EP 0857855 A1 19980812 - 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
Application
Priority
EP 97300746 A 19970206
Abstract (en)
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
IPC 8 full level
E21B 47/022 (2012.01)
CPC (source: EP)
E21B 47/022 (2013.01)
Citation (search report)
- [A] US 5163521 A 19921117 - PUSTANYK RANDAL H [CA], et al
- [A] GB 2086055 A 19820506 - SUNDSTRAND DATA CONTROL
- [A] SOVIET INVENTIONS ILLUSTRATED Section Ch Week 8922, 12 July 1989 Derwent World Patents Index; Class H01, AN 89-163786, XP002033024
- [A] SOVIET INVENTIONS ILLUSTRATED Section Ch Week 8111, 22 April 1981 Derwent World Patents Index; Class H01, AN 81-19052D, XP002033025
Designated contracting state (EPC)
FR GB NL
DOCDB simple family (publication)
DOCDB simple family (application)
EP 97300746 A 19970206