The Subsurface Control Valve III (SSC III) is the only subsurface safety valve in the industry that will support up to a million pounds of drillstring, providing operators with a safe, efficient, and cost-effective means to secure rigs and to evacuate personnel when the threat of a hurricane or typhoon arises.
The SSC III storm valve is a combination ball valve and backoff joint with a unique retrieving head that allows operators to close in a well that is being drilled without having to pull the workstring. The valve reduces the time and risks when repairing blowout preventers or leaving all pipes standing in the derrick during a storm.
The SSC III valve (3.5-in. ID and 8.5-in. OD) supports a working pressure of up to 8,000 psi (55 158 kPa) with a working tensile rating of 1,000,000 lbs (453 592 kg). Published charts for hang-off weight and pressure test limitation show a tensile rating of 1,204,766 lbs (546 473 kg) with a maximum hanging weight of 1,000,000 lbs when used with the high-strength RTTS™ packer (13-3/8-in. casing) at 1,000 psi (6895 kPa). The SSC III valve features a unique overshot for non-rotating detachment, employing a right-hand quarter-turn torque to set and detach, then to reattach positively.
The SSC III valve reduces rig costs and personnel exposure time—two factors that become vital during hurricane season. Halliburton's subsurface control valves have proven reliability, successfully controlling more than three-quarters of the Gulf of Mexico wells during the 2005 hurricane season.