发明名称 |
ANTI-COLLISION METHOD FOR DRILLING WELLS |
摘要 |
Methods for drilling a new well in a field having a plurality of existing cased wells using magnetic ranging while drilling are provided. In accordance with one embodiment, a method of drilling a new well in a field having an existing cased well includes drilling the new well using a bottom hole assembly (BHA) having a drill collar having by an insulated gap, generating a current on the BHA while drilling the new well, such that some of the current passes through a surrounding formation and travels along a casing of the existing cased well, measuring from the BHA a magnetic field caused by the current traveling along the casing of the existing cased well, and adjusting a trajectory of the BHA to avoid a collision between the new well and the existing cased well based on measurements of the magnetic field.
|
申请公布号 |
CA2693798(A1) |
申请公布日期 |
2009.01.29 |
申请号 |
CA20082693798 |
申请日期 |
2008.06.24 |
申请人 |
SCHLUMBERGER CANADA LIMITED |
发明人 |
CLARK, BRIAN;PHILLIPS, WAYNE J.;POEDJONO, BENNY |
分类号 |
E21B47/022;E21B47/024;E21B47/09;G01V3/26 |
主分类号 |
E21B47/022 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|