Cs formate is the major contributor to Cabot's specialty fluids...

Cs formate is the major contributor to Cabot's specialty fluids divison. No other drilling fluid is as rare or as expensive.

Current oil market doldrums mean however that operators have either postponed or cancelled the activities in the fields where Cs formate fluids would be used.

@manfromgwelo has given a much more detailed answer in his previous posts.