WELL CONSTRUCTION METHOD Russian patent published in 2020 - IPC E21B33/14 E21B43/10 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas industry, particularly, to cementing of casing strings using nonmetallic pipes. Proposed method comprises drilling of well at design depth, lowering and installation of nonmetallic casing pipes with inserts out of steel pipes located opposite openings of productive formations. Preliminary analysis of adhesion of cement stone to external surface of non-metal pipes, allowable amplitude and frequency of wave action, not appealing exfoliation of cement stone and / or destruction of material of these pipes. In testing wells wave propagation and attenuation is checked during cumulative secondary formation penetration and / or during hydraulic fracturing of this formation with determination of interval, after which wave action has permissible frequency and amplitude for material of non-metallic pipe and / or integrity of cement stone. When lowering the casing, insertions from steel pipes are used with length not less than a certain interval for covering productive strata. Thereafter, the casing string is cemented to the well mouth. After process maintenance for hardening of cement mortar to produce behind-the-casing cement stone is performed secondary exposure of formation. If it is necessary to stimulate formation, it is subjected to hydraulic fracturing.

EFFECT: raised efficiency of cementing of non-metal pipes due to exclusion of destruction of behind-the-casing stone and nonmetallic pipes at perforation of well and / or hydraulic fracturing of formation.

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