Restore surface control without intervention

摘要

Field-proven, MMS-approved technology restores surface control for subsurface safety valves. Subsurface safety valves are critical to safe operation of oil and gas wells offshore and onshore in areas with high hydrogen sulfide levels. Typically, these valves are controlled from the surface through a small-diameter hydraulic line that runs up the annulus behind the production tubing. If this line is compromised (e.g., by storm damage, a lifetime of bending and rubbing, corrosion, or plugging), the valve becomes inoperable. Repairing the control line is usually not an option, so operators have been forced to choose between performing an expensive workover or installing inflexible and unreliable velocity valves or storm chokes that limit production and require expensive maintenance operations.