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.
Highlights
The time of easy oil and natural gas is completed [1] [2]
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 experience gained while drilling vertical wells is not useful for drilling horizontal ones, because mechanical behavior of a drill string (DS) with curvilinear axial line acquires a series of specificities leading to critical situations
Summary
The time of easy oil and natural gas is completed [1] [2]. In as much as the reserves of hydrocarbon fuels in easy-to-extract basins approach to completion, the deposits located at the depths of 10 km become to be promising. In the structural mechanics of curved rods, the methods of theoretical modelling of these phenomena are not developed yet This state of matter is associated with significant complexity of these processes caused by the great length of the drill string (DS) and conditions of contact interaction with the walls of curved holes. In this paper formulated the problems of bending of the boring columns in curved well channels, and the purpose to develop the methods of modelling of the elastic bending of the column in a curved borehole and the study of the type of impact of the outlines of the central line of the well on the value of static parameters of the deformed DS upon descent-ascent operations.
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