Linear Rod Pump
A Revolutionary Sucker-Rod Artificial Lift
Technology
By
Christopher Schmidt
Unico, Inc.
Abstract
For decades, the conventional beam pump has been the standard for operating sucker-rod
pumping systems. Beam pumps, however, are cumbersome, mechanically complex, and difficult
to control when it comes to obtaining maximum pumping efficiency or compensating for changing
downhole well conditions. Unico, Inc., of Franksville, Wisconsin, has developed an artificial lift
technology that is a revolutionary departure from traditional methods.
The LRP® Linear Rod Pump combines variable-speed control, simple mechanics, and
sophisticated software into a compact, lightweight, unobtrusive artificial lift system that directly
controls the sucker rod. Benefits of this type of system include superior speed control, optimized
well performance, energy efficiency, ease of installation, portability, environmental friendliness,
safety, and economy.
We will discuss the mechanical and control design of this unit. Selected field experience of the
product, which has been installed on numerous wells in North America, will also be presented.