Composite drilling wall protecting mud soil for coal series strata

Abstract

The invention discloses composite drilling wall protecting mud soil for coal series strata. The composite drilling wall protecting mud soil comprises composite modified bentonite, kaolin, bauxite, carboxymethyl cellulose, potassium humate, sulfomethyl sodium humate, SM vegetable gum and graphite powder, wherein the composite modified bentonite, kaolin and bauxite are matched with one another to form a main component A of the mud soil, and any one or more of the carboxymethyl cellulose, potassium humate and sulfomethyl sodium humate are mutually matched to form a synergist B of the mud soil. The composite drilling wall protecting mud soil for coal series strata can effectively maintain the stability of mud in the coal series strata, maintain various important indexes such as water loss, sand content and viscosity value, inhibit the hydration dispersion of water-sensitive strata, thereby better preventing the occurrence of drilling hole shrinkage or burying accidents, simultaneously reducing the abrasion of machinery, prolonging the service life of machinery, reducing the engineering cost and reducing the influence on the environment.

Description

technical field [0001] The invention relates to the technical field of drilling mud processing, and in particular relates to a composite type drilling mud retaining wall mud soil for coal-measure strata. Background technique [0002] Mud is especially important in drilling engineering, among which drilling retaining wall slurry is an important foundation construction material in projects such as underground diaphragm wall formation and bored pile drilling. The static pressure of mud on the groove wall and the formation of mud on the groove wall The mud skin can effectively prevent the wall of the groove and hole from collapsing. At the same time, the mud also has the functions of carrying slag and cooling and lubricating the machine tools. The mud with a certain viscosity can be discharged together with the mud slag. At the same time as the machine tool, it can also cool the machine tool. However, it is very difficult to drill in the coal-bearing strata. The geological compo...

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Problems solved by technology

[0003] The present invention aims at providing a high-efficiency coal-measure strata composite drilling wall mud soil problem in view of the current domestic drilling wall protection slurry with high technical difficulty and high construction cost restricting the development of the industry.