提出开发特殊螺纹接头套管，以适应我国西部高压深井、超深井以及水平井钻井的要求。
This paper put forward that it is tme to develop special thread for casing to meet the requirement of hi-pressure, extra deep and horizontal Wells.
本发明摆动旋转接头由球型接头体，螺纹接头套，锁紧螺帽，大铜垫和两个球面转环构成。
The swinging rotating joint consists of spherical body, thread joint sleeve, locking screw nut, large copper washer and two spherical rings.
本发明摆动旋转接头由球型接头体，螺纹接头套，锁紧螺帽，大铜垫和两个球面转环构成。
The swinging rotating joint consists of spherical body, thread joint sleeve, locking screw nut, large copper washer and two spherical rings.
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