The KetaSpire XT family of high-performance thermoplastics provide particularly good candidate materials for down-hole and chemical processing equipment components. In NORSOK M710 sour gas testing with 50 days’ exposure to 20% H2S at 230oC, and in brine/HC exposure testing at 300o for 14 days, PEEK XT performed comparably to traditional PEEK, a polymer that has achieved long-standing and widespread acceptance for reliability in the oil and gas industry.