Research on Negative-pressure Suction Reduction Technology for Offshore Drilling Fluid Wastes
Due to the challenges of large total volume,high transportation costs,and limited deck space for the recovery of offshore drilling fluid wastes under the backdrop of"zero discharge",conventional cuttings reduction processes face difficulties.These processes typically involve placing reduction equipment at the end of screw conveyors,leading to increased viscosity of cuttings due to the mixing action of the screw,exacerbating the difficulty of solid-liquid separation and resulting in suboptimal reduction effects.Based on negative pressure suction technology,an optimization and improvement of conventional reduction processes have been undertaken.A downsized source reduction and separation technology and device have been developed,with equipment processes being placed upfront.By adding a small-scale solid-liquid separation device below a vibrating screen,a"zero discharge"cuttings reduction process along with drilling has been established.This technology has been tested on two wells at the C platform in the Bohai Oilfield,yielding promising results and demonstrating the on-site capability of simultaneous drilling waste treatment.The feasibility of negative pressure suction reduction technology has been verified.Occupying minimal space and being easy to install,this device significantly reduces drilling fluid loss and enhances cuttings drying,providing a technical approach for the disposal of offshore drilling fluid wastes under the"zero discharge"context.It holds considerable potential for wider application and serves as a valuable reference for similar endeavors.
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维普
