Drill bit, method for arranging passage for installing wear monitor in drill bit and method for installing wear display in drill bit |
|||||||
| 申请号 | JP29445388 | 申请日 | 1988-11-21 | 公开(公告)号 | JPH01230890A | 公开(公告)日 | 1989-09-14 |
| 申请人 | Exxon Prod Res Co; | 发明人 | ARUBAATO PURAMAA DEIBUISU JIYU; JIYOSEFU UEIN SUTOORU; | ||||
| 摘要 | PURPOSE: To properly select bit replacing time by forming a wear monitor installing passage in a drill bit by using a guide element, and monitoring wear of a cone support part detected by a wear sensor. CONSTITUTION: A passage 16 of a linkage 18 reaching a wear display 12 from a support part of a cone 14 is formed in a large radius of curvature by using a guide element 30. Next, wear of a bearing detected by a wear sensor 38 arranged in the support part of the cone 14 is monitored by a flow resistance changing means 40 and the wear display 12 via the linkage 18. When the wear exceeds a prescribed value, the flow resistance changing means 40 is energized, and a flow rate and sending-out pressure of a drilling fluid largely change. When detecting this change by a drilling rig, a drill string is pulled up by an operator so that a drill bit 10 is replaced. COPYRIGHT: (C)1989,JPO |
||||||
| 权利要求 | |||||||
| 说明书全文 | |||||||
QQ群二维码
意见反馈
意见反馈