Global Patent Index - EP 0994234 A3

EP 0994234 A3 2001-04-04 - Rotating head of a drilling column with clutch coupling

Title (en)

Rotating head of a drilling column with clutch coupling

Title (de)

Drehbohrkopf mit Kupplungs-Verbindung

Title (fr)

Tête rotative de forage avec connecteur-embrayage

Publication

EP 0994234 A3 (EN)

Application

EP 99830602 A

Priority

IT RM980652 A

Abstract (en)

[origin: EP0994234A2] The present invention relates to a rotating head of a drilling column with clutch coupling. It comprises at least a motor assembly (2, 3) including in cascade a first hydraulic motor (7), a reduction set (8) with hydraulically commanded clutch coupling (15), a pinion (9) engaged with a crown gear (6) of a structure (1) supporting the rotating head. Even a single motor group (2) further bears, joined coaxially to the side opposite to the first hydraulic motor (7), a second hydraulic motor (10) and a reduction gear (11) connected to the pinion (9) to the side opposite the reduction set (8). <IMAGE>

IPC 1-7 (main, further and additional classification)

E21B 3/02

IPC 8 full level (invention and additional information)

E21B 3/02 (2006.01)

CPC (invention and additional information)

E21B 3/02 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

EP 0994234 A2 20000419; EP 0994234 A3 20010404; EP 0994234 B1 20040519; AT 267337 T 20040615; DE 69917406 D1 20040624; IT 1302379 B1 20000905; IT RM980652 A1 20000417

INPADOC legal status


2008-01-02 [PG25 PT] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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2005-06-29 [REG IE MM4A] PATENT LAPSED

2005-05-13 [EN] FR: TRANSLATION NOT FILED

2005-05-11 [26N] NO OPPOSITION FILED

- Effective date: 20050222

2005-05-11 [GBPC] GB: EUROPEAN PATENT CEASED THROUGH NON-PAYMENT OF RENEWAL FEE

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2004-11-30 [REG CH PL] PATENT CEASED

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