Downhole rate of penetration sensor assembly and method
US7058512B2 · kind B2 · utility
16Cited by
1References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 4, 2005 |
| Grant date | Jun 6, 2006 |
| Priority date | — |
| Expiry date | Mar 4, 2025 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B45/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Methods and apparatuses to determine the rate of penetration of a subterranean drilling assembly into a formation are disclosed. The methods and apparatuses generate rate of penetration by integration axial acceleration data with respect to time and applying a correction factor. The correction factor, meant to account for the effect of gravity on the acceleration data, is determined when rotational velocity of the drilling assembly relative to the formation is zero.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.