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Circulating pump
Thepumpisaimprovedtypeofthehydraulicfeed-backpumpforheavycrudeoil.Notonlytheformeradvantageshavebeenremainedbuttheinflowvalvehasbeenchangedtobeaannularvalveinthiskindofpump，whichobtainsalargeflowareaandshortenstheinflowtubing，sotheinflowresistanceisdecreased.Inthemeantime，forusingalongplungerandashortbarrelinlowerpump，thephenomenonofsand-upcanbeefficientlyavoided.Thepumpissuitablefor7”casingwell，thepumpφ57/φ38maybeusedin51/2”casingwell. Pumpbore（mm）Lengthofplunger（m）Lengthofbarrel（m） RangeofStroke（m） SizeofconnectingTubing（in） Sizeofconnectingsuckerrod PumpconstantMaxoutsidediameter（mm）UpperPlunger（m）LowerPlunger（m）Upperbarrel（m）Lowerbarrel（m）57/38 21/2TBGCYG191.91 70/38 3TBGCYG193.91 70/440.6～1.22.4～7.23.0～7.80.6～1.21.8～6.03TBGCYG223.3514283/44 31/2TBGCYG255.60 83/57 31/2TBGCYG254.25
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Oil pump class
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Circulating pump
Details
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） |
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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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