Global Patent Index - EP 0857855 B1

EP 0857855 B1 20020911 - Downhole directional measurement system

Title (en)

Downhole directional measurement system

Title (de)

Bohrlochrichtungsmesssystem

Title (fr)

Système de mesure de la direction d'un puits de forage

Publication

EP 0857855 B1 20020911 (EN)

Application

EP 97300746 A 19970206

Priority

EP 97300746 A 19970206

Abstract (en)

[origin: EP0857855A1] A downhole directional measurement system to determine an inclination angle θ of a wellbore at a point in either a definable vicinity of the wellbore bottom or in a projected path of the wellbore. The system comprises: a first inclinometer (39) for measuring an inclination angle alpha , and producing an output signal indicative thereof, and a second inclinometer (80) for measuring an inclination angle beta , and producing an output signal indicative thereof. The system is capable of determining the inclination angle θ of the wellbore by extrapolation based upon said inclination angle alpha and said inclination angle beta . <IMAGE>

IPC 1-7

E21B 47/022

IPC 8 full level

E21B 47/022 (2012.01)

CPC (source: EP)

E21B 47/022 (2013.01)

Designated contracting state (EPC)

FR GB NL

DOCDB simple family (publication)

EP 0857855 A1 19980812; EP 0857855 B1 20020911

DOCDB simple family (application)

EP 97300746 A 19970206