E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/16
E21B 33/138 (2006.01) C09K 8/50 (2006.01) C09K 8/504 (2006.01) C09K 8/512 (2006.01) C09K 8/56 (2006.01) E21B 43/02 (2006.01)
Patent
CA 1283848
ABSTRACT The invention concerns a new process for plugging and / or consolidating a permeable geological formation, notably when traversed by a borehole. The process, according to this invention, comprises the following steps : a) insertion into the formation of an overdelayed gelling compound, composed of a gelable material and a hardener, for which the setting time is considerably longer than the suitable positioning time for the composition, in such a way that this permeates the formation over a significant distance. b) insertion, after a mechanical or fluid plug, of a rapid-action gelling agent, which causes the instantaneous gelling of that part of the overdelayed gelling compound in the immediate neighbourhood of the interface between the zone to be treated and the borehole. Thus preventing displacement of the overdelayed gelling compound toward the interior of the formation. The resultant gelling being both resistant and correctly placed. The invention application is to oil, gas, water or geothermal drillings.
552584
Oberste-Padtberg Rudiger
Parcevaux Philippe
Perthuis Herve
Etudes Et Fabrication Dowell Schlumberger
Oberste-Padtberg Rudiger
Parcevaux Philippe
Perthuis Herve
Smart & Biggar
LandOfFree
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