Pumping Well Pumping Efficiency Pumping Efficiency Influencing Factors

Pumping pump working characteristics：

The working principle of suction pump is consistent with that of reciprocating pump, but its structure and working parameters are special due to the constraints of working conditions.

In terms of the structure of the pumping pump, in the actual oil recovery process, when the borehole size changes, the vertical structure of the pumping pump displacement needs to rely on the change of the pump length to achieve to meet the pumping pump’s operational requirements.

In the oilfield oil recovery process, the pumping depth is generally less than 3,000 meters, so there is a certain difference between the upper and lower parts of the pump to withstand the pressure, in order to ensure the reliability of the pumping pump, need to pay great attention to the pumping pump closure problem. In order to effectively cope with the pressure problem, need to strictly control the pumping pump plunger and pump cylinder wear resistance.

Pumping pumps work process, sand and high mineralization of water and other natural environments have a greater impact on the pumping pump, so pumping pumps need to pay great attention to such factors in the process of pumping pumps to ensure that pumping pump pumping efficiency reliability.

Factors affecting the pumping efficiency of the pump：

1. The impact of the oil recovery operating environment on the pumping efficiency of the pumping engine wells:

In the whole process of specific oil extraction, due to the different working conditions of oil extraction at the site, the geological structure of oil extraction is different standards, so it is inevitable that the pumping efficiency will have a certain impact on the pumping efficiency.

Geological structure elements are unavoidable.

The impact on pumping efficiency is specifically manifested in the following levels: first, it is due to the occurrence of sand production in the geological structure, so that the pumping efficiency is affected to a certain extent. Some oilfields are bulky due to the fluffy nature of the oil layer.

When mining to a certain extent, the pressure of the nature of the oil layer will also be reduced, resulting in the soil quality of the gravel is getting lower and lower, which in turn prompts a more serious phenomenon of sand production.

Due to the emergence of sand phenomenon leads to the gap between the piston and the pump barrel will increase, resulting in the pumping efficiency of the pumping well caused by the decline;

In addition, due to the production pressure of the oil formation will be gradually reduced with the increase in the level of extraction, resulting in the underground kinetic energy is insufficient.

Can not produce excellent practical effect on the pumping well, resulting in a decline in the pumping efficiency of the pumping well; there are also some difficult oil and gas wells, low casing pressure, low degree of submergence, in the specific extraction of the whole process is prone to problems.

In this case, the working pressure that the well pump can draw from the outside world will become extremely unstable, and it is likely to damage the fluidity of the working pressure in the pump barrel, so much so that when the crude oil gushes out from the ground, the working pressure will be unstable, resulting in a reduction in the high efficiency of the pumping well.

2. Abrasive leakage

General four-hole fixed bonnet overflow, fluid friction resistance, valve ball jump high.

The total area of the oil flow path is not very reasonable, and the flushing force on the sealing surface is large, and the damage to the sealing element of the oil well pump is relatively large.

In the second half of the oilfield development design, oil and gas wells have a large amount of water, gas sand, etc., coupled with waxing, collagen fiber leaching, corrosive substances and other comprehensive impact that will cause the pump and valve opening and closing hours of the high-speed liquid flow through the surface will produce a specific water washing marks. Due to the general low strength of the valve parts, wear resistance is poor, easy to cause damage to the valve parts.

When encountering high sand content wells, the fixed valve is closed, due to the sand particles on the raised surface, the valve damage is serious. In addition to the sealing is not very good, often open and close.

The raised surfaces are easily damaged, which exacerbates leakage and puncture damage.

For some oil and gas wells with slopes, the fixed valve back-off or high-pressure gate valve is partially worn out, resulting in leakage.

Large inclination wells in the pump hanging well inclination is large, the valve ball and high-pressure gate valve line contact is not uniform.

When the valve is closed, it contacts one side for a long time and produces a single impact, which is easy to cause leakage.

3. Impact of pumping unit well’s own parts performance on pumping efficiency

Pumping wells are responsible for extracting crude oil, and they are composed of many complex parts.

Therefore, the characteristics of each part are caused by problems that can affect the work of the whole system and cause a reduction in pump efficiency.

First of all, the damage of the oil screws can also affect the pumping efficiency of the oil pumping well. On the first day of operation of the oil pumping well, the oil screws will be damaged.

In practice, it is impossible to maintain a relatively high degree of consistency between the clamps and the tubing body in operation for a long period of time, and it is inevitable that damage will be caused to the oil pipeline screws.

In addition, when cleaning the pipeline, usually because the pipe is not cleaned up the dirt, damage to the pipeline screws, and the last key factor is that with the change of time, the various components will inevitably appear aging, the impact of the pipeline screws is inevitable.

The occurrence of several of the above situations can lead to a decline in the high efficiency of the pumping well.

The efficiency of the pumping pump can be greatly reduced due to the effect of the pumping rod structure.

In addition to the pumping rods for specific oil recovery, there will be a lot of friction in the middle of the pipeline, which will reduce the space of the piston rod and affect the efficiency of the pumping pump.

According to the relevant data statistical analysis, the longer the rod and pipe, the lower the efficiency, in the specific manufacturing, if the oil must be extracted in deeper geological formations, it is necessary to further deepen the pumping rod and its pumping pipe.

The increase in the length of both will cause a lot of kinetic energy caused by the loss of the efficiency of the pump has a very obvious impact.

4. Influence of geological factors

As the oil layer will reduce the efficiency of the pump.

For example, sand is produced in the oil well. A large number of sand particles block all the normal fluidity of the liquid, and large sand particles entering the oil pump can cause the pump to jam. If the pump gets stuck, a more serious situation can cause the pumping rod column to break.

If the pump is stuck in a serious condition, pump inspection work must be performed, which can increase the cost of repairing oilfield machinery and equipment as well as production costs.

If there is too much gas, there is too high a gas content in the downhole fluid, or the temperature of the transported fluid is too high, vaporizing the solvent.

Many gases entering the oil well pump can cause airlock, resulting in the pump not producing oil.

Throughout the process, when the working pressure changes, it only affects the volume of gas in the pump. When the working pressure increases, the gas volume becomes smaller, and when the working pressure decreases, the gas volume increases, resulting in extremely low pump efficiency.

If the oil well is seriously waxed, the wax will crystallize and precipitate, occupying the wall space of the pump, making the flow path of the discharge pipe smaller, increasing the frictional resistance of the discharge pipe, and possibly underfilling the pump. Resulting in lower pump efficiency.

The high viscosity of oil leads to slower fluidity and high resistance to fluidity.

Before the oil well pump enters the pump, it enters the discharge stage, and the suction stage is not carried out, which is easy to cause the pump to be poorly charged.

The main feature is that the pump efficiency is reduced.

When the oil contains corrosive water and hydrogen sulfide gas, it will corrode the pump parts, especially the valve parts and other parts, causing leakage leakage and reducing the efficiency of the pump.

Pump efficiency Calculation – YouTube