发明名称 |
CONTROLLING THE FORCE APPLIED TO A DRILL BIT WHILE DRILLING |
摘要 |
A method of apparatus for controlling in a wellbore the force applied to a rotating drill bit of the type having fluid circulating through an opening in the lower end thereof. One aspect of the method comprises sensing the torque in the drill bit and varying the flow of the circulating fluid through the drill bit responsive to the torque. Apparatus is provided for maintaining constant torque in the drill bit by varying the fluid flow through the bit, which varies in turn the weight applied to the bit and therefore bit torque. |
申请公布号 |
GB2183272(A) |
申请公布日期 |
1987.06.03 |
申请号 |
GB19860026784 |
申请日期 |
1986.11.10 |
申请人 |
* AMOCO CORPORATION |
发明人 |
JAMES FORD * BRETT;TOMMY MELVIN * WARREN;WARREN JEFFERY * WINTERS |
分类号 |
E21B4/02;E21B44/00;(IPC1-7):E21B44/00 |
主分类号 |
E21B4/02 |
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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