Data Sheet | TC9814-003 MOZLEY ™ Wellhead Desander Proven efficient separation systems MOZLEY Wellhead Desanders are used to remove sand and other solid particles from multi-phase wellstreams of the wellhead choke. The units can be used as a permanently installed facility or as a temporary well service tool. Overview MOZLEY Wellhead Desanders are utilized at the production wellhead and consist of single or multiple cyclone inserts housed inside a vessel operating at the appropriate wellhead design pressure. These efficient units protect downstream equipment from mechanical damage and erosion. They also prevent partial blocking and settlement of sand in separators that lead to a reduction in capacity. Operating Principle and Key Features MOZLEY Wellhead Desanders typically consist of single or multiple cyclone inserts housed inside a vessel. The cyclone inserts are specifically designed for each application using our proprietary computer simulations. Wellstream fluids enter the cyclone tangential inlet, which forces the mixture to spin, and causes the gas to disengage quickly. Both gas and liquids migrate toward the center of the cyclone, as a reduction in cyclone diameter accelerates the fluid while at the same time generating strong centrifugal forces. The gas and liquid flow then reverses and moves upward towards the overflow vortex finder. Solids are separated from the gas and liquid, forced towards the cyclone wall and travel down the length of the conical section of the cyclone in a spiral pattern towards the solids outlet. The separated solids fall through into the accumulator vessel situated on the underflow of the wellhead desander or a continuous hydrotransport device can be utilized. The accumulator vessel is periodically isolated and collected solids are flushed out. The wellhead desander itself remains on-line and operating while the accumulator is being cleaned. Performance Depending on solids particle size distribution and wellstream properties, up to 99% by weight solids removal is achieved on typical wellhead sand size distributions. Pressure drops are only in the range of 5 to 150 PSIG (0.35 Kg/cm 2 to 10.5 Kg/cm 2 ). Product Range • Up to 30-inch (762 mm) diameter cyclone inserts available as standard with larger sizes available if required • Liquid capacity up to 50,000 BPD (7950 m 3 /day) per wellhead desander • Optional geometry for a range of gas void/volume fractions in oil and gas wells • Housing designs up to 15,000 PSIG (1055 Kg/cm 2 ) • Hydrocyclone insert materials available in stainless, duplex, super duplex steels, a range of ceramics and tungsten carbide PROCESS SYSTEMS SOLIDS