发明名称 |
Electromagnetic ranging source suitable for use in a drill string |
摘要 |
An electromagnetic ranging source embodiment includes: a tubular body having a circumference; a ferromagnetic core conforming to the tubular body and extending at least halfway around the circumference to define a gap with circumferentially-spaced poles; one or more current-carrying windings around the core to induce a magnetic field between the poles; and a downhole power source that drives the one or more current-carrying windings. A method embodiment includes: equipping a first drill string with such an electromagnetic ranging source; extending a first borehole with the first drill string; assembling a second drill string with sensors; and drilling a second borehole while using said sensors to guide the second drill string relative to the first borehole. |
申请公布号 |
GB2542073(A) |
申请公布日期 |
2017.03.08 |
申请号 |
GB20160022209 |
申请日期 |
2014.07.18 |
申请人 |
Halliburton Energy Services, Inc. |
发明人 |
Doug Derr;Andrew J. Cuthbert;Joe E Hess |
分类号 |
G01V3/18;E21B47/01;E21B47/022 |
主分类号 |
G01V3/18 |
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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