Deep Well Oil Well Pump

  • When the pump barrel is stretched and deformed, the pump plunger will not be running smoothly, and even the barrel may trip or break;
  • The valve cage may break and fail;
  • The valve may be damaged and invalid
  • The oil well pump efficiency may be reduced to less than 30%
  • Sanjack developed a lot of special oil well pumps to solve the above problems, including a suspension pump, bridge-type pump, solid plunger pump, etc.

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Deep Well Oil Well Pump Manufacturers and Suppliers

Specially for Deep Wells

Bridge structure, the depth of pump hanging is 500- 1500m deeper than the ordinary oil well pump.

Long service life

The specially designed structure makes the pump barrel does not bear the alternating force load during up and down strokes.

Low leakage

The suspension structure makes the pump barrel internal and external pressure the same, effectively reduces the leakage.

Anti-bending & Anti-abrasion

Special bridge-type structure, the pump barrel is suspended in the outer barrel. No bending and no wear.

Bridge-type Oil Well Pump
  • Specially for deep wells
  • Low leakage.
Suspension Sucker Rod Pump
  • Anti-bending and anti-leakage.
  • Anti-abrasion.
Deep Well Oil Well Pump
  • Anti-bending and anti-leakage.
  • Anti-abrasion.
Deep Well Oil Well Pump
  • Anti-bending and anti-leakage.
  • Anti-abrasion.

Sanjack Deep Well Oil Well Pump workshop was established in 1964, which has more than 50 years of history. We have rich experience in production and strong ability in research and development on Deep Well Oil Well Pump. Our products include various series of tubing pumps, rod pumps, and special sucker rod pumps. We obtained 32 national technology patents in the downhole pump. The machining workshop for sucker rod pumps is equipped with more than 200 sets equipment, including CNC lathes, milling machines, grinding machines and etc. The electroplating workshop of the sucker rod pumps enjoys countrywide advanced chrome plating equipment for well type deep hole pump barrel, which can process pump barrels ranging from 1 1/4 in (31.75 mm) to 5 3/4 in (146.05 mm) and with a length up to 34 ft (10363 mm). The sucker rod pump assembly workshop has honing machines and complete pump pressure testing devices and other equipment. Sealing performance tests must be carried out 100% after finishing the assembly of the whole pump to fully guarantee the quality of our sucker rod pumps..

Send us your requirement, Let Sanjack support you

Deep Well Oil Well Pump: The Complete Guide for Importers and Buyers

In the gas and oil industry, many different types of pumps are used in machines and installations.

The choice of pump entirely depends on the final application, which ranges from exploration, delivery, and recirculation as well as further transport for loading and unloading of tanker trucks, tanks, and ships

Deep well pumps

When the pump barrel is stretched and deformed in the deep well oil pump, the pump plunger will not be running smoothly, and even the barrel may break or tip.

This problem can cause the valve to be damaged and invalid. The oil well pump efficiency may be reduced to less than 30%

Features of a deep well oil pump

1.This pump is Specially for Deep Wells. The depth of the pump hanging should be 500-1500m deeper than the ordinary oil well pump.
2.This pump has a long service life. The specially designed structure makes the pump barrel do not bear the alternating force load during up and down strokes.
3.Low leakage. The suspension structure makes the pump barrel internal and external pressure the same. This effectively reduces leakage.
4.Anti-bending & Anti-abrasion. With a Special bridge-type structure, the pump barrel is suspended in the outer barrel, which means no bending and no wear.

How long should a deep well pump last?

  • Deep well pumps are installed deep inside your well and can push the oil out of the well from hundreds of feet. When these well pumps are well taken care of, it can have a long life of up to 15years; however, it can be challenging to know how old your well pump is if an owner had it installed.
    Suspension sucker rod pump
  • Suspension sucker rod pump

The suspension sucker rod pump adopts the barrel suspension method to prevent the pump’s deformation in a deep well that is suitable for deep wells production.

This type of pump is suitable for wells that use conventional tubing and can significantly increase the pump hanging depth and the hanging tailpipe length.

Characteristics of suspension sucker rod pump.


Since the pump barrel will not bend, the gap between the plunger and the pump barrel is uniform, which reduces the abrasion between the plunger and barrel due to the bending of the seal, which can extend the service life of the pump and improve the pump efficiency.


It can be seen from the formula of the pump’s clearance loss that the relative eccentricity of the pump is zero, which prevents leakage caused by the abnormality of the plunger and the pump barrel.

This reduces the clearance loss and improves pump efficiency.

Sucker Rod Pumping

An Improved Sucker Rod Pumping System Model.

The impact of fluid floating into the pump on the sucker rod pumping system dynamic behaviors, and improved sucker rod pumping system model with a new boundary model presented is a fluid-solid coupled model.

Pumps for difficult delivery conditions

In the sat years, fracking and oil sand processing have brought about new processes that frequently impose the head’s highest demands.

A typical solution consists of piston pumps and plunger pumps. Further processing takes place in refineries, where all types of different fuel are produced.

The basic structure of a deep well oil pump

The components of an ordinary oil well pump include the following:

  • pump barrel
  • pump plunger
  • suction valve
  • discharge valve.
    basic structure of deep well oil pump

However, for some special operating environments, the pumps are also equipped with professional devices such as fixed valves, valve balls, and many more. The source of failure of the oil well pump is roughly these components.

Thus, to ensure the normal suction and discharge of crude oil during operation, the deep well oil pump’s normal working environment must be that all parts are completely enclosed.

Second, the liquid in the pump must be full at all times.

When gas is found in the pump, the pump should be stopped immediately, and the gas should be discharged to prevent the oil pump from breaking due to the high-pressure environment during operation.

Third, ensure that the effective stroke of the pump piston is long enough. The longer the piston’s effective stroke, the greater the suction and discharge of crude oil by the pump so that more work can be done under the same conditions.

Lastly, to avoid the impact on the fixed valve, adjust the anti-shock distance.

Stellite alloy valve cage

Stellite Alloy Cage

Failure causes of the deep well oil pump

The most common faults of the deep well oil pump are:

  • The break of the traveling valve cover on the plunger
  • The break of the upper joint

The deep well oil pump’s working environment is a high pressure and high load, and the plunger’s upper joint bears huge pressure.

With the development of science and technology in recent years, some new parts with good mechanical properties have been continuously developed.

However, when some manufacturers are replacing parts, the running-in between parts has caused the oil pump to work due to internal pressure shocks.,

A gap appeared between the parts, which accelerated the fracture of the pump barrel.

Moreover, the pump’s processing level, quality control, and assembly methods greatly affect the pump’s working safety.

The deep well oil pump tripping cause analysis.

The tripping of the deep well oil well pump refers to the tripping of the traveling valve cover and the fixed valve joint.

The reason is that the oil producer sets an unreasonable anti-collision distance.

Several experiments have shown that one-third of the deep well oil well pump length is the limit distance for collision prevention.

Too small or too large a distance will cause the oil well to trip.

If the distance is too small, the traveling valve cover force will be uneven, causing the traveling valve cover to fall.

If the distance is too large, the valve stem and the upstream moving valve cover will fail to cooperate, and the deep well oil pump will fail.
downhole pump failure

The main causes of oil pump leakage

1.Poor maintenance quality of deep well pumps

Poor maintenance quality of deep well oil pumps is a major bottleneck restricting the quality of workovers.

The pump house’s maintenance process is too rough, the inspection standards are too far from the new pump, and the leakage is large.

2.Scaling of plunger and pump barrel

Suppose the injected water and formation water are not compatible.

In that case, it will cause the wellbore to foul, making the composition of the downhole produced fluid more and more complex, and the salinity becomes higher and higher.

The possibility of scaling on the pump barrel is increasing.

Scaling in the wellbore increases the resistance to oil flow. Rising in the pump barrel can easily cause the pump valve to leak, severely causing the pump to jam and reduce pump efficiency.

3.The structure of the oil well pump

The ordinary oil well pump does not have any sand-retaining and scale-scraping measures in the structure, and there is a cone at the end of the plunger.

During the oil well pump’s reciprocating movement, the sand particles directly settle to the plunger and the pump.

In the barrel gap, and the sand control groove on the pump plunger only has sand retaining and sand scraping performance, removing sand from the sand control groove is not considered.

After the sand is stored in the sand control groove, the pump barrel will also be worn, or the pump is stuck.
Sand control pump
4.The wear and corrosion of the valve cover of the valve seat

The sucker rod is connected with the piston through the piston rod, and the reciprocating movement makes the swimming valve cover carry asymmetrical variable load stress.

During the valve opening and closing process, the continuous impact caused abrasion and fatigue damage to the valve’s inner wall.

As the well fluid outlet, the valve cover changed the direction of the fluid flow and was scoured and eroded by the fluid flow, which eventually caused fracture failure.

What we call the failure of the valve cover is because of this reason.

The valve seat will be eroded by liquid flow and solid objects for a long time, causing the sealing surface to be loose and eventually fail.

5.The clearance between the plunger and the pump barrel

The fit between the plunger and the pump barrel is a clearance fit of reciprocating motion. The pump barrel’s relative movement and the plunger rely on the tiny gap between the mating surfaces to seal.

Also, at the same time, this tiny gap ensures that there is always a certain amount of liquid leakage between the plunger and the pump barrel, which plays the role of lubrication and cooling.

For certain well conditions, the pump gap is an important technical parameter of the oil well pump. The pump gap size directly affects the efficiency of the oil well pump and affects the pump inspection cycle.

6.Sand production in oil wells

When the sand production in the oil well is large and the water cut is high, the sand particles in the formation of oil are mixed in water formation. Since the sand-carrying capacity of different media is the same as the medium’s viscosity, crude oil’s consistency is much greater than the density of formation water.

Under the same flow velocity, the sand-carrying capacity of formation water is poor. Some sand particles will sink under the action of gravity.

Before the pump is completely stuck, the plunger’s relative movement and the pump barrel will cause scratches on the plunger’s surface and the inner surface of the pump barrel.

A large number of scratches will reduce pump efficiency.

sucker rod Pumping work

7.Pumping depth

The depth of the deep well oil pumping will increase the load on the oil well pump.

This will increase the pressure and friction between the plunger and the pump barrel.

The hydraulic force of the well fluid on the plunger and the pump barrel will increase.

Flushing will also increase; coupled with the effects of other factors mentioned above, pump failure will accelerate.

8.Well structure

An ordinary pump barrel should be 3.68 meters long. If the wellbore is not vertical, such as horizontal well, inclined well, or dogleg, the plunger and pump barrel may be deformed. Local contact will increase local wear and corrosion between the plunger and the pump barrel.

9.Gas influence

After a large amount of gas enters the deep well oil pump, the gas occupies a given volume in the pump barrel, which reduces the fullness of crude oil. Moreover, the gas is compressible, causing the fixed valve and the moving valve to fail to open or close lag during the piston up and down strokes. This problem will reduce the efficiency of the deep well pump.

Preventive measures for the failure of deep well pumps

The environmental safety of the control oil pump must have both internal protection and external cleanliness.

The extraction of crude oil is unique. The long-term extraction of crude oil will cause certain damage to the oil pump.

The original pollution will cause the oil pump to block or even completely stop working.

During the inspection of the deep well oil pump, the personnel should clean the oil pump to ensure that the oil well has a clean and tidy external environment.

The falling objects and sand in the oil well pump must be filtered to prevent the pump’s contamination and cause the pump to appear security risk.

The right pump for oil and gas delivery

In all parts of the world where oil and gas are extracted, different requirements must be observed, for example, Sulphur content.

In exploration, it is often required to transport multi-phase mixtures safely.

In this case, centrifugal pumps are generally the right solution.

This is because these pumps can safely handle viscous media contamination with solids, which often occur.


The advantages of deep well oil pumps include the following.

  • This pump never has to be primed
  • These pumps are very efficient


When it comes to choosing a well oil pump, more information is mandatory.

Several variables play a direct role in how long a pump will last and how it will operate.

Meaning, you need to take time and choose the right pipes depending on their need.

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