Influence of MoS2 Nanosheet Size on Performance of Drilling Mud

Polymers

YoungJu Kim¹  HoWon Jang²  Min-Ju Choi²  SungHyun Hong³  SooYoung Kim³  HaeJin Jo⁴  WookRyol Hwang⁴ 

[1] Korea Institute of Geoscience and Mineral Resources, 905 Yeongilman-daero, Heunghae-eup, Buk-gu, Pohang-si, Gyeongsangbuk-do 37559, Korea;Research Institute of Advanced Materials, Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Korea;School of Chemical Engineering and Materials Science, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Korea;School of Mechanical Engineering, Research Center for Aircraft Parts Technology (ReCAPT), Gyeongsang National University, Jinju 52828, Korea;

关键词: water-based drilling mud;    2D material;    thermal conductivity;    shear thinning;   

DOI  :  10.3390/polym11020321

来源: DOAJ

【 摘 要 】

Water-based drilling mud (WBM) is a non-Newtonian fluid that has a variety of applications such as in transporting cuttings during drilling, protecting the borehole, and cooling the drill bit. With the development of nano-technology, various nanoparticles have been synthesized and have been added to WBM to improve its performance. Shear thinning is the most important factor in drilling mud and this attribute can be improved when two-dimensional particles are added. MoS₂ nanoparticles, which represent a typical two-dimensional material, are easy to synthesize in large quantities and have a high thermal conductivity and low coefficient of friction. Since the two-dimensional structure, thermal conductivity, and low coefficient of friction of MoS₂ would improve the performance of WBM, we experimented with MoS₂ nanosheets as an additive, under optimal conditions, using various samples each with uniform sizes and thicknesses of nanosheets. A large amount of MoS₂ nanosheets was synthesized, sorted by thickness and diameter, and added to drilling mud. The diameter of MoS₂ was divided into a small diameter group (about 100⁻400 nm) and a big diameter group (about 300⁻650 nm), and the thickness was divided into 1⁻2 nm and 5⁻10 nm groups. Experimental results showed that when MoS₂ is added to WBM, shear thinning occurs more strongly. In addition, the addition of MoS₂ with a thickness of 1⁻2 nm and a diameter of 300⁻650 nm resulted in the highest increase in viscosity and thermal conductivity of WBM. As a result, we experimentally confirmed that MoS₂ can be used as an additive to increase the thermal conductivity and viscosity of WBM and to make shear thinning phenomenon more.

【 授权许可】

Unknown