MEX-BLOCK OB is a double-action reversible invert emulsion drilling fluid designed for completion of wells in hydrophilic conditions, and for safe well killing. The system may be mixed with any oil base, including diesel fuel; it is designed for well completion in open hole conditions, and for wells requiring prompt removal of mud cake from borehole for continuous production. MEX-BLOCK OB is able to convert hydrophobic conditions into hydrophilic conditions through pH adjustment.


  • in injection wells

MEX-BLOCK ОВ system is used to rectify implications related to any fluid losses when conducting workover in high-permeable and porous reservoirs by means of smooth gradual well killing