WO2008103069A1 - Герметичное резьбовое соединение нефтепромысловых труб - Google Patents
Герметичное резьбовое соединение нефтепромысловых труб Download PDFInfo
- Publication number
- WO2008103069A1 WO2008103069A1 PCT/RU2008/000042 RU2008000042W WO2008103069A1 WO 2008103069 A1 WO2008103069 A1 WO 2008103069A1 RU 2008000042 W RU2008000042 W RU 2008000042W WO 2008103069 A1 WO2008103069 A1 WO 2008103069A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pipe
- conical
- male
- thread
- female
- Prior art date
Links
- 238000007789 sealing Methods 0.000 claims abstract description 21
- 230000013011 mating Effects 0.000 claims abstract description 4
- 230000007704 transition Effects 0.000 claims description 3
- 241000134884 Ericales Species 0.000 claims 1
- 238000005452 bending Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 230000009471 action Effects 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002085 persistent effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L15/00—Screw-threaded joints; Forms of screw-threads for such joints
- F16L15/001—Screw-threaded joints; Forms of screw-threads for such joints with conical threads
- F16L15/004—Screw-threaded joints; Forms of screw-threads for such joints with conical threads with axial sealings having at least one plastically deformable sealing surface
Definitions
- the invention relates to the field of construction of oil and gas wells and can be used in casing for technological purposes.
- the tight threaded pipe joint is intended for use in wells that have a high intensity of curvature of the wellbore and / or with difficult operating conditions (high tensile, compressive loads, excessive internal and external pressure, aggressive environment).
- a sealed threaded connection of oilfield pipes including male and female pipes with tapered threads and tapered sealing and thrust surfaces, the first of which are in contact with each other, respectively made on the outer surface of the end portion of the male pipe in the form of a conical surface with a taper towards the axis of this pipe and on the inner surface of the female pipe in the area between the tapered thread and the pipe body, and the second contacting surfaces are made with responsible for the male tube end to form a conical surface with a taper angle in the direction of tapered threads on the pipe end and mating tapered surface on the female pipe provided on a first transition region the conical surface of this pipe to its body (FR patent 2798716, E16L 15/00, published March 23, 2001).
- the specified threaded connection has insufficient tightness due to its design with a small cone angle of thrust conical surfaces, which does not allow to obtain a predetermined interference value for small axial movements of the pipe to be covered, which increases the period from the first contact of the sealing surfaces to the specified interference fit.
- bending deformations occur that disrupt the contact of conical surfaces, leading to depressurization of the threaded joint.
- the present invention is aimed at solving the technical problem of reducing the magnitude of the radial interference in the thread by changing the angle of the support edge of the thread, the formation of structural gaps in the thread along the tops of the profiles, providing additional sealing due to the sealing surface of the male pipe of a spherical shape at the beginning and at the end of the conical zone radial sealing of the end section when changing the angle of the cone.
- the technical result achieved is to increase the reliability and tightness of the joint under conditions of bending deformation; increase the strength of the connection and facilitate its assembly disassembly.
- the specified technical result is achieved in that in a sealed threaded connection of oilfield pipes, including male and female pipes with tapered threads, sealing and thrust surfaces, the first of which, contacting each other in the radial direction, are respectively made on the outer the surface of the end portion of the male and on the inner conical surface of the female pipe in the area between the conical thread and the pipe body, and the second contacting surfaces are respectively made on the male pipe in the form of a conical end surface with a cone angle in the direction of the axis of the conical thread and the mating end conical surface on the female pipe made on the transition area of the first conical surface of this pipe to its body, the profile of the conical thread has a negative angle along the support faces and the height of the thread profile of the male pipe is less than the height of the thread profile of the female pipe, the sealing surface of the male pipe end portion at the beginning and end of the zone of conical radial seal has a spherical shape, a cone angle of 5 ° ⁇ ⁇ 25 °.
- the figure 1 presents a tight threaded connection of oilfield pipes.
- connection includes a male pipe 1 and female pipe 2, which are engaged with each other on a tapered thread 3.
- a stop end 4 of the male pipe 1 and a stop ledge 5 of the female pipe 2 which are made in the form of persistent conical surfaces, and also includes a radial seal zone with outer 6 and inner 7 conical sealing surfaces.
- the outer surface 6 at the beginning of 8 and end 9 of the zone of the conical radial seal has a spherical shape.
- the end face 4 and the ledge 5, as well as the sealing surfaces 6 and 7 interact with each other with a certain tightness and are elements of the main seal, ensuring the tightness of the connection.
- the sealing surfaces 6 and 7 are performed with high accuracy and cleanliness of the treatment of their surfaces.
- a conical thread is used in the connection, the profile of which has a negative angle of the support face ⁇ , and the height of the thread profile of the male pipe 1 is less than the height of the thread profile of the female pipe 2.
- the thread itself does not provide tightness. Its main function is the perception of tensile load and bending and partially - compressive load.
- a metal-metal seal-tight seal is located in front of the thread of the male pipe 1 from the side of the smaller forming cone of the thread and is structurally made in the form of a wedge with an obtuse angle between the generators (stop face 4), which abuts against the reciprocal wedge groove on the cover pipe 2 (stop ledge 5). Due to compaction, the threaded connection acquires the properties of oil-gas-tight, capable of working under the action of combined loads in aggressive environments.
- the cone angle of 5 ° ⁇ ⁇ 25 ° along the end generatrix of the wedge provides a “preload” of the radial seal, which reduces the radial interference, which, in turn, reduces the likelihood of damage to the sealing surfaces and the occurrence of scoring on them.
- the specified angle is increased above 25 degrees, significant deformations of the inner diameter of the enclosing pipe 2 begin to occur when the joint is compressed or twisted.
- the angle decreases below 5 degrees the wedge effect is lost, since the wedge groove of the enclosing pipe 2 becomes more rigid in the axial direction.
- the male 1 and female pipe 2 interact with the thread 3 initially.
- the outer sealing surface b interacts with the sealing surface 7. Due to the diametrical deformations of these surfaces, a metal-metal sealing assembly is created.
- the implementation of the outer sealing surface b at the beginning of 8 and at the end 9 of the zone of contact with the inner surface 7 of a spherical shape makes it easier to screw-unscrew the connection, and under the influence of bending deformations provides additional tightness of the connection.
- the present invention is industrially applicable, because, using well-known technologies used for the manufacture of threaded pipe ends, it can be implemented on a new principle of interaction of contacting surfaces that is fundamentally different from known designs.
- the advantage of the claimed threaded connection in comparison with the prototype is to increase the tightness, increase the strength of the connection and facilitate the work during its Assembly - disassembly
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
- Earth Drilling (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112008000391T DE112008000391T5 (de) | 2007-02-15 | 2008-01-28 | Dichte Gewindeverbindung für Erdölrohre |
CA2678604A CA2678604C (en) | 2007-02-15 | 2008-01-28 | A tight threaded joint of oil field pipes |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
RU2007105764 | 2007-02-15 | ||
RU2007105764/03A RU2338866C1 (ru) | 2007-02-15 | 2007-02-15 | Герметичное резьбовое соединение нефтепромысловых труб |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008103069A1 true WO2008103069A1 (ru) | 2008-08-28 |
Family
ID=39710273
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/RU2008/000042 WO2008103069A1 (ru) | 2007-02-15 | 2008-01-28 | Герметичное резьбовое соединение нефтепромысловых труб |
Country Status (6)
Country | Link |
---|---|
CA (1) | CA2678604C (ru) |
DE (1) | DE112008000391T5 (ru) |
EA (1) | EA012780B1 (ru) |
RU (1) | RU2338866C1 (ru) |
UA (1) | UA94640C2 (ru) |
WO (1) | WO2008103069A1 (ru) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101696621B (zh) * | 2009-11-04 | 2012-05-16 | 天津钢管集团股份有限公司 | 气密封螺纹接头 |
US20120119489A1 (en) * | 2008-04-30 | 2012-05-17 | Shcherbakov Boris Yur Evich | Tightly threaded joint for oil field pipes |
CN104153718A (zh) * | 2014-07-22 | 2014-11-19 | 中国海洋石油总公司 | Bhc快速套管螺纹接头 |
AT17396U1 (de) * | 2020-12-23 | 2022-03-15 | Llc Interpipe Man | Dichte Metallrohrgewindeverbindung |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101806197A (zh) * | 2010-03-26 | 2010-08-18 | 衡阳华菱连轧管有限公司 | 气密封的锯齿形螺纹接头及采用该螺纹接头的油套管和接箍 |
CN102278077A (zh) * | 2011-07-21 | 2011-12-14 | 大庆福斯特科技开发有限公司 | 一种气密封螺纹接头的螺纹结构 |
RU2639343C1 (ru) * | 2016-08-29 | 2017-12-21 | Публичное акционерное общество "Трубная металлургическая компания" (ПАО "ТМК") | Резьбовое соединение обсадных труб |
RU183769U1 (ru) * | 2018-06-05 | 2018-10-02 | Общество С Ограниченной Ответственностью "Тмк-Премиум Сервис" | Резьбовое соединение обсадных труб |
RU185225U1 (ru) * | 2018-07-13 | 2018-11-27 | Акционерное общество "Выксунский металлургический завод" (АО "ВМЗ") | Высокогерметичное муфтовое резьбовое соединение тонкостенных электросварных обсадных труб большого диаметра |
RU2718580C1 (ru) * | 2019-11-12 | 2020-04-08 | Управляющая компания общество с ограниченной ответственностью "ТМС групп" | Газогерметичное резьбовое соединение насосно-компрессорных труб |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU434663A3 (ru) * | 1967-07-20 | 1974-06-30 | Иностранец Жан Луи Альберт Дюре | |
EP0364413A1 (en) * | 1988-10-03 | 1990-04-18 | DALMINE S.p.A. | Hermetic metal pipe joint |
EP0488912A2 (en) * | 1990-11-27 | 1992-06-03 | Vallourec Oil & Gas | Frustoconical screwthread for tubes |
EP0713952A1 (en) * | 1994-11-22 | 1996-05-29 | Sumitomo Chemical Company, Limited | Threaded joint for oil well pipes |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2641767B2 (de) * | 1976-09-14 | 1979-05-31 | Mannesmann Ag, 4000 Duesseldorf | Gewindeverbindung für ölfeldrohre |
AR020495A1 (es) | 1999-09-21 | 2002-05-15 | Siderca Sa Ind & Com | Union roscada de alta resistencia al sobretorque y compresion |
RU2256767C1 (ru) * | 2004-05-06 | 2005-07-20 | Закрытое акционерное общество "Инвест ПромТорг" | Высокогерметичное резьбовое соединение нефтепромысловых труб (варианты) и способы изготовления резьбового соединения этих труб (варианты) |
-
2007
- 2007-02-15 RU RU2007105764/03A patent/RU2338866C1/ru active
- 2007-12-28 EA EA200702676A patent/EA012780B1/ru active IP Right Revival
-
2008
- 2008-01-28 DE DE112008000391T patent/DE112008000391T5/de not_active Withdrawn
- 2008-01-28 CA CA2678604A patent/CA2678604C/en not_active Expired - Fee Related
- 2008-01-28 UA UAA200908368A patent/UA94640C2/ru unknown
- 2008-01-28 WO PCT/RU2008/000042 patent/WO2008103069A1/ru active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU434663A3 (ru) * | 1967-07-20 | 1974-06-30 | Иностранец Жан Луи Альберт Дюре | |
EP0364413A1 (en) * | 1988-10-03 | 1990-04-18 | DALMINE S.p.A. | Hermetic metal pipe joint |
EP0488912A2 (en) * | 1990-11-27 | 1992-06-03 | Vallourec Oil & Gas | Frustoconical screwthread for tubes |
EP0713952A1 (en) * | 1994-11-22 | 1996-05-29 | Sumitomo Chemical Company, Limited | Threaded joint for oil well pipes |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120119489A1 (en) * | 2008-04-30 | 2012-05-17 | Shcherbakov Boris Yur Evich | Tightly threaded joint for oil field pipes |
CN101696621B (zh) * | 2009-11-04 | 2012-05-16 | 天津钢管集团股份有限公司 | 气密封螺纹接头 |
CN104153718A (zh) * | 2014-07-22 | 2014-11-19 | 中国海洋石油总公司 | Bhc快速套管螺纹接头 |
AT17396U1 (de) * | 2020-12-23 | 2022-03-15 | Llc Interpipe Man | Dichte Metallrohrgewindeverbindung |
Also Published As
Publication number | Publication date |
---|---|
CA2678604C (en) | 2016-06-21 |
CA2678604A1 (en) | 2008-08-28 |
EA200702676A1 (ru) | 2008-08-29 |
RU2338866C1 (ru) | 2008-11-20 |
UA94640C2 (ru) | 2011-05-25 |
EA012780B1 (ru) | 2009-12-30 |
DE112008000391T5 (de) | 2010-03-25 |
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