API 11AX sucker rod pump for oil well pumping

Rod pump is also known as insert rod pump, it is one type of the conventional sucker rod pumps. The rod pump is connected to thesucker rod directly, it can be pulled out with sucker rod and does not influence the tubing, so the well inspection and workover ismore convenient. It can save a half times and reduce cost of the pumping test, thus the rod pump is suitable for the deeper well.

Our rod pump is strictly conforming to API SPEC 11AX (or GB18607) standard.

Depending on the wall thickness of the barrel, the Rod pump can be classified as either a thin wall rod pump or a thick wall rod pump.

Specification:

Based on the conventional subsurface pumps, a series of special purpose pumps were developed, which can apply to different well conditions.

1. Long Plunger Pump

Long plunger pump has a short barrel, a long plunger and two standing valves, which increase the reliability of the seal. Ball and seat use special material which has higher hardness to increase the whole pump’s anti-corrosion and impact resistance capacity. Long plunger pump is long in life and high in efficiency and applies to wells of sand content less than 0.1%.

2. Long Plunger and Anti-Sand Sticking Pump

Long plunger and antisand sticking pump is improved based on the long plunger tubing pump by adding a sand setting tube and a joint, thus preventing the pump from being stuck by sand.

Long plunger and anti-sand sticking pump can be used in the wells of sand content about 0.8%, and consists of a barrel assembly, a plunger assembly and a sand control assembly.

The pump has long plunger and short barrel so that the plunger seals the barrel all the time.
Because of the special heat treatment towards the inside surface of the barrel, it is much better than the standard barrel in anti-wear and anticorrosion capacity.
3. Suspension Pump
The barrel of suspension pump is suspended, so the load on the barrel is small and the deformation of the barrel is small so as to avoid sticking pump because of the elongation and the attenuation of the barrel. Compared with common pumps, suspension pump is longer in life. It is mainly composed of barrel assembly, plunger assembly and outer tube assembly.
4. Series Connection Pump
There are two different barrels and plungers in series connection pump. According to the theory of hydraulic feedback, during the down stroke, a downward force is formed to overcome the friction between the viscous crude and the sucker rod, thus improving the load condition on the sucker rod and decreasing and eliminating the disconnection and break of
the sucker rod. The pump applies to the wells of oil viscosity less than 4,000mPa*s(50℃),the wells with thin oil and the viscous oil wells without thermal recovery conditions.

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