{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,8]],"date-time":"2026-01-08T01:53:09Z","timestamp":1767837189273,"version":"3.49.0"},"reference-count":0,"publisher":"Latvia University of Life Sciences and Technologies, Faculty of Engineering and Information Technologies","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2025,5,21]]},"abstract":"<jats:p>Accurately measuring drilling fluid rheological properties is fundamental for optimizing hydraulic efficiency, ensuring wellbore stability, and minimizing drilling risks. Traditional methods for assessing these properties often encounter significant limitations, including measurement inaccuracies in non-Newtonian fluids, sensitivity to environmental conditions, and inadequate adaptability to diverse fluid compositions. This study presents a simplified analytical approach for estimating the rheological properties of non-Newtonian drilling fluids using the Marsh funnel discharge time. The method is based on the Ostwald-de Waele power-law model combined with a modified hydraulic equation. To evaluate the approach, two fluids were considered: a Newtonian fluid with a discharge time of 26 seconds and a bentonite-based non-Newtonian fluid with a discharge time of 38 seconds. The model calibration for the non-Newtonian fluid was performed using a known discharge volume and the measured flow time. The resulting flow curve parameters include a consistency coefficient of 2.7 Pa\u00b7s\u207f and a flow behaviour index of 0.55. The estimated shear stress values were 34.5 Pa and 47.8 Pa at shear rates of 511 s-1 and 1022 s-1, respectively. The plastic viscosity was 0.026 Pa\u00b7s, and the estimated yield point was 21.2 Pa. The proposed model provides a basic framework for interpreting funnel test results without the need for complex laboratory equipment. The method serves as a practical tool for preliminary field assessments or integration into automated data processing systems. A comparison of apparent viscosity versus shear rate further illustrates the deviation of the non-Newtonian fluid from Newtonian behaviour, supporting the choice of rheological model.    <\/jats:p>","DOI":"10.22616\/erdev.2025.24.tf107","type":"proceedings-article","created":{"date-parts":[[2025,5,30]],"date-time":"2025-05-30T11:42:07Z","timestamp":1748605327000},"source":"Crossref","is-referenced-by-count":1,"title":["Improved technique for measuring rheological properties of drilling fluid"],"prefix":"10.22616","volume":"24","author":[{"given":"Volodymyr","family":"Khomenko","sequence":"first","affiliation":[{"name":"Dnipro University of Technology, Ukraine"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Samal","family":"Muratova","sequence":"additional","affiliation":[{"name":"Satbayev University, Kazakhstan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zamanbek","family":"Utepov","sequence":"additional","affiliation":[{"name":"Caspian University of Technology and Engineering named after Sh. Yessenov, Kazakhstan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Arailym","family":"Zhanggirkhanova","sequence":"additional","affiliation":[{"name":"Dnipro University of Technology, Ukraine"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"9905","published-online":{"date-parts":[[2025,5,21]]},"event":{"name":"24th International Scientific Conference Engineering for Rural Development","acronym":"ERDev2025"},"container-title":["Engineering for Rural Development","24th International Scientific Conference Engineering for Rural Development Proceedings"],"original-title":[],"link":[{"URL":"https:\/\/www.iitf.lbtu.lv\/conference\/proceedings2025\/Papers\/TF107.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,5,30]],"date-time":"2025-05-30T12:06:00Z","timestamp":1748606760000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.iitf.lbtu.lv\/conference\/proceedings2025\/Papers\/TF107.pdf"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,5,21]]},"references-count":0,"URL":"https:\/\/doi.org\/10.22616\/erdev.2025.24.tf107","relation":{},"ISSN":["1691-5976"],"issn-type":[{"value":"1691-5976","type":"print"}],"subject":[],"published":{"date-parts":[[2025,5,21]]}}}