EP 3402960 B1 20200520 - WELL PLUG AND ABANDONMENT CHOKE INSERT
Title (en)
WELL PLUG AND ABANDONMENT CHOKE INSERT
Title (de)
BOHRLOCHSTOPFEN UND DROSSELEINSATZ FÜR AUSSERBETRIEBSETZUNG
Title (fr)
BOUCHON DE PUITS ET PIÈCE RAPPORTÉE D'ÉTRANGLEMENT POUR L'ABANDON
Publication
Application
Priority
- US 201614992217 A 20160111
- US 2017012922 W 20170111
Abstract (en)
[origin: WO2017123579A1] A process for plugging a wellbore, e.g. an oil or gas well, comprises installing a choke device into the wellbore in order to increase the back pressure to allow better control when introducing cement to plug the wellbore. The device has a cylindrical shape with a central through bore. On the external profile is a shoulder which, when the device is installed in a wellbore, comes to rest against a nipple in the wellbore. The device may free fall for all or part of the way down but would normally be pumped down at least for the last part of its delivery. In the bore is a pump out ball which blocks the through bore until the device reaches the nipple and stops, at which point pressure increases and the ball is ejected. Cement and other liquid may then be pumped through the choke device to the distal region of the well.
IPC 8 full level
E21B 33/13 (2006.01); E21B 21/10 (2006.01); E21B 23/08 (2006.01)
CPC (source: EP)
E21B 21/10 (2013.01); E21B 23/08 (2013.01); E21B 33/13 (2013.01)
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 2017123579 A1 20170720; AU 2017207293 A1 20180802; AU 2017207293 B2 20211028; EP 3402960 A1 20181121; EP 3402960 A4 20191009; EP 3402960 B1 20200520
DOCDB simple family (application)
US 2017012922 W 20170111; AU 2017207293 A 20170111; EP 17738827 A 20170111