Research of Downhole Instructions Decoding with Variable Drilling Fluid Displacement

DOI

10.2991/eia-17.2017.69How to use a DOI?

Keywords

drilling fluid displacemenet; downlink communication; STM32 chip; instruction decoding

Abstract

This paper studies a downlink communication mode in which the effective downhole control instruction was generated by the use of drilling fluid pump displacement to format three descending and three ascending pulse instruction encoding. The principle of the downlink communication was introduced. The encoding idea of the downlink instruction code with 5-bit pulse was described. This downlink code is used to compose the corresponding control instruction which includes the information of the tool face angle and the guide force percentage. The downhole pulse widths were recognized by using STM32 as a micro control chip. The corresponding control commands were identified through the development of the software in the downhole drilling tool. Laboratory ground experiments demonstrated the feasibility of this downlink transmission mode by using variable drilling fluid displacement and the achievability of instruction decoding software.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Aiqing HUO
AU  - Shaohui LI
AU  - Wei HE
AU  - Ke SUN
PY  - 2017/07
DA  - 2017/07
TI  - Research of Downhole Instructions Decoding with Variable Drilling Fluid Displacement
BT  - Proceedings of the 2017 International Conference on Electronic Industry and Automation (EIA 2017)
PB  - Atlantis Press
SP  - 322
EP  - 325
SN  - 1951-6851
UR  - https://doi.org/10.2991/eia-17.2017.69
DO  - 10.2991/eia-17.2017.69
ID  - HUO2017/07
ER  -