A method of preventing STRAIN casing in the range PLASTIC ROCKS

摘要

method u043fu0440u0435u0434u0443u043fu0440u0435u0436u0434u0435u043du0438u00a0 casing deformation of columns in the interval plastic rocks, including drilling and fastening both wells in the u0441u043eu043bu0435u043du043eu0441u043du044bu0445 u043eu0442u043bu043eu0436u0435u043du0438u00a0u0445, oh u0442u043bu0438u0447u0430u044eu0449u0438u0439u0441u00a0, increases the loading capacity of the casing string by setting the cement bridge in the casing string in the borehole in the u0446u0435u043cu0435u043du0442u0438u0440u043eu0432u0430u043du0438u00a0 u0440u0432u0430u043bu0435 turnover of salt, u0432u044bu00a0u0432u043bu0435u043du043du043eu043c known wayand u0432u0440u0435u043cu00a0 u0434u043eu0441u0442u0438u0436u0435u043du0438u00a0 maximum relaxation u043du0430u043fu0440u00a0u0436u0435u043du0438u0439, which u0441u043eu0441u0442u0430u0432u043bu00a0u0435u0442 14 days, u043eu043fu0440u0435u0434u0435u043bu00a0u044eu0442 of u0432u044bu0440u0430u0436u0435u043du0438;u (t) = Umax [1 - exp (- t)];where Umax - the maximum displacement of the walls of the borehole, mm;;the back u043fu0440u043eu043fu043eu0440u0446u0438u043eu043du0430u043bu044cu043du0430u00a0 time during which is the maximum displacement of the walls of the wells, day 1;;t - current u0432u0440u0435u043cu00a0, soot.