EP 3353353 A1 20180801 - METHOD AND TOOLS FOR SEALING OF ANNULUS BETWEEN BOREHOLE AND WELL CASING
Title (en)
METHOD AND TOOLS FOR SEALING OF ANNULUS BETWEEN BOREHOLE AND WELL CASING
Title (de)
VERFAHREN UND WERKZEUGE ZUM ABDICHTEN EINES RINGRAUMS ZWISCHEN BOHRLOCH UND BOHRLOCHVERROHRUNG
Title (fr)
PROCÉDÉ ET OUTILS POUR SCELLER L'ESPACE ANNULAIRE ENTRE UN TROU DE FORAGE ET UN TUBAGE DE PUITS
Publication
Application
Priority
- DK PA201500557 A 20150923
- DK 2016000049 W 20160922
Abstract (en)
[origin: WO2017211361A1] The claimed invention concerns a method and tools for sealing insufficiently sealed annulus between well casing and borehole in water wells by injection of Bentonite slurry through valves inserted in the well casing wall into the borehole annulus. Creating a penetration in the well casing wall carries a risk that an obstacle outside the well casing prevents valves to be inserted. By melting the valve inserts through the well casing wall and fitting them with a recess to retain the melt-out section of well casing wall, it can be ensured they can be removed and replaced by a plug by the described tools. In fig. 3b; 301b: Wings to transmit rotational force; 302b: Ball track groove to transmit axial force; 303b: Threading; 304b: Valve seat; 305b: Ball; 306b: Spring; 307b: Plate; 308b: Seeger ring; 309b: Exit hole; 310b: Melt-out retaining cavity; 311b: Blunt edge; 312b: Melt-out retaining recess; 313b: Valve insert housing.
IPC 8 full level
E03B 3/15 (2006.01); E21B 33/13 (2006.01)
CPC (source: DK EP)
E03B 3/12 (2013.01 - EP); E03B 3/15 (2013.01 - DK); E03B 3/16 (2013.01 - EP); E21B 33/138 (2013.01 - EP); E21B 43/112 (2013.01 - EP); Y02A 20/00 (2017.12 - EP)
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)
WO 2017211361 A1 20171214; DK 179587 B1 20190220; DK 201500557 A1 20170418; EP 3353353 A1 20180801; EP 3353353 A4 20190821
DOCDB simple family (application)
DK 2016000049 W 20160922; DK PA201500557 A 20150923; EP 16904523 A 20160922