Innovative Combination of Enhanced Operative Window Provided by High Efficiency Drilling Fluid Technology and Advanced Designed Cutter Bit Set Field Record in Challenging High-Pressure Section
Authors: A. Rivera , Y. Mariscurena , L. Olivella , C. Toro , M. Villalobos , A. Hernandez , R. Maldonado , A. Hernandez 
Published: February 2025

The project aims to highlight the combined benefits of advanced drilling fluid technology and an advanced designed cutter bit in high-pressure drilling scenarios. Objectives include broadening the operative window through enhanced fluid properties for better wellbore stability, boosting drilling efficiency, and rate of penetration (ROP) with the innovative cutter design and setting new performance records. These efforts focus on improving safety, reducing costs, and enhancing operational efficiency, showcasing the practical advantages and potential of this integrated approach.

Comprehensive laboratory tests were conducted on the drilling fluid's rheological properties and simulation of the cutting efficiency of the advanced designed cutter bit under various operational scenarios. Field trial implementation aimed the technology application in a selected high-pressure section. Monitoring and data collection were carried out to evaluate performance metrics, including ROP, nonproductive time (NPT) reduction, and overall drilling efficiency. The analysis and optimization focused on analyzing the collected data to assess the performance and impact of the combined technologies. The recommendations for optimization and further improvements were developed based on the findings.

The field trial of the combined high-efficiency drilling fluid technology and the advanced designed cutter bit surpassed expectations, delivering a significant leap in drilling efficiency. Highlights included a 59% increase in ROP, setting a new benchmark, and a 246 psi increase in the operational window compared to the offset well, achieved without fluid losses, ensuring enhanced wellbore stability. Additionally, the trial conserved over 230 m3 (1,447 bbl) of drilling fluid, offering substantial cost and environmental advantages. This combination proved exceptional for high-pressure drilling, with impressive ROP improvement, and operational window extension signaling major technological progression. The success of the trial demonstrated significant performance enhancements and savings, pointing to wide applicability for future projects, and indicating a step forward in sustainable drilling practices.

The technology merges a high-efficiency drilling fluid system with an innovative advanced designed cutter bit, revolutionizing drilling in high-pressure environments. Unlike traditional bits, the advanced designed cutter optimizes contact with the formation, significantly increasing the ROP and extending bit life through improved cutting efficiency and even stress distribution. This innovation reduces wear and the need for bit replacements in abrasive conditions. The synergy between the advanced cutter design and the specialized drilling fluid enhances performance, setting new benchmarks for drilling efficiency. This integrated approach not only overcomes limitations faced by conventional PDC or roller cone bits in tough drilling scenarios but also achieves cost and environmental benefits by minimizing the use of drilling fluids and reducing waste. By addressing key drilling challenges, this technology elevates operational efficiency and safety, offering a comprehensive solution to the industry's pressing needs.