FIELD: oil and gas production.
SUBSTANCE: invention refers to oil and gas industry, particularly to lowering and cementing cased column in well. The procedure consists in lowering cased column equipped with centralisers, in arranging centralisers opposite to reservoirs with caverns, and in producing dynamic effect to caverns with rising stream of flush fluid at well flushing and with cement grout at cementing the cased column; also dynamic effect is generated with centrifugal forces to rising stream of flush fluid and cement grout by means of centralisers; each centraliser contains a case with spiral shaped ribs integrated with the case. Fluid containing reagents with properties for flushing structured drilling agent and thickened adhesion film on walls of caverns is chosen as flush fluid.
EFFECT: upgraded quality of well casing due to most efficient process of removing structured drilling agent and thickened on walls of caverns adhesion film from caverns.
2 cl, 2 dwg
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