METHOD OF PERIODIC RUNNING OF WELLS WITH TWO END PRESSURE CONTROLLERS Russian patent published in 2000 - IPC

FIELD: oil and gas industry. SUBSTANCE: method is realized by means of special arrangement of tubing string which includes plunger, lower and upper shock absorbers, end pressure controllers. Face and well-head pressure controllers are so tuned that face pressure controller operates and opens first when face pressure achieves calculated value providing for arrival of pool fluid into space of tubing string. With rise of buffer pressure to calculated value well-head pressure controller operates and opens ensuring coming of pool fluid into oil collector. Both of them are open providing for ingress of pool fluid into oil collector. They are open simultaneously till face pressure value falls to calculated value, after it face pressure controller shuts off and well-head pressure controller shuts off when buffer pressure lowers to calculated value. EFFECT: more complete output of stock, substantially prolonged natural gushing of wells without transfer to mechanized process of production of hydrocarbons. 1 dwg