Stable Dispersed MoS 2 Nanosheets in Liquid Lubricant with Enhanced Rate of Penetration for Directional Well

MoS 2 nanosheets of approx. 100 nm were synthesized by a reverse microemulsion route firstly, then were annealed under nitrogen atmosphere, and were finally modified with 1-dodecanethiol. The prepared MoS 2 nanosheets were characterized by XRD, TEM, FTIR, and so forth. Experimental results show that MoS 2 nanosheets with the typical layer structure can be easily dispersed in oil lubricant for rate of penetration (ROP) increasing in directional well. The ROP of directional well with the prepared liquid lubricant was 52.9% higher than that of the similar directional wells at least, and the drilling velocity was increased 20% while the total proportion of lubricant in drilling fluid was 1.5%.