EP 2976486 A4 20161109 - DRILLING EQUIPMENT DEVICE ESPECIALLY ARRANGED FOR REAMING A BOREHOLE IN A ROCK FORMATION AND METHOD OF REAMING A BOREHOLE IN A ROCK FORMATION
Title (en)
DRILLING EQUIPMENT DEVICE ESPECIALLY ARRANGED FOR REAMING A BOREHOLE IN A ROCK FORMATION AND METHOD OF REAMING A BOREHOLE IN A ROCK FORMATION
Title (de)
BOHRAUSRÜSTUNG, INSBESONDERE ZUM AUSWEITEN EINES BOHRLOCHS IN EINER GESTEINSFORMATION, UND VERFAHREN ZUM AUSWEITEN EINES BOHRLOCHS IN EINER GESTEINSFORMATION
Title (fr)
DISPOSITIF D'ÉQUIPEMENT DE FORAGE SPÉCIALEMENT CONÇU POUR ALÉSER UN TROU DE FORAGE DANS UNE FORMATION ROCHEUSE ET PROCÉDÉ D'ALÉSAGE D'UN TROU DE FORAGE DANS UNE FORMATION ROCHEUSE
Publication
Application
Priority
- NO 20130420 A 20130322
- NO 20140315 A 20140312
- NO 2014050040 W 20140318
Abstract (en)
[origin: WO2014158026A1] A drilling equipment device (2') for use when reaming a pilot hole (13) in a rock formation (1), in which a drilling unit (2) comprises a rotatable drill-bit structure (15) fitted with roller cutters (12) which are arranged to break up the rock formation (1), the drill-bit structure (15) and an associated housing (16) being supported on a drill stem (21) which is connected in a rotationally rigid manner to a non-rotatable drill string (4). A method of reaming a pilot hole (13) in a rock formation (1) is described as well.
IPC 8 full level
E21B 7/28 (2006.01); E21B 4/00 (2006.01); E21B 4/04 (2006.01); E21B 7/30 (2006.01); E21B 10/08 (2006.01); E21B 10/28 (2006.01)
CPC (source: EP US)
E21B 4/006 (2013.01 - EP); E21B 4/04 (2013.01 - EP); E21B 7/28 (2013.01 - EP); E21B 7/30 (2013.01 - EP); E21B 10/08 (2013.01 - EP); E21B 10/28 (2013.01 - EP US)
Citation (search report)
- [XY] US 3508620 A 19700428 - PENNINGTON JAMES RONALD
- [IY] US 4117895 A 19781003 - WARD HOWARD, et al
- [YA] WO 9320325 A1 19931014 - ROBBINS CO [US]
- [Y] US 5092411 A 19920303 - HAUSHERR HEINRICH-RUDOLF [DE], et al
- [A] US 4381038 A 19830426 - SUGDEN DAVID B [AU]
- See also references of WO 2014158026A1
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
DOCDB simple family (publication)
WO 2014158026 A1 20141002; EP 2976486 A1 20160127; EP 2976486 A4 20161109; EP 2976486 B1 20180822; NO 20140315 A1 20140923; NO 342521 B1 20180604
DOCDB simple family (application)
NO 2014050040 W 20140318; EP 14772571 A 20140318; NO 20140315 A 20140312