Double-plunger valve downhole pump

Since 1986, the (General Machinery Plant) Sanjack Petro’s former has obtained the qualification for manufacturing Class I and II pressure vessels.

Now the SANJACK ‘s special equipment has the national A2 level (Ⅰ, Ⅱ, Ⅲ) pressure vessel manufacturing qualification; D-level pressure vessel design qualification; A-level boiler manufacturing, installation, alteration, repair & maintenance qualification; American Society of Mechanical Engineers ( ASME) U and S stamp qualifications.

Double-plunger valve downhole pump Characteristic

1)The traveling valve adopts a mechanical valve structure which will open/close with sucker rod going up and down.

2)The sealing function is separated from the stress of plunger, greatly prolonging the service life of the pump.

3)The plunger is of floating structure with self-repair function, which can prolong the service life of valves .

 

 

Double-plunger valve downhole pump Application

1)Can achieve cold production at 50 ℃ and crude oil viscosity within 4000mpa.s.

2)Suitable for wells with gas-oil ratio lower than 800;

3)Can be used in wells that with a slant degree less than 40°.

 

 

TypeSizeParameters
Basic Dia., in
(mm)
Plunger Length,ft
(mm)
Barrel Length,ft
(mm)
Tubing SizeRod SizePump Constant
Double-plunger valve pump25-1751.75(44.45)Standard Lengths are: 2ft (0.61m) to 24ft(7.32m) in 1ft(0.306m) increments.Standard Lengths are: 4ft (1.219m) t034ft(10.363m) in 1ft(0.305m)2 7/8 NU/EU3/4in2.235
25-2252.25(57.15)2 7/8 NU/EU3/4in3.694
30-2752.75(69.85)3 1/2 NU/EU7/8in5.518
40-3253.25(82.55)4 1/2 NU/EU7/8in7.707
40-3753.75(95.25)4 1/2 EU1in10.261

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