Patent · US Expired

Method for cleaning and sealing a well borehole portion for formation evaluation

US6763884B2 · kind B2 · utility

6Cited by

4References

8Claims

0Family size

Assignee

Baker Hughes Holdings LLC · US

Inventors

Matthias Meister · Celle, DE
Wolfgang E. Herberg · Waggum, DE
Sven Krueger · Trossingen, DE

Key dates

Filing date	Oct 24, 2002
Grant date	Jul 20, 2004
Priority date	—
Expiry date	Nov 14, 2022

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B37/00
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A borehole wall cleaning apparatus and method for obtaining an improved seal between a fluid sampling device and a portion of the borehole wall. Clean drilling fluid is pumped into a drilling tool using a mud pump. A fluid diverter in the tool diverts all or part of the clean drilling fluid through a port to clear a portion of a borehole wall. A sealing pad is moved against the clean portion. A sampling port is exposed to the sealed portion for sampling and/or testing fluid from the formation.

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