Article
Energy & Fuels
Jan David Ytrehus, Bjornar Lund, Ali Taghipour, Luca Carazza, Knud Richard Gyland, Arild Saasen
Summary: Results from laboratory experiments on cuttings transport performance using different oil-based drilling fluids with varying viscosities designed for highly deviated wells revealed that the hole cleaning abilities of the fluids significantly vary with well angle, drill string rotation, and flowrate. Low viscous fluids are more efficient at higher flowrates and low drill string rotation, while more viscous fluids are efficient with high drill string rotation rates, which is consistent with field experience. The findings demonstrate the importance of hydraulic design in achieving optimal cuttings transport efficiency in drilling operations.
JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME
(2021)
Article
Energy & Fuels
Camilo Pedrosa, Arild Saasen, Bjornar Lund, Jan David Ytrehus
Summary: The study investigated the efficiency of cuttings transport in different drilling fluids, revealing systematic differences in internal friction behaviors between beds wetted with oil-based and water-based fluids. These findings may help explain the variations in previous studies on cutting transport.
Review
Energy & Fuels
Camilo Pedrosa, Arild Saasen, Jan David Ytrehus
Summary: Over time, operator companies have been researching and applying different hole cleaning techniques to improve cutting removal efficiency. However, there are issues with low efficiency, pipe sticking, and low rate of penetration.
Article
Energy & Fuels
Tong Cao, Kaian Yu, Wenxing Li, Xuyue Chen, Hongwu Zhu
Summary: Badger exploration, a novel oil and gas exploration technology that eliminates the need for fixed rig drilling, allows for considerable time and cost savings and minimizes environmental impact. The development of the internal cuttings removal (ICR) bit provides a new solution for this technology, showing promising experimental results but with significant influence from wet cuttings.
JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME
(2021)
Article
Energy & Fuels
Na Zhu, Wenjun Huang, Deli Gao
Summary: This study investigates the wavy distribution of the cutting layer in an entire wellbore considering a dune mechanism. The improved model considers the buoyancy of cuttings motion in deviated sections and proposes an index to estimate the dynamic cleaning effect. Results demonstrate that the cuttings bed is distributed in waves during pure drilling and washing iterations, with the height decreasing with an increase in R. It is recommended that R should be greater than 0.5 and ideally between 1.2-2.5 to save extra circulations.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Environmental Sciences
Xinglong Chen, Shiqi Mu, Yuanfeng Luo
Summary: This study investigated the use of heat/PMS and heat/PDS processes for treating oil-based drilling cuttings (OBDC) generated during shale gas extraction. The results showed that the oxidant dosage, temperature, and reaction time were positively correlated with the degree of total petroleum hydrocarbon (TPH) removal. The heat/PMS process performed better in removing aromatic hydrocarbons and long-chain alkanes compared to the heat/PDS process.
ENVIRONMENTAL TECHNOLOGY
(2022)
Article
Engineering, Environmental
Yuansi Hu, Xinglong Chen, Shiqi Mu, Qibin Li
Summary: A method was developed using a compound solvent of methanol and n-hexane to effectively extract petroleum pollutants from oil-based drilling cuttings. The compound solvent showed higher efficiency in oil removal and extraction of petroleum pollutants compared to single solvents. Additionally, the use of a compound solvent facilitated the separation and recycling process.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Energy & Fuels
Ahmed Alsaihati, Salaheldin Elkatatny, Ahmed Abdulhamid Mahmoud, Abdulazeez Abdulraheem
Summary: Standard torque and drag modeling programs are widely used in the oil and gas industry, but face accuracy issues, requiring adjustments to match actual conditions. This study aims to develop an intelligent system to predict surface drilling torque, detect operational problems ahead of time, and extend response time limits.
JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME
(2021)
Article
Energy & Fuels
Yaotu Han, Xiaocheng Zhang, Zhengming Xu, Xianzhi Song, Weijie Zhao, Qilong Zhang
Summary: This study employs artificial intelligence models to predict the cuttings bed height in the well-bore. The experiment results show that the ANN model performs the best among other artificial intelligence models.
Article
Energy & Fuels
Abbas Roohi, Rahman Ashena, Gerhard Thonhauser, Thomas Finkbeiner, Laurent Gerbaud, Vamegh Rasouli
Summary: This paper investigates the drilling performance of reaming while drilling (RWD) using a dual-body bit and compares it with conventional drilling. The results show that increasing the distance between the pilot bit and reamer improves the drilling performance.
JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME
(2022)
Article
Geochemistry & Geophysics
Zongyu Lu, Baocheng Wu, Jiangang Shi, Chuanming Xi, Kai Wei
Summary: Cuttings accumulation in horizontal drilling is a major issue affecting drilling performance. This study established a numerical simulation method to investigate the migration characteristics and influencing factors of cuttings in horizontal wells. The research developed an engineering prediction model for cuttings bed height and analyzed the sensitive factors for borehole cleaning. The results showed that drilling speed, cuttings density, and drill pipe eccentricity hinder borehole cleaning, while increasing drilling fluid density, displacement, and drill pipe speed improve borehole cleaning.
Article
Geochemistry & Geophysics
Zongyu Lu, Baocheng Wu, Jiangang Shi, Chuanming Xi, Kai Wei
Summary: This paper establishes a numerical simulation method for cuttings migration characteristics in horizontal wells, revealing the distribution law and migration characteristics of cuttings in horizontal well sections, and fitting an engineering prediction model for cuttings bed height. The analysis shows that increasing drilling fluid density, displacement, and drill pipe speed is conducive to borehole cleaning and reducing the height of cuttings bed. Within the range of normal construction parameters, the error of the horizontal cuttings height prediction model is less than 10%, meeting engineering needs.
Article
Environmental Sciences
Xinglong Chen, Shiqi Mu, Yuanfeng Luo
Summary: In this study, Fe2+-activating hydrogen peroxide (Fe2+/H2O2), peroxymonosulfate (Fe2+/PMS), and peroxydisulfate (Fe2+/PDS) advanced oxidation processes (AOPs) were used to treat oil-based drilling cuttings (OBDC) containing total petroleum hydrocarbon (TPH) pollutants. The TPH removal rate was positively correlated with the oxidant concentration, Fe2+ dosage, and reaction time in all three AOPs within a certain range. The Fe2+/H2O2 process was significantly affected by the initial pH value, while the Fe2+/PMS and Fe2+/PDS processes showed lower TPH removal rates under neutral conditions and tolerated a wider range of pH conditions. The optimal TPH removal rates were 45.04%, 42.75%, and 44.95% for the Fe2+/H2O2, Fe2+/PMS, and Fe2+/PDS processes, respectively. The study also provided insights into the effective degradation of TPH pollutants in OBDC.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Paxton C. Albert, Christopher M. Prosser
Summary: A modeling study was conducted to assess the impacts of drill cutting discharges in the Gulf of Mexico. The study found that cuttings drilled with non-aqueous drilling fluids (NADF) had minimal impact on the local fauna at deep-water well sites. The study also evaluated cumulative seabed deposition and hydrocarbon loading. The results showed that there was no anticipated smothering effect on the benthic community and hydrocarbon deposition was limited.
MARINE POLLUTION BULLETIN
(2023)
Article
Engineering, Environmental
Shiqi Mu, Xinglong Chen, Yuanfeng Luo, Jingjing Zhang
Summary: This study compares three systems for treating oil-based drilling cuttings (OBDCs) and analyzes the effects of oxidant initial concentration, Fe0 dosage, reaction time, and initial pH on the oil removal efficiency. The results show that Fe0/H2O2 and Fe0/PMS systems have better oil removal efficiency under acidic conditions, while the Fe0/PDS system is less affected by pH. Additionally, all three systems are effective in removing straight-chain alkanes, with the Fe0/H2O2 system demonstrating the highest degradation ability. Characterization of OBDCs before and after treatment reveals that Fe0 corrosion and the generation of Fe2+ promote the degradation of petroleum hydrocarbons in OBDCs.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Construction & Building Technology
Herman Camilo Pedrosa, Oscar Mendoza Reales, Victoria Dias Reis, Maria das Dores Paiva, Eduardo Moraes Rego Fairbairn
CEMENT AND CONCRETE RESEARCH
(2020)
Review
Energy & Fuels
Camilo Pedrosa, Arild Saasen, Jan David Ytrehus
Summary: Over time, operator companies have been researching and applying different hole cleaning techniques to improve cutting removal efficiency. However, there are issues with low efficiency, pipe sticking, and low rate of penetration.
Article
Energy & Fuels
Camilo Pedrosa, Arild Saasen, Bjornar Lund, Jan David Ytrehus
Summary: The study investigated the efficiency of cuttings transport in different drilling fluids, revealing systematic differences in internal friction behaviors between beds wetted with oil-based and water-based fluids. These findings may help explain the variations in previous studies on cutting transport.
Article
Energy & Fuels
Camilo Pedrosa, Arild Saasen, Jan David Ytrehus
Summary: The formation of cuttings-beds is a crucial consideration during wellbore drilling operations, especially in highly deviated or horizontal wells. This study analyzes the bonding strength and stress required to break the formed bed of wetted cuttings using granular rheology methodology. The results show that the composition of the interstitial fluid significantly impacts the shear strength of the bed, with water-based drilling fluid exhibiting higher cohesion compared to oil-based drilling fluids.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
Article
Energy & Fuels
Karl Ronny Klungtvedt, Camilo Pedrosa, Arild Saasen
Summary: The filter-cake plays a critical role in reducing the wellbore permeability temporarily to prevent various issues. Its strength measurement is important for optimal drilling fluid design. By using a rheometer, the strength and flowability of filter-cakes were measured, and it was concluded that the addition of cellulose-based fibers can significantly increase the filter-cake strength.
GEOENERGY SCIENCE AND ENGINEERING
(2023)