公开(公告)号：US5370183A

公开(公告)日：1994-12-06

申请号：US105081

申请日：1993-08-11

Applicant: H. Andrew Ellis ,  Erik L. Peterson ,  Randy D. Reynolds

Inventor： H. Andrew Ellis ,  Erik L. Peterson ,  Randy D. Reynolds

IPC: E21B17/05 ,  E21B29/00 ,  E21B29/10

CPC classification number: E21B29/00 ,  E21B17/05 ,  E21B29/10

Abstract: Well casing is repaired using a guide string for maintaining contact with a lower casing section disposed in the well, particularly an open hole portion of such well. The guide string is connected to a swivel and milling tool and lowered into the casing section remaining in the open hole portion of the well for machining the upper end of the casing section. The swivel prevents build-up of angular momentum of the guide string which may decouple the guide string from the milling tool when the milling tool rotatably decelerates or snags during the machining or milling operations. The milling tool and swivel may be retrieved and the guide string, with a safety joint or fishing head, reinserted in the well during installation of a new casing section.

Abstract translation: 使用引导柱修复套管，以保持与布置在井中的下部套管部分的接触，特别是这种井的开孔部分。 引导柱连接到旋转铣削工具并且下降到保持在井的开孔部分中的壳体部分中，用于加工壳体部分的上端。 旋转装置可防止导向柱的角动量的积累，当铣削工具在加工或铣削操作期间可旋转地减速或阻塞时，可将导向柱与铣削刀具分离。 可以取出铣刀和旋转件，并且在安装新的套管部分期间，具有安全接头或钓鱼头的引导柱重新插入井中。