About Us

Ellison Fluid Calipers (EFC) is a cement engineering company with over 40 years of experience. For most of our history, EFC predominately worked in the Permian Basin. As of 2019, the company has gone through a generational restructuring and is expanding to oilfields around the globe.

Quick Facts

  • Headquartered in Allen, Texas.
  • Operations based in Odessa, Texas.
  • Founded in 1979 in Hobbs, New Mexico.
  • Over 40,000 fluid calipers successfully run.
  • Over 200 current MSA’s, including with all of the supermajors operating in the Permian Basin.
  • Fluid caliper desk in Dallas is manned 24/7 and all calls are answered by a professional.
  • EFC is compliant with ISNet, PEC, Avetta, and NCMS. All staff are SafeLand and H2S compliant.


Jason Ellison


Jason joined Ellison Fluid Calipers in 2012 as part of a long-term succession plan to take over the business.  After holding various positions, Jason became CEO in 2019 with the goal of expanding to oilfields around the globe.   During his tenure, Jason has been directly involved with research and enhancement of EFC’s intellectual property, specifically for high viscosity situations, higher pump volumes, and larger hole sizes.  Jason graduated from the University of Texas at Dallas with a B.S. in Accounting and a Master in Business Administration.  Prior to his work in the oil patch, Jason owned several small businesses after starting his career in audit for KPMG.




Chuck Ellison

In 1980, Ellison Fluid Calipers was started by Chuck Ellison in Odessa, TX. Chuck has a M.S. in Geology/Geophysics.  He has over 40 years of experience in the oilfield and has over 35 years’ experience in fluid dynamics.  During Chuck’s study of fluid dynamics, he was able to perfect the fluid caliper by cross correlating 6 different factors: Hole size and Pump Volume, Viscosity and Density, Rotary Speed and Hole Load.  To this day, Ellison Fluid Calipers is the only company to do so.   With tens of thousands of fluid calipers run, we have accumulated a client list of 250+ oil companies, both majors and independents.