Filed on April 15, 2021 before Judge Alan D. Albright in the Western District of Texas, this case pitted Halliburton Co. and co-plaintiff US Well Services LLC against US Well Services Inc. and energy operator Cimarex Energy Co. The plaintiffs asserted seven U.S. patents — including US9745840B2, US9611728B2, US8789601B2, US10408030B2, US9970278B2, US9410410B2, and US10337308B2 — covering core technologies embedded in Halliburton’s All-Electric Fracturing Fleet and its 5000HHP Zeus Electric Pumps, a product line positioned at the forefront of electrified oilfield completions.

The case closed on March 5, 2025 when the Clerk of Court was directed to close proceedings following the Court’s Order of Dismissal (ECF No. 501). The basis of termination is recorded as ‘Case Dismissed,’ but the public docket entry does not expressly specify whether dismissal was entered with or without prejudice, leaving the precise legal finality ambiguous from the available record. Both parties had engaged substantial counsel — Baker Botts, McDermott Will & Emery, and Winston & Strawn among them — suggesting the dispute was actively and vigorously litigated throughout its lifecycle.

At 1,420 days, the case duration is notably prolonged even by W.D. Texas standards, suggesting complex claim construction proceedings, likely inter partes review activity on one or more of the seven patents, and the logistical complexity of multi-party litigation. The involvement of Cimarex Energy Co. as a co-defendant — an end-user operator rather than a technology competitor — is consistent with plaintiffs pursuing downstream infringement liability alongside the primary equipment rival. What ultimately drove the dismissal, and whether any commercial resolution accompanied it, remains undisclosed in the public record.