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Performance of polyethylene and polypropylene beads towards drill cuttings transportation in horizontal wellbore

Zul Hakim, Hadyan and Katende, Allan and Sagala, Farad and Ismail, Issham and Nsamba, Hussein Kisiki (1652) Performance of polyethylene and polypropylene beads towards drill cuttings transportation in horizontal wellbore. Journal of Petroleum Science and Engineering, 165 . pp. 962-969. ISSN 0920-4105

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Official URL: http://dx.doi.org/10.1016/j.petrol.2018.01.075

Abstract

Drilled cuttings removal is critical in drilling operations, especially in horizontal wells. These cuttings are postulated to be among the possible causes of many costly complications, such as mechanical pipe sticking, bore hole instability, drag and torque. This study proposes a new approach that uses polymer beads as a mud additive to improve cutting transportation. In this study, the effect of the concentration of polyethylene (PE) and polypropylene (PP) polymer beads on cuttings transport efficiency (CTE) in water-based mud in a horizontal wellbore was investigated. Experiments were conducted in a lab-scale flow loop equipped with a 13-ft (3.96 m) test section consisting of a concentric annulus acrylic outer casing (2 in. ID) and a static inner PVC drill string (0.79 in. OD). A total of 150 tests were conducted using 10 ppg water based mud (WBM) with 1%–5% by vol. Concentrations of polymer beads (PE and PP) were added at a range of 8–9.5 cp. Six different sizes of drilled cuttings ranging from 0.5 to 4.0 mm were used as samples to determine the CTE at a constant 0.69 m/s average annular fluid velocity. The results revealed that CTE increased with the increase of polymer bead concentrations and that PP is better compared to PE overall due to its low density. The highest CTE was recorded at a 5% concentration of water-based mud polypropylene (WBMPP), which is approximately 96% for cutting sizes of 0.50mm–0.99 mm.

Item Type:Article
Uncontrolled Keywords:Drilled cuttings, Drilling mud
Subjects:T Technology > TP Chemical technology
Divisions:Chemical and Energy Engineering
ID Code:85588
Deposited By: Widya Wahid
Deposited On:30 Jun 2020 16:54
Last Modified:30 Jun 2020 16:54

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