Halliburton, the corporate champion of fraud, corruption, war-profiteering, cronyism, and criminality would know a little something about being virtuous. That’s why the company is now suing BP for its “cover up scheme” during the Deepwater Horizon Oil Spill last summer in the Gulf of Mexico.

Halliburton, which did cement work on BP’s Macondo well, claims in Thursday’s suit that BP provided false information about the location of pockets of oil and gas around the well before the blowout. Halliburton says knowing the location of those zones is critical for a cementing job.

“Profit and greed” were BP’s motives for concealing the information, the lawsuit alleges. Halliburton says it likely would have insisted on redesigning the well’s production casing if it had known about an additional hydrocarbon zone that BP allegedly failed to disclose.

“Such changes would have cost BP millions of dollars on a well that was already painfully over budget and behind schedule,” says the suit, filed in a Harris County, Texas, state court.

It seems like culpability might just be contextual — but I’m not going to take Halliburton’s word on that.