The Preparation and Performances of Self-Dispersed Nanomicron Emulsified Wax Solid Lubricant Ewax for Drilling Fluids

Table 1

Lubricity evaluation of Ewax in different based mud and at different temperature.

Ewax additive dosage/wt%	Based mud	Condition	Δ𝐾𝑓/%	Δ𝑓/%
1.0	Fresh water^a	R.T.	73.5	77.6
		120°C × 16 h	63.8	68.0
1.0	4.0 wt% brine^b	R.T.	76.5	64.1
		120°C × 16 h	78.5	63.1

Remarks: ^afresh water based mud is 5.2% bentonite based mud; ^bbrine based mud is 5.2% bentonite based mud adding 4.0% NaCl.