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EP 0058061 A2 19820818 - Tools for underground formations.

Title (en)

Tools for underground formations.

Title (de)

Erdbohrwerkzeug.

Title (fr)

Outil de forage pour formation souterraine.

Publication

EP 0058061 A2 19820818 (EN)

Application

EP 82300578 A 19820205

Priority

GB 8103820 A 19810207
GB 8104537 A 19810213

Abstract (en)

A tool for an underground formation e.g. an eccentric hole opener, has an eccentric portion the end face of which has cutting elements, preferably poly-crystalline diamond compacts. According to the invention the elements are distributed about the end face in an arrangement to reduce the imbalance in horizontal cutting forces caused by the eccentricity of the tool.

IPC 1-7

E21B 10/26; E21B 10/46; E21B 10/42; E21B 7/10

IPC 8 full level

E21B 10/26 (2006.01); E21B 10/42 (2006.01); E21B 10/43 (2006.01); E21B 17/10 (2006.01)

CPC (source: EP US)

E21B 10/265 (2020.05 - EP US); E21B 10/43 (2013.01 - EP US); E21B 17/1092 (2013.01 - EP)

Designated contracting state (EPC)

BE CH DE FR GB LI NL

DOCDB simple family (publication)

EP 0058061 A2 19820818; EP 0058061 A3 19820901; NO 820347 L 19820809

DOCDB simple family (application)

EP 82300578 A 19820205; NO 820347 A 19820205