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<p>Maintaining optimal mud properties during drilling operations is essential for achieving efficient drilling performance. While previous studies were mainly focused on long chain polymer; Partially hydrolyzed polyacrylamide, this study investigates the use of short-chain of Partially hydrolyzed polyacrylamide (commercially known as Clay grabber) obtained from service vendor operating in the Northern Region of Pakistan, along with a biopolymer, sodium alginate. Both polymers were added in the water-based mud at three different volumes (5&#xa0;mL, 10&#xa0;mL and 20&#xa0;mL), and parameters including mud weight, pH, and all the rheological characteristics of studied samples were experimentally evaluated. Results indicate that the mud density for Clay grabber samples increased from 1080 to 1150&#xa0;kg/m<sup>3</sup> and from 1150 to 1170&#xa0;kg/m<sup>3</sup> for sodium alginate samples as volume increases from 5 to 20&#xa0;mL. The pH values of all the muds under observation ranged between 8 to 10.5, indicating a basic nature that helps to prevent corrosion. Plastic Viscosity for Clay grabber samples increased from 13 to 20 cP with volume, while sodium alginate demonstrated non-linear behavior ranging between 14 to 18 cP. Moreover, yield point of Clay grabber samples increased substantially from 29&#xa0;lb./100ft<sup>2</sup> to 45&#xa0;lb./100ft<sup>2</sup>, which indicates stronger intermolecular forces and improved cutting transportation capacity compared to sodium alginate samples. Furthermore, all samples under observation exhibited non-Newtonian shear thinning behavior with flow index less than 1. Additionally, the consistency index for Clay grabber samples were all greater than 1, reflecting higher mud thickness and improved hole-cleaning performance. The result clearly indicates that the short chain clay grabber sample was more effective than sodium alginate in improving the characteristics and performance of water-based drilling mud, making it a better choice for maintaining wellbore integrity and improving drilling efficacy.</p>

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Impact of sodium alginate and short-chain PHPA (clay grabber) on the behavior of water-based drilling fluid

  • 期刊论文

  • 发表日期：

    2026年4月29日

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  • Massab Hasnain,
  • Shaine Mohammadali Lalji,
  • Yousuf Bin Arif,
  • Faisal Noor Afridi,
  • Syed Amanullah

摘要

Maintaining optimal mud properties during drilling operations is essential for achieving efficient drilling performance. While previous studies were mainly focused on long chain polymer; Partially hydrolyzed polyacrylamide, this study investigates the use of short-chain of Partially hydrolyzed polyacrylamide (commercially known as Clay grabber) obtained from service vendor operating in the Northern Region of Pakistan, along with a biopolymer, sodium alginate. Both polymers were added in the water-based mud at three different volumes (5 mL, 10 mL and 20 mL), and parameters including mud weight, pH, and all the rheological characteristics of studied samples were experimentally evaluated. Results indicate that the mud density for Clay grabber samples increased from 1080 to 1150 kg/m3 and from 1150 to 1170 kg/m3 for sodium alginate samples as volume increases from 5 to 20 mL. The pH values of all the muds under observation ranged between 8 to 10.5, indicating a basic nature that helps to prevent corrosion. Plastic Viscosity for Clay grabber samples increased from 13 to 20 cP with volume, while sodium alginate demonstrated non-linear behavior ranging between 14 to 18 cP. Moreover, yield point of Clay grabber samples increased substantially from 29 lb./100ft2 to 45 lb./100ft2, which indicates stronger intermolecular forces and improved cutting transportation capacity compared to sodium alginate samples. Furthermore, all samples under observation exhibited non-Newtonian shear thinning behavior with flow index less than 1. Additionally, the consistency index for Clay grabber samples were all greater than 1, reflecting higher mud thickness and improved hole-cleaning performance. The result clearly indicates that the short chain clay grabber sample was more effective than sodium alginate in improving the characteristics and performance of water-based drilling mud, making it a better choice for maintaining wellbore integrity and improving drilling efficacy.