EP 2670944 A2 20131211 - DOWNHOLE PRESSURE RELIEF APPARATUS
Title (en)
DOWNHOLE PRESSURE RELIEF APPARATUS
Title (de)
VORRICHTUNG FÜR BOHRLOCHDRUCKENTLASTUNG
Title (fr)
APPAREIL DE PROTECTION CONTRE LA SURPRESSION DE FOND DE TROU
Publication
Application
Priority
- GB 201101566 A 20110131
- GB 2012000026 W 20120113
Abstract (en)
[origin: WO2012104574A2] A downhole pressure relief apparatus (10) comprises a tubular member (18) configured to be located within a wellbore (12) to at least partially define a wellbore annulus (26), wherein the annulus (26) is subject to varying fluid pressure, and a chamber (36) associated with the tubular member (18). A valve arrangement (38) associated with the chamber (36) is provided and is configurable from a closed state to an open state in response to a pressure event, wherein, in use, in the closed state the chamber (36) is isolated from the wellbore annulus (26), and in the open state fluid (28) is permitted to flow into the chamber (36) from the wellbore annulus (26) to relieve pressure within said annulus.
IPC 8 full level
E21B 34/06 (2006.01); E21B 41/00 (2006.01); E21B 47/06 (2012.01)
CPC (source: EP)
E21B 34/06 (2013.01); E21B 41/0021 (2013.01); E21B 47/06 (2013.01)
Citation (search report)
See references of WO 2012104574A2
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 2012104574 A2 20120809; WO 2012104574 A3 20130103; EP 2670944 A2 20131211; GB 201101566 D0 20110316
DOCDB simple family (application)
GB 2012000026 W 20120113; EP 12700581 A 20120113; GB 201101566 A 20110131