TETRA Technologies Inc. announced that its majority owned partnership, Compressco Partners, L.P. (Compressco or the Partnership), has entered into a definitive agreement to purchase all the outstanding shares of Compressor Systems Inc. (CSI) for $825 million in cash, subject to working capital and other adjustments. The combined organization will be led by Tim Knox, CSI's current President. Ron Foster will take on the role of Senior Vice President and Chief Marketing Officer, and James Rounsavall will serve as Chief Financial Officer.