Perfection of technology of deep wells safe construction on the basis of optimization of drilling bottomhole parameters
After studying home and foreign experience relating to application of methodology of technological risks control while constructing deep oil and gas wells, the authors of the present paper developed requirements aimed at perfecting technology of safe construction of deep wells. The data obtained during the research work, carried out during construction of deep oil and gas wells, witness the fact that collapse and caving of well walls, unstable behavior of plastic clays, dragging force, landing of the string, tools sticking, gas and oil showings, circulation losses appear the most popular types of complications. Classification of geological section and probability of appearance of complications and prior-to-accident situations, developed in accordance with the results of experimental researches carried out with the authors’ participation, is presented.