| 摘要 |
FIELD: oil and gas industry. ^ SUBSTANCE: invention refers to oil and gas industry, particularly to pump installations of well. The installation consists of production string, of a column of hollow rods, of a packer and a differential pump with upper and lower hollow plungers. The suction valve of the upper section of the differential pump is installed at side, while the pressurising one - in a bypass channel of the upper section conjugated with the cavity of the production string. The bypass channel is made in the upper plunger. The upper plunger is assembled on the hollow rod so, that fluid can overflow; the upper plunger is designed to perform limited axial travels. From below the bypass channel is equipped with a seat of the pressurising valve, while the hollow rod is equipped with its locking body arranged on the exterior surface of the hollow rod and with a pusher interacting with plunger from above. ^ EFFECT: simplification of installation design, increasing of its efficiency, particularly at high viscosity of reservoirs, facilitation of installation regulating for reservoir yields. ^ 2 dwg
|
