Development and Application of High-Efficiency and Low-Pressure Drilling Fluid System
In order to meet the operation requirements of 9 000 m ultra-deep rig in Kuwait,a high-efficiency and low-pressure drilling fluid system was developed.The system is safer,more complex and environmental than similar systems,and can meet the operating conditions of water-based drilling fluid and oil-based drilling fluid.En-ergy-saving agitator,multifunction worm conveyer and dual mechanical seal centrifugal pump were applied to the low-pressure drilling fluid system of 9 000 m ultra-deep rig for the first time,making the system more energy saving and environmentally friendly.The system adopts a dual-channel process,making the channel on the surface of the double-layer drilling fluid tank smoother.A shop test was conducted,showing that the noise of the system is lower than 82 dB,the temperature rise of the equipment bearing is not higher than 32℃,and the process flow is normal to meet the design requirements.Finally,a 2 h operational test and a 2 h joint debugging test were conducted with the rig,showing that the low-pressure drilling fluid system worked stably and normally.The research results enrich the diversity of rig products,and the low-pressure drilling fluid system can be widely applied to ultra-deep well op-erations in Kuwait,United Arab Emirates,Saudi Arabia and other countries in the Middle East.
ultra-deep riglow-pressure drilling fluid systemagitatorworm conveyercentrifugal pumpmixing hopperdrilling fluid tank
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