EP 2707570 A4 20151230 - PRESSURE AND FLOW CONTROL IN DRILLING OPERATIONS
Title (en)
PRESSURE AND FLOW CONTROL IN DRILLING OPERATIONS
Title (de)
DRUCK-UND STRÖMUNGSSTEUERUNG BEI BOHROPERATIONEN
Title (fr)
COMMANDE DE PRESSION ET D'ÉCOULEMENT DANS DES OPÉRATIONS DE FORAGE
Publication
Application
Priority
US 2011035751 W 20110509
Abstract (en)
[origin: WO2012154167A1] A well drilling system includes a flow control device regulating flow from a rig pump to a drill string, the flow control device being interconnected between the pump and a standpipe manifold, and another flow control device regulating flow through a line in communication with an annulus. Flow is simultaneously permitted through the flow control devices. A method of maintaining a desired bottom hole pressure includes dividing drilling fluid flow between a line in communication with a drill string interior and a line in communication with an annulus; the flow dividing step including permitting flow through a flow control device interconnected between a pump and a standpipe manifold.
IPC 8 full level
E21B 43/12 (2006.01); E21B 21/08 (2006.01); E21B 34/06 (2006.01)
CPC (source: EP US)
E21B 21/08 (2013.01 - EP US); E21B 2200/22 (2020.05 - EP)
Citation (search report)
- [X] WO 2011043764 A1 20110414 - HALLIBURTON ENERGY SERV INC [US], et al
- See references of WO 2012154167A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2012154167 A1 20121115; AU 2011367855 A1 20131024; CA 2832720 A1 20121115; CA 2832720 C 20170328; EP 2707570 A1 20140319; EP 2707570 A4 20151230; MX 2013013045 A 20140217; MX 340331 B 20160705; MX 350433 B 20170906
DOCDB simple family (application)
US 2011035751 W 20110509; AU 2011367855 A 20110509; CA 2832720 A 20110509; EP 11865031 A 20110509; MX 2013013045 A 20110509; MX 2016008649 A 20110509