By Blake Brittain
       Aug 24 (Reuters) - Halliburton         failed to
convince a U.S. federal jury on Thursday that a unit of rival
oilfield services company ProFrac          infringed its
electric-fracking patents.
    The jury in Waco, Texas, agreed with ProFrac's U.S. Well
Services that the company's "Clean Fleet" technology did not
work in the same way as Halliburton's patented technology for
electric fracking, or "e-frac," which has a smaller carbon
footprint than traditional fracking.
    The jury also determined that two of the three Halliburton
patents at issue were invalid.
    Halliburton attorney Roger Fulghum said that the company was
disappointed with the verdict and considering its appeal
options.
    U.S. Well Services attorney Tom Melsheimer said the jury
recognized that the company "did things our way and didn't need
any Halliburton technology."
    E-frac uses electricity from natural gas or power grids to
drive pumps instead of diesel fuel. Oil and gas companies have
been adopting the technology in efforts to reduce the carbon
emissions created by fracking.
    Halliburton countersued U.S. Well Services in response to a
patent lawsuit that it brought in 2021 over Halliburton's e-frac
fleet. U.S. Well Services' patents from that case have since
been declared invalid by the Waco court and a U.S. Patent Office
tribunal.
    Halliburton has also filed two other e-frac patent lawsuits
against U.S. Well Services in Waco that are scheduled for trial
next year. 
    ProFrac, a Willow Park, Texas-based oilfield services
company backed by billionaires Dan and Farris Wilks, bought
Houston-based U.S. Well Services last year.

 (Reporting by Blake Brittain in Washington, Editing by Alexia
Garamfalvi, Daniel Wallis and Sandra Maler)