Patent · US Expired

Formation testing while drilling apparatus with axially and spirally mounted ports

US6585045B2 · kind B2 · utility

84Cited by

7References

17Claims

0Family size

Assignee

Baker Hughes Holdings LLC · US

Inventors

Jaedong Lee · Katy, US
John M. Michaels · Irvine, US
Volker Krueger · Celle, DE
Matthias Meister · Celle, DE
Per-Erik Berger · Molde, NO

Key dates

Filing date	Aug 15, 2001
Grant date	Jul 1, 2003
Priority date	—
Expiry date	Aug 15, 2021

Classification

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

Abstract

An apparatus and method for determining permeability of a subterranean formation is provided. The apparatus and method comprise a work string, at least one selectively extendable member mounted on the work string to isolate a portion of the annular space between the work string and borehole. A predetermined distance proportional to the radius of a control port separates at least two ports in the work string. A sensor operatively associated with each port is mounted in the work string for measuring at least one characteristic such as pressure of the fluid in the isolated section.

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