A displacement-varying sucker rod pump is a pump that can switch between two working modes by adjusting the position of an internal disconnect mechanism between the upper and lower plungers.
It adjusts the pump to the changes in the well conditions without the need to remove the tubing string. Hence, the pump is highly effective for thermal recovery wells and production environments with changing conditions.
1. Flexible Production Control
Depending on the condition of your well, you can switch from high-production mode to controlled pumping mode.
2. Great for Thermal Recovery Wells
This is the best equipment for steam stimulation (CSS) and SAGD operations.
3. You Do Not Have to Pull the Tubing
Steam injection and pumping can be done without even removing the tubing string.
4. Getting More Out of Heavy Oil Wells
Does production downtime due to changing viscosities of the crude is a thing of the past.
5. Longer Work-Life
Working condition optimization that leads to less wear and extended pump life (up to 3 years).
Pump bore (mm ) | Length of plunger ( m ) | Length of barrel ( m ) | Range of stroke | Size of connecting tubing | Size of connecting sucker rod | Pump constant | |||
Upper lunger | Lower plunger | Upper barrel | Lower barrel | "off" position | "on" position | ||||
57/38 | 0.9 | 0.9 | 3.6~6.9 | 3.3~6.6 | 1.8~5.1 | 2 7/8 TBG | CYG19 | 3.54 | 1.91 |
70/38 | 3 TBG | CYG22 | 3.54 | 3.91 | |||||
| 70/44 | 3 TBG | CYG22 | 3.54 | 3.35 | |||||
From the design to how it functions, this pump has the following advantages for making it perfect to work with:
Thermal recovery wells (steam injection wells)
Heavy oil wells with high viscosity
Wells with fluctuating temperature conditions
Mature oilfields with declining production
Wells requiring flexible production control
This pump has a disconnect mechanism between the upper and lower plungers that allows it to work in two different modes:
1. Disconnected Mode (High Displacement)
This mode is activated after steam injection.
The pump functions like a large-diameter pump.
It helps to get the most fluid production when the oil viscosity is low.
2. Connected Mode (Feedback Pump Mode)
This mode is activated if the well temperature decreases.
This mode is good for working with high-viscosity crude oil.
In this mode, production is stable and controlled.
With this concept, production can be dynamically adjusted even without changing tubing, leading to a significant reduction in workover frequency.
Deep Wells
Absolutely, it is compatible with standard rod systems and depending on the type of configuration, it can be used for deep well operations.
Sandy Wells
With the use of wear-resistant materials and customized setups, it can be used.
Service Life
The service life can be generally expected to reach up to 3 years based on the work environment.
| Feature | Displacement Varying Pump | RHA Pump | RWB Pump |
| Function | Adjustable output | Fixed | Fixed |
| Flexibility | High | Low | Low |
| Structure | Dual-mode mechanism | Top anchor | Bottom anchor |
| Best For | Variable wells | High gas wells | Deep wells |
| Efficiency | Optimized | Medium | Medium |
Tieling Dongsheng Petroleum Machinery Co., Ltd. was established in 2000. It is a leading oil well pump manufacturer in China, focusing on the design, development and manufacturing of oilfield pumping equipment and downhole tools. The company is a qualified supplier of large enterprises such as PetroChina, Sinopec and Weatherford, with an annual output of more than 20,000 oil well pumps and special pumps. It covers an area of 20,000 square meters, is equipped with 20 technical backbones, and has strong R&D and production capabilities.
Being a professional manufacturer, we offer:
Custom pump sizes and configurations
Material upgrades for corrosive or sandy wells
Design improvements according to well conditions
Get Expert Pump Selection Support:
If you pick the wrong pump, you will have to do workovers more
frequently and your production costs will increase.
Tell us what your well conditions are:
Depth
Oil viscosity
Production target
We will select the right pump that matches your field.
