CN103670293A - Drilling rod with inner stress release groove - Google Patents
Drilling rod with inner stress release groove Download PDFInfo
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- CN103670293A CN103670293A CN201310699340.3A CN201310699340A CN103670293A CN 103670293 A CN103670293 A CN 103670293A CN 201310699340 A CN201310699340 A CN 201310699340A CN 103670293 A CN103670293 A CN 103670293A
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- diameter
- thread connector
- drilling rod
- wall
- section
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- 238000005553 drilling Methods 0.000 title claims abstract description 37
- 238000003466 welding Methods 0.000 claims abstract description 8
- 210000003238 esophagus Anatomy 0.000 claims description 11
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 210000001503 joint Anatomy 0.000 abstract 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- 230000035882 stress Effects 0.000 description 34
- 230000000694 effects Effects 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 102000000584 Calmodulin Human genes 0.000 description 1
- 108010041952 Calmodulin Proteins 0.000 description 1
- 241001274660 Modulus Species 0.000 description 1
- 206010042209 Stress Diseases 0.000 description 1
- 230000002929 anti-fatigue Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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- Earth Drilling (AREA)
Abstract
The invention discloses a drilling rod with an inner stress release groove. The drilling rod comprises an inner thread connector, a pipe body and an outer thread connector. The finished product inner thread connector and the outer thread connector are respectively in butt welding with the pipe body, and the joint parts form welding joints. The inner thread connector and the outer thread connector are both of a reducing pipe structure. The end, of a threaded structure, of the inner thread connector and the end, of a threaded structure, of the outer thread connector are large-diameter section. The outer wall of each large-diameter section is connected to a welding neck section with relatively small diameter via a taper pipe. The diameter of the outer wall of the circular-tube-shaped weld neck section and the diameter of the inner hole of the circular-tube-shaped weld neck section are respectively equal to the outer diameter of the end face of a butt joint pipe body and the size of an inner hole. In order to prevent inner stress generated by sudden thickness of the wall of the inner thread connector or the outer thread connector from being transmitted to the tube body, a concave circular-arc-shaped stress release groove around the outer wall is formed in the middle of the axial direction of the weld neck section. The stress release groove is simple in structure, easy to manufacture, remarkable in reduction of inner stress, favorable to improving the strength of the drilling, and capable of reducing fatigue damage possibility.
Description
Technical field
The present invention relates to a kind of structure design that slows down drilling rod internal stress, specifically, the present invention relates to a kind ofly by setting up stress relief grooves structure, improve drilling rod intensity.
Background technology
In the last hundred years, after the mankind are to petroleum resources excessive exploitation, land has the day by day exhaustion of shallow oil-gas Layer resource that business development is worth.Current oil crisis has become one of factor of restriction development of world economy, and it is necessary behave that petroleum resources are risen to national strategy resource.Various countries want to obtain more petroleum resources, except strengthening the oil drilling degree of depth, seek exactly to develop deep-sea oil.The precondition that realizes above-mentioned target is to be equipped with the drilling rod that bores deep-well.The increase of the oil drilling degree of depth, supporting drilling rod bears moment of torsion and also strengthens thereupon, therefore more and more higher to the design strength index request of drilling rod.The manufacture of high-strength drill pipe depends primarily on material, is secondly structure design, and after material decision, structure design just seems very important.Drilling rod main component is body, and female adapter is connected with body two ends by welding respectively with male connection.Through the drilling rod of welding forming, mainly there is the internal stress of two broad aspect, the one, there is very large internal stress in butt weld and heat affected zone thereof, although this internal stress can after heat treatment in significantly reduction, still have internal stress residue.Internal stress on the other hand derives from two ends of drill junction, because caliber changes greatly, in caliber Sudden change region, there is larger internal stress, because internal stress has stronger destructiveness in junction, add drilling rod and when drilling well, transmit wholesale moment of torsion, internal stress is easily brought out drilling rod fatigue damage.Once there is this type of accident, must bring huge economic loss, so drilling rod is manufactured commercial city in the technical scheme of making great efforts to seek to improve drilling rod intensity.
Summary of the invention
The problem that the present invention exists larger internal stress and discharges nowhere mainly for drilling rod internal and external screw thread joint and body calmodulin binding domain CaM, a kind of drilling rod that is provided with internal stresses release groove is proposed, this drilling rod weldering cervical part of esophagus arrange internal stresses release groove rational in infrastructure, make easily, can discharge internal stress nearby, thereby reach the object that strengthens drilling rod intensity.
The present invention is achieved through the following technical solutions technical goal.
Be provided with the drilling rod of internal stresses release groove, described drilling rod comprises female adapter, body and male connection, and finished product female adapter and male connection generate weld seam with body butt welding respectively.Described female adapter and male connection are reducer pipe structure, and the one end that has helicitic texture is enlarged diameter section, and enlarged diameter section outer wall is transitioned into by Taper Pipe the weldering cervical part of esophagus that diameter is relatively little, the weldering cervical part of esophagus outer diameter D of circular tube shaped
owith diameter of bore D
iequal respectively to dock body end face external diameter and interior hole dimension.Its improvements are: at weldering cervical part of esophagus, be axially provided with the stress relief grooves that encircles outer wall indent in middle part.
In said structure, stress relief grooves axial cross section is circular arc, and its radius of curvature is R
1=31.8mm～38.1mm, indent degree of depth T=2.1mm～6.3mm, radius R is passed through on both sides
2the arc transition of=6.35mm～12.7mm is to weldering neck both sides outer wall, at stress relief grooves minimum diameter D
gon place's cross section, it is 1.7～2.2 that slot cross-section amasss with the ratio that welds the wall thickness G sectional area of neck remainder.
The present invention compared with prior art, has following good effect:
1, on weldering neck outer wall, make stress relief grooves easy, increase hardly cost of production;
2, on weldering neck, set up shallow stress relief grooves, although reduced some section moduluses, significantly increase the elasticity of weldering neck, directly slow down the internal stress of joint to body transmission, be conducive to improve drilling rod intensity, improve drilling rod anti-fatigue performance, reduce the fracture accident producing because of internal stress problem.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is Fig. 1 A place stress relief grooves partial structurtes enlarged diagram.
The specific embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, the invention will be further described.
Shown in Fig. 1, be provided with the drilling rod of internal stresses release groove, described drilling rod is for deep sea drilling, it comprises female adapter 1, body 2 and male connection 3, female adapter 1 and male connection 3 are finished parts, adopt friction welding technology respectively female adapter 1 and male connection 3 to be linked into an integrated entity with body 2 two ends, fusion area generates weld seam 4.Described female adapter 1 and male connection 3 are reducer pipe structure, and the one end that has helicitic texture is enlarged diameter section, and enlarged diameter section outer wall is transitioned into by Taper Pipe 5 the weldering cervical part of esophagus 7 that diameter is relatively little.Weldering cervical part of esophagus 7 is circular tube shaped, its outer diameter D
owith diameter of bore D
iequal respectively to dock body 2 end face external diameters and interior hole dimension.Female adapter 1 and male connection 3 are because of wall thickness sudden change generation internal stress, and weld seam 4 residual internal stress after heat treatment all has destructiveness, in order to slow down these internal stresss, to body 2, bring side effect, the present invention is axially provided with the stress relief grooves 6 that encircles outer wall indent in middle part at the weldering cervical part of esophagus 7 of female adapter 1 and male connection 3.Earth pressure release groove 6 shape and size are most important.Stress relief grooves 6 axial cross sections in the present invention are circular arc, and its size will be determined according to supporting drilling rod specification, and undersized not having should have effect, excessive intensity of losing supporting drilling rod.Its safety factor is with stress relief grooves 6 minimum diameter D
gthe cross section at place is benchmark examination, as long as slot cross-section is long-pending and the ratio of the wall thickness G sectional area of weldering cervical part of esophagus 7 remainders is security configuration between 1.7～2.2, within the scope of this, value all can effectively slow down the transmission of internal stress, guarantees drilling rod safe handling.The concrete size of relevant stress relief grooves 6, further illustrates below by embodiment.
Different size drilling rod configuration stress groove embodiment table
Claims (2)
1. be provided with a drilling rod for internal stresses release groove, described drilling rod comprises female adapter (1), body (2) and male connection (3), and finished product female adapter (1) and male connection (3) generate weld seam (4) with body (2) butt welding respectively; Described female adapter (1) and male connection (3) are reducer pipe structure, the one end that has helicitic texture is enlarged diameter section, enlarged diameter section outer wall is transitioned into by Taper Pipe (5) the weldering cervical part of esophagus (7) that diameter is relatively little, weldering cervical part of esophagus (7) the outer diameter D of circular tube shaped
owith diameter of bore D
iequal respectively to dock body (2) end face external diameter and interior hole dimension; It is characterized in that: at weldering cervical part of esophagus (7), be axially provided with the stress relief grooves (6) that encircles outer wall indent in middle part.
2. the drilling rod that is provided with internal stresses release groove according to claim 1, is characterized in that: described stress relief grooves (6) axial cross section is circular arc, and its radius of curvature is R
1=31.8mm～38.1mm, indent degree of depth T=2.1mm～6.3mm, radius R is passed through on both sides
2the arc transition of=6.35mm～12.7mm is to weldering neck (7) both sides outer wall, at stress relief grooves (6) minimum diameter D
gon place's cross section, slot cross-section ratio long-pending and the wall thickness G sectional area that weldering neck (7) is remaining is 1.7～2.2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310699340.3A CN103670293A (en) | 2013-12-19 | 2013-12-19 | Drilling rod with inner stress release groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310699340.3A CN103670293A (en) | 2013-12-19 | 2013-12-19 | Drilling rod with inner stress release groove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103670293A true CN103670293A (en) | 2014-03-26 |
Family
ID=50308983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310699340.3A Pending CN103670293A (en) | 2013-12-19 | 2013-12-19 | Drilling rod with inner stress release groove |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103670293A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105239930A (en) * | 2015-10-13 | 2016-01-13 | 成都聚智工业设计有限公司 | Protective petroleum drill rod |
| CN110500044A (en) * | 2019-09-27 | 2019-11-26 | 衡阳华菱钢管有限公司 | The nipple of antifatigue casing |
| CN112846460A (en) * | 2021-01-07 | 2021-05-28 | 辽宁石油化工大学 | Stress-reducing welding method for repairing metal pipeline on site |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2929145Y (en) * | 2006-04-21 | 2007-08-01 | 中国石油天然气股份有限公司 | Drill rod joint stress reducing structure |
| CN202194588U (en) * | 2011-08-17 | 2012-04-18 | 中国石油天然气集团公司 | Drill rod |
| US20130313025A1 (en) * | 2011-03-14 | 2013-11-28 | Thein Htung Aung | Integral wear pad and method |
| CN103452492A (en) * | 2013-09-24 | 2013-12-18 | 上海海隆石油管材研究所 | Forming method of drill pipe high station structure for rapid raising and dropping drill and drill pipe |
| CN203626633U (en) * | 2013-12-19 | 2014-06-04 | 江苏曙光华阳钻具有限公司 | Drill rod with internal stress release grooves |
-
2013
- 2013-12-19 CN CN201310699340.3A patent/CN103670293A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2929145Y (en) * | 2006-04-21 | 2007-08-01 | 中国石油天然气股份有限公司 | Drill rod joint stress reducing structure |
| US20130313025A1 (en) * | 2011-03-14 | 2013-11-28 | Thein Htung Aung | Integral wear pad and method |
| CN202194588U (en) * | 2011-08-17 | 2012-04-18 | 中国石油天然气集团公司 | Drill rod |
| CN103452492A (en) * | 2013-09-24 | 2013-12-18 | 上海海隆石油管材研究所 | Forming method of drill pipe high station structure for rapid raising and dropping drill and drill pipe |
| CN203626633U (en) * | 2013-12-19 | 2014-06-04 | 江苏曙光华阳钻具有限公司 | Drill rod with internal stress release grooves |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105239930A (en) * | 2015-10-13 | 2016-01-13 | 成都聚智工业设计有限公司 | Protective petroleum drill rod |
| CN110500044A (en) * | 2019-09-27 | 2019-11-26 | 衡阳华菱钢管有限公司 | The nipple of antifatigue casing |
| CN110500044B (en) * | 2019-09-27 | 2024-02-09 | 衡阳华菱钢管有限公司 | Threaded joint of anti-fatigue sleeve |
| CN112846460A (en) * | 2021-01-07 | 2021-05-28 | 辽宁石油化工大学 | Stress-reducing welding method for repairing metal pipeline on site |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Application publication date: 20140326 |