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Circulating pump
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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