发明名称 |
Advanced underground homing system, apparatus and method |
摘要 |
A boring tool that is moved by a drill string to form an underground bore. A transmitter transmits a time varying dipole field as a homing field from the boring tool. A pitch sensor detects a pitch orientation of the boring tool. A homing receiver is positionable at a target location for detecting the homing field to produce a set of flux measurements. A processing arrangement uses the pitch orientation and flux measurements with a determined length of the drill string to determine a vertical homing command for use in controlling depth in directing the boring tool to the target location such that the vertical homing command is generated with a particular accuracy at a given range between the transmitter and the homing receiver and which would otherwise be generated with the particular accuracy for a standard range, different from the particular range. An associated system and method are described.
|
申请公布号 |
US8381836(B2) |
申请公布日期 |
2013.02.26 |
申请号 |
US20100689954 |
申请日期 |
2010.01.19 |
申请人 |
MERLIN TECHNOLOGY INC.;BRUNE GUENTER W.;MERCER JOHN E.;CHAU ALBERT W. |
发明人 |
BRUNE GUENTER W.;MERCER JOHN E.;CHAU ALBERT W. |
分类号 |
E21B44/00 |
主分类号 |
E21B44/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|