发明名称 |
SURVEYING A SUBTERRANEAN BOREHOLE USING ACCELEROMETERS |
摘要 |
A method and apparatus for surveying a subterranean borehole is disclosed which uses two sets of accelerometers (20; 30) joined by a joining structure (10) which prevents relative rotation between the two sets, the whole apparatus being arranged to permit movement along a borehole to one or more survey positions. Each set of accelerometers (20; 30) measures the gravity in at least two directions at its respective positions, and then from these measured values it is possible to calculate the borehole inclination and azimuth. The present invention is particularly suitable for use in areas with high magnetic interference, or for measuring boreholes with low inclinations. Tests of the present invention show that an accuracy similar to that obtained by gyro surveys was achievable.
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申请公布号 |
WO0011316(A1) |
申请公布日期 |
2000.03.02 |
申请号 |
WO1999GB02750 |
申请日期 |
1999.08.19 |
申请人 |
HALLIBURTON ENERGY SERVICES, INC.;MCELHINNEY, GRAHAM |
发明人 |
MCELHINNEY, GRAHAM |
分类号 |
E21B47/022;(IPC1-7):E21B47/022 |
主分类号 |
E21B47/022 |
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