| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 161 | DRILL BIT WITH CONTINUOUSLY SHARP EDGE CUTTING ELEMENTS | PCT/US2009060413 | 2009-10-13 | WO2010045170A4 | 2010-07-01 | WELCH ROBERT M; MCCLAIN ERIC E; SINOR L ALLEN |
| A method of optimizing drill bit design and an optimized drill bit for drilling a well into an earth formation comprising a bit body; a number of blades spaced around the bit body, each blade having a curved outer edge and a forward face; a first row of cutter pockets recessed into the face along the outer edge of each blade; a second group of cutter pockets recessed into the face of each blade offset from the first row; and a plurality of cutting elements, each cutting element being brazed into a different one of the cutter pockets. | ||||||
| 162 | WELLBORE PRIMARY BARRIER AND RELATED SYSTEMS | PCT/GB0000823 | 2000-03-07 | WO0053887A3 | 2001-01-04 | ROBERTS JOHN D; DRECHSLER JAN; SALVERSEN TOM; UNSGAARD TOM; ENERSTVEDT EIRIK; BLIZZARD WILLIAM A JR; LANGFORD DALE A; CARTER THURMAN B |
| A new wellbore apparatus has been invented which, in certain aspects, has anchor apparatus (42) for anchoring the wellbore apparatus in a bore, the anchor apparatus actuated by fluid under pressure supplied thereto, and sealing apparatus (40) selectively inflatable to close off the bore to fluid flow there through, and temperature compensating apparatus (48) for maintaining a desired fluid pressure in the sealing apparatus to prevent it from bursting or deflating. | ||||||
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