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公开(公告)号:US5282509A
公开(公告)日:1994-02-01
申请号:US933440
申请日:1992-08-20
申请人: Harry W. Schurr, III
发明人: Harry W. Schurr, III
摘要: A procedure for drilling out a cement plug from a liner top using a drill bit with extendible cutting elements to avoid the need for changing bits during the procedure.
摘要翻译: 使用具有可扩展切割元件的钻头从衬垫顶部钻出水泥塞的过程,以避免在过程期间改变钻头的需要。