Summary of the effect of solid lubricants on the rheology of drilling fluids.

Lubricant	Rheological properties/compatibility
Slube29	The increase of slube concentration has no obvious effect on PV and YP of drilling fluid
Ewax31	The addition of Ewax has little effect on the AV, PV, and gel of the drilling fluid, but can slightly increase the YP of the system
Starch35	Starch lubricant would cause a significant increase in PV, YP, and gel values of drilling fluid
Novel solid lubricant36	Not mentioned