EP 0904481 A1 19990331 - CORE MACHINE
Title (en)
CORE MACHINE
Title (de)
KERNBOHRAPPARAT
Title (fr)
CAROTTIER
Publication
Application
Priority
- BE 9600504 A 19960605
- EP 9702964 W 19970603
Abstract (en)
[origin: WO9746790A1] Core machine intended particularly to the oil prospection field, comprising a core crown (2), an external tube (3) for the rotational driving of the core crown (2), and an internal tube (4) having a free front end element (7) intended to receive a core (5), and a revolution surface (8) of the free end element (7), on the crown side (2), arranged to cooperate with an internal surface (9) thereof, or optionally of the external tube (3), so as to adjust between the two a predetermined passage for the core drilling fluid, the free end element (7) being mounted in the core drilling machine (1) so as to slide coaxially on an extremity section (13) of the internal tube (4), between a position wherein the revolution surface (8) is in contact with the internal surface (9) of the crown (2), or respectively of the external tube (3), and an extreme position away from said internal surface (9).
IPC 1-7
IPC 8 full level
E21B 21/10 (2006.01); E21B 25/00 (2006.01)
CPC (source: EP US)
E21B 21/10 (2013.01 - EP US); E21B 25/00 (2013.01 - EP US)
Citation (search report)
See references of WO 9746790A1
Designated contracting state (EPC)
BE DE FR GB IT NL
DOCDB simple family (publication)
WO 9746790 A1 19971211; BE 1010325 A3 19980602; CA 2257377 A1 19971211; CA 2257377 C 20021119; DE 69709638 D1 20020221; DE 69709638 T2 20021002; EP 0904481 A1 19990331; EP 0904481 B1 20020116; NO 315530 B1 20030915; NO 985641 D0 19981203; NO 985641 L 19981203; US 6145604 A 20001114
DOCDB simple family (application)
EP 9702964 W 19970603; BE 9600504 A 19960605; CA 2257377 A 19970603; DE 69709638 T 19970603; EP 97925061 A 19970603; NO 985641 A 19981203; US 19490298 A 19981204