关键词: 可调角度 , 弯钻杆 , 打捞 ,  藏鱼头 , 研制

Abstract: In the processing of downhole accidents especially reservoir head accident, the fish head was not in the middle of the hole, and even attached to the variation of well radius was big. Therefore it was very difficult to implement common fishing method. On the site flexible elbow joints and bending drill pipes were generally to use to look for the fish. It would bend drill pipes many times, then cause waste and even safety accidents. According to this situation, the adjustableangle bend drill pipe was designed. It consisted of top connection, spline body, adjustable sleeve and lowercontact and so on. By adjusting spline body and adjustable sleeve, 0°～4°angle adjustment could be finished. The model machine of the adjustableangle bend drill pipe had been manufactured and applied to many oil wells. The results showed that it was available that the adjustableangle bend drill pipe was applied to fish the fishing head, which was easy to adjust the pipe on wellhead. The application was successful and 300 thousands could be saved per well.

Key words: Adjustable angle, Bend drill pipe, Fishing, Hiding fishing head, Development