WO2012056500A1 - Raccord à vis pour tube de puits de pétrole - Google Patents

Raccord à vis pour tube de puits de pétrole Download PDF

Info

Publication number
WO2012056500A1
WO2012056500A1 PCT/JP2010/006387 JP2010006387W WO2012056500A1 WO 2012056500 A1 WO2012056500 A1 WO 2012056500A1 JP 2010006387 W JP2010006387 W JP 2010006387W WO 2012056500 A1 WO2012056500 A1 WO 2012056500A1
Authority
WO
WIPO (PCT)
Prior art keywords
seal
male screw
oil well
screw
well pipe
Prior art date
Application number
PCT/JP2010/006387
Other languages
English (en)
Japanese (ja)
Inventor
鈴木　照明
Original Assignee
株式会社メタルワン
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 株式会社メタルワン filed Critical 株式会社メタルワン
Priority to PCT/JP2010/006387 priority Critical patent/WO2012056500A1/fr
Publication of WO2012056500A1 publication Critical patent/WO2012056500A1/fr

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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

Definitions

  • the present invention relates to an oil well pipe screw joint.
  • casings made up of oil well pipes, oil well pipe screw joints, etc.
  • mined materials oil and natural gas
  • the mining material when mining a large volume of mining material from a deep formation, the mining material is usually at high temperature and high pressure, and accordingly, the casing may be plastically deformed to cause a leak. .
  • energy is generated by geothermal power generation.
  • geothermal wells excavated by geothermal power generation the casing is exposed to high temperature by water vapor. There is a risk of causing plastic deformation and leakage.
  • JP-B-2-31271 for example, see page 1 and FIG. 1
  • Patent Document 1 and Patent Document 2 are configured such that a contact portion between a convex curved seal on the male screw side and a tapered seal on the female screw side is bonded to form a seal.
  • a portion called an inner shoulder at the tip of the male screw and a thin butted portion of the female screw cause plastic deformation. If this plastic deformation reaches the contact portion between the male screw and the female screw, the surface pressure of the seal (main seal) decreases, and the mined product may leak.
  • the present invention was made to solve the above-described problems, and suppresses plastic deformation to the contact portion between the male screw and the female screw, and the mined product leaks. It aims at providing the screw joint for oil well pipes which controls.
  • the screw joint for oil well pipe includes a seal formed in a convex curved surface shape, a male screw having a shoulder formed on the tip side from the seal, and a female screw having a taper-formed seal,
  • the male screw seal is based on the thickness of the oil well pipe in a direction parallel to the longitudinal direction of the male screw. The length from the tip of the male screw to the contact portion is set.
  • FIG. 1 is a diagram for explaining in which part plastic deformation that occurs in the vicinity of the seal tip occurs when a drilled product having a predetermined pressure flows in the oil well pipe 200.
  • the relationship of the size of each component may be different from the actual one.
  • a cross-section of a joint tip portion of the oil well pipe 200 is shown.
  • the cross-sectional view in the plane parallel to the longitudinal direction is described.
  • FIG. 2 is a cross-sectional view in a plane parallel to the longitudinal direction of the oil well pipe screw joint 100 according to the embodiment of the present invention.
  • FIG. 3 explains tangent points of the oil well pipe screw joint 100 shown in FIG.
  • FIG. 4 explains the shape of the male screw seal 5 of the oil well pipe screw joint 100 shown in FIG. 1 and the thickness of the tip of the male screw with respect to the seal length.
  • the configuration of the male screw 1 will be described with reference to FIGS. 2, 3, and 4.
  • the oil well pipe screw joint 100 is formed by fitting a male screw 1 (PIN) to a female screw 2 (BOX).
  • the male screw 1 has a screw thread 3 on the outer surface of the male screw 1 formed in a spiral shape.
  • the screw thread 3 on the male screw side engages with the female screw 2.
  • a seal 5 having a predetermined shape is formed on the distal end side of the male screw 1 in a direction substantially parallel to the longitudinal direction of the oil well pipe screw joint 100 (X-axis direction in FIG. 1). As shown in FIG. 2, the tip side corresponds to the back side of the female screw 2 when viewed from the female screw 2 side.
  • the male screw seal 5 is crimped to the female screw seal 7 with “strong surface pressure” to suppress leakage of the mined material flowing through the oil well pipe screw joint 100.
  • the “strong surface pressure” is a level corresponding to a surface pressure at which the mined material flowing through the oil well pipe screw joint 100 does not leak from the seal, and is about 3000 kgf / cm 2, for example.
  • the male screw seal 5 is formed with a convex curved surface protruding in a direction from the male screw 1 toward the female screw 2.
  • the convex curved cross section is provided in a plane perpendicular to the longitudinal direction of the oil well pipe thread joint 100 through the end A of the male screw seal 5.
  • the arc is centered on the point O.
  • a curved surface that is convex in the positive direction of the Y axis such as an elliptical arc, may be used instead of an arc.
  • the length in the X-axis direction from the tip of the male screw seal 5 to the tangent point is based on the thickness of the oil well pipe. Is set. Specifically, the length in the X-axis direction from the tip of the male screw seal 5 to the tangent point is 6.35 mm when the oil well pipe thickness WT is 12.7 mm (0.500 inches) or less. (0.250 inch) or more. The length in the X-axis direction from the tip of the male screw seal 5 to the tangent point is such that the oil well pipe thickness WT is greater than 12.7 mm (0.500 inches) and 19.05 mm (0.750 inches) or less.
  • the length in the X-axis direction from the tip of the male screw seal 5 to the tangent point is 8.9 mm (0.00 mm) when the oil well pipe thickness WT is greater than 19.05 mm (0.750 inches). 350 inches) or more. Since the seal thickness WT2 is set by the thickness WT of the oil well pipe, the length in the X-axis direction from the tip of the male screw seal 5 to the tangent point may be set from the seal thickness WT2. Needless to say.
  • the seal thickness WT2 here is the thickness of the seal at the tangent point.
  • the plastic deformation of the seal causes the tip of the male screw seal 5 to Even if a length corresponding to the oil well pipe thickness WT (or seal thickness WT2) is generated in the negative direction of the X-axis from the portion, it is suppressed that plastic deformation reaches the tangent point. It is possible to prevent the mined material from leaking when mining the mined material with the oil well pipe 200 or when mining again after stopping the mining.
  • the tangent point is a portion where the male screw seal 5 and the female screw side seal 7 are in contact with each other and the corresponding contact portion is crimped.
  • the male screw seal 5 and the female screw seal 7 are in contact with each other on the surface.
  • the female screw seal 7 has a metaphysically perfect straight line so that the male screw seal 5 Is a complete arc, they touch at a certain point. This point of contact is called a tangent point.
  • the length in the X-axis direction from the tip to the tangent point is set based on the oil well pipe thickness WT, but from the tip of the male screw seal 5 to the tangent point.
  • the thickness of the tip portion is reduced by that amount (see arrow F). That is, by increasing the length of the portion occupied by the arc in the seal 5 of the male screw, the thickness decreases toward the tip of the male screw 1 by that amount, so the tip of the male screw 1 is plastic. It becomes easy to deform
  • the male screw seal 5 is formed so that the cross-sectional arc shape is formed in a direction from the tangent point to the tip of the male screw seal 5 up to a maximum of 3 mm from the tangent point.
  • a straight section L (FIG. 4B) is formed from the portion formed in the circular arc shape to the tip of the male screw 1.
  • the male screw seal 5 will be described on the assumption that the cross-sectional linear shape L is formed in a cross-sectional linear shape parallel to the X-axis, but it is not parallel to the X-axis unless the thickness is reduced. Also good.
  • a shoulder 6 having a predetermined angle is formed at the tip of the male screw 1.
  • This male threaded shoulder 6 acts to increase the surface pressure of the seal by the structure having a predetermined angle as described above when the mined material flows and compressive force is applied to the oil well pipe joint 100. Therefore, it is possible to prevent the mined product from leaking.
  • the angle ⁇ 2 of the shoulder 6 of the male screw is an angle formed clockwise with respect to the perpendicular direction (the negative direction of the Y axis) from the inner surface to the outer surface of the male screw. 5 degrees to 10 degrees. The reason for this will be described in the description of FIGS.
  • the configuration of the female screw 2 will be described with reference to FIGS. 2, 3, and 4.
  • the female screw 2 has a screw thread 4 on the female screw side formed in a spiral shape so as to be engaged with the screw thread 3 on the male screw side.
  • the screw thread 3 on the male screw side is connected to the screw thread 4 on the female screw side. It comes to fit.
  • a female screw seal 7 which is a linear taper in a cross section of a surface substantially parallel to the longitudinal direction of the oil well pipe joint 100, is formed on the back side of the female screw 2, a female screw seal 7, which is a linear taper in a cross section of a surface substantially parallel to the longitudinal direction of the oil well pipe joint 100, is formed. As shown in FIG. 1, the back side corresponds to the front end side of the male screw 1 when viewed from the male screw 1 side.
  • the female screw seal 7 is connected to the male screw seal 5 with a strong surface pressure to suppress leakage of the mined material flowing through the oil well pipe joint 100.
  • the female screw seal 7 has a predetermined angle ⁇ 1. As shown in FIG. 3, the predetermined angle ⁇ 1 is set to 5 degrees or less clockwise with respect to a direction parallel to the longitudinal direction of the oil well pipe joint 100 (the positive direction of the X axis). This is because not only the internal pressure caused by the mined material but also the tensile force is exerted on the oil well pipe 200 due to its own weight, and the tensile force may become so strong that the oil well pipe 200 is plastically deformed. is there. When such a tensile force is applied, the female screw seal 7 is elongated in the longitudinal direction of the oil well pipe 200, resulting in misalignment between the male screw seal 5 and the female screw seal 7.
  • the surface pressure between the male screw seal 5 and the female screw seal 7 is reduced, which causes leakage.
  • the taper of the predetermined angle ⁇ 1 is formed on the female thread seal 7 and the oil well pipe 200 is elongated in the longitudinal direction, it contacts the male thread seal 5. Since the reduction of the surface pressure is suppressed, the leakage is suppressed (self-sealing effect).
  • the female threaded shoulder 8 has a predetermined angle similar to that of the male threaded shoulder 6, and the angle is such that the female threaded shoulder 8 and the male threaded shoulder 6 are crimped so that there is as little gap as possible. Good.
  • FIG. 5 illustrates the magnitude of the seal surface pressure with respect to the distance from the tip of the male screw 1 based on the simulation results.
  • FIG. 5 shows that an oil pipe is formed by fitting a male screw and a female screw of a predetermined shape, and a fluid (predetermined density, flow rate and other parameters) corresponding to a mined product is formed inside the oil well pipe 200.
  • the result of verifying by simulation using the finite element method how the surface pressure of the male screw seal changes with respect to the distance from the tip of the male screw It is.
  • the surface pressure is generated from about 1.8 mm to 4.2 mm from the tip of the male screw.
  • the male screw is a contact portion with the female screw between about 1.8 mm and 4.2 mm from the tip of the male screw.
  • the length of the contact portion is referred to as “contact length”.
  • the value having the highest surface pressure in the “contact length” is referred to as “maximum surface pressure”.
  • a value obtained by integrating the value of the seal surface pressure at the contact portion is referred to as “seal index (seal performance)”.
  • the “seal index (seal performance)” is, in other words, an index indicating that if the “contact length” of the seal is long and the “surface pressure” is large, the seal is difficult to leak.
  • FIG. 6 illustrates the size of the seal index with respect to the shoulder surface tightening allowance for each shoulder angle.
  • FIG. 7 explains the decrease in the seal surface pressure with respect to the shoulder angle.
  • FIG. 6 it can be understood that as the size of the angle ⁇ ⁇ b> 2 of the shoulder 6 is increased, the “seal index” is also increased, so that the sealing performance is improved.
  • FIG. 7 when the size of the angle ⁇ 2 of the shoulder 6 is increased, when the drilled material flows and pressure is applied to the oil well pipe 200, the male screw seal 5 is connected to the female screw. It can be seen that the amount of plastic deformation is increased by the amount of pressing strongly against the seal 7 side. Therefore, when the angle ⁇ 2 of the shoulder 6 is set to 5 degrees to 10 degrees by balancing the results of FIGS. 6 and 7, the plastic deformation amount can be suppressed while improving the sealing performance.
  • the oil well pipe screw joint 100 sets the length in the X-axis direction from the tip of the male screw seal 5 to the tangent point based on the thickness WT of the oil well pipe.
  • compression it is possible to suppress plastic deformation to the contact portion between the male screw and the female screw, so that it is possible to suppress the leakage of the mined material. Therefore, it is possible to prevent the mined product from leaking when mining the mined product with the oil well pipe 200 or when mining again after stopping the mining.
  • the oil well pipe screw joint 100 has a cross-sectional arc shape in a direction from the tangent point toward the tip of the male screw seal 5 and has a maximum of 3 mm from the tangent point. Since the cross section of the male screw 1 is formed in a linear shape, it is possible to suppress plastic deformation to the contact portion between the male screw and the female screw when the oil well pipe joint 100 is highly compressed. . Therefore, it is possible to prevent the mined product from leaking when mining the mined product with the oil well pipe 200 or when mining again after stopping the mining.
  • the oil well pipe thread joint 100 has a taper angle ⁇ 1 of the female thread seal 7 of 5 degrees or less clockwise with respect to a direction parallel to the longitudinal direction of the oil well pipe thread joint 100 (positive direction of the X axis). It is said.
  • the screw joint for the oil well pipe Even if a tensile force opposite to the compressive force acts to cause elongation in the longitudinal direction of the oil well pipe 200, the contact surface pressure with the male screw seal 5 is suppressed from decreasing. Therefore, it is possible to prevent the mined product from leaking when mining the mined product with the oil well pipe 200 or when mining again after stopping the mining.
  • the oil joint pipe screw joint 100 has the shoulder 6 having an angle ⁇ 2 of 5 degrees to 10 degrees, the amount of plastic deformation can be suppressed while improving the sealing performance. Therefore, it is possible to prevent the mined product from leaking when mining the mined product with the oil well pipe 200 or when mining again after stopping the mining.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (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

L'invention porte sur un raccord à vis pour un tube de puits de pétrole, ledit raccord étant équipé d'une vis mâle (1) ayant un joint (5) formé sur une surface convexe et un épaulement (6) formé plus loin que le joint (5) en direction de la pointe, et d'une vis femelle (10) ayant un joint conique (7), la partie de contact du joint (5) de la vis mâle et du joint (7) de la vis femelle étant formée par assemblage sous pression, et la longueur de la vis mâle (5), de la pointe de ladite vis mâle à la partie de contact précitée dans la direction parallèle à la direction longitudinale de la vis mâle, étant réglée sur la base de l'épaisseur du tube de puits de pétrole (100).
PCT/JP2010/006387 2010-10-29 2010-10-29 Raccord à vis pour tube de puits de pétrole WO2012056500A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2010/006387 WO2012056500A1 (fr) 2010-10-29 2010-10-29 Raccord à vis pour tube de puits de pétrole

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2010/006387 WO2012056500A1 (fr) 2010-10-29 2010-10-29 Raccord à vis pour tube de puits de pétrole

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WO2012056500A1 true WO2012056500A1 (fr) 2012-05-03

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013029175A (ja) * 2011-07-29 2013-02-07 Jfe Steel Corp 鋼管用ねじ継手
JP2013029176A (ja) * 2011-07-29 2013-02-07 Jfe Steel Corp 鋼管用ねじ継手
WO2015015799A1 (fr) * 2013-07-30 2015-02-05 Ｊｆｅスチール株式会社 Raccord fileté pour matériel tubulaire pétrolier
WO2015104739A1 (fr) * 2014-01-10 2015-07-16 Ｊｆｅスチール株式会社 Raccord avec filetage pour tuyaux de puits de pétrole à parois extrêmement épaisses
WO2017141538A1 (fr) * 2016-02-19 2017-08-24 Ｊｆｅスチール株式会社 Joint fileté pour conduite de puits de pétrole
US10202809B2 (en) 2013-01-28 2019-02-12 Jfe Steel Corporation Threaded joint for steel pipes
CN110651149A (zh) * 2017-05-22 2020-01-03 日本制铁株式会社 钢管用螺纹接头
EP3702656A4 (fr) * 2017-10-25 2020-10-28 Nippon Steel Corporation Raccord fileté pour tuyau en acier
AT17396U1 (de) * 2020-12-23 2022-03-15 Llc Interpipe Man Dichte Metallrohrgewindeverbindung
EP3356607B1 (fr) * 2015-09-30 2023-01-18 Victor Jan De Waal Pieu

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000314490A (ja) * 1999-04-30 2000-11-14 Kawasaki Steel Corp 油井管用鋼管ねじ継手
JP2001082644A (ja) * 1999-09-17 2001-03-30 Sumitomo Metal Ind Ltd 油井管用ねじ継手の製造方法
JP2005511990A (ja) * 2001-12-07 2005-04-28 バローレック・マネスマン・オイル・アンド・ガス・フランス 端部リップを備える少なくとも１つのねじ部分を含む高品質なねじ付き管継手
JP2005351324A (ja) * 2004-06-09 2005-12-22 Metal One Corp 油井管用ネジ継手

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000314490A (ja) * 1999-04-30 2000-11-14 Kawasaki Steel Corp 油井管用鋼管ねじ継手
JP2001082644A (ja) * 1999-09-17 2001-03-30 Sumitomo Metal Ind Ltd 油井管用ねじ継手の製造方法
JP2005511990A (ja) * 2001-12-07 2005-04-28 バローレック・マネスマン・オイル・アンド・ガス・フランス 端部リップを備える少なくとも１つのねじ部分を含む高品質なねじ付き管継手
JP2005351324A (ja) * 2004-06-09 2005-12-22 Metal One Corp 油井管用ネジ継手

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013029175A (ja) * 2011-07-29 2013-02-07 Jfe Steel Corp 鋼管用ねじ継手
JP2013029176A (ja) * 2011-07-29 2013-02-07 Jfe Steel Corp 鋼管用ねじ継手
US10202809B2 (en) 2013-01-28 2019-02-12 Jfe Steel Corporation Threaded joint for steel pipes
WO2015015799A1 (fr) * 2013-07-30 2015-02-05 Ｊｆｅスチール株式会社 Raccord fileté pour matériel tubulaire pétrolier
JP2015028346A (ja) * 2013-07-30 2015-02-12 Ｊｆｅスチール株式会社 耐久性に優れた油井管用ねじ継手
US9982815B2 (en) 2013-07-30 2018-05-29 Jfe Steel Corporation Threaded joint for oil country tubular goods
AU2014376828B2 (en) * 2014-01-10 2016-09-22 Jfe Steel Corporation Threaded joint for heavy-walled oil country tubular goods
JP2015132285A (ja) * 2014-01-10 2015-07-23 Ｊｆｅスチール株式会社 極厚肉油井管用ねじ継手
US9709196B2 (en) 2014-01-10 2017-07-18 Jfe Steel Corporation Threaded joint for heavy-walled oil country tubular goods
WO2015104739A1 (fr) * 2014-01-10 2015-07-16 Ｊｆｅスチール株式会社 Raccord avec filetage pour tuyaux de puits de pétrole à parois extrêmement épaisses
RU2637783C1 (ru) * 2014-01-10 2017-12-07 ДжФЕ СТИЛ КОРПОРЕЙШН Резьбовое соединение для толстостенных трубных изделий нефтепромыслового сортамента
EP3356607B1 (fr) * 2015-09-30 2023-01-18 Victor Jan De Waal Pieu
CN107101054B (zh) * 2016-02-19 2019-06-28 杰富意钢铁株式会社 油井管用螺纹接头
US10900595B2 (en) 2016-02-19 2021-01-26 Jfe Steel Corporation Threaded joint for oil well tubing
EP3418617A4 (fr) * 2016-02-19 2019-03-20 JFE Steel Corporation Joint fileté pour conduite de puits de pétrole
AU2016393093B2 (en) * 2016-02-19 2019-05-02 Jfe Steel Corporation Threaded joint for oil well tubing
RU2692177C1 (ru) * 2016-02-19 2019-06-21 ДжФЕ СТИЛ КОРПОРЕЙШН Резьбовое соединение насосно-компрессорных труб для нефтяных скважин
CN107101054A (zh) * 2016-02-19 2017-08-29 杰富意钢铁株式会社 油井管用螺纹接头
WO2017141538A1 (fr) * 2016-02-19 2017-08-24 Ｊｆｅスチール株式会社 Joint fileté pour conduite de puits de pétrole
JP6187724B1 (ja) * 2016-02-19 2017-08-30 Ｊｆｅスチール株式会社 油井管用ねじ継手
AU2018273320B2 (en) * 2017-05-22 2020-11-26 Nippon Steel Corporation Threaded connection for steel pipes
EP3633255A4 (fr) * 2017-05-22 2020-06-17 Nippon Steel Corporation Joint à vis pour tuyau en acier
CN110651149B (zh) * 2017-05-22 2021-05-07 日本制铁株式会社 钢管用螺纹接头
US11339901B2 (en) 2017-05-22 2022-05-24 Nippon Steel Corporation Threaded connection for steel pipes
CN110651149A (zh) * 2017-05-22 2020-01-03 日本制铁株式会社 钢管用螺纹接头
EP3702656A4 (fr) * 2017-10-25 2020-10-28 Nippon Steel Corporation Raccord fileté pour tuyau en acier
AT17396U1 (de) * 2020-12-23 2022-03-15 Llc Interpipe Man Dichte Metallrohrgewindeverbindung

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