Schlumberger has become the biggest oil-service industry player yet to abandon frack work in North America, a sign that activity in the U.S. shale patch may never revisit previous highs. The provider of drilling and oil-production equipment agreed to sell its U.S. and Canadian fracking business to smaller rival Liberty Oilfield Services Inc. After similar exits over the past few years by Baker Hughes Co. and Weatherford International Plc, Halliburton Co. is now the sole global provider of well completions for shale, and even Halliburton has said it’s looking overseas for better growth.

For Schlumberger, the world’s top oilfield-services company, the deal is a massive reversal from its North American buying binge over the past few years, which added frack-sand mines, artificial-lift technology and Weatherford’s frack fleet. For Liberty, meanwhile, buying Schlumberger’s OneStim unit in exchange for a 37% stake in the company means the oilfield contractor will more than double the size of its frack fleet in a market that has sidelined three-fourths of U.S. crews this year.

“The Covid pandemic has thrown the world for a loop, bringing serious threats to our industry,” Chris Wright, chief executive of Denver-based Liberty, told analysts and investors Tuesday on a conference call. “But these dark hours are most fertile for opportunity.”

OneStim helps customers extract oil and gas from shale wells by blasting water, sand and chemicals underground to release trapped hydrocarbons. When combined with horizontal drilling, fracking launched the shale boom more than a decade ago. But now an historic crash in oil prices along with a glut of fracking gear has triggered a crisis that’s driven some frackers into bankruptcy.

Frack crews are hovering near lowest level on record

The combination with OneStim, which is expected to close in the final three months of this year, will make Liberty the second-biggest U.S. fracker with 2.3 million horsepower, according to Citigroup Inc.

“The last several months have been extremely challenging for the world, the industry and the Liberty family,” Wright said in a statement announcing the deal. “This transaction will be a transformative step forward in our journey as a company.”