Flow Loop Testing of The Downhole Gas Compressor
Testing of the downhole gas compressor began in January 2007 at our bespoke simulation rig at Spadeadam, Cumbria, UK (see photo below).
Corac Group plc's test facility can be used to validate performance and specific test conditions for Downhole Gas Compressors with a variety of gases, including nitrogen and methane. The facility is able to replicate downhole conditions, including representative pressure, temperature, flow rate, gas composition and liquids. The rig can be heated to 150°C and operate at pressures up to 80 bar, simulating the majority of gas well behaviours, and can introduce liquids and some fines to test performance at increasing liquid gas ratios and erosion.
Initial tests are conducted using nitrogen, and water can be added to create two-phase flow. Later, methane and hydrocarbon condensate is used as testing matures. The test programme began with single DGC modules that have operated successfully at its full design speed, pressure, temperature and flow rate. Testing then focuses on reliability and operability (ie. start-up, shut-down and transient behaviour). Final tests include a full string of modules including their power electronics.
The objective of the tests is to prepare the DGC for field trials targeted to start in Q4 2009.
Read comments from JIP participants who witnessed testing at the facility.
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