| 发明名称 |
MEASUREMENT OF CURVATURE OF A SUBSURFACE BOREHOLE, AND USE OF SUCH MEASUREMENT IN DIRECTIONAL DRILLING |
| 摘要 |
The present invention provides methods of measuring downhole the curvature of a borehole and, in a particular application of the invention, using the curvature information as an input component of a bias signal for controlling operation of a downhole bias unit in a directional drilling assembly.
|
| 申请公布号 |
WO03016677(A1) |
申请公布日期 |
2003.02.27 |
| 申请号 |
WO2002GB03667 |
申请日期 |
2002.08.09 |
| 申请人 |
CAMCO INTERNATIONAL (UK) LIMITED |
发明人 |
BARR, JOHN, DENZIL;DOWNTON, GEOFF |
| 分类号 |
E21B47/022;(IPC1-7):E21B47/00 |
主分类号 |
E21B47/022 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
