MODELING OF PARAFFIN DEPOSITION IN FLOW OF A GAS-OIL MIXTURE IN TUBES V. Sh. Shagapov and N. G. Musakaev UDC 622.276 The paper presents a scheme of the formation and growth of paraffin deposits on internal walls of the hoisting column of a well with allowance for diffusive transport of the particles of a solid phase to the wall of the hoisting column, for temperature and concentration conditions for these particles (that ensure the formation of a solid phase), and for thermal effects of the paraffin formation. JEPTER74920199915 JEPTER7492015