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WO2016064368A1 - Raccord fileté étanche pour tubes métalliques - Google Patents

Raccord fileté étanche pour tubes métalliques Download PDF

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Publication number
WO2016064368A1
WO2016064368A1 PCT/UA2015/000028 UA2015000028W WO2016064368A1 WO 2016064368 A1 WO2016064368 A1 WO 2016064368A1 UA 2015000028 W UA2015000028 W UA 2015000028W WO 2016064368 A1 WO2016064368 A1 WO 2016064368A1
Authority
WO
WIPO (PCT)
Prior art keywords
conical
pipe
sealing surface
thrust
male
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/UA2015/000028
Other languages
English (en)
Russian (ru)
Inventor
Олег Игоревич РОЗЕНБЕРГ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
"interpipe Management" LLC
Original Assignee
"interpipe Management" LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by "interpipe Management" LLC filed Critical "interpipe Management" LLC
Publication of WO2016064368A1 publication Critical patent/WO2016064368A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • E21B17/08—Casing joints
    • 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

Definitions

  • the invention relates to the production of pressurized threaded joints of metal pipes in the oil and gas industry, which can be used for installation of casing or oilfield pipes in the construction of oil and gas wells.
  • One of the ways to increase the tightness of a threaded connection is to select the optimal layout and select the optimal ratio of the geometric parameters of the elements of the threaded pipe joint.
  • One of the solutions provided for improving the sealing properties of pipe joints for oil and gas is a metal-to-metal seal located at different points of the pipe joint, depending on the chosen joint design.
  • This type of seal in the threaded connection provides a barrier to gas or liquid pressure, while the thread is provided mainly to match mechanical requirements and characteristics during the descent of pipes into the well and during drilling.
  • cone-cone metal-metal seal including a truncated cone-shaped external sealing surface located at the end of a male connection member that is in contact with a corresponding truncated cone-shaped sealing surface located on the female connection member.
  • the taper of the sealing surfaces of the inner and outer elements is made in the range of 6.25-9.25% relative to the axis of the connection, and the length of the surface of the inner element in contact with the corresponding surface of the outer element is 0.5-2.5 mm.
  • a protrusion with a conical seating surface is made on the end part of the inner element, and a mating socket is made on the end part of the outer element with the surface reciprocal indicated, the taper angle being 5-10 ° to the plane perpendicular to the connection axis.
  • RESPONSIBILITY “TMK-PREMIUM SERVICE, RU) ⁇ 21 ⁇ 17/042; 12/30/2009] [2], 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 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.
  • 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 a mating end conical surface on the female pipe made in the transition section of the first conical surface of this pipe to its body.
  • the profile of the conical thread has a negative angle along the reference face, 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 end portion of the male pipe at the beginning and at the end of the zone of the conical radial seal has a spherical shape, and the cone angle of 5 ° is 25 °.
  • a common drawback of these known sealed threaded joints of metal pipes [1,2] with cone-cone sealing surfaces is that the surface length of the inner element in contact with the corresponding surface of the outer element is insignificant, 0.5-2.5 mm, which is not provides a reliable barrier to gas or liquid pressure, which reduces its tightness and reliability in operation.
  • the cone-to-conoid type seal is more progressive than the cone-cone seal, including a truncated cone-shaped sealing surface located at the end of a female pipe joint member that is in contact with a corresponding toroid-shaped sealing surface located on male tubular connection element.
  • the sealing surface of the female element is conical
  • the sealing surface of the male element is made of a toroidal radius of 150 mm and 250 mm for pipes with an outer diameter of 60.3 mm to 1 14.3 mm.
  • the thrust surfaces of the female and male pipe elements are perpendicular to the longitudinal axis of the joint.
  • the closest in purpose and number of common features is a hermetic threaded connection of metal pipes formed by threaded end sections, respectively, with internal and external thrust conical threads of two coaxially arranged, covering and covered pipes, and contacting sealing and thrust surfaces, of which the sealing surface of the covering pipe is made conical, the sealing surface of the male pipe is made toroidal, and the thrust surfaces are female the connecting and male pipes are made conical with a negative angle ⁇ of taper to a plane perpendicular to the longitudinal axis X of the connection, the male pipe being made with an additional cylindrical surface mating with a toroidal sealing surface on one side and with a threaded end section on the other side ["THREADED TUBE JOINT "EP 1540227B 1 (EA007076B1) (TENARIS CONNECTIONS AG, LI) F16L 15/06; 12.12.2007, the closest analogue is the prototype] [4].
  • the radius of the toroidal sealing surface is in the range from 30 to 100 mm when the outer diameter of the pipe is more than 140 mm, and is in the range from 30 to 70 mm when the outer diameter of the pipe is not more than 140 mm.
  • the male pipe has a frustoconical contact surface at the front end that forms an angle ⁇ comprised between (-) 1 ° and (-) 5 ° with respect to a plane perpendicular to the longitudinal axis X of the joint.
  • the main disadvantage of the known compound [4] is that the contact length "b" on the conical and toroidal sealing surfaces of the female and male pipes in which the pressure of the sealing contact in the known compound occurs is selected to be 0.5 mm.
  • the overlap area At the time of application of maximum tensile loads on the sealing section, the overlap area will be minimal.
  • the overlap area must be at least:
  • E is the modulus of elasticity of the material
  • R is the radius of the sealing surface of the covered pipe, mm
  • D is the diameter of the male pipe at the point of contact of the sealing surfaces, mm;
  • F is the force exerted on the conical sealing portion of the female pipe, kN;
  • d is the penetration depth of the toroidal surface into the elastic half-space, mm.
  • the contact length of the sealing surfaces of the covering and covered pipes should be at least 2 mm.
  • the technical result that is achieved by solving the technical problem and using an improved pipe threaded connection is to increase the length of the contact zone of the toroidal sealing surface of the male pipe in contact with the conical sealing surface of the female pipe to 2-7 mm and increasing the tightness of the connection, which significantly increases the reliability its in operation.
  • the nominal overlap area which ensures guaranteed tightness in the connection, is calculated according to the formula determined by the applicant, which includes only the geometric parameters of the connection:
  • R is the radius of the toroidal sealing surface of the male pipe, mm; a is the angle between the radius drawn to the central overlap point of the toroidal sealing surface of the male pipe and the radius drawn to the boundary point of contact of the contact of the toroidal sealing surface of the male pipe with the conical sealing surface of the female pipe; degree (°);
  • ⁇ is the angle between the plane of the conical sealing surface of the enclosing pipe and the chord drawn from the contact point of contact between the toroidal sealing surface of the enclosed pipe and the conical sealing surface of the enclosing pipe to the central overlap point of the toroidal sealing surface of the enclosing pipe, degree (°).
  • the length of the contact zone b is:
  • connection At the same time, optimal contact stresses arise in the connection, which create a reliable barrier to the pressure of gas or liquid in the connection and provide high tightness of the connection, but do not lead to the destruction of the contacting conical and toroidal sealing surfaces of the female and male pipes.
  • the proposed hermetic threaded connection of metal pipes, according to the invention has additional differences that increase or create an additional technical result.
  • the thrust surfaces are conical with a negative angle ⁇ of taper (-) 10 ° ⁇ ⁇ (-) 20 ° to the plane perpendicular to the longitudinal axis X of the joint.
  • the conical sealing surface and the conical thrust surface are conjugated by a radius transition made by a radius
  • R4 0.9 " 'mm
  • R 5 1.0 +0 ' 2 mm
  • the threaded end sections, respectively, with the external and internal thrust conical threads are made with a taper angle of 5.25 - 8.25% to the longitudinal axis X of the connection.
  • the threaded end portions, respectively, with the internal and external thrust conical threads are made in such a way that the profile of the thrust conical thread has a negative angle a 2 and 4 along the reference face equal to (-) 2 ° " 'and a positive angle ⁇ 3 , and 5 along the embedded face, equal to (+) 10 ° ⁇ 0.5 ° to the plane perpendicular to the longitudinal axis X of the joint.
  • This embodiment of the profile of the persistent conical thread of the female and male pipes with a negative angle a 2 , 4 along the support face equal to (-) 2 ° " ° ' 5 makes it possible to perform multiple screwing - unscrewing without abrasion of surfaces, and also serves as a" lock »To prevent possible slipping, and with a positive angle of a 3 , a 5 along the embedded edge equal to (+) 10 ° ⁇ 0.5 °, it facilitates the make-up process, which increases the reliability of the threaded connection.
  • FIG. 1 shows a sealed threaded connection of metal pipes, a General view.
  • FIG. 2 shows a female pipe of a hermetic threaded connection of metal pipes, a fragment.
  • FIG. 3 shows a male pipe hermetic threaded connection of metal pipes, a fragment.
  • FIG. 4 shows a profile of a thrust conical thread of a male pipe.
  • FIG. 5 shows a profile of a thrust conical thread of a female pipe.
  • FIG. 6 shows a contact zone of a conical sealing surface of a female pipe in contact with a toroidal sealing surface of a male pipe, a fragment.
  • the hermetic threaded connection of metal pipes (Figs. 1-6) is formed (Fig. 1) by threaded end sections 1, 2, respectively, with an internal 3 and an external 4 thrust conical thread 3.4 of two coaxially spaced, covering 5 and covered 6 pipes 5,6 and contacting sealing 7.8 and thrust 9.10 surfaces 7.8 and 9.10.
  • the sealing surface 7 of the female pipe 5 is made conical (Fig. 2).
  • the sealing surface 8 of the male pipe 6 is made toroidal (Fig. 3).
  • the thrust surfaces 9,10 covering 5 and covered 6 pipes 5,6 are made conical with a negative angle ⁇ of taper to a plane perpendicular to the longitudinal axis X of the connection.
  • the male pipe 6 is made with an additional cylindrical surface 13, conjugated with a toroidal sealing surface 8 on the one hand, and with a threaded end section 2 on the other hand.
  • the main features of the hermetic threaded connection of metal pipes are the following improvements in its design.
  • the male pipe 6 is made with an additional conical surface 12 with a taper angle ⁇ of 25 - 35% to the longitudinal axis X of the joint mating with the toroidal sealing surface 8 on the one hand and with the conical thrust surface 10 on the other hand.
  • the mentioned main features of the improved proposed hermetic threaded connection of metal pipes provide it with an increase in the length of the contact zone b of the toroidal sealing surface 8 of the male pipe 6 in contact with the conical sealing surface 7 of the female pipe 5 to 2-7 mm and increasing the tightness of the connection, which significantly increases its reliability in operation.
  • the abutment surfaces 9.10 are conical with a negative angle ⁇ of taper (-) 10 ° ⁇ y ⁇ (-) 20 ° to a plane perpendicular to the longitudinal axis X of the joint.
  • the threaded end sections 1, 2, respectively, with the external 3 and internal 4 thrust conical threads 3.4 are made with a taper angle oi l of 5.25 - 8.25% to the longitudinal axis X of the connection.
  • the threaded end sections 1.2, respectively, with the inner 3 and outer 4 thrust conical threads 3,4 are made in such a way that the profile of the thrust conical thread has a negative angle a 2 , 4 along the reference face (-) 2 ° "0.5 ; and a positive angle a 3 , and 5 along the embedded face, equal to (+) 10 ° ⁇ 0.5 ° to the plane perpendicular to the longitudinal axis X of the joint (Fig. 4,5).
  • a prototype of a sealed threaded joint of metal pipes was formed by threaded end sections 1.2, respectively, with an internal 3 and an external 4 thrust conical thread 3.4 of two coaxially arranged, covering 5 and covered by 6 pipes 5.6 and contacting sealing 7.8 and thrust 9 , 10 with surfaces of 7.8 and 9.10.
  • the sealing surface 7 of the female pipe 5 was made conical, the sealing surface 8 of the female pipe 6 was made toroidal, and the thrust surfaces 9,10 of the female 5 and male 6 of the pipe 5,6 were made conical with a negative taper angle ⁇ to a plane perpendicular to the longitudinal axis X connections.
  • the male pipe 6 was made with an additional cylindrical surface 13, conjugated with a toroidal sealing surface 8 on the one hand, and with a threaded end section 2 on the other hand.
  • the male pipe 6 was made with an additional conical surface 12 with a taper angle ⁇ of 25 - 35% to the longitudinal axis X of the joint mating with the toroidal sealing surface 8 on the one hand and with the conical thrust surface 10 on the other hand.
  • the length of the contact zone b is:
  • the nominal external diameter of the covered pipe is 339.725 mm;
  • the nominal external diameter of the female pipe is 362 ⁇ 1 mm;
  • the radius of the sealing surface of the male pipe Ri is 130 ⁇ 0.5 mm;
  • Thread inclination angle op 6.25% ⁇ 0.1%
  • the taper angle of the conical sealing surface of the enclosing pipe ⁇ 30% ⁇ 0.1% to the longitudinal axis X of the connection (16.67 ° ⁇ 0.05 °);
  • the radius of the fillets of the inner annular grooves of the enclosing pipe R 3 0.5 mm;
  • the threaded end sections 1,2 When performing screwing or unscrewing operations, the threaded end sections 1,2 initially interact with the inner 3 and outer 4 thrust conical threads 3,4 of the female pipe 5 and the male pipe 6, respectively.
  • the conical sealing surface 7 of the female pipe 5 interacts with the toroidal sealing surface 8 of the male pipe 6.
  • the conical thrust surface 9 of the female pipe 5 is contacted with the conical thrust surface 10 of the female pipe 6 located at a negative angle ⁇ of taper (-) 10 ° ⁇ ⁇ (-) 20 ° to the plane perpendicular to the longitudinal axis X of the joint.

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  • 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)
  • Mutual Connection Of Rods And Tubes (AREA)

Abstract

L'invention concerne le domaine des raccords filetés étanches pour tubes métalliques utilisés dans l'industrie pétrolière et gazière. Le raccord est formé par des segments d'extrémité avec filet conique de butée interne et externe de deux tubes disposés coaxiaux et des surfaces de butée et d'étanchéité qui demeurent en contact. La surface d'étanchéité du tuyau enveloppant est conique, et la surface d'étanchéité du tuyau enveloppé est toroïdale. Les surfaces de butée des tuyaux sont coniques, avec un degré de conicité négatif. Le tuyau enveloppé possède une surface cylindrique supplémentaire qui rejoint la surface d'étanchéité toroïdale et le segment d'extrémité fileté. Le tuyau enveloppé possède une surface conique supplémentaire qui rejoint la surface d'étanchéité toroïdale et, de l'autre côté, la surface de butée conique. Le tuyau enveloppant possède une rainure interne annulaire située entre le segment d'extrémité fileté et la surface d'étanchéité conique. Le résultat technique consiste en une amélioration de l'étanchéité du raccord.
PCT/UA2015/000028 2014-10-23 2015-03-30 Raccord fileté étanche pour tubes métalliques Ceased WO2016064368A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
UAA201411528 2014-10-23
UAA201411528A UA111782C2 (uk) 2014-10-23 2014-10-23 Герметичне різьбове з'єднання металевих труб

Publications (1)

Publication Number Publication Date
WO2016064368A1 true WO2016064368A1 (fr) 2016-04-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/UA2015/000028 Ceased WO2016064368A1 (fr) 2014-10-23 2015-03-30 Raccord fileté étanche pour tubes métalliques

Country Status (2)

Country Link
UA (1) UA111782C2 (fr)
WO (1) WO2016064368A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112556982A (zh) * 2020-11-18 2021-03-26 西北工业大学 一种高速入水试验模型标准内测段结构
CN115450569A (zh) * 2021-06-08 2022-12-09 中国石油天然气集团有限公司 一种带限位台肩的气密封螺纹
CN116122744A (zh) * 2023-02-17 2023-05-16 天津钢管制造有限公司 一种小接箍的外密封结构

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2058505C1 (ru) * 1988-10-03 1996-04-20 Далмине С.П.А. Герметичное соединение металлических труб
EP0713952A1 (fr) * 1994-11-22 1996-05-29 Sumitomo Chemical Company, Limited Joint pour tubes filetés pour l'industrie pétrolière
EP1540227B1 (fr) * 2002-09-06 2007-12-12 Tenaris Connections AG Joint de tube filet

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2058505C1 (ru) * 1988-10-03 1996-04-20 Далмине С.П.А. Герметичное соединение металлических труб
EP0713952A1 (fr) * 1994-11-22 1996-05-29 Sumitomo Chemical Company, Limited Joint pour tubes filetés pour l'industrie pétrolière
EP1540227B1 (fr) * 2002-09-06 2007-12-12 Tenaris Connections AG Joint de tube filet

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112556982A (zh) * 2020-11-18 2021-03-26 西北工业大学 一种高速入水试验模型标准内测段结构
CN115450569A (zh) * 2021-06-08 2022-12-09 中国石油天然气集团有限公司 一种带限位台肩的气密封螺纹
CN116122744A (zh) * 2023-02-17 2023-05-16 天津钢管制造有限公司 一种小接箍的外密封结构

Also Published As

Publication number Publication date
UA111782C2 (uk) 2016-06-10

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