Yep, the Chinese will get screwed. US oil is banned from being exported. So it basically will be US workers pumping US oil, for US markets, paying US oil taxes, run by basically the same Texas oil operators who have been doing this for decades, except the land and mineral rights will be owned by a Chinese holding company.
Texas oilmen have been doing this for generations. They'll run rings around the Chinese company during contract negotiations, leaving it high-and-dry and 100% exposed to any loses in a highly volatile market, while the Texas extraction outfits will use creative accounting and other gimmicks to run up their expenses as high as possible. They'll be laughing all the way to the bank.
Just as an FYI ... Raw crude oil can’t be exported, but there’s nothing illegal about exporting refined petroleum products.