Treatment method and treatment system for waste drilling mud

• Main Authors: LIU QING, WANG XIN, PAN SHEWEI, WAN YONGBO, XUE GUANGHAI
• Format: Patent
• Language: Chinese; English
• Published: 04.06.2024
• Subjects: CHEMISTRY; EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; METALLURGY; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention relates to the technical field of treatment of well drilling waste mud, in particular to a treatment method and a treatment system of well drilling waste mud. The treatment method comprises the following steps: S1, mixing the drilling waste mud with an auxiliary agent to obtain a solid-liquid mixture; s2, carrying out filter pressing on the solid-liquid mixture to obtain a first oil-water mixture and oil sludge; s3, standing and layering the first oil-water mixture to obtain oil and heavy salt water; s4, mixing the oil with the oil sludge; meanwhile, heating and evaporating the high-salinity water at the temperature of 100-110 DEG C to obtain water vapor and salt; condensing the water vapor to obtain low-salt water; s5, carrying out gel breaking, demulsification and centrifugation on the oil sludge to obtain a second oil-water mixture and a solid mixture; and S6, standing the second oil-water mixture to obtain oil and low-salt water. By optimizing the treatment process, the harmless treatment of