EP 0525991 A1 19930203 - Sidewall coring tool.
Title (en)
Sidewall coring tool.
Title (de)
Seitenwand-Kernwerkzeug.
Title (fr)
Outil de ségrégation mineure pour paroi latérale.
Publication
Application
Priority
- GB 9116400 A 19910730
- GB 9117956 A 19910820
Abstract (en)
A tool (1) for obtaining rock samples during drilling, comprising a hole opener assembly or underreamer (2) for attachment to a drill string with a coring assembly (3) mounted in a recess in the body of the tool (1). The coring assembly (3) is mounted on the tool body (1) so that it can pivot (5) and be deployed at a shallow angle to the longitudinal axis of the tool body (1). The hole opener assembly or underreamer (2) forms a ledge around the tool body (1) and the coring assembly (3) performs a coring operation on the ledge. Alternatively, the coring assembly (13) performs a coring operation in the pocket formed by an underreamer (12) where the coring assembly (13) is mounted within a cutting arm (12a) of the underreamer (12). <IMAGE>
IPC 1-7
IPC 8 full level
E21B 7/06 (2006.01); E21B 10/26 (2006.01); E21B 10/32 (2006.01); E21B 49/06 (2006.01)
CPC (source: EP US)
E21B 7/061 (2013.01 - EP); E21B 10/322 (2013.01 - EP US); E21B 49/06 (2013.01 - EP)
Citation (search report)
- [A] US 2511508 A 19500613 - JOHN MCCLINTON
- [A] US 3150727 A 19640929 - GARRISON MARION A
- [A] US 3598191 A 19710810 - BULLARD LUTHER
- [A] US 4461360 A 19840724 - MOUNT II HOUSTON B [US]
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU MC NL PT SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 92306047 A 19920630