METHOD OF AND DEVICE FOR TRANSFER OF GAS AND GAS-LIQUID MIXTURES BY PISTON PUMP Russian patent published in 1999 - IPC

FIELD: oil industry; drilling, completion of well and oil production. SUBSTANCE: liquid is continuously delivered into working chamber filled by gas or gas-liquid mixture during suction stroke and gas compression stroke under pressure changing during the indicated stroke from initial pressure of gas or gas-liquid mixture delivered into working chamber to pressure at pump outlet along constantly open hydraulic channel from zone at delivery valve outlet of working chamber through which liquid is transferred. For delivery of gas or gas-liquid mixture into working chamber ejection effect at interaction with liquid in hydraulic channel is used, liquid flow rate being regulated in hydraulic channel. Piston pump is furnished additionally with hydraulic channel through which working chamber filled with gas-liquid mixture or gas is placed in communication with working chamber filled with liquid. Throttle with regulated hydraulic resistance is installed in hydraulic channel. EFFECT: simplified design of pump, no necessity of additional equipment for building liquid head at pump inlet. 5 cl, 1 dwg