Open AccessNumerical study of drill string uncertainty in acoustic information transmission
Author(s) -
Huimin Xie,
Peifen Zhang,
Jing Zhou
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/734/1/012024
Subject(s) - drill string , transmission (telecommunications) , channel (broadcasting) , drill , bottleneck , drilling , computer science , string (physics) , aperiodic graph , acoustics , structural engineering , engineering , mechanical engineering , telecommunications , physics , mathematics , combinatorics , embedded system , quantum mechanics
Acoustic data transmission in drill string is one of the effective methods to solve the bottleneck of downhole information transmission speed, but its channel characteristics are mainly affected by the structural changes of string. In the process of drilling, the downhole BHA changes constantly according to the well condition, and the shape of drill string changes indefinitely under the condition of wear and force, which leads to the uncertainty of acoustic channel. Through the numerical simulation analysis, we can get the channel changes of drill string in different shapes, and analyze the main factors that affect the information transmission. The size inconsistency of multiple drill strings will lead to the deterioration of the channel characteristics to a certain extent, but the aperiodic drilling tool structure in the channel will cause a significant change in the transmission characteristics.