DEVELOPMENT AND ITS APPLICATION OF A DRILLING FLUID LUBRICANT-RF

A new drilling fluid lubricant, namely RF is developed for using in the heavy weight mud in Daqing Oilfield. It incorporates the using of active element to improve its absorption on drill pipe surface, and raising the molecular weight to a suitable level. Measurement with the Extra Pressure (EP) Lubrication Tester shows that it can hold the lubrication factor of drilling fluid under 0.15 in the density range of 1.03~1.7g/cm3, and it does no harm on drilling fluid performance in conventional systems. It uses the vegetable oil byproducts and its derivatives as raw material; this reduces the cost and is environmentally safe. Its additional advantages are longer service span and higher efficiency. Field usage in 2 horizontal wells and 62 slim holes in Daqing Oilfield are successful.