EP 1144794 A3 20020911 - CONTROL SYSTEM FOR THE WORKOVER OF OIL WELLS
Title (en)
CONTROL SYSTEM FOR THE WORKOVER OF OIL WELLS
Title (de)
STEURERUNGSSYSTEM FÜR DIE WIEDERAUFARBEITUNG VON ERDÖLBOHRUNGEN
Title (fr)
PUITS
Publication
Application
Priority
- GB 9902088 W 19990701
- GB 9814114 A 19980701
Abstract (en)
[origin: WO0001915A2] A workover control system (10) has a hydraulic power unit (30) and an electrical signal control unit located on a vessel and a control module (36) located proximate to a subsea well (14). An electrohydraulic umbilical (32) transmits electrical and hydraulic power and signals from the vessel to the control module (36). During workover of the well, workover devices (12) are operated by hydraulic signals provided by an electrohydraulic switch in the control module. The hydraulic signals are produced in response to electrical signals from the vessel.
IPC 1-7
IPC 8 full level
E21B 33/035 (2006.01); E21B 41/00 (2006.01)
CPC (source: EP US)
E21B 33/0355 (2013.01 - EP US); E21B 41/0007 (2013.01 - EP)
Citation (search report)
See references of WO 0001915A2
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
GB 2338971 A 20000112; GB 9915409 D0 19990901; AU 4527099 A 20000124; BR 9911630 A 20020115; EP 1144794 A2 20011017; EP 1144794 A3 20020911; GB 9814114 D0 19980826; NO 20006688 D0 20001228; NO 20006688 L 20010301; WO 0001915 A2 20000113; WO 0001915 A3 20011206
DOCDB simple family (application)
GB 9915409 A 19990701; AU 4527099 A 19990701; BR 9911630 A 19990701; EP 99928157 A 19990701; GB 9814114 A 19980701; GB 9902088 W 19990701; NO 20006688 A 20001228