


Manufacturing & Processing Machinery - Article expired
网页In geotechnical engineering, drilling fluid, also called drilling mud, is used to aid the drilling of boreholes into the earth. Often used while drilling oil and natural gas wells and on exploration drilling rigs, drilling fluids are also used for much simpler boreholes, such as water wells.One of the functions of drilling mud is to carry cuttings out of the hole.网页"Iranian authorities are trying to silence a critical moment in the country's history, and in the process have made Iran among the world's top jailers of journalists in an astonishingly short time," said CPJ President Jodie Ginsberg. At least 21 of those journalists have since been released on bail.
