METHOD OF DEEP GAS WELL EQUIPMENT WITH TUBING STRING COMPOSITION Russian patent published in 2017 - IPC E21B43/00 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to methods of equipping wells drilled in widespread range zones of perennially frozen rocks (PFR), in the presence of abnormally high formation pressures (AHFP) with underground operational equipment. Series connection of the required elements of the underground operational equipment of bottom tubing string composition is carried out, containing a bottom-up centering flowing well, below-packer shank from the tubing string, the lower landing nipple, the production packer, on/off tool. Landing of the mentioned composition on the process column to the well until the specified depth, packing of the production packer are carried out. Then, a blind plug is lowered to the well overlapping the seat of the bottom landing nipple, elements of the bottom part of the tubing string are moulded by generating excessive pressure not exceeding the expected operating pressure at the wellhead, the blind plug is extracted from the well, the process column is disconnected at the on/off tool and extracted from the well. Then, elements of the underground operating equipment of upper tubing string composition are consequently connected and lowered into the well, containing following from the bottom upwards: a detached part of the on/off tool, a circulating valve, an upper landing nipple, a telescopic connection, pressure and temperature sensor holder, the middle section of tubing string from the pumping and compression pipes, an inhibitory valve, a wellhead safety valve, an upper section of the tubing string from the pumping and compression pipes. The upper part of the tubing string is connected to its bottom in the on/off tool, elements of the upper part of the tubing string are moulded by generating excessive pressure not exceeding the expected operating pressure at the wellhead, the tubing string is hanged in the suspension of the pumping and compression pipes of the flowing wellhead equipment tubing head.

EFFECT: improving reliability and efficiency of the well operation.

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