TITLE:
Elastic Bending Deformation of the Drill Strings in Channels of Curve Wells
AUTHORS:
Nabil Wanas Musa
KEYWORDS:
Curvilinear Drilling, Elastic Bending, Curve Well, Circular Friction, Resistance Forces
JOURNAL NAME:
Modern Mechanical Engineering,
Vol.7 No.1,
February
6,
2017
ABSTRACT: The problem about identification of elastic bending deformation of a drill string in a curve wells based on the theory of flexible curved rods and the direct inverse problems of drill string bending in the channels of curvilinear bore-holes is stated. The problem is solved which determines the resistance forces and moments during performing ascending-descending operations in curvilinear bore-holes with trajectories of the second order curve shapes. The sensitivity of the resistance forces relative to geometric parameters of the bore-hole axial line trajectories is analyzed.