Patent · US Active

Measurement of downhole component stress and surface conditions

US9057247B2 · kind B2 · utility

160Cited by

33References

16Claims

0Family size

Assignee

Baker Hughes Holdings LLC · US

Inventors

Sunil Kumar · Mathura, IN
Hendrik John · Buchs, CH
Harald Grimmer · Celle, DE
Thomas Kruspe · Braunschweig, DE
Andreas Peter · Celle, DE
Michael Koppe · Erfurt, DE

Key dates

Filing date	Feb 21, 2012
Grant date	Jun 16, 2015
Priority date	—
Expiry date	Jul 7, 2033

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B47/0175
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

An apparatus for measuring strain on a downhole component includes: at least one strain sensitive device disposed proximate to a surface of a component of a drilling assembly or disposed within a material forming the component; and a processor in operable communication with the at least one strain sensitive device, the processor configured to detect changes in the at least one strain sensitive device and detect at least one of erosion, crack formation and crack propagation in the component surface. An apparatus for measuring strain on a downhole component includes: at least one strain gauge deposited on a surface of a drive shaft or disposed within a material forming the drive shaft; and a processor in operable communication with the at least one strain gauge, the processor configured to detect changes in the at least one strain gauge and detect conditions affecting operation of the drive shaft.

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