Well drilling waste mud recycling and reusing low-temperature treatment system

Abstract

The invention discloses a well drilling waste mud recycling and reusing low-temperature treatment system which comprises a well drilling waste mud collecting and pumping system, a material distributor, a low-temperature drying mechanism, a steam generating and conveying system and a material post-treatment system. The steam generating and conveying system is connected with the low-temperature drying mechanism; the material post-processing system is arranged at a material outlet of the low-temperature drying mechanism; the well drilling waste mud collecting and pumping system comprises a well drilling waste mud collecting pool, a mud stirrer, a mud conveying pipeline and a single-screw pump, the mud stirrer is installed in the well drilling waste mud collecting pool, one end of the mud conveying pipeline is connected with an outlet of the well drilling waste mud collecting pool, and the single-screw pump is installed on the mud conveying pipeline. The device is simple in structure and convenient to use, the drilling waste mud can keep the original activity of the mud when treated in a low-temperature state, and the device can be reused without waste, has no pollution hidden danger and is low in treatment cost.

Description

technical field [0001] The invention belongs to the technical field of recycling and utilization of drilling waste mud, and in particular relates to a low-temperature treatment system for recycling and reusing drilling waste mud. Background technique [0002] Thousands of new oil and gas wells are drilled every year in my country, and the completion fluid (waste drilling mud, namely drilling waste mud) produced after completion of each oil and gas well is about 100-280 cubic meters, and the water content is as high as 60%. In oil and gas field drilling operations, drilling mud is called "drilling blood", which is mixed with limestone, barite, lubricants, water, high molecular polymers, fluid loss control, salts, additives, clay, organoclay The water-based mud mixture composed of various chemical treatment agents, a number of stable colloidal suspension systems, cuttings and other substances plays a very important role in the drilling operation of oilfield exploitation. Such...

AI Technical Summary

Problems solved by technology

What's more serious is that the leaching solution of waste after burial will still cause serious pollution to groundwater

[0004] In summary, the existing drilling waste mud treatment devices and methods have the following limitations: (1) the process flow is long and complicated, the modules are large in volume and high in investment; Drug breaking treatment, which further increases the complexity of equipment and secondary pollutants; (3) Most of the treated sewage cannot be reused and needs to be transported to sewage treatment plants or centralized treatment stations for further treatment

At present, most of the sewage treatment plants use the explosive gas method, which occupies a large area and requires a large construction investment. It can only meet the three effluent indicators of BOD5, CODcr, and ss.

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