... offshore platform 2,Max.15000psi 3,Standard: API 4,Size:2-1/16"~9" API Oil Wellhead Equipment 1.Fix drilling wellhead, connect wellhead ... wellhead pressure and adjust flow rate, also induce oil into outlet pipeline, shut off oil well when necessary, and apply to acid fracturing ... safety valve 5.Working pressure: 2000Psi-15000Psi 6.Working medium: oil, natural gas, mud .7.Working temperature:-46°C C-121 ...