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The are several slots around the middle of the barrel.When the plunger is in the uppermost position，the slots possess the function of oil entering and gas escaping.This can increase the filling coefficient and prevent “gas-lock“.It is not necessary to install the oil drainers in down-hole and the vapour-injection operation can be done without lifting the tubing strings.So the pump is suitable for the heavy crude oil wells and gaseous wells.
Pump bore （mm） | Length of plunger （m） | Length of barrel （m） | Range of Stroke （m） | Size of connecting Tubing （in） | Pump constant | Size of connecting sucker rod |
44 | 2.235 | CYG19 | ||||
57 | 1.2+1.2 | 5.4～8.4 | 1.5～3.0 | 2 7/8 TBG | 3.694 | CYG19 |
70 | 5.515 | CYG22 |
0531-69959201
lqg18653457231
+86-18653457231
No 12111,Jingshi Road, Lixia District, Jinan City, Shandong Province. P.R. China
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