Abstract: The effect of tool joints on the passage of plane longitudinal and torsional waves along a drill pipe was studied. An approximate solution to the governing equations of motion was found, and ...

Abstract: Part 1: No reverse curvature. Part 1 of this paper considers the bending stresses induced in the unsupported length of pipe as it feeds off of the supporting stinger with no change in sign ...

Abstract: The essential difficulty in this radially symmetric problem arises from the geometry involving intersecting cylindrical and plane boundaries. The problem may be reduced by integral transformation ...

Abstract: An equation of motion for a drill string, considering elastic, dynamic, and drag forces, was derived in a previous paper and was applied to two types of beam behavior: A beam having constant ...

Abstract: An equation of motion for a drill string, considering elastic, dynamic, and drag forces, is derived. This equation is then applied to two types of drill-string behavior; i.e., a beam having ...