发明名称 |
METHODS AND APPARATUS FOR DRILLING DIRECTIONAL WELLS BY PERCUSSION METHOD |
摘要 |
The present invention generally relates to methods and apparatus for impact drilling. A drilling tool with a housing and a piston is provided. The drilling tool may be configured to impact while simultaneously rotating a drill head, independent from the rotation of a drill string. The drilling tool may include a rolling key assembly disposed between the housing and the piston that includes a bearing adapted to roll during a first direction of the piston and slide during a second direction of the piston. The drilling tool may include a clutch mechanism configured to rotate the drill head as the piston is directed in the first direction.
|
申请公布号 |
US2009200082(A1) |
申请公布日期 |
2009.08.13 |
申请号 |
US20080028403 |
申请日期 |
2008.02.08 |
申请人 |
BUI HUY D;JAVINS BROOKS HOWARD |
发明人 |
BUI HUY D.;JAVINS BROOKS HOWARD |
分类号 |
E21B4/10 |
主分类号 |
E21B4/10 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|