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Back Pressure Valve
In response to industry demand National Coupling Company (NCC) has developed a new line of Specialty Valves, beginning with a Back Pressure Valve (BPV). Industry requirements specified a direct need to prevent chemical head pressure in deep wells from self-injecting into declining production pressure. This valve was designed to act as a fail safe closed valve for the umbilical line where chemicals are injected into the well at the sea floor. The NCC BPV was specifically engineered to ensure positive pressure within the umbilical line and to prevent sea pressure from crushing the supply line.
Material selection for the valve exceeds material requirements dictated by the functional design specification. This valve will be internally exposed to all control fluids and injection chemicals within the umbilical line. Externally, the valve will be immersed in sea water with a pressure-compensated and oil filled sensing chamber. The valve will open at 800 psi above sea pressure. This accomplishes two primary goals: First, it prevents deep umbilical lines from crushing due to loss of internal pressure. Should the line be crushed by subsea pressure, the downtime and replacement cost could equate to millions of dollars. Second, it prevents valuable chemicals from being dropped into the well during low production pressure. In addition to the inherent capital savings potentially exhausted on wasted chemicals, the system also allows operators to maintain chemical injection consistency.
The NCC BPV is designed for life-of-well service with no intermittent adjustments. The valve is metal seated, leak free, repeatable operation. It has an operating pressure rating of 15,000 psi and an operating temperature range of 32 to 104 degrees F. Flow capacity is Cv = 0.1 at a fully open position with a pressure increase over a set point of less than 100 psi.
Sub-Plate Mounted Valve
In addition to BPV’s NCC has also developed a new line of Sub-Plate Mounted Hydraulic Control Valves (SPM) designed for blow out preventer control. The NCC SPM valve sizes range from ½” to 2” and are designed to flow under pressures up to 5000 psi. The SPM valve functions as a directional control device that is pilot operated either by direct means or solenoid operated. Once the valve receives the pilot signal it functions from a normally opened or closed position, either allowing or shutting off the high flow/high pressure circuit to function the blowout preventer rams, connector functions or the annular BOP preventer.
The NCC SPM product has already entered the market with great success and we are excited about the amount of interest shown by our customers. NCC is also developing a line of Hydraulic Pressure Regulators as well as subsea Hydraulic Shuttle Valves for BOP applications. It is NCC’s goal to produce reliable, high quality solutions for our customers in the oil and gas industry. As the market continues to ask NCC to solve industry problems, we will continue to provide solutions for today’s market.
National Coupling, Inc. welcomes the opportunity to work with you on the design of Valve solutions that offer the highest reliability for your specific application. Please feel free to contact our experienced sales team via telephone at 281-208-6708 or via email at info@nationalcoupling.com. |
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