DRILLING FLUID ADDITIVE AND METHOD FOR IMPROVING LUBRICITY OR INCREASING RATE OF PENETRATION IN A DRILLING OPERATION

摘要

The present invention relates to a drilling fluid additive for improvinglubricity or rate of penetration (ROP) ina drilling operation, such as an oil and gas drilling operation. The additivecomprises particles of wax or waxy substance, or amixture of two or more types of said particles having distinct properties,such as particle size, type of wax or waxy substance, meltpoint, solubility, dissolution rate, hardness, shape, blocking ability, or acombination thereof. In certain embodiments, the additiveis environmentally friendly and biodegradable. The invention also relates to adrilling fluid comprising the drilling fluid additiveof the invention. A method of improving lubricity or increasing ROP in adrilling operation is also provided, as well as a use ofparticles of wax or waxy substance or mixture thereof as a drilling fluidadditive for improving lubricity or increasing ROP in adrilling operation.