EP 3228809 A1 20171011 - STEERING JOINT FOR A STEERABLE DRILLING SYSTEM
Title (en)
STEERING JOINT FOR A STEERABLE DRILLING SYSTEM
Title (de)
LENKVERBINDUNG FÜR EIN LENKBARES BOHRSYSTEM
Title (fr)
JOINT DE DIRECTION POUR UN SYSTÈME DE FORAGE ORIENTABLE
Publication
Application
Priority
EP 16164116 A 20160406
Abstract (en)
The invention relates to a steering joint (3) for a steerable drilling system, comprising an upper tubular (301) and a lower tubular (302) connected by a universal joint (303) which allows the upper tubular (301) to bend with respect to the lower tubular (302), wherein the universal joint (303) comprises a joint bearing socket (306) with a hollow core, comprising axially protruding cams (311) with identical extension on a substantially ringshaped face end, a cylindrical and rotatable step piston (308) with a hollow core and radial grooves (312) on a substantially ring-shaped face end, wherein the cams (311) and the grooves (312) are arranged in such a way to provide a positive force-fitting connection of the bearing socket (306) with the step piston (308), and wherein the grooves (312) are of different depth and their bases define inclined planes with respect to the plane of the face end of the step piston (308), so that the upper tubular (301) and the lower tubular (302) can be tilted with respect to each other at predefined steering angles. The invention further relates to the use of such a steering joint in a drilling system, and a drilling system with such a steering joint.
IPC 8 full level
E21B 7/06 (2006.01)
CPC (source: EP)
E21B 7/067 (2013.01); E21B 7/068 (2013.01)
Citation (search report)
- [A] US 5232058 A 19930803 - MORIN PIERRE [FR], et al
- [A] US 2014251695 A1 20140911 - MARCHAND NICHOLAS RYAN [CA], et al
- [A] US 2011140411 A1 20110616 - MARCHAND NICHOLAS RYAN [CA]
- [A] US 4813497 A 19890321 - WENZEL KENNETH H [CA]
- [A] US 2014262530 A1 20140918 - PETROVIC JOHN [CA], et al
- [A] US 5474334 A 19951212 - EPPINK JAY M [US]
- [A] US 3743034 A 19730703 - BRADLEY W
- [A] EP 1923534 A1 20080521 - BAKER HUGHES INC [US]
- [A] US 2005098350 A1 20050512 - EPPINK JAY M [US], et al
- [A] GB 2026063 A 19800130 - INST FRANCAIS DU PETROLE
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 3228809 A1 20171011; EP 3228809 B1 20181205; WO 2017174482 A1 20171012
DOCDB simple family (application)
EP 16164116 A 20160406; EP 2017057809 W 20170403