EP 0162190 B1 19891206 - DEVICE FOR OPTIONALLY DRILLING UNDER-GROUND FORMATIONS, STRAIGHT OR DIRECTIONALLY
Title (en)
DEVICE FOR OPTIONALLY DRILLING UNDER-GROUND FORMATIONS, STRAIGHT OR DIRECTIONALLY
Publication
Application
Priority
DE 3403239 A 19840131
Abstract (en)
[origin: US4610307A] A device for use in underground drilling comprising: a tubular housing, a down-hole motor mounted within the housing and having an output shaft, means for connecting said output shaft to a drill bit, means for connecting said housing to a drill string, first and second stabilizers mounted on said housing, said first stabilizer being mounted nearer than the second stabilizer to the output shaft connecting means, at least one of said stabilizers being an eccentric stabilizer, and at least one stress relieving means between the first stabilizer and the means for connecting the housing to the drill string.
IPC 1-7
IPC 8 full level
E21B 4/00 (2006.01); E21B 7/06 (2006.01); E21B 7/10 (2006.01); E21B 17/10 (2006.01); E21B 17/20 (2006.01)
CPC (source: EP US)
E21B 7/068 (2013.01 - EP US); E21B 7/10 (2013.01 - EP US); E21B 17/20 (2013.01 - EP US)
Designated contracting state (EPC)
BE FR GB NL
DOCDB simple family (publication)
DE 3403239 C1 19850627; AU 3777185 A 19850808; AU 572621 B2 19880512; CA 1236825 A 19880517; EP 0162190 A1 19851127; EP 0162190 B1 19891206; JP S60164592 A 19850827; US 4610307 A 19860909
DOCDB simple family (application)
DE 3403239 A 19840131; AU 3777185 A 19850118; CA 473135 A 19850130; EP 85100936 A 19850130; JP 1112085 A 19850125; US 81089585 A 19851218