Denver-based Liberty Oilfield Services Inc. is reporting a “slowly improving market” in the Lower 48 for pressure pumping services, with customer conversations becoming more constructive, CEO Chris Wright said Wednesday.

Speaking during the 1Q2021 conference call, Wright noted that the oilfield services (OFS) operator has doubled the size of its platform since the start of the year. It is now a “fully integrated completions services, engineering and diagnostics company,” and one of the leading OFS operators in the Lower 48. The growth followed the takeover of Schlumberger Ltd.’s OneStim hydraulic fracturing business, which services the Lower 48.

“The Liberty OneStim combination has been extraordinary.” Wright said. “We’ve doubled the size of our business” and...