Innovative technologies in dispersion of drilling washing liquids for drilling and development of oil and gas wells

Abstract

The article presents the results of comprehensive studies of the effect of wave technologies on the physico-mechanical properties of finely dispersed montmorillonite suspensions and supersaturated salt solutions in laboratory and field conditions. It is shown that because of wave processing by flow hydrodynamic vortex-type generators with tangential and radial channels and flat-type generators with cylindrical flow bodies, the dynamic shear stress of clay solutions has increased significantly, the number of solution particles with a size of 1-2 microns has increased 2.5 times. This means that the wave treatment of the clay suspension leads to an increase in the colloidal fraction, and, consequently, to an increase in the quality of the suspension, to a decrease in the consumption of clay powder, as well as to a several-fold reduction in the preparation time compared to traditional technology. As a result of wave treatment of supersaturated salt solutions, the degree of dispersion also increased significantly: the size of salt particles in the su-persaturated solution is from 120 microns when using a conventional mechanical stirrer, and after treatment with a wave generator is 1-6 microns. It is shown that the main contribution to the achievement of high efficiency of wave processing is made by nonlinear wave and cavitation processes occurring in the flow part of hydrodynamic generators.