internal thread transition conical surface 6 is 1:(4 ± 1); Arc-shaped transitional surface 5 is R20 ± 5mm arc surface.The benchmark pitch of internal and external screw thread is 6.0 ± 0.02mm.The tooth side angle of internal and external screw thread thread form both sides is all preferably-3 ° ± 30 '.Internal and external screw thread load side tooth is high is 0.8 ± 0.1mm, and parallel with the axis of whole screw thread at the bottom of crest and tooth.
When sleeve pipe or oil pipe connection, tooth is wide is threaded togather (forming the wide thread fiting part 4 of change tooth in figure) by becoming for the body male end 1 of two bodys that directly will dock and body female end 3.
Claims (5)
1. a direct linkage type becomes the wide OCTG screw thread of tooth, comprise body, it is characterized in that: two ends of described body directly process respectively internal and external screw thread, described internal and external screw thread is taper thread, the tapering of taper thread is 1:(15 ± 0.1), and internal and external screw thread from end face inwards crest all broaden gradually, all narrow down gradually at the bottom of tooth; On the tube wall of described external screw thread inner side, be processed with the external screw thread transition conical surface, on the inboard wall of tube body of described internal thread inner side, be processed with successively arc-shaped transitional surface and the internal thread transition conical surface; The tapering of the described external screw thread transition conical surface and the internal thread transition conical surface is 1:(4 ± 1); Described arc-shaped transitional surface is R20 ± 5mm arc surface.
2. direct linkage type according to claim 1 becomes the wide OCTG screw thread of tooth, it is characterized in that: the width of described internal and external screw thread crest by end face inwards each pitch increase successively 0.2-0.4mm, the width at the bottom of internal and external screw thread tooth by end face inwards each pitch reduce successively 0.2-0.4mm.
3. direct linkage type according to claim 2 becomes the wide OCTG screw thread of tooth, it is characterized in that: the benchmark pitch of described internal and external screw thread is 6.0 ± 0.02mm.
4. direct linkage type according to claim 3 becomes the wide OCTG screw thread of tooth, it is characterized in that: the tooth side angle of described internal and external screw thread thread form both sides is-3 ° ± 30 '.
5. direct linkage type according to claim 4 becomes the wide OCTG screw thread of tooth, it is characterized in that: the high 0.8 ± 0.1mm of being of described internal and external screw thread load side tooth, and parallel with the axis of whole screw thread at the bottom of crest and tooth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310575164.2A CN103643900A (en) | 2013-11-18 | 2013-11-18 | Direct-connection variable-thread-width petroleum tubing threads |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310575164.2A CN103643900A (en) | 2013-11-18 | 2013-11-18 | Direct-connection variable-thread-width petroleum tubing threads |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103643900A true CN103643900A (en) | 2014-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310575164.2A Pending CN103643900A (en) | 2013-11-18 | 2013-11-18 | Direct-connection variable-thread-width petroleum tubing threads |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200961451Y (en) * | 2006-07-11 | 2007-10-17 | 天津钢管集团有限公司 | Tooth breadth variable inverse trapezia bush screw connection structure |
| US20120025522A1 (en) * | 2009-04-17 | 2012-02-02 | Sumitomo Metal Industries, Ltd. | Tubular component for drilling and operating hydrocarbon wells, and resulting threaded connection |
| CN202391353U (en) * | 2011-12-16 | 2012-08-22 | 贵州高峰石油机械股份有限公司 | Non-collar connection thread for petroleum oil pipe and casing |
| CN103362451A (en) * | 2013-08-03 | 2013-10-23 | 无锡西姆莱斯石油专用管制造有限公司 | Non-coupling good-sealing bending-resistant tooth-width-variable wedge type threaded oil well pipe structure |
| CN103362459A (en) * | 2013-08-03 | 2013-10-23 | 无锡西姆莱斯石油专用管制造有限公司 | Arc-shaped conical surface sealed variable tooth wide wedge-type coupling structure and oil well pipe structure |
| CN203547567U (en) * | 2013-11-18 | 2014-04-16 | 东营海润钢管集团有限公司 | Direct connection type variable thread width oil pipe threads |
-
2013
- 2013-11-18 CN CN201310575164.2A patent/CN103643900A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200961451Y (en) * | 2006-07-11 | 2007-10-17 | 天津钢管集团有限公司 | Tooth breadth variable inverse trapezia bush screw connection structure |
| US20120025522A1 (en) * | 2009-04-17 | 2012-02-02 | Sumitomo Metal Industries, Ltd. | Tubular component for drilling and operating hydrocarbon wells, and resulting threaded connection |
| CN202391353U (en) * | 2011-12-16 | 2012-08-22 | 贵州高峰石油机械股份有限公司 | Non-collar connection thread for petroleum oil pipe and casing |
| CN103362451A (en) * | 2013-08-03 | 2013-10-23 | 无锡西姆莱斯石油专用管制造有限公司 | Non-coupling good-sealing bending-resistant tooth-width-variable wedge type threaded oil well pipe structure |
| CN103362459A (en) * | 2013-08-03 | 2013-10-23 | 无锡西姆莱斯石油专用管制造有限公司 | Arc-shaped conical surface sealed variable tooth wide wedge-type coupling structure and oil well pipe structure |
| CN203547567U (en) * | 2013-11-18 | 2014-04-16 | 东营海润钢管集团有限公司 | Direct connection type variable thread width oil pipe threads |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140319 |