发明名称 |
METHOD AND APPARATUS FOR LOCATING WELL CASINGS FROM AN ADJACENT WELLBORE |
摘要 |
A wellbore tool for locating a target wellbore containing a conductive member from a second wellbore and directing the trajectory of the second wellbore relative to the target wellbore includes an electric current driver having an insulated gap; a three-axis magnetometer positioned within a non-magnetic housing that is disposed within a non-magnetic tubular, the three-axis magnetometer positioned below the electric current driver; a drill bit positioned below the three-axis magnetometer; a hollow tubular connected between the electric current driver and the three-axis magnetometer; and a measurement-while-drilling tool. The current driver generates an electric current across the gap to the portion of the tool below the insulated gap. In a method a current is generated across the insulated gap to the portion of the tool below the insulated gap to the conductive material in the target wellbore returning to a portion of the bottom hole assembly above the insulated gap thereby producing a target magnetic field. Measuring the target magnetic field at the bottom hole assembly and the earth's magnetic field; and determining the position of the second wellbore relative to the target wellbore. Then steering the bottom hole assembly to drill the second wellbore along a trajectory relative to the target wellbore.
|
申请公布号 |
US2011018542(A1) |
申请公布日期 |
2011.01.27 |
申请号 |
US20100897203 |
申请日期 |
2010.10.04 |
申请人 |
CLARK BRIAN;DUPUIS CHRISTOPHE;MINERBO GERALD N |
发明人 |
CLARK BRIAN;DUPUIS CHRISTOPHE;MINERBO GERALD N. |
分类号 |
G01V3/08 |
主分类号 |
G01V3/08 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|