WO2019093311A1 - 鋼管用ねじ継手 - Google Patents
鋼管用ねじ継手 Download PDFInfo
- Publication number
- WO2019093311A1 WO2019093311A1 PCT/JP2018/041148 JP2018041148W WO2019093311A1 WO 2019093311 A1 WO2019093311 A1 WO 2019093311A1 JP 2018041148 W JP2018041148 W JP 2018041148W WO 2019093311 A1 WO2019093311 A1 WO 2019093311A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pin
- box
- seal
- shoulder
- nose
- Prior art date
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 40
- 239000010959 steel Substances 0.000 title claims abstract description 40
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 238000007789 sealing Methods 0.000 abstract description 45
- 230000008878 coupling Effects 0.000 description 14
- 238000010168 coupling process Methods 0.000 description 14
- 238000005859 coupling reaction Methods 0.000 description 14
- 238000011156 evaluation Methods 0.000 description 13
- 239000003129 oil well Substances 0.000 description 10
- 239000002184 metal Substances 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002343 natural gas well Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
Images
Classifications
-
- 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
- F16L15/04—Screw-threaded joints; Forms of screw-threads for such joints with additional sealings
-
- 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
- F16L15/006—Screw-threaded joints; Forms of screw-threads for such joints with straight threads
- F16L15/007—Screw-threaded joints; Forms of screw-threads for such joints with straight threads with more than one threaded section
-
- 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
Definitions
- the present disclosure relates to a threaded joint for steel pipe.
- oil wells For example, exploration or production of oil wells or natural gas wells etc. (hereinafter collectively referred to as “oil wells”), development of unconventional resources such as oil sands and shale gas, carbon dioxide recovery and storage (CCS (Carbon (Carbon (Carbon))
- CCS Carbon (Carbon (Carbon)
- a steel pipe called an oil well pipe is used in dioxide capture and storage), geothermal power generation, or hot spring.
- a threaded joint is used to connect the steel pipes.
- the types of threaded joints for steel pipes of this type are roughly classified into coupling types and integral types.
- the coupling type of the pair of pipes to be connected, one pipe is a steel pipe, and the other pipe is a coupling.
- a male screw is formed on the outer circumference of both ends of the steel pipe, and a female screw is formed on the inner circumference of both ends of the coupling.
- the external thread of the steel pipe is screwed into the internal thread of the coupling, and thereby both are fastened and connected.
- the pair of pipes to be connected are both steel pipes, and separate couplings are not used.
- a male screw is formed on the outer periphery of one end of the steel pipe, and a female screw is formed on the inner periphery of the other end. Then, the male screw of one steel pipe is screwed into the female screw of the other steel pipe, and thereby both are fastened and connected.
- the joint portion of the end of the tube on which the external thread is formed is referred to as a "pin” because it includes an element to be inserted into the internal thread.
- the joint portion at the end of the tube in which the internal thread is formed is referred to as a "box” because it includes an element for receiving the external thread.
- the result is a structure in which the well well is disposed in multiple layers.
- the inner diameter and outer diameter of the joint are steel pipes for the connection of oil well pipes. Threaded joints that are as large as or slightly larger than the inner and outer diameters are often used. By using such a threaded joint, it is possible to minimize the gap between oil well pipes arranged in multiple layers, and even if it is deep, the diameter of the well is not so large and oil wells can be efficiently developed.
- metal seal As a screw joint for securing sealing performance, one having a seal by metal-metal contact (hereinafter referred to as “metal seal”) is known.
- the diameter of the sealing surface of the pin is slightly larger than the diameter of the sealing surface of the box (this difference in diameter is called “the amount of interference"), the screw joints are fastened and the sealing surfaces are fitted together. Then, the sealing surface of the pin is reduced in diameter due to the interference amount, the sealing surface of the box is expanded, and the elastic recovery force that each sealing surface tries to return to the original diameter generates contact pressure on the sealing surface. It is in close contact with the circumference and exhibits a sealing performance.
- Patent Document 1 discloses a threaded joint for steel pipe composed of a pin and a box.
- the pin has an external thread, a sealing surface and a shoulder surface.
- the box has an internal thread, a sealing surface and a shoulder surface.
- the pin has a nose which is provided between the sealing surface and the shoulder surface. The nose does not contact the corresponding part of the box.
- the shoulder angle is described as being 4 to 16 degrees to a plane perpendicular to the tube axis.
- Patent Document 2 discloses a threaded joint for steel pipe configured of a pin and a box.
- the pin has an external thread portion, a nose portion extending from the external thread portion toward the end of the tube, and a shoulder portion provided at the tip of the nose portion.
- the box has an internally threaded portion screwed with the externally threaded portion to form a threaded portion, a sealing surface facing the outer peripheral surface of the nose portion of the pin, and a shoulder portion abutting the shoulder portion of the pin.
- the outer peripheral surface of the nose portion of the pin is a curved surface that is convex outward.
- the sealing surface of the box is a single tapered shape. The outer surface of the nose of the pin and the sealing surface of the box make metal-to-metal contact, and the contact forms a seal.
- Patent Document 3 discloses a threaded joint of a pipe composed of a pin member and a box member.
- the pin member has an external thread portion, a nose portion extending toward the end of the tube from the external thread portion, and a shoulder portion provided at the tip of the nose portion.
- the box member has an internal thread portion screwed to the external thread portion, an inner peripheral surface opposite to the outer peripheral surface of the pin nose which is the nose portion of the pin member, and a shoulder portion contacting the shoulder portion of the pin member.
- the outer peripheral surface of the pin nose is a convex curved surface.
- the inner circumferential surface of the box member is a tapered surface that interferes with the convex curved surface of the pin nose when coupled to the pin member.
- the shoulder angle of the shoulder portion is 0 degrees or more.
- An object of the present disclosure is to provide a threaded joint for steel pipe that can improve the sealing performance against internal pressure and external pressure.
- the present inventors have intensively studied factors that affect the sealing performance against internal pressure and external pressure. As a result, the inventors newly found that the distance from the tip of the pin to the metal seal affects the sealing performance. In addition to this finding, the present inventors have newly found that the thickness ratio of the pin and the box in the metal seal, which has not been studied before, affects the sealing performance. Based on these new findings, the present inventors invented the following screw joint.
- the threaded joint for steel pipe includes a tubular pin formed at one end of a steel pipe, and a tubular box into which the pin is inserted and fastened with the pin.
- the pin is a male screw formed on the outer periphery of the pin, a nose formed on the tip of the pin and having an outer diameter smaller than the inner diameter of the opposing portion of the box when the pin and the box are fastened; And a pin sealing surface formed on the outer peripheral surface of the pin between the male screw and the nose.
- the pin seal surface includes a first curved surface located closer to the pin shoulder surface, a second curved surface located farther from the pin shoulder surface, and a first taper located between the first curved surface and the second curved surface. Including faces.
- the box corresponds to an external thread, an internal thread formed on the inner periphery of the box, a box shoulder surface facing the pin shoulder surface, and contacting the pin shoulder surface with the pin and the box fastened, and a pin sealing surface And a box seal surface that contacts the pin seal surface when the pin and the box are fastened.
- the box seal surface is located between the third curved surface located closer to the box shoulder surface, the fourth curved surface located farther from the box shoulder surface, and the third curved surface and the fourth curved surface.
- a second tapered surface is located.
- the box seal surface has a seal point located at a midpoint in the tube axis direction on the second tapered surface.
- the seal point distance between the tip of the nose and the seal point in the axial direction is 13 mm or more.
- the shoulder angle between the pin shoulder surface or box shoulder surface and the plane perpendicular to the tube axis is 2 to 13 degrees.
- the seal thickness ratio of the box thickness to the pin thickness at the seal point is 1.7 or more.
- the seal point distance may be 13 to 25 mm.
- the shoulder angle may be 2 to 10 degrees.
- the seal thickness ratio may be 1.8 to 3.0.
- FIG. 1 is a longitudinal sectional view along the axial direction of a coupling-type threaded joint for steel pipes according to the embodiment.
- FIG. 2 is a longitudinal cross-sectional view along an axial direction of a thread joint for integral type steel pipe different from FIG.
- FIG. 3 is an enlarged vertical cross-sectional view of a portion II in FIG.
- FIG. 4 is an enlarged vertical sectional view around the seal and the nose in FIG.
- FIG. 5 is a graph showing a path of load conditions used in FEM analysis.
- FIG. 6 is a graph showing evaluation results of torque performance.
- FIG. 7 is a graph showing the evaluation results of sealing performance under a combined load.
- FIG. 8 is a graph showing evaluation results of sealing performance against external pressure.
- FIG. 9 is a graph showing the evaluation results of the sealing performance with respect to the internal pressure.
- the steel pipe threaded joint 1 includes a tubular pin 10 and a tubular box 20.
- the pin 10 is formed at one end of the steel pipe 2.
- the pin 10 is inserted and fastened to the pin 10.
- a portion other than the tip end portion of the steel pipe 2 may be particularly referred to as a “steel pipe main body”.
- the threaded joint 1 shown in FIG. 1 is of the coupling type and comprises two pins 10, 10 and a coupling 3.
- One pin 10 is formed at the tip of one steel pipe 2.
- the other pin 10 is formed at the tip of the other steel pipe 2.
- the coupling 3 comprises two boxes 20, 20 and an annular projection 31.
- One box 20 is formed at one end of the coupling 3.
- the other box 20 is formed at the other end of the coupling 3.
- the protrusion 31 is formed at the central portion of the coupling 3.
- One pin 20 is inserted into one box 20 and fastened to one pin 10.
- the other box 20 is formed on the opposite side of one box 20, and the other pin 10 is inserted and fastened to the other pin 10.
- the screw joint 1 may be integral type. As shown in FIG. 2, the integral screw joint 1 is for connecting two steel pipes 2 to each other, and includes a pin 10 and a box 20. In the integral screw joint 1, one steel pipe 2 is provided with a pin 10 and the other steel pipe 2 is provided with a box 20.
- pin 10 includes an external thread 11, a nose 12, a pin shoulder surface 13 and a pin seal surface 14.
- the male screw 11 is formed on the outer periphery of the pin 10.
- the nose 12 is formed at the tip of the pin 10 and has an outer diameter smaller than the inner diameter of the opposing portion of the box 20 when the pin 10 and the box 20 are fastened. Therefore, as shown in FIG. 4, a minute gap is formed between the outer peripheral surface of the nose 12 of the pin 10 and the inner peripheral surface of the box 20 opposed thereto.
- the pin shoulder surface 13 is formed at the tip of the nose 12.
- the pin seal surface 14 is formed on the outer peripheral surface of the pin 10 between the male screw 11 and the nose 12.
- the pin seal surface 14 has a curvature surface 141 located closer to the pin shoulder surface 13, a curvature surface 143 located farther from the pin shoulder surface 13, and a tapered surface 142 located between the curvature surface 141 and the curvature surface 143. including. That is, the pin seal surface 14 includes the curvature surface 141, the tapered surface 142, and the curvature surface 143.
- the curved surface 141, the tapered surface 142, and the curved surface 143 are arranged in order along the tube axis direction CL.
- the box 20 includes an internal thread 21, a box shoulder surface 23 and a box sealing surface 24.
- the female screw 21 corresponds to the male screw 11 and is formed on the inner periphery of the box 20.
- the box shoulder surface 23 faces the pin shoulder surface 13 and contacts the pin shoulder surface 13 with the pin 10 and the box 20 fastened.
- the box seal surface 24 faces the pin seal surface 14 and contacts the pin seal surface 14 with the pin 10 and the box 20 fastened.
- the box seal surface 24 has a curvature surface 241 located closer to the box shoulder surface 23, a curvature surface 243 located farther from the box shoulder surface 23, and a taper located between the curvature surface 241 and the curvature surface 243. And a face 242. That is, the box seal surface 24 includes the curvature surface 241, the tapered surface 242, and the curvature surface 243.
- the curved surface 241, the tapered surface 242, and the curved surface 243 are arranged in order along the tube axis direction CL.
- the male screw 11 and the female screw 21 are trapezoidal screws whose shape is changed based on a buttress screw.
- the box seal surface 24 has a seal point SP.
- the seal point SP is located at the midpoint of the box seal surface 24 in the axial direction CL on the tapered surface 242 of the box seal surface 24.
- the seal point distance L SP is 13 mm or more.
- the seal point distance L SP is a distance between the tip of the nose 12 and the seal point SP in the pipe axial direction CL.
- the shoulder angle ⁇ is 2 to 13 degrees.
- the shoulder angle ⁇ is the angle between the pin shoulder surface 13 or the box shoulder surface 23 and the plane VP perpendicular to the tube axis CL.
- the seal thickness ratio T B / T P is 1.7 or more.
- the seal thickness ratio T B / T P is the thickness of the box 20 with respect to the thickness of the pin 10 at the seal point SP (hereinafter referred to as “pin seal thickness”) T P (hereinafter referred to as “box seal thickness”). ) is the ratio of T B.
- W indicates the outer diameter of the box 20
- ID indicates the inner diameter of the tube body 2.
- the lower limit value of the seal point distance L SP is preferably 14 mm, more preferably 15 mm.
- the upper limit of the sealing point distance L SP is, for example, may be 25 mm, preferably 24 mm, more preferably 23 mm.
- the lower limit value of the shoulder angle ⁇ is preferably 3 degrees, more preferably 4 degrees.
- the upper limit value of the shoulder angle ⁇ is preferably 10 degrees, more preferably 9 degrees.
- the lower limit value of the seal thickness ratio T B / T P is preferably 1.8, and more preferably 1.9.
- the upper limit value of the seal thickness ratio T B / T P is, for example, such that the outer diameter of the coupling 3 is too large to interfere with the inner surface of the outer pin 10 when inserting a plurality of steel pipes in a multilayer. Although it may be 3.0, it is preferably 2.9, more preferably 2.8.
- the seal point distance L SP is 13 mm or more
- the rigidity of the nose 12 is high, and the compressive load is applied to the nose 12 even when a compressive load is applied to the threaded joint 1. It is possible to suppress the deflection of the seal surface of the seal and to suppress the decrease in the contact surface pressure.
- the seal thickness ratio T B / T P is 1.7 or more, the rigidity of the box 20 is increased, and the adhesion of the seal surface is maintained by the box 20 being particularly raised in push-up resistance by the internal pressure. Therefore, it is possible to suppress the decrease in the contact pressure of the metal seal. As a result, the sealing performance against the internal pressure and the external pressure can be improved.
- Tables 1 and 2 show the dimensions of the 42 experimental examples tested for analysis and the evaluation results thereof.
- the outer diameter of the tube body 2, the inner diameter ID of the tube body 2, the outer diameter W of the box 20, the pin seal thickness T P , the box seal thickness T B , and the seal thickness ratio T B / T P are made constant.
- Seal point (SP) distance L SP and shoulder angle ⁇ were changed.
- Table 1 sorts by seal point distance L SP and shows yield torque as a result of evaluation of torque performance.
- Table 2 is sorted by the shoulder angle ⁇ , and shows the minimum seal contact force as a result of the evaluation of the sealing performance. The definition of the yield torque and the minimum seal contact force will be described later.
- the shoulder angle ⁇ of the pin 10 and the shoulder angle ⁇ of the box are the same.
- Table 3 shows the dimensions of eight experimental examples different from the above except for the code 5 (identical to the code 33 in Tables 1 and 2) and the evaluation results of the sealing performance thereof.
- the outer diameter W of the tube 20, the inner diameter ID of the tube 2 ID, the pin seal thickness T P , the seal point distance L SP and the shoulder angle ⁇ are made constant, and the outer diameter W of the box 20 and the box seal thickness T B Changes the seal thickness ratio T B / T P.
- the minimum seal contact force when the external pressure and the internal pressure are applied is shown.
- a value MTV (Maximum Torque Value) at which a fastening torque diagram starts to yield was defined as "yield torque” and evaluated using that value.
- the sealing performance is analyzed under the combined load condition simulating the ISO 13679 series A test shown in FIG. 5, the value of the seal contact force at each load step is determined, and the minimum value is defined as the “minimum seal contact force”. , And evaluated using that value.
- the seal thickness ratio T B / T P sealing performance under simple external pressure and simple internal pressure was also considered. Only the external pressure or only the internal pressure was gradually increased without applying an axial force, and the minimum seal contact force at that time was evaluated.
- FIG. 6 shows the yield torque obtained by FEM. It was found from FIG. 6 that the yield torque depends on the seal point distance L SP and the shoulder angle ⁇ . As the seal point distance L SP is increased, the rigidity is increased, and thus the torque performance is considered to be improved. On the other hand, when the shoulder angle ⁇ is 5 degrees, the yield torque is maximized, and when the shoulder angle ⁇ becomes larger than 5 degrees, the yield torque decreases. As described above, since the torque performance is largely influenced by the shoulder angle ⁇ , it has been found that the shoulder angle ⁇ is preferably 2 to 13 degrees.
- FIG. 7 shows the evaluation results of sealing performance under a combined load.
- the minimum sealing contact force was generated at the simple external pressure of the load step (12) in FIG. From FIG. 7, it was found that the sealing performance is improved regardless of the shoulder angle ⁇ if the seal point distance L SP is 13 mm or more. From these evaluation results, it was found that the shoulder angle ⁇ should be 2 to 13 degrees and the seal point distance L SP should be 13 mm or more in order to achieve both high sealing performance and high torque performance.
- the shoulder angle ⁇ was fixed at 5 degrees
- the seal point distance L SP was fixed at 13 mm
- the seal thickness ratio T B / T P was changed.
- the sealing performance was evaluated using the load paths of the simple internal pressure and the simple external pressure shown in FIG. FIG. 8 shows the evaluation results of the sealing performance under simple external pressure and FIG. 9 in simple internal pressure.
- the sealing performance improved as the seal thickness ratio T B / T P increased, but from FIG. 9 in particular, the sealing performance against the internal pressure is remarkable when the seal thickness ratio T B / T P is less than 1.7. Low and saturated at 1.7 or more. Therefore, it was found that the seal thickness ratio T B / T P is desirably 1.7 or more.
- Threaded joint 2 Steel pipe (steel pipe body) 3: Coupling 10: Pin 11: Male thread 12: Nose 13: Pin shoulder face 14: Pin seal face 20: Box 21: Female thread 23: Box shoulder face 24: Box seal face 141, 143, 241, 243: Curvature faces 142, 242 : Tapered surface SP: Seal point L SP : Seal point distance ⁇ : Shoulder angle T B / T P : Seal thickness ratio CL: Pipe axis
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Abstract
Description
サイズ:7インチ、26#(管本体外径:177.8mm、管本体内径:159.41mm)
材料:API規格の油井管材料L80(公称耐力YS=552MPa(80ksi))
2:鋼管(鋼管本体)
3:カップリング
10:ピン
11:雄ねじ
12:ノーズ
13:ピンショルダ面
14:ピンシール面
20:ボックス
21:雌ねじ
23:ボックスショルダ面
24:ボックスシール面
141,143,241,243:曲率面
142,242:テーパ面
SP:シールポイント
LSP:シールポイント距離
α:ショルダ角
TB/TP:シール肉厚比
CL:管軸
Claims (2)
- 鋼管用ねじ継手であって、
前記鋼管の一方の先端部に形成される管状のピンと、
前記ピンが挿入されて前記ピンと締結される管状のボックスとを備え、
前記ピンは、
前記ピンの外周に形成される雄ねじと、
前記ピンの先端部に形成され、前記ピン及び前記ボックスが締結されている状態で前記ボックスのうち対向する部分の内径よりも小さい外径を有するノーズと、
前記ノーズの先端に形成されるピンショルダ面と、
前記雄ねじと前記ノーズとの間において前記ピンの外周面に形成されるピンシール面とを含み、
前記ピンシール面は、前記ピンショルダ面に近い方に位置する第1曲率面と、前記ピンショルダ面から遠い方に位置する第2曲率面と、前記第1曲率面と前記第2曲率面との間に位置する第1テーパ面とを含み、
前記ボックスは、
前記雄ねじに対応し、前記ボックスの内周に形成される雌ねじと、
前記ピンショルダ面に対向し、前記ピン及び前記ボックスが締結されている状態で前記ピンショルダ面と接触するボックスショルダ面と、
前記ピンシール面に対向し、前記ピン及び前記ボックスが締結されている状態で前記ピンシール面と接触するボックスシール面とを含み、
前記ボックスシール面は、前記ボックスショルダ面に近い方に位置する第3曲率面と、前記ボックスショルダ面から遠い方に位置する第4曲率面と、前記第3曲率面と前記第4曲率面との間に位置する第2テーパ面とを含み、
前記ボックスシール面は、前記テーパ面上の管軸方向における中点に位置するシールポイントを有し、
管軸方向における前記ノーズの先端と前記シールポイントとの間のシールポイント距離は13mm以上であり、
前記ピンショルダ面又は前記ボックスショルダ面と管軸に垂直な平面との間のショルダ角は2~13度であり、かつ、
前記シールポイントにおける前記ピンの肉厚に対する前記ボックスの肉厚のシール肉厚比は1.7以上である、鋼管用ねじ継手。 - 請求項1に記載の鋼管用ねじ継手であって、
前記シールポイント距離は13~25mmであり、
前記ショルダ角は2~10度であり、かつ、
前記シール肉厚比は1.8~3.0である、鋼管用ねじ継手。
Priority Applications (12)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2018364919A AU2018364919B2 (en) | 2017-11-09 | 2018-11-06 | Threaded connection for steel pipe |
UAA202001922A UA123131C2 (uk) | 2017-11-09 | 2018-11-06 | Нарізне з'єднання для сталевої труби |
CA3080458A CA3080458C (en) | 2017-11-09 | 2018-11-06 | Threaded connection for steel pipe |
JP2019552799A JP6804664B2 (ja) | 2017-11-09 | 2018-11-06 | 鋼管用ねじ継手 |
BR112020006126-3A BR112020006126B1 (pt) | 2017-11-09 | 2018-11-06 | Conexão roscada para tubo de aço |
US16/647,215 US11143337B2 (en) | 2017-11-09 | 2018-11-06 | Threaded connection for steel pipe |
MX2020002973A MX2020002973A (es) | 2017-11-09 | 2018-11-06 | Conexion roscada para tubos de acero. |
PL18876740.4T PL3660378T3 (pl) | 2017-11-09 | 2018-11-06 | Połączenie gwintowe dla rury stalowej |
MYPI2020001072A MY202093A (en) | 2017-11-09 | 2018-11-06 | Threaded connection for steel pipe |
EP18876740.4A EP3660378B1 (en) | 2017-11-09 | 2018-11-06 | Threaded connection for steel pipe |
CN201880062536.2A CN111148930B (zh) | 2017-11-09 | 2018-11-06 | 钢管用螺纹接头 |
EA202090546A EA037765B1 (ru) | 2017-11-09 | 2018-11-06 | Резьбовое соединение для стальной трубы |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2017-216690 | 2017-11-09 | ||
JP2017216690 | 2017-11-09 |
Publications (1)
Publication Number | Publication Date |
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WO2019093311A1 true WO2019093311A1 (ja) | 2019-05-16 |
Family
ID=66438450
Family Applications (1)
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PCT/JP2018/041148 WO2019093311A1 (ja) | 2017-11-09 | 2018-11-06 | 鋼管用ねじ継手 |
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US (1) | US11143337B2 (ja) |
EP (1) | EP3660378B1 (ja) |
JP (1) | JP6804664B2 (ja) |
CN (1) | CN111148930B (ja) |
AU (1) | AU2018364919B2 (ja) |
BR (1) | BR112020006126B1 (ja) |
CA (1) | CA3080458C (ja) |
EA (1) | EA037765B1 (ja) |
MX (1) | MX2020002973A (ja) |
MY (1) | MY202093A (ja) |
PL (1) | PL3660378T3 (ja) |
UA (1) | UA123131C2 (ja) |
WO (1) | WO2019093311A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN113027350A (zh) * | 2021-05-10 | 2021-06-25 | 中海油能源发展股份有限公司工程技术分公司 | 一种无热点隔热油管管柱结构 |
JPWO2021145162A1 (ja) * | 2020-01-17 | 2021-07-22 | ||
WO2024171497A1 (ja) * | 2023-02-13 | 2024-08-22 | 日本製鉄株式会社 | 鋼管用ねじ継手 |
WO2024171885A1 (ja) * | 2023-02-13 | 2024-08-22 | 日本製鉄株式会社 | ねじ継手 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3594548B1 (en) * | 2017-03-08 | 2022-06-15 | Nippon Steel Corporation | Threaded joint for oil well pipe |
BR112019020896B1 (pt) * | 2017-05-22 | 2023-01-24 | Nippon Steel Corporation | Conexão roscada para tubos de aço |
US11313181B2 (en) * | 2017-10-25 | 2022-04-26 | Nippon Steel Corporation | Threaded connection for steel pipe |
US20230349241A1 (en) * | 2022-04-27 | 2023-11-02 | Saudi Arabian Oil Company | Tubular Coupling Assembly With Modified Buttress Thread |
US11940064B2 (en) | 2022-06-17 | 2024-03-26 | Saudi Arabian Oil Company | Threaded tubular connection |
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- 2018-11-06 UA UAA202001922A patent/UA123131C2/uk unknown
- 2018-11-06 WO PCT/JP2018/041148 patent/WO2019093311A1/ja unknown
- 2018-11-06 MY MYPI2020001072A patent/MY202093A/en unknown
- 2018-11-06 JP JP2019552799A patent/JP6804664B2/ja active Active
- 2018-11-06 AU AU2018364919A patent/AU2018364919B2/en active Active
- 2018-11-06 PL PL18876740.4T patent/PL3660378T3/pl unknown
- 2018-11-06 CA CA3080458A patent/CA3080458C/en active Active
- 2018-11-06 US US16/647,215 patent/US11143337B2/en active Active
- 2018-11-06 BR BR112020006126-3A patent/BR112020006126B1/pt active IP Right Grant
- 2018-11-06 MX MX2020002973A patent/MX2020002973A/es unknown
- 2018-11-06 EA EA202090546A patent/EA037765B1/ru unknown
- 2018-11-06 CN CN201880062536.2A patent/CN111148930B/zh active Active
- 2018-11-06 EP EP18876740.4A patent/EP3660378B1/en active Active
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPWO2021145162A1 (ja) * | 2020-01-17 | 2021-07-22 | ||
WO2021145162A1 (ja) * | 2020-01-17 | 2021-07-22 | 日本製鉄株式会社 | 管用ねじ継手 |
JP7431863B2 (ja) | 2020-01-17 | 2024-02-15 | 日本製鉄株式会社 | 管用ねじ継手 |
US12007045B2 (en) | 2020-01-17 | 2024-06-11 | Nippon Steel Corporation | Threaded connection for pipe |
CN113027350A (zh) * | 2021-05-10 | 2021-06-25 | 中海油能源发展股份有限公司工程技术分公司 | 一种无热点隔热油管管柱结构 |
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WO2024171885A1 (ja) * | 2023-02-13 | 2024-08-22 | 日本製鉄株式会社 | ねじ継手 |
Also Published As
Publication number | Publication date |
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EA037765B1 (ru) | 2021-05-19 |
CA3080458C (en) | 2022-06-21 |
EP3660378A4 (en) | 2020-11-18 |
JPWO2019093311A1 (ja) | 2020-04-02 |
PL3660378T3 (pl) | 2023-04-24 |
MY202093A (en) | 2024-04-03 |
EA202090546A1 (ru) | 2020-08-17 |
US11143337B2 (en) | 2021-10-12 |
AU2018364919A1 (en) | 2020-05-14 |
EP3660378A1 (en) | 2020-06-03 |
CN111148930A (zh) | 2020-05-12 |
US20200278056A1 (en) | 2020-09-03 |
JP6804664B2 (ja) | 2020-12-23 |
CA3080458A1 (en) | 2019-05-16 |
BR112020006126B1 (pt) | 2023-04-18 |
EP3660378B1 (en) | 2022-12-28 |
BR112020006126A2 (pt) | 2020-09-24 |
MX2020002973A (es) | 2020-07-22 |
AU2018364919B2 (en) | 2021-04-15 |
CN111148930B (zh) | 2021-10-01 |
UA123131C2 (uk) | 2021-02-17 |
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