Development of Technology for Hydromechanical Breakdown of Mud Plugs and Improvement of Well Cleaning by Controlled Buckling of the Drill String

The article provides brief information about a non-standard experimental setup developed in the laboratory of St. Petersburg Mining University Well Drilling Department. technique presented makes it possible to simulate well cleaning process cuttings by incorporating variation parameters (the zenith angle well, volume flow and rheological properties agent, rotation frequency, number length drill string half-waves) that cause buckling. For first time, positive side (DS) buckling phenomenon is considered. A hydro-mechanical effect on mud plugs improved were revealed. results study confirm an intense difficulty transporting surface at critical 55°. Regularities have been established making determine DS cutting-carrying capacity when drilling deviated extended reach wells. It proposed use hydromechanical impact accumulated artificially controlling resulting order destroy plug increase efficiency without specialized devices. conceptual solution aimed implementing method for destruction plugs—the pipes equipped with quasi-distributed differential measuring system strain gauges based fiber-optic Bragg grating—is presented.