EP 0397872 B1 19940216 - WELL EXPANDER.
Title (en)
WELL EXPANDER.
Title (de)
NACHRÄUMER ZUR BOHRLOCHERWEITERUNG.
Title (fr)
ELARGISSEUR DE PUITS.
Publication
Application
Priority
- CA 610485 A 19890906
- CN 89107058 A 19890909
- SU 8800236 W 19881122
Abstract (en)
[origin: WO9005829A1] A well expander comprises an adapter (18) for its connection to a drive, a hollow casing (1) with a central channel (2) and with radial openings (3) in its lateral wall, sliding cutters (6) provided with clamping blocks (4) and secured in the radial openings (3) of the casing (1), and a mechanism for sliding out the cutters (6), consisting of a piston (15) and a holder (17) of the cutters (6). The piston (15) is connected to the casing (1) in a manner providing for the possibility of their common rotation and is rigidly connected with the adapter (16). The wall of the piston (15) is provided with radial channels (20) connecting its central channel (16) with an annular cavity (21) formed by the walls of the piston (15) and of the casing (1). The holders (17) of the cutters (6) is mounted with a gap in the central channels (16, 2) of the piston (15) and of the casing (1) and has an annular protrusion (24). In the central channel (16) of the piston (15) is mounted a saddle (26) capable of co-operating with the annular protrusion (24) of the holder (17).
IPC 1-7
IPC 8 full level
E21B 10/26 (2006.01); E21B 7/28 (2006.01); E21B 10/34 (2006.01)
CPC (source: EP US)
E21B 10/345 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0397872 A1 19901122; EP 0397872 A4 19911211; EP 0397872 B1 19940216; AU 3057589 A 19900612; AU 621088 B2 19920305; CA 1335198 C 19950411; CN 1016201 B 19920408; CN 1050075 A 19910320; DE 3887904 D1 19940324; JP H03503792 A 19910822; NO 176729 B 19950206; NO 176729 C 19950516; NO 903239 D0 19900719; NO 903239 L 19900719; US 5184687 A 19930209; WO 9005829 A1 19900531
DOCDB simple family (application)
EP 89902351 A 19890608; AU 3057589 A 19891122; CA 610485 A 19890906; CN 89107058 A 19890909; DE 3887904 T 19881122; JP 50222489 A 19881122; NO 903239 A 19900719; SU 8800236 W 19881122; US 54380090 A 19900723