专利名称：DRILLING METHOD
发明人：METCALFE, Paul David,SIMPSON, Neil
Andrew Abercrombie
申请号：EP99962308.5申请日：19991222公开号：EP1141517B1公开日：20041208
摘要：A drilling method comprises: mounting a drill bit on a drill string including asection of expandable tubing; providing a tubing expander in the string; rotating the drillbit and advancing the drill string through a bore; locating the expandable tubing in thebore; passing the expander through the expandable tubing to expand the tubing; andretreiving the drill bit from the bore, through the expanded tubing.
申请人：WEATHERFORD LAMB
地址：US
国籍：US
代理机构：Harding, Richard Patrick
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