high-efficiency drilling muds with particles u0441u0443u0431u043cu0438u043au0440u043eu043du043du043eu0433u043e size as u0443u0442u044fu0436u0435u043bu0438u0442u0435u043bu044f

摘要

methods and compositions using a drilling fluid comprising u0441u0443u0431u043cu0438u043au0440u043eu043du043du044bu0439 precipitated barite, a weighted average particle diameter below about 1 microns.disclosed methods that include a method comprising a phase which constitute a circulation of drilling fluid in the borehole with a drilling fluid includes: n u0435u0441u0443u0449u0443u044e u0442u0435u043au0443u0447u0443u044e environment and u0443u0442u044fu0436u0435u043bu0438u0442u0435u043bu044c,which includes u0441u0443u0431u043cu0438u043au0440u043eu043du043du044bu0439 precipitated barite, a weighted average particle diameter below about 1 microns. in some versions of the drilling fluid may include a reverse emulsion.in some versions of u0441u0443u0431u043cu0438u043au0440u043eu043du043du044bu0439 precipitated baryte has such a particle size that is at least 10% of particles in u0441u0443u0431u043cu0438u043au0440u043eu043du043du043eu043c besieged ba rita have a diameter below about 0.2 microns.at least 50% of the particles have a diameter in the u0441u0443u0431u043cu0438u043au0440u043eu043du043du043eu043c besieged u0431u0430u0440u0438u0442u0435 below about 0.3 microns and at least 90% of particles in u0441u0443u0431u043cu0438u043au0440u043eu043du043du043eu043c besieged u0431u0430u0440u0438u0442u0435 are u0434u0438u0430u043cu0435u0442 r below about 0.5 microns.