EP 3635215 A1 20200415 - IMPROVEMENTS IN OR RELATING TO WELL ABANDONMENT
Title (en)
IMPROVEMENTS IN OR RELATING TO WELL ABANDONMENT
Title (de)
VERBESSERUNGEN AN ODER IM ZUSAMMENHANG MIT DER BOHRLOCHAUFGABE
Title (fr)
PERFECTIONNEMENTS APPORTÉS OU LIÉS À L'ABANDON D'UN PUITS
Publication
Application
Priority
- GB 201709034 A 20170607
- GB 2018051534 W 20180606
Abstract (en)
[origin: GB2563236A] A method and apparatus for the combined cleaning and plugging of an annulus 42 in a well across a longitudinal section of the well were the annulus is located outside a conduit 12 in the well. The conduit is perforated over the longitudinal section 38 to form a plurality of holes 32. Washing fluid is passed through at least one of the holes at a first location on the longitudinal section to clear material in the annulus and returns through at least one of the holes at a second location on the longitudinal section before the longitudinal section is plugged. Pressure variations are created in the washing fluid by use of a flow modifier device 24 to pulse the washing fluid. Embodiments include creating pressure variations in the plugging material.
IPC 8 full level
E21B 33/13 (2006.01); E21B 37/00 (2006.01); E21B 43/114 (2006.01)
CPC (source: EP GB NO US)
E21B 33/12 (2013.01 - US); E21B 33/13 (2013.01 - EP GB NO US); E21B 33/14 (2013.01 - GB NO); E21B 37/00 (2013.01 - EP GB NO US); E21B 43/11 (2013.01 - GB); E21B 43/114 (2013.01 - EP NO); E21B 43/116 (2013.01 - US)
Citation (search report)
See references of WO 2018224819A1
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
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
GB 201709034 D0 20170719; GB 2563236 A 20181212; GB 2563236 B 20200401; EP 3635215 A1 20200415; NO 20191344 A1 20191113; US 2020173249 A1 20200604; WO 2018224819 A1 20181213
DOCDB simple family (application)
GB 201709034 A 20170607; EP 18749044 A 20180606; GB 2018051534 W 20180606; NO 20191344 A 20191113; US 201816614925 A 20180606