PR Newswire | May 10, 2021 04:01PM EDT

Callon Petroleum

05/10 15:00 CDT

U.S. Well Services Announces Successful Electric Fracturing Field Trial with Callon Petroleum HOUSTON, May 7, 2021

HOUSTON, May 7, 2021 /PRNewswire/ -- U.S. Well Services (Nasdaq: USWS) ("USWS" or the "Company") today announced it has performed a successful electric fracturing field trial with Callon Petroleum ("Callon"), completing over 160 frac stages in 23 days on a three well pad located in the Midland Basin. The Company estimates that by using the Clean Fleet(r) electric fracturing solution rather than a conventional diesel powered frac fleet, Callon eliminated over 270,000 gallons of diesel fuel and reduced CO2, particulate matter and NOx emissions.

"U.S. Well Services is proud of the work we performed for Callon," commented Joel Broussard, USWS' President and CEO. "This trial once again demonstrated the Clean Fleet(r) technology's ability to reduce completion costs through fuel savings and minimize the environmental impact of well completions. It is exciting to work with a best-in-class E&P operator like Callon and help them explore the benefits of electric fracturing. We look forward to building upon our relationship with that organization and continuing to deliver results on their behalf in the future."

About U.S. Well Services, Inc.U.S. Well Services, Inc. is a leading provider of hydraulic fracturing services and a market leader in electric fracture stimulation. The Company's patented electric frac technology provides one of the first fully electric, mobile well stimulation systems powered by locally-supplied natural gas, including field gas sourced directly from the wellhead. The Company's electric frac technology dramatically decreases emissions and sound pollution while generating exceptional operational efficiencies, including significant customer fuel cost savings versus conventional diesel fleets. For more information visit: www.uswellservices.com. Information on our website is not part of this release.

Contacts:Josh ShapiroVice President, Finance and TreasuryIR@uswellservices.com

Dennard Lascar Investor Relations(713) 529-6600USWS@dennardlascar.com

SOURCE U.S. Well Services, Inc.