Patent · US Active

Analyzing resistivity images for determining downhole events and removing image artifacts

US7823658B2 · kind B2 · utility

3Cited by

9References

18Claims

0Family size

Assignee

Baker Hughes Holdings LLC · US

Inventors

Andreas Hartmann · Stadtbergen, DE
Christian Fulda · Sulingen, DE
Dmitriy Dashevskiy · Bad Doberan, DE
Stephan Dankers · Wunstorf, DE

Key dates

Filing date	May 9, 2008
Grant date	Nov 2, 2010
Priority date	—
Expiry date	Aug 13, 2028

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B47/04
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

Borehole images obtained with MWD measurements have a mismatch with subsequent images obtained when measurements are repeated over the same depth interval after the drillstring has been raised up. The difference is attributable to stretch of the drillstring. This can be estimated by correlating the two images. The difference can also be estimated by monitoring drilling conditions such as RPM, WOB and torque on reentry.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.