Device and method of determining rate of penetration and rate of rotation
US8571796B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2010 |
| Grant date | Oct 29, 2013 |
| Priority date | — |
| Expiry date | Oct 16, 2031 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B45/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Methods and devices for determining a rate of penetration and/or rate of rotation for a drilling assembly or logging tool while drilling or logging a wellbore are provided. The methods can include the steps of:at respective first and second time instant, acquiring and storing a first logging data frame using a first array of sensors and a second logging data frame using a second array of sensors where wherein the logging data relate to at least one property of a zone surrounding the wellbore and the second logging data frame overlaps at least partially the first logging data frame;comparing the first and second logging data frames;determining a relative change in depth and/or azimuth between the first and second logging data frames; andcalculating the rate of penetration and/or rate of rotation based on the relative change in depth and/or azimuth determined and a difference between the first and second time instants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.