Circulating pump
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- 产品描述
-
The pump is a improved type of the hydraulic feed-back pump for heavy crude oil.Not only the former advantages have been remained but the inflow valve has been changed to be a annular valve in this kind of pump，which obtains a large flow area and shortens the inflow tubing ，so the inflow resistance is decreased .In the meantime ，for using a long plunger and a short barrel in lower pump，the phenomenon of sand-up can be efficiently avoided .The pump is suitable for 7” casing well，the pumpφ57/φ38 may be used in 5 1/2”casing well.
Pump bore
（mm）
Length of plunger（m）
Length of barrel（m）
Range of
Stroke
（m）
Size of connecting
Tubing
（in）
Size of connecting sucker rod
Pump constant
Max outside diameter
（mm）
Upper Plunger
（m）
Lower Plunger
（m）
Upper barrel
（m）
Lower barrel
（m）
57/38
2 1/2 TBG
CYG19
1.91
70/38
3 TBG
CYG19
3.91
70/44
0.6～1.2
2.4～7.2
3.0～7.8
0.6～1.2
1.8～6.0
3 TBG
CYG22
3.35
142
83/44
3 1/2 TBG
CYG25
5.60
83/57
3 1/2 TBG
CYG25
4.25
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Circulating pump
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