Sensing formation properties during wellbore construction
US10774637B2 · kind B2 · utility
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5References
20Claims
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Key dates
| Filing date | Oct 25, 2017 |
| Grant date | Sep 15, 2020 |
| Priority date | — |
| Expiry date | Jun 14, 2038 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B49/005
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Systems and methods are disclosed that provide highly accurate and controllable measurements of rock formation properties in a wellbore. The systems and methods utilize a prescribed input signal to mechanically perturb a drill string in contact with a rock formation in order to elicit a mechanical response. Based on the input signal and the mechanical response, a transfer function is computed and analyzed, wherein the analysis uses estimates of the drill string resonances to identify rock formation resonances, which are used, in turn, to determine the rock formation properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.