| 发明名称 |
DRILLING METHOD |
| 摘要 |
A drilling method comprises: mounting a drill bit on a drill string includin g a section of expandable tubing; providing a tubing expander in the string; rotating the drill bit and advancing the drill string through a bore; locati ng the expandable tubing in the bore; passing the expander through the expandab le tubing to expand the tubing; and retreiving the drill bit from the bore, through the expanded tubing. |
| 申请公布号 |
CA2356130(A1) |
申请公布日期 |
2000.06.29 |
| 申请号 |
CA19992356130 |
申请日期 |
1999.12.22 |
| 申请人 |
WEATHERFORD/LAMB, INC. |
发明人 |
METCALFE, PAUL DAVID;SIMPSON, NEIL ANDREW ABERCROMBIE |
| 分类号 |
B21D17/04;B21D39/04;B21D39/10;B21D41/02;E21B7/00;E21B7/20;E21B19/16;E21B23/00;E21B23/02;E21B23/04;E21B29/00;E21B29/10;E21B33/10;E21B33/13;E21B33/138;E21B33/16;E21B43/08;E21B43/10;(IPC1-7):E21B7/20;E21B10/64 |
主分类号 |
B21D17/04 |
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