Applied research and development activities at Numerical Solutions are centered around the
development of four advanced computer projects.
Historically control systems available for
electrically driven PC pump surface drives are few and far between.
Examples of existing control equipment show that the current state of the art equipment is still very
primitive.
Typically this equipment is a modification of an existing control device. Its suitability for providing PC pump
control is, in some cases, compromised by this generic approach. In other cases, the company has used only
minimal amounts of empirical field data before making the product commercially available. A close study
of the above equipment shows that there is much room for improvement, and competent, reliable control
products specifically designed to meet PC Pump requirements are not yet available.
This project employs the use of a single low cost sensor to provide the necessary torque information for control
of an electrically driven PC pump surface drive. This product is unlike any PC pump control product currently
on the market. It employs proprietary technology to calculate both polished rod torque and RPM. From this
information it decides if the surface drive needs to be shutdown due to a problem with excessive torque or unusual
fluctuations in torque suggesting a problem with the pump, rod, or surface drive. Complex algorithms that have
been derived from direct oilfield observations avoid unnecessary downtime, while maintaining the
best equipment protection possible.
Top of the page
Shown here is a proprietary VFD motor control operating a 1.5hp 3 phase motor. This prototype experiment
validates the possibility of building a VFD designed specifically to operate a PC pump. The benefit of
developing this type of VFD are many, and can be summed up as follows:
- Lower price.
- Better reliability through simpler design.
- Easy field installation and operation.
- Small size.
- Superior equipment protection from PC pump specific control algorithms based on actual PC pump field data.
- Lower support costs from better product design.
- Increased customer satisfaction.
Top of the page
A PC pump product to provide actual measured torque values from the polished rod. Designed to
stay on the well indefinitely and capable of operating in all weather. This device can provide control
to both electric and non-electric (as shown below) PC pump drive systems.
