| 发明名称 | Downhole tractor | ||
| 摘要 | A method of translating a member through a bore involving moving fluid through a tubular member such as a drill string, and generating impulses on the member by varying the passage of fluid through the member using a valve which opens at a first rate and closes at a different second rate to urge the member to advance in a selected direction. The valve may close quickly and open slowly, or may close slowly and open quickly. | ||
| 申请公布号 | US9004194(B2) | 申请公布日期 | 2015.04.14 |
| 申请号 | US201013508982 | 申请日期 | 2010.11.10 |
| 申请人 | National Oilwell Varco, L.P. | 发明人 | Eddison Alan Martyn;Coull David Anderson;Stuart Derek James |
| 分类号 | E21B7/24;E21B4/18 | 主分类号 | E21B7/24 |
| 代理机构 | JL Salazar Law Firm | 代理人 | JL Salazar Law Firm |
| 主权项 | 1. A method of translating a member through a bore, the method comprising: moving fluid through a tubular member located in the bore; generating impulses on the member by varying passage of fluid through the member by opening a flow passage at a first rate and closing the flow passage at a different second rate to urge the member to advance in a selected direction; and operating a valve to interrupt flow of the fluid. | ||
| 地址 | Houston TX US | ||