THREADED JOINT FOR HEAVY-WALLED OIL COUNTRY TUBULAR GOODS

Provided is a threaded joint for heavy-walled oil country tubular goods which can acquire both the ensuring of sealability and the prevention of galling in a state where a high external pressure is also applied to the threaded joint in addition to a high compressive force. A surface of a pin 3 side...

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Bibliographische Detailangaben
Hauptverfasser:	KAWAI, Takamasa, CHIKATSUNE, Hiroshi, TAKANO, Jun, TAKAHASHI, Kazunari, UETA, Masateru, SATO, Hideo, SEKI, Haruhiko, YONEYAMA, Tsuyoshi, YOSHIKAWA, Masaki, NAGAHAMA, Takuya
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING ENGINEERING ELEMENTS AND UNITS FIXED CONSTRUCTIONS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING JOINTS OR FITTINGS FOR PIPES LIGHTING MEANS FOR THERMAL INSULATION IN GENERAL MECHANICAL ENGINEERING MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS PIPES SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	Provided is a threaded joint for heavy-walled oil country tubular goods which can acquire both the ensuring of sealability and the prevention of galling in a state where a high external pressure is also applied to the threaded joint in addition to a high compressive force. A surface of a pin 3 side which forms a seal portion 13 and a surface of a box 1 side which forms a seal portion 11 are formed into a convex curved surface and a tapered surface respectively. With respect to the pin 3, a seal thickness t s of the pin is set to 15 mm or less, a shape parameter t s /D (D: outer diameter of a pin raw pipe portion) is set to 0.045 or more, and a complete thread length ratio L/t (L: complete thread length of the pin, t: wall thickness of the pin raw pipe portion) is set to 4.0 or less.