发明名称 |
WELLBORE COMMUNICATION SYSTEM |
摘要 |
A gap collar for an electromagnetic communication unit of a downhole to ol positioned in a wellbore is provided. The downhole tool communicates with a surface unit via an electromagnetic field generated by the electromagnetic communication unit. The gap collar includes a first collar having a first end connector and a second collar having a second end connector matingly connectable to the first end connector. The gap colla r further includes a non-conductive insulation coating disposed on the first and/or second end connectors, and a non-conductive insulation molding positioned about an inne r and/or outer surface of the collars. The insulation molding moldingly conforms to the sha pe collars. The connectors are provided with mated threads modified to receive the insulatio n coating. Measurements taken by the downhole tool may be stored in memory, and transmitted to the surface unit via the electromagnetic field.
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申请公布号 |
CA2495170(A1) |
申请公布日期 |
2005.07.29 |
申请号 |
CA20052495170 |
申请日期 |
2005.01.27 |
申请人 |
SCHLUMBERGER CANADA LIMITED |
发明人 |
QINGYAN, HE;LOVELL, JOHN;SHRAY, FRANK |
分类号 |
E21B17/00;E21B47/12;F16L25/02;G01V11/00;(IPC1-7):E21B47/12;E21B17/16;G01V3/34 |
主分类号 |
E21B17/00 |
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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