NOV SETS NEW STANDARDS FOR SSSV’S WITH THE TEJAS TRSV
NOV has set new standards for SSSV’s with the Tejas TRSV. Subsurface safety valves (SSSVs), which are standard and often statutorily required in the oil and gas industry for upper completions, were first developed in the late 1930s. By the 1970s three companies had established themselves as industry leaders as SSSV suppliers in the field: Otis Engineering (now Halliburton), Baker Hughes (now Baker Hughes, a GE company) and Camco Products and Services (now Schlumberger). Implementation of SSSVs grew, but it was not until the Piper Alpha incident of the late 1980s that regulations truly shifted. The explosion on Piper Alpha and resulting oil and gas fires that destroyed the platform served as the impetus for global regulatory mandates that SSSVs be deployed in offshore wells.
Tejas’ model TRSV(E) SSSVs are tubing-retrievable, surface- controlled, normally closed devices installed in oil and gas wells to control tubing fl ow. Metal-to-metal seals are used in 100% of Tejas’ tubing-retrievable product line, which has products that are rated to 10,000 psig and are suitable for temperatures up to 176 C (349 F) at moderate setting depths. Higher temperature/pressure/setting depths/slimline diameters are available for custom order. The TRSSSV series are API-14A V1 certified and adaptable to any standard or premium tubing thread. The system features a large fullbore, where the inside diameter (ID) is equivalent or greater tubing than the tubing ID to which the SSSV is attached. Additionally, it has either flat flappers (2? in. to 3½ in.) or curved flappers (4½ in. to 7 in.) and a single rod piston featuring nonelastomeric dynamic seals. The TRSSSV is available in either equalizing or nonequalizing trims. The valve is controlled hydraulically with a ¼-in. control line in the well’s annulus, enabling valve closure during an emergency shutdown.
(Source: Andrew Buzinsky and Stephen Forrester, NOV; and Tom Hill, Tejas Research & Engineering)
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