EP 1048819 A1 20001102 - Closed loop fluid-handling system for use during drilling of wellbores
Title (en)
Closed loop fluid-handling system for use during drilling of wellbores
Title (de)
System zur Spülungsaufbereitung im geschlossenen Kreislauf zum Einsatz in Brunnenbohrungen
Title (fr)
Système de manutention de fluides en boucle fermée utilisé au cours du forage de puits
Publication
Application
Priority
- EP 97922650 A 19970505
- US 64282896 A 19960503
- US 3075296 P 19961029
Abstract (en)
This invention provides a fluid-handling system for use in underbalanced drilling operations. The system includes a first vessel which acts as a four phase separator. The first vessel includes a first stage for separating solids. Oil and gas are separated at a second stage. A pressure sensor provides signals to a pressure controller, which modulates a gas flow valve coupled to the vessel for discharging gas from the first vessel. The pressure controller maintains the pressure in the first vessel at a predetermined value. An oil level sensor placed in the first vessel provides a signal to an oil level controller. The oil level controller modulates an oil flow valve coupled to the vessel to discharge oil from the first vessel into a second vessel. Water is discharged into a third vessel. Water from the third vessel is discharged via a water flow control valve, which is modulated by a level controller as a function of the water level in the third vessel. Any gas in the third vessel is discharged by modulating a gas control valve as a function of the pressure in the third vessel. <IMAGE>
IPC 1-7
IPC 8 full level
E21B 21/06 (2006.01); E21B 21/08 (2006.01); E21B 21/14 (2006.01); E21B 44/00 (2006.01); E21B 21/00 (2006.01)
CPC (source: EP US)
E21B 21/06 (2013.01 - EP); E21B 21/08 (2013.01 - EP US); E21B 21/085 (2020.05 - EP); E21B 21/14 (2013.01 - EP); E21B 44/00 (2013.01 - EP)
Citation (applicant)
US 5249635 A 19931005 - KING CHARLES W [US], et al
Citation (search report)
- [XY] US 5411105 A 19950502 - GRAY BENJAMIN [CA]
- [DYA] US 5249635 A 19931005 - KING CHARLES W [US], et al
- [X] US 4924949 A 19900515 - CURLETT HARRY B [US]
- [A] US 4449594 A 19840522 - SPARKS RONALD L [US]
Designated contracting state (EPC)
GB
DOCDB simple family (publication)
DOCDB simple family (application)
EP 00112899 A 19970505