How to extend the service life of the forced valve?

There are several types of artificial lift pumps, including are sucker rod pumps, gas lifts, hydraulic pumps, progressive cavity pumps, jet pumps and electric submersible pumps. The selection of a suitable type of artificial lift is based on the reservoir profile, which are parameters such as water production, sand production, solution gas-oil ratio, and surface area available at the surface.

Due to its capability in handling huge volumes of oil, electrical submersible pumps are one of the most familiar types of artificial lifts in the industry.

However, due to the harsh nature of the well environment, sucker rod pump operators are faced with many operating challenges. This article will explore those challenges and a variety of potential solutions.

The inclined wells refer to wells with inclination angles in drilling engineering. The wellhead and the designed target point are not on the same vertical line, but are wells that deviate from the vertical line of the wellhead by a certain distance in a given direction according to human needs.

With the continuous improvement of exploration and development requirements, the proportion of directional wells, horizontal wells, multilateral wells, etc. in the drilling is increasing, and there are different inclined well sections in these wells.

In recent years, with the increase in the difficulty of oil well production, the application of inclined wells and high-angle wells has increased, and the demand for deep well pumps in inclined wells has also increased.

inclined well

In the existing technical capabilities, the forced valve passage in the inclined well pump uses a movable pin shaft and pin shaft hole plus spring forced reset structure.

However, the forced valve of the inclined well pump in the existing technology has a pin shaft and a pin shaft hole that are easy to wear and become larger and lose the limit function, which causes the return spring to compress and break, which makes the life of the forced valve short.

Forced valves fail frequently in a short period of time, causing the production process to be interrupted, affecting work efficiency, and causing greater economic damage.

inclinned well oil recovery

In order to solve the above problems, extend the service life of the forced valve. Sanjack Group has developed a technical problem that provides forced closing of suction valves and inclined well pumps to alleviate the shortcomings of existing forced valves, which affect the working efficiency and cause economic losses. The structure diagram of the forced valve is as follows:

forced valve oilfield

100 Forced shutoff suction valve 800 Step Slot
200 First valve cover 900 Liquid flow hole
300 First return spring 110 First centralizer
400 First Valve ball 120 First pressure seat connector
500 First valve seat 130 Barrel assembly
600 Valve ball limit step 140 Plunger assembly
700 Accommodating hole 150 Front close discharge valve

force valve


151 Positioning pin
152 Second valve cover
153 Second Return Spring
154 Second Valve Ball
155 Second Valve Seat
156 Step
157 Second arc-shaped flow channel
158 Second pressure seat connector
159 Plunger Body


The new design uses a forced reset structure without a pin. Specifically, the first valve ball is provided with a valve ball limit step and when the hydraulic oil in the suction valve is forcibly closed to drive the first valve ball to move. The first valve ball can move along the valve ball limit step and the first valve seat moves directly through the passage.

Moreover, the first valve ball can respectively contact the valve ball limit step or the first valve seat. Among them, the valve ball limit step is used as the maximum limit position for the movement of the first valve ball, and the valve ball limit step is used to define the first valve ball, and the high jump of the first valve ball is restricted by the stepped surface, which has the righting of the first valve ball Effect, and the limit is reliable.

Both ends of the first return spring respectively contact the inner wall of the first valve cover and the first valve ball.

The first return spring has an elastic tendency of the first valve cover to bring the first valve ball closer. Because the first return spring is always in a compressed state directly in the first valve cover and the first valve ball. Therefore, the first return spring will not cause excessive deflection during the up and down compression movement, and will not wear the outer ring of the first return spring, which can effectively avoid the wear-out failure and alleviate the short life of the forced valve existing in the prior art.

Technical problems that affect work efficiency and cause economic losses. It can solve the problem that the valve pair in the inclined well pump is not easy to close, can greatly improve the pumping efficiency of the inclined well pump, increase the oil well fluid production, and effectively improve the overall working life of the inclined well (deep well) pump. Significantly extend the inspection cycle of pumps and save the cost of inspections.