Force and Influencing Factors Analysis for Bottomhole Assembly with Two Stabilizers and One Bend

Wanlong Huang,Qiang Wang,Yishan Lou,Yan Chen,Haimin Xu

doi:10.19026/rjaset.6.3595

Abstract

The aim of this study is to research the force and influencing factors for bottomhole assembly with two stabilizers and one bend. Borehole trajectory control is one of the basic problems in drilling engineering and it is generally paid attention at home and abroad. Experts and scholars at home and abroad have done a lot of research in the drill string mechanics (especially the force and deformation analysis of BHA), interaction of bit and formation, borehole trajectory prediction method. They have obtained many achievements in scientific research, so as to make the hole trajectory control theory and technology constantly develop.

Highlights

At the beginning of 50s, Lubinski using classical differential equation method to analyze BHA mechanical properties of vertical section (Lubinski, 1950)
Call as has analyzed the BHA based on the "balance curvature method" to quantitatively predict the bore hole trajectory. They put forward bit bending moment theory to express the influence of formation on the deviation. He HuaShan has set up the drill string 3D static large deformation control equation for the first time and use the finite difference method to get its numerical solution
1, 2 were nearly bit stabilizer and upper stabilizer, L1 is the distance from bit to nearly bit stabilizer, L2 is distance the diatance from nearly bit stabilizer to structure corner, L3 is the distance from structure corner to the upper stabilizer

Summary

INTRODUCTION

At the beginning of 50s, Lubinski using classical differential equation method to analyze BHA mechanical properties of vertical section (Lubinski, 1950). Call as has analyzed the BHA based on the "balance curvature method" to quantitatively predict the bore hole trajectory They put forward bit bending moment theory to express the influence of formation on the deviation. He HuaShan has set up the drill string 3D static large deformation control equation for the first time and use the finite difference method to get its numerical solution. He founded the vector model for the interaction of bit and formation. The objective of this study is to analyze the force and influencing factors for bottom hole assembly with two stabilizers and one bend

BHA CONTROL EQUATIONS

AND ONE BEND

CONCLUSION