Global Patent Index - EP 0478094 A3

EP 0478094 A3 19920520 - METHOD AND SYSTEM FOR ATTACHING AND REMOVING EQUIPMENT FROM A WELLHEAD

Title (en)

METHOD AND SYSTEM FOR ATTACHING AND REMOVING EQUIPMENT FROM A WELLHEAD

Publication

EP 0478094 A3 19920520 (EN)

Application

EP 91203095 A 19870615

Priority

  • EP 91203095 A 19870615
  • US 89139186 A 19860731

Abstract (en)

[origin: EP0478094A2] 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

E21B 33/035

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)

Citation (search report)

Designated contracting state (EPC)

FR GB

DOCDB simple family (publication)

EP 0478094 A2 19920401; EP 0478094 A3 19920520

DOCDB simple family (application)

EP 91203095 A 19870615