EP 0478094 A2 19920401 - Method and system for attaching and removing equipment from a wellhead.
Title (en)
Method and system for attaching and removing equipment from a wellhead.
Title (de)
Verfahren und Vorrichtung zur Befestigung und Entfernung von Zusatzeinrichtungen an, beziehungsweise von einem Bohrlochkopf.
Title (fr)
Procédé et système permettant d'effectuer le montage et le démontage d'équipments dans une tête de puits.
Publication
Application
Priority
- EP 91203095 A 19870615
- US 89139186 A 19860731
Abstract (en)
A system and method for attaching and removing equipment (25) from a subsea wellhead (26) in which equipment is lowered and raised on a flexible riser pipe (22), cables (34) extend from the equipment (25) to the wellhead (26) and are winched in and out to control movement of the equipment (25) adjacent the wellhead (26). While the cables (34) are being winched in or out, the cables (34) are maintained in tension by the reel (33) and a motion compensator (36) between the equipment (25) and riser pipe (22) which can reciprocate vertically with the vessel (20) in response to wave action, while the equipment (25) is insulated from this action during engagement and disengagement with the wellhead (26). The cable winch system may be used to reconnect the riser pipe lower connector (29, 31) to the remainder of the equipment (28) after disconnection. <IMAGE>
IPC 1-7
IPC 8 full level
E21B 33/035 (2006.01); E21B 41/10 (2006.01)
CPC (source: EP US)
E21B 33/035 (2013.01 - EP US); E21B 41/10 (2013.01 - EP)
Designated contracting state (EPC)
FR GB
DOCDB simple family (publication)
DOCDB simple family (application)
EP 91203095 A 19870615