EP 2358968 A1 20110824 - PRESSURE AND FLOW CONTROL IN DRILLING OPERATIONS
Title (en)
PRESSURE AND FLOW CONTROL IN DRILLING OPERATIONS
Title (de)
DRUCK- UND STRÖMUNGSREGELUNG BEI BOHROPERATIONEN
Title (fr)
COMMANDE DE LA PRESSION ET DE L'ÉCOULEMENT DANS DES OPÉRATIONS DE FORAGE
Publication
Application
Priority
US 2008087686 W 20081219
Abstract (en)
[origin: WO2010071656A1] A well drilling system for use with a drilling fluid pump includes a flow control device regulating flow from the pump to a drill string interior; 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 the drill string interior; and the flow dividing step including permitting flow through another flow control device interconnected between the pump and the annulus, while flow is permitted through the first flow control device.
IPC 8 full level
E21B 7/00 (2006.01)
CPC (source: EP GB US)
E21B 19/16 (2013.01 - EP); E21B 21/08 (2013.01 - EP GB US); E21B 21/085 (2020.05 - EP); E21B 21/10 (2013.01 - GB); E21B 21/106 (2013.01 - EP)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2010071656 A1 20100624; AU 2008365249 A1 20100624; AU 2008365249 B2 20130822; CA 2742623 A1 20100624; CA 2742623 C 20131119; EP 2358968 A1 20110824; EP 2358968 A4 20170517; GB 201108380 D0 20110629; GB 2477880 A 20110817; GB 2477880 B 20121219
DOCDB simple family (application)
US 2008087686 W 20081219; AU 2008365249 A 20081219; CA 2742623 A 20081219; EP 08879035 A 20081219; GB 201108380 A 20081219