Oil Field Pressure Control Services SOS is equipped with a full range of Equipment, Instruments and Facilities to International Standards for carrying Pressure Control works in conjunction with API procedures. Specialist welding, Heat Treatment and Full Stress Relieving is used in conjunction with the machining process when required. The following are the range of services offered under the Pressure Control facility. Repair and Service of Pressure Control Equipment. Full overhaul including machining, welding, PWHT and pressure testing. Production Well Head and X Mas Tree components. Blow out preventors repair & re-certification. Hydrostatic testing upto 30,000 PSI. Calibration of PSV with both water upto 30,000 PSI and nitrogen upto 10,000 PSI. Certified API 6A Licensee. On-site installation & retrieval of tubing housing pugs. Well head/ choke manufacture and refurbishment. Weld overlays/ in lays. Hard facing. SOS is uniquely qualified in Kuwait, by HYDRIL USA, as their official Authorized Repair Facility.