Ellis Williams began his life’s work with mud pumps in 1942. Over the next 30 years, Ellis pioneered single-acting, triplex pumps for oilfield drilling while working for Brewster (the Skytop Brewster triplex pumps). Ellis Williams also left his mark on the IDECO and EMSCO mud pump companies. By the 1970s, most pumps in the industry were designed by Ellis Williams. Clearly, he was ready to design and build superior mud pumps under his own banner. And thus, in 1974, the Ellis-Williams Company (EWCO) was born. The Ellis-Williams Engineering Company (EWECO) soon arrived on the scene.

For more than 30 years, the name Ellis Williams was synonymous with efficient, innovative and extremely durable pumps. Ellis Williams originated the use of roller bearings in all bearing locations, fully welded eccentric crankshafts and internal gears for inherently improved balance. Ellis also wrote AGMA Standard (424.01) Practice for Helical and Herringbone Gearing for Oilfield Mud Pumps. The company became known for designing and building drilling pumps without comparison in the industry.

Weatherford acquired Ellis-Williams in 2008, aiming to leverage Ellis-Williams’ years of experience and the tradition of full-service engineering for pumps and pump packages.

As dynamic and rewarding as the Ellis -Williams history has been so far, the most exciting chapters lie ahead. EW Pumps is a privately held company that purchased all of the assets and IP of the Ellis-Williams Pump product line from Weatherford in 2020. The three principles of EW Pumps all are stakeholders in the business and experienced in all aspects of the oilfield service & equipment (OFSE) business, specifically the drilling segment.

Ellis Williams wrote the book on mud pumps — and a new chapter is being written today by EW Pumps.

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