Drill bit instrumentation and method for controlling drilling or core-drilling
US5720355A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 25, 1995 |
| Grant date | Feb 24, 1998 |
| Priority date | — |
| Expiry date | Oct 25, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/24
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Bit instrumentation and method for controlling drilling are disclosed that include multiple resistivity sensors 5B and accelerometer sensors 4 disposed within an insert portion 1B of the drill bit 1. The resistivity sensors have a beveled portion to provide an interference fit with a cavity formed within the insert portion 1B of the drill bit. Resistivity sensors 5B may be used to determine the motion of the bit 1 within the wellbore 106 including unstable bit operation such as bit whirling and bit tilting. As well, accelerometer sensors 4 may also be provided in conjunction with the resistivity sensors 5B to provide information concerning motion, accelerations and stresses applied to or within the drill bit 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.