Formation evaluation using estimated borehole tool position
US7548817B2 · kind B2 · utility
9Cited by
9References
19Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 27, 2007 |
| Grant date | Jun 16, 2009 |
| Priority date | — |
| Expiry date | Sep 27, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V11/002
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Caliper measurements made during rotation of a bottomhole assembly are processed to estimate the location of the BHA, and size and shape of the borehole. A piecewise elliptical fitting procedure may be used. These estimates may be used to correct measurements made by a standoff-sensitive formation evaluation sensor such as a neutron porosity tool.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.