Method and apparatus for measuring mud and formation properties downhole
US6648083B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 2001 |
| Grant date | Nov 18, 2003 |
| Priority date | — |
| Expiry date | Dec 6, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V5/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method is disclosed for determining a characteristic of a mud mixture surrounding a drilling tool within a borehole in which a drilling tool is received. The method includes turning the tool in the borehole. Energy is applied into the borehole from an energy source disposed in the tool. Measurement signals are received at a sensor disposed in the tool from a location around the borehole. The cross-section of the borehole is separated into at least a first sector and a second sector. A first measurement signal from the first sector is substantially in response to returning energy which results from the interaction of the applied energy with the mud mixture. A second measurement signal from the second sector is substantially in response to returning energy which results from the interaction of the applied energy with the formation. An indication of an intrinsic characteristic of the mud mixture is derived from the first measurement signals associated with the first sector of the borehole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.