Abstract:

This paper uses moving coordinate iteration method to analyze the theory of forces and deformations of a large deflection drill string , and makes the optimization computation and poat analysis of bottom-hole assembly (BHA) in Nu MH-1 horizontal well in Degang oil Fi eld by introducing friction into balance computation. The computation results are in agreement with the field BHA, thus indicating all the drilling tools used are more reasonable.

Key words: Moving coodrinate iteration method, Bottom-hole assembly, post analysis