The travelling valve of the pump is designed to be closed and opened forcibly, and the pump plunger adopts equal-diameter bare pipe with a floating structure to prevent gas lock and sand sticking.
A forced-closing-and-opening plunger pump is developed to solve the problems of gas lock and sand inflow and low pump efficiency in steam injection Wells.
针对辽河油田蒸汽吞吐油井存在气锁、出砂、后期油稠泵效降低的状况，研制了强启闭柱塞抽油泵。
3
Odorization pumps are specially designed diaphragm plunger metering pump, plunger travel of the exercise machine lock, each time to maintain a constant output.