EP 0378040 A1 19900718 - Casing hanger running and retrieval tools.
Title (en)
Casing hanger running and retrieval tools.
Title (de)
Ein- und Ausbauwerkzeuge für Futterrohraufhänger.
Title (fr)
Outils pour poser et récupérer une suspension de tubage.
Publication
Application
Priority
- US 28521888 A 19881216
- US 28579188 A 19881216
- US 28660388 A 19881216
Abstract (en)
A tool for setting or retrieving a packoff between the casing hanger and the wellhead utilizes differential area pistons. The tool has a mandrel (27) which connects to a string of drill pipe. The mandrel carries a body (55) and is axially movable relative to the body. A sleeve (75) is carried by the body for connection to the packoff (81). A sleeve piston (89) is carried by the body for relative movement relative to the body. A mandrel piston (97) is carried by the mandrel for movement with the mandrel. Passages (93) in the body communicate the mandrel piston (97) with the sleeve piston (89) and contain an incompressible fluid. Axial movement of the mandrel causes the pressure to increase to drive the sleeve piston downward to set the packoff, or in another embodiment, upward to retrieve the packoff.
IPC 1-7
IPC 8 full level
E21B 33/043 (2006.01); E21B 33/00 (2006.01)
CPC (source: EP)
E21B 33/043 (2013.01); E21B 2200/01 (2020.05)
Citation (search report)
- [A] EP 0289108 A2 19881102 - CAMERON IRON WORKS INC [US]
- [A] US 3693714 A 19720926 - BAUGH BENTON F
- [A] US 3520360 A 19700714 - KISLING JAMES W
- [A] US 3360049 A 19671226 - KISLING III JAMES W
- [A] GB 2160241 A 19851218 - GRASER JAMES ARTHUR
Designated contracting state (EPC)
FR GB IT
DOCDB simple family (publication)
EP 0378040 A1 19900718; EP 0378040 B1 19940323; BR 8906544 A 19900821; CA 2003348 A1 19900616; CA 2003348 C 19950516; NO 301609 B1 19971117; NO 894978 D0 19891212; NO 894978 L 19900618
DOCDB simple family (application)
EP 89630226 A 19891214; BR 8906544 A 19891218; CA 2003348 A 19891120; NO 894978 A 19891212