Method for cleaning cement plug from wellbore liner,申请号US19920933440-传众专利搜索

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发明名称	Method for cleaning cement plug from wellbore liner
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.
申请公布号	US5282509(A)	申请公布日期	1994.02.01
申请号	US19920933440	申请日期	1992.08.20
申请人	CONOCO INC.	发明人	SCHURR, III, HARRY W.
分类号	E21B10/32;E21B29/00;E21B37/02;(IPC1-7):E21B29/00	主分类号	E21B10/32
代理机构		代理人
主权项
地址

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