CN107558934A - Extreme line casing thread joint - Google Patents
Extreme line casing thread joint Download PDFInfo
- Publication number
- CN107558934A CN107558934A CN201710929740.7A CN201710929740A CN107558934A CN 107558934 A CN107558934 A CN 107558934A CN 201710929740 A CN201710929740 A CN 201710929740A CN 107558934 A CN107558934 A CN 107558934A
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- male
- shoulder
- thread
- female end
- screw thread
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- 238000007789 sealing Methods 0.000 claims abstract description 32
- 238000007906 compression Methods 0.000 abstract description 6
- 238000003672 processing method Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
Abstract
The invention discloses a kind of extreme line casing thread joint, including symmetrically arranged female end and male end, the female end and male end are respectively equipped with shoulder and sealing surface at screw thread both ends, and screw thread/escape A is arranged between sealing surface and screw thread, and thread bottom is highly less than the sealing surface.Shoulder thickness meets h=(25%~40%) T respectively, and male and female end screw thread is during twist-on, and shoulder is first in contact in male and female end, and after producing certain axial interference, contact takes place in shoulder outside male and female end.The beneficial effects of the invention are as follows：The extreme line casing thread joint uses the design processing method of descending, when meeting h=(25%~40%) T requirement, wall thickness increase at its sealing surface, it is possible to increase and the stability of sealing property, while the anti-compression properties of body can be improved.
Description
Technical field
The present invention relates to petroleum industry field, especially using direct-connected jacket of the descending processing method kind for completion practice
Pipe screw joint.
Background technology
As oil-gas field development is more and more under extreme condition, the also more and more higher of the requirement to oil bushing threaded connector, oil
Field complex geologic conditions, oil gas bury depth, and strata pressure is high, and the difficulty of exploration and development is big.Many wells will before boring up to target zone
The different stratum of more set pressure and lithology is drilled, the generation for situations such as frequently encountering leakage, blowout, necking down, is now generally required
Tripping in sleeve pipe sealing, increase casing program, and the increase of casing program can cause lower part borehole too small, be brought to construction in later period tired
It is difficult, it is possible to bore and cause well to scrap less than target zone.
Under complicated geological environment, conventional Casing Program Design Method can not meet the needs of exploration and development, with
The development of technology, unconventional Casing Program Design Method is gradually widely applied.
Straight-connecting sleeve pipe joint involved in the present invention is to be directed in the Holes of Complicated Wells such as extended horizontal well and directional well to make
, the needs of being mainly used in meeting user special for hole condition gap.The Premium connection is mainly designed to according to user
Particular/special requirement and design, such as：Joint efficiency and anti-collapse property etc..
China Patent No. is that CN201818246 discloses a kind of direct linkage type oil, casing thread connection, can overcome prior art
The defects of middle poor sealing performance, torque resistant poor performance and upper button whard to control, to reach high leakproofness, high torque resistant and conveniently
Above, the advantages of shackle.
China Patent No. is that CN204225791 discloses a kind of direct linkage type special thread structure tubing and casing, has trapezoidal spiral shell
Line and inside and outside sealing surface structure, good well cementation, well workover, antitorque can be effectively played during the secondary development of waste and old well
And simply, rationally, safe and convenient to use with the effect of perforation, double sealing structure can effectively play good sealing effect
Fruit.
China Patent No. is that CN201254957 discloses one kind without coupling straight-connecting sleeve pipe, has trapezoidal thread and moment of torsion
Shoulder.The straight-connecting sleeve pipe is reasonable in design, simple in construction, manufacture easy to process, and constructing operation of going into the well is convenient.
China Patent No. is the direct linkage type oil sleeve joints that disclose of CN201826764, has screw thread, inner sealing surface, interior
Outer shoulder composition, two antitorque shoulders, the anti-twisting property of joint can be improved, the adopting conical surface interference of inner sealing surface, which coordinates, not only seals effect
Fruit is good, while also mitigates the moment of torsion that connection screw thread undertakes, and reduces the damage of connection screw thread, and joint efficiency is high, not thread gluing, extends
The service life of sleeve pipe, reduces production cost.
But all not clear and definite thickness for how determining torque shoulder of above patent, to solve direct linkage type joint sealing performance
The problem of low with incompressible efficiency.
The content of the invention
The technical problems to be solved by the invention are that, for API standard threaded form straight-connecting sleeve pipe, sleeve pipe is multiple
The failure of the forms such as fracture, slippage, leakage easily occurs in miscellaneous hole condition, huge loss is brought to oil field.API standard screw thread
Straight-connecting sleeve pipe, the bonding strength and compression performance of body are all not more than the one of casing pipe name bonding strength and compression performance
Half, therefore it provides it is a kind of using descending Screw thread process method thicken male and female end stand shoulder so as to improve the sealing of body and
The extreme line casing thread joint design of anti-compression properties.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：A kind of extreme line casing thread joint, bag
Including symmetrically arranged female end and male end, the female end and male end are respectively equipped with shoulder, and sealing surface at screw thread both ends, and screw thread rises/
Escape A is arranged between sealing surface and screw thread, and thread bottom is highly less than the sealing surface.
The shoulder includes shoulder in shoulder outside male and female end and male and female end, and thickness meets h=(25%~40%) T respectively,
T in formula：Sleeve pipe nominal wall thickness, h：Shoulder thickness.
Male and female end screw thread is during twist-on, and shoulder is first in contact in male and female end, produces certain axial interference
Afterwards, contact takes place in shoulder outside male and female end.
The nominal length that lost length is detained on the screw thread is ls.
Button loss is negative common difference (0 ,-a) in female end；Button loss is plus tolerance (+a, 0) in male end, wherein 0<a≤0.5.
The male and female screw thread is barb-shaped screw thread.
The pitch of flute profile is the tooth of per inch 4~6, taper 1:10~1:16, a height of 0.8~1.5mm of male thread tooth, female spiral shell
A height of 0.8~the 1.7mm of line tooth.
The beneficial effects of the invention are as follows：The extreme line casing thread joint uses the design processing method of descending, full
During sufficient h=(25%~40%) T requirement, wall thickness increase at its sealing surface, it is possible to increase the stability of sealing property, while energy
Enough improve the anti-compression properties of body.
Brief description of the drawings
Fig. 1 is sleeve pipe female terminal structure schematic diagram of the present invention；
Fig. 2 is sleeve pipe male end structural representation of the present invention；
Fig. 3 is the schematic diagram after the twist-on of male and female end of the present invention.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and detailed description：
As shown in figure 1, a kind of extreme line casing thread joint, including symmetrically arranged female end 1 and male end 6, female end and public affairs
End is respectively equipped with shoulder h and sealing surface at screw thread both ends, and female end 1 includes shoulder 2 in mother, female inner sealing surface 3, female outer shoulder 4, mother
External seal face 5, male end 6 include shoulder 7 in public affairs, public inner sealing surface 8, public outer shoulder 9, public external seal face 10, public outer shoulder thickness
H1, female outer shoulder thickness h 2, is provided with/escape A, using descending processing method, makes sealing surface between screw thread and sealing surface
Height be higher than screw thread cutting point, the structure uses descending processing method, thread forming knife last all over thread when, bottom of the tooth is high
Degree is less than sealing surface, when screwer is close to sealing surface, 25 ° of withdrawings in advance, meet h1=(25%~40%) T, h2=(25%~
40%) T.Shoulder thickness meets h=(25%~40%) T, T in formula：Sleeve pipe nominal wall thickness, h：Shoulder thickness.Male and female end screw thread
During twist-on, shoulder is first in contact in male and female end, and after producing certain axial interference, shoulder takes place outside male and female end
Contact, the sealing and anti-compression properties for making body improve.
Male and female screw thread is barb-shaped screw thread, and flute profile is：The pitch of flute profile is the tooth of per inch 4~6, taper 1:10~1:
16, a height of 0.8~1.5mm of male thread tooth, a height of 0.8~1.7mm of box thread tooth.
The nominal length of the upper button lost length of extreme line casing thread joint is ls, for female end 1, upper button loss
For negative common difference (0 ,-a)；For male end 6, upper button loss is plus tolerance (+a, 0), wherein 0<a≤0.5.
The present invention's is applied to what extreme line casing thread joint design function was realized in：
By taking sleeve design specification 193.68*12.7mm specifications as an example：
As depicted in figs. 1 and 2, described hook tooth thread angle load side angle is -10 °, and introduction side angle is 20 °,
The high Hp=0.80mm of male thread tooth, box thread tooth high Hb=0.85mm, pitch 4.233mm, thread taper 1：12, sealing surface edge
Body axis direction taper is 1：10.Shoulder and axis angle are 90 ° in male and female, and male and female between outer land fillet degree is with axis direction
75°.Public outer shoulder thickness h 1 is 3.8mm, and female outer shoulder thickness h 2 is 3.8mm, and body nominal wall thickness T is 10.54mm, meets h1
The requirement of=(25%~40%) T and h2=(25%~40%) T formula.Upper button lost length ls=120mm, a=0.15mm.
As shown in figure 3, tubing and casing nominal wall thickness is T, h1 is public outer shoulder thickness, and h2 is female outer shoulder thickness.In screw thread
, it is necessary to apply sufficiently large twist-on torque during twist-on, shoulder inside and outside male and female is set mutually to hold out against and produce a certain amount of mistake
It is full of.This is a necessary condition for ensureing the joint gas tightness.Compared with complex hole condition, it is necessary to meet the Anti -collapse of user
Gentle seal request, circular bead surface can undertake larger Overload torque inside and outside the button-type, avoid causing Thread-sticking and close due to crossing torsion
Front cover damage phenomenon, inside and outside double-sealing face can effectively ensure that the infiltration of interior external pressure, ensure the gas tightness under alternate load
Energy.
Claims (7)
1. a kind of extreme line casing thread joint, including symmetrically arranged female end and male end, the female end and male end are in screw thread two
End is respectively equipped with shoulder and sealing surface, it is characterized in that：Screw thread/escape A is arranged between sealing surface and screw thread, and thread
Bottom is highly less than the sealing surface.
2. a kind of extreme line casing thread joint according to claim 1, it is characterized in that：The shoulder is included outside male and female end
Shoulder in shoulder and male and female end, thickness meet h=(25%~40%) T respectively, T in formula：Sleeve pipe nominal wall thickness, h：Shoulder is thick
Degree.
3. a kind of extreme line casing thread joint according to claim 2, it is characterized in that：Male and female end screw thread is in twist-on
During, shoulder is first in contact in male and female end, and after producing certain axial interference, contact takes place in shoulder outside male and female end.
4. a kind of extreme line casing thread joint according to claim 2, it is characterized in that：Lost length is detained on the screw thread
Nominal length be ls.
5. a kind of extreme line casing thread joint according to claim 4, it is characterized in that：Button loss is negative common difference in female end
(0 ,-a)；Button loss is plus tolerance (+a, 0) in male end, wherein 0<a≤0.5.
6. a kind of extreme line casing thread joint according to claim 2, it is characterized in that：The male and female screw thread is barb
Shape screw thread.
7. a kind of extreme line casing thread joint according to claim 2, it is characterized in that：The pitch of flute profile is per inch 4
~6 teeth, taper 1:10~1:16, a height of 0.8~1.5mm of male thread tooth, a height of 0.8~1.7mm of box thread tooth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710929740.7A CN107558934A (en) | 2017-10-09 | 2017-10-09 | Extreme line casing thread joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710929740.7A CN107558934A (en) | 2017-10-09 | 2017-10-09 | Extreme line casing thread joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107558934A true CN107558934A (en) | 2018-01-09 |
Family
ID=60984990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710929740.7A Pending CN107558934A (en) | 2017-10-09 | 2017-10-09 | Extreme line casing thread joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107558934A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109736724A (en) * | 2019-02-18 | 2019-05-10 | 天津钢管集团股份有限公司 | Aluminium alloy tubing and casing air-sealed special threaded joint structure |
| CN111322017A (en) * | 2020-03-31 | 2020-06-23 | 天津钢管制造有限公司 | Enhanced sealing structure of direct-connection sleeve joint |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6347814B1 (en) * | 1999-02-19 | 2002-02-19 | Eni S.P.A. | Integral joint for the connection of two pipes |
| CN2700542Y (en) * | 2004-06-10 | 2005-05-18 | 无锡西姆莱斯石油专用管制造有限公司 | Special casing joint for thermal production well |
| CN202360042U (en) * | 2011-08-18 | 2012-08-01 | 江苏和信石油机械有限公司 | Double shoulder highly anti-twisting drill pipe joint |
| CN203531780U (en) * | 2013-10-11 | 2014-04-09 | 杨林 | Highly-resistant double-circular-bead oil sleeve joint |
| CN104563904A (en) * | 2014-12-31 | 2015-04-29 | 达力普石油专用管有限公司 | Sealing connecting structure of casing of gas well |
| CN105422019A (en) * | 2015-12-09 | 2016-03-23 | 中国石油集团石油管工程技术研究院 | Rapid buckling threaded structure for expansion pipe in large expansion rate and machining and preparing method |
| CN105604499A (en) * | 2014-11-19 | 2016-05-25 | 宝山钢铁股份有限公司 | A direct connection type double-step threaded joint |
| CN105672904A (en) * | 2016-04-01 | 2016-06-15 | 西南石油大学 | Directly-connected hermetically sealed sleeve for high temperature and high pressure ultra-deep well |
| CN205577875U (en) * | 2016-04-25 | 2016-09-14 | 中国石油集团西部钻探工程有限公司 | Doublestage threaded connection device |
| JP2017072187A (en) * | 2015-10-07 | 2017-04-13 | Ｊｆｅスチール株式会社 | Screw joint for oil well pipe casing |
| CN107002471A (en) * | 2014-12-19 | 2017-08-01 | 瓦卢瑞克石油天然气法国有限公司 | Threaded connector |
| CN207278202U (en) * | 2017-10-09 | 2018-04-27 | 天津钢管集团股份有限公司 | Extreme line casing thread connector |
-
2017
- 2017-10-09 CN CN201710929740.7A patent/CN107558934A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6347814B1 (en) * | 1999-02-19 | 2002-02-19 | Eni S.P.A. | Integral joint for the connection of two pipes |
| CN2700542Y (en) * | 2004-06-10 | 2005-05-18 | 无锡西姆莱斯石油专用管制造有限公司 | Special casing joint for thermal production well |
| CN202360042U (en) * | 2011-08-18 | 2012-08-01 | 江苏和信石油机械有限公司 | Double shoulder highly anti-twisting drill pipe joint |
| CN203531780U (en) * | 2013-10-11 | 2014-04-09 | 杨林 | Highly-resistant double-circular-bead oil sleeve joint |
| CN105604499A (en) * | 2014-11-19 | 2016-05-25 | 宝山钢铁股份有限公司 | A direct connection type double-step threaded joint |
| CN107002471A (en) * | 2014-12-19 | 2017-08-01 | 瓦卢瑞克石油天然气法国有限公司 | Threaded connector |
| CN104563904A (en) * | 2014-12-31 | 2015-04-29 | 达力普石油专用管有限公司 | Sealing connecting structure of casing of gas well |
| JP2017072187A (en) * | 2015-10-07 | 2017-04-13 | Ｊｆｅスチール株式会社 | Screw joint for oil well pipe casing |
| CN105422019A (en) * | 2015-12-09 | 2016-03-23 | 中国石油集团石油管工程技术研究院 | Rapid buckling threaded structure for expansion pipe in large expansion rate and machining and preparing method |
| CN105672904A (en) * | 2016-04-01 | 2016-06-15 | 西南石油大学 | Directly-connected hermetically sealed sleeve for high temperature and high pressure ultra-deep well |
| CN205577875U (en) * | 2016-04-25 | 2016-09-14 | 中国石油集团西部钻探工程有限公司 | Doublestage threaded connection device |
| CN207278202U (en) * | 2017-10-09 | 2018-04-27 | 天津钢管集团股份有限公司 | Extreme line casing thread connector |
Non-Patent Citations (1)
| Title |
|---|
| 张忠铧: "宝钢油井管产品使用手册", 上海：上海交通大学出版社, pages: 77 - 96 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109736724A (en) * | 2019-02-18 | 2019-05-10 | 天津钢管集团股份有限公司 | Aluminium alloy tubing and casing air-sealed special threaded joint structure |
| CN111322017A (en) * | 2020-03-31 | 2020-06-23 | 天津钢管制造有限公司 | Enhanced sealing structure of direct-connection sleeve joint |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20190703 Address after: No. 396 Jintang Highway, Dongli District, Tianjin 300301 Applicant after: Tianjin Steel Tube Manufacturing Co.,Ltd. Address before: No. 396 Jintang Highway, Dongli District, Tianjin 300301 Applicant before: TIANJIN PIPE (GROUP) Corp. |
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180109 |