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Current content: 157 337 350 patent documents

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219 431 new documents added

1 247 852 documents amended

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EP 0323772 B1 19920318 - DRILL STRING STABILIZER WITH A CLUTCH FOR ROTATION

Title (en)

DRILL STRING STABILIZER WITH A CLUTCH FOR ROTATION

Publication

EP 0323772 B1 19920318 (FR)

Application

EP 88403113 A 19881208

Priority

FR 8718088 A 19871223

Abstract (en)

[origin: EP0323772A1] The present invention relates to a device (1) for the centring of a lining, especially for a borehole, comprising at least one centring member (6, 2), relative to which said lining can rotate. This device is characterised in that it comprises progressive means (23, 24) for driving this member (6, 2) in rotation with said lining. <IMAGE>

IPC 1-7

E21B 17/10

IPC 8 full level

E21B 17/02 (2006.01); E21B 17/10 (2006.01)

CPC (source: EP US)

E21B 17/1064 (2013.01 - EP US)

Designated contracting state (EPC)

DE FR GB IT

DOCDB simple family (publication)

EP 0323772 A1 19890712; EP 0323772 B1 19920318; DE 3869373 D1 19920423; FR 2625253 A1 19890630; NO 885690 D0 19881221; NO 885690 L 19890626; US 4989679 A 19910205

DOCDB simple family (application)

EP 88403113 A 19881208; DE 3869373 T 19881208; FR 8718088 A 19871223; NO 885690 A 19881221; US 28808688 A 19881222