发明名称 |
WELL TOOL HAVING MAGNETICALLY COUPLED POSITION SENSOR |
摘要 |
A well tool having a magnetically coupled position sensor. In operation of a well, tool, relative displacement is produced between members of the well tool. A magnetically coupled position sensor includes one magnet assembly attached to a member for displacement therewith and another magnet assembly movably attached to the other member and magnetically coupled to the first magnet assembly for displacement therewith. The position sensor further includes a magnetically permeable material which increases a magnetic flux density between the magnet assemblies. In another position sensor, one magnet assembly includes a magnet having a pole axis, the other magnet assembly includes another magnet having another pole axis, and the pole axes are aligned with each other. |
申请公布号 |
WO2007084132(A1) |
申请公布日期 |
2007.07.26 |
申请号 |
WO2006US02118 |
申请日期 |
2006.01.23 |
申请人 |
WELLDYNAMICS, INC.;GISSLER, ROBERT, W. |
发明人 |
GISSLER, ROBERT, W. |
分类号 |
E21B34/00;E21B43/119;G01B7/14 |
主分类号 |
E21B34/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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