| 摘要 |
A drilling fluid of deviant composition is subjected to a separating process comprising two stages, including a sieving stage and thereafter a pressure filtration stage. The drilling fluid clinging to the sieve residue obtained in the sieving stage is sucked off by means of a partial vacuum. The liquid obtained in the separating stage is used for adjusting the desired composition of the drilling fluid in a supply container thereof, and the solid material separated in the separating process is dried and further processed for recovering the solid material to be used in the drilling fluid. |
