Deluge has developed a rod pumping system that operates on water
According to a report from the U.S. "Petroleum Technology Magazine," oil prices are on the rise, leading to increased power costs for rod pump operations. To address this issue, Deluge has introduced an innovative natural energy engine that utilizes water as its primary power source, significantly reducing the cost of rod pumping systems.
Carbon dioxide, when stored under high pressure, remains in a liquid state. When heated, it expands by up to 50%, whereas water only expands by about 2%. This property is leveraged in the system: liquid carbon dioxide is placed beneath a plunger inside a cylinder. Warm water is then circulated around the cylinder, causing the COâ‚‚ to expand and push the plunger upward. Once cold water is introduced, the COâ‚‚ contracts, allowing the plunger to descend. By alternating between warm and cold water, the plunger moves up and down, driving the rod pumping system continuously.
A standard 0.61-meter stroke plunger powers conventional rod pumps. The new system, known as the Deluge Artificial Lift 12-24, features a maximum stroke length of 12 inches (0.61 meters) and a load capacity of 2,400 pounds (545 kg). It has been tested in shallow wells and is designed for deeper applications, such as a 915-meter-deep well with a 3-meter stroke.
The largest natural energy engine currently in production delivers 7.4 kW of power and can operate using any available water source. In the Tipotdom oil field, geothermal water at 82°C and 0.21 MPa is used to power the engine. The field has 600 oil wells equipped with modern rod pump systems, where 95% of the produced fluid is water. A timer helps reduce water content, while the device optimizes the pump cycle based on oil inflow time, improving well productivity.
The Hawaii Natural Energy Engine Laboratory conducted indoor tests using deep seawater at 40°C and surface seawater at 85°C. Additionally, a nine-well system operated successfully for 300 hours in an oil field near South Kansas.
This system can pump fluids at speeds comparable to conventional units but with much lower energy consumption. While traditional pumps require 7.4–8.8 kW, the CO₂-powered engine uses only 5.2 kW. With an efficiency of 40%, it outperforms steam or natural gas engines, which typically operate at just 28%.
Test results show that the new engine offers numerous advantages over traditional models. It can generate power ranging from 15 kW to 74 kW or more, has only one moving part, operates without expensive fuel, and reduces operating costs. Its power consumption is just 5% of that of a regular motor, and the cost to produce one cubic meter of crude oil is only $30.
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