CRYOGAS GENERATION PROCESS PROVIDING WELLS WITH HIGH- PRESSURE GAS Russian patent published in 2001 - IPC

FIELD: oil industry. SUBSTANCE: proposal refers to oil recovery and can be used for provision of nitrogen-employing technologies with high- pressure gas while conducting drilling operations, start-ups, repair and reconstruction of wells. Powder elements of sodium azide are burnt up in gas generator, produced gas is fed into well and pool is subjected to baric action. Gas is supplied into well and for action on pool from system providing well with gas that is placed above shaft of well. This system presents two main lines intercoupled hydraulically. One of main lines having source of hot high-pressure gas is made of gas generator, gas cleaning filter and heat exchanger-mixer, the other main line has source of liquefied gas, for instance, cryogenic tank. Required safe temperature of gas fed into well is obtained thanks to interaction and mixing of gases from two main lines. EFFECT: provision for safe and convenient operation of systems supplying wells with high-pressure gas. 1 cl, 1 dwg