Abstract: | A generalization is presented of the facts concerning the kinematics of interference waves propagating along a well casing and along a column of boring fluid for various models of the well, types of contacts on the boundaries of the cylindrical layers, and elastic parameters of the casing and the surrounding medium.Translated from Zapiski Nauchnykh Seminarov Leningradskogo Otdeleniya Matematicheskogo Instituta im. V. A. Steklova AN SSSR, Vol. 99, pp. 19–27, 1980. |