Patent · US Expired

Formation pressure testing apparatus with flexible member and method of formation pressure testing

US7416023B2 · kind B2 · utility

10Cited by

18References

27Claims

0Family size

Assignee

Baker Hughes Holdings LLC · US

Inventors

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

Key dates

Filing date	Jun 18, 2004
Grant date	Aug 26, 2008
Priority date	—
Expiry date	Apr 18, 2025

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B49/10
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

An apparatus and method for use in determining pressure at a formation of interest in-situ. A carrier carrying a tool is conveyed in a borehole. The tool includes a sealing member and a port exposable to the formation of interest. A formation fluid sampling chamber is separated from a hydraulic fluid chamber by a flexible member that allows pressure communication from the fluid sampling chamber to the hydraulic fluid chamber. A sensor senses pressure in the hydraulic fluid for determining pressure in the sampling chamber.

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