发明名称 |
DRILL BIT WITH WEAR INDICATION |
摘要 |
An earth drilling bit incorporating a tensioned linkage type bit wear indicator. A tensioned linkage extends through the bit between a wear sensor and a device for altering the resistance of the bit to receiving drilling fluid from the drill string. On detecting a predetermined degree of wear, the wear sensor releases the tension in the tensioned linkage. This activates the flow resistance altering device, causing the flow rate and/or pumping pressure of the drilling fluid to change. The tensioned linkage passes through two intersecting passageways in the bit. A guide element is inserted at the intersection of the two intersecting passageways. The guide element routes the tensioned linkage between the two passageways. |
申请公布号 |
GB2216576(A) |
申请公布日期 |
1989.10.11 |
申请号 |
GB19890005583 |
申请日期 |
1989.03.10 |
申请人 |
* EXXON PRODUCTION RESEARCH COMPANY |
发明人 |
ALBERT P. * DAVIS,JR.;JOSEPH W * STOLLE |
分类号 |
E21B10/08;E21B10/22;E21B12/02;E21B44/00;F16C19/52 |
主分类号 |
E21B10/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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