EP 0846837 B1 20031112 - Subterranean well bore casing milling apparatus
Title (en)
Subterranean well bore casing milling apparatus
Title (de)
Unterirdische Vorrichtung zum Fräsen einer Bohrlochverrohrung
Title (fr)
Dispositif souterrain pour le fraisage d'un tubage de puits
Publication
Application
Priority
- US 75950896 A 19961205
- US 77914697 A 19970103
Abstract (en)
[origin: EP0846837A2] Subterranean well bore casing milling apparatus comprising: a tubular anchor assembly (22) having a top end portion and being coaxially and releasably securable in the casing, said tubular anchor assembly including a tubular inner mandrel having an outer side surface, a tubular slip carrier coaxially circumscribing the inner mandrel in a radially outwardly spaced relationship therewith, the slip carrier having a circumferentially spaced series of side wall slip windows therein and outwardly bounding an annular space between the inner mandrel and the slip carrier, a circumferentially spaced series of slips (40, 42) disposed in the annular space, with radially outer portions ofthe slips being received in the slip windows for movement therethrough between radially retracted and radially extended positions, a biasing structure operative to resiliently bias the slips to their radially retracted positions, and a setting structure operative to force the slips from their radially retracted positions to their radially extended positions; a mill guide member (24) having a lower end portion connected to the top end portion of the tubular anchor assembly, and a tubular upper end portion (24a); and a tubular retrieval member coaxially securable to a milling pipe (30) and being coaxially latchable in the tubular member coaxially secured to the upper mill guide member end portion. <IMAGE> <IMAGE> <IMAGE>
IPC 1-7
E21B 23/01; E21B 23/04; E21B 23/02; E21B 7/06; E21B 29/06; E21B 23/06; E21B 33/1295
IPC 8 full level
E21B 7/06 (2006.01); E21B 23/01 (2006.01); E21B 23/02 (2006.01); E21B 23/04 (2006.01); E21B 23/06 (2006.01); E21B 29/06 (2006.01)
CPC (source: EP US)
E21B 7/061 (2013.01 - EP); E21B 23/01 (2013.01 - EP); E21B 23/02 (2013.01 - EP); E21B 23/0411 (2020.05 - EP US); E21B 23/06 (2013.01 - EP); E21B 29/06 (2013.01 - EP)
Designated contracting state (EPC)
DE DK FR GB IT NL
DOCDB simple family (publication)
EP 0846837 A2 19980610; EP 0846837 A3 20011017; EP 0846837 B1 20031112; AU 4689197 A 19980611; BR 9707749 A 19990601; CA 2223517 A1 19980605; CA 2223517 C 20040224; DE 69726098 D1 20031218; DE 69726098 T2 20040826; DK 0846837 T3 20040322; NO 314153 B1 20030203; NO 975626 D0 19971204; NO 975626 L 19980608
DOCDB simple family (application)
EP 97309894 A 19971205; AU 4689197 A 19971204; BR 9707749 A 19971205; CA 2223517 A 19971204; DE 69726098 T 19971205; DK 97309894 T 19971205; NO 975626 A 19971204