08.2021.232.240

Drilling and Casing Pipes Corrosion Investigation in Water Based Drilling Mud of Iraqi Oil Fields Environment

Author(s):

Khalid Abdulhussain Mohammed *, Abdullah K. Okab, Hazim S. Hamad , Mustafa Hashim‡‡, Rand  K. Abdulhussain‡‡‡

Affiliation(s):

Petroleum and gas engineering department, University of Thi-Qar, Thiqar, Iraq

Midland Refineries Company, Ministry of Oil, Iraq

‡‡ Vysus Group company, Aberdeen, UK

‡‡‡ University of Huddersfield, UK

Corresponding Author Email: dr.khalid@utq.edu.iq

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

The integrity of drilling and casing pipes under high-pressure and temperature conditions is a vital issue for oil or gas wells through the lifecycle of a well. Corrosion is a major challenge in the oil and gas industry in particular under high pressure and high-temperature conditions, it adds extra costs for maintenance of the drilling and production facilities, safety, and environmental damages. In this study, the effective corrosion parameters of AISI 1020 and AISI 1080 carbon steel in water-based mud under flowing conditions were examined. A new apparatus was designed and manufactured to allow the investigation of corrosion in AISI 1020 and AISI 1080 carbon steel. The Experiments were conducted in a reservoir-like environment over a wide range of parameters including temperature, pressure and chemistry of the drilling mud under dynamic conditions. The results showed that the increase in temperature, pressure and rotational speed significantly increases the corrosion rate for both types of pipes. The findings also depicted that AISI 1020 carbon steel has higher corrosion rates compared to AISI 1080 carbon steel. In addition, the developed apparatus can be used to simulate other complicated conditions in an environment similar to field experience and to improve the quality of the experimental data.