Controlled discharge proposal and examples

Testing standard and control target

Drilling mud and cuttings: the allowed biotoxicity value in discharged WBFS not lower than 20 000mg／L(GBl8420.1-2001); the oil content in discharged OBFS not higher than 8%, Hg content not higher than 1mg／kg，Cd content not higher than 3mg／kg(GB2914-2008).

Monitor plan

Monitor the biotoxicity and oil content of the drilling mud and drilling cuttings whenever changing the mud system; monitor the COD level in the sanity sewage and the hydrocarbon and biotoxicity of the oily sewage during drilling operation.

Drilling waste collected and transferred to disposal center for dehydration, incineration, biodegradation, re-injection, etc. to meet the environmental requirements.

CRI System

Equipment of CRI System CRI System

Drilling cuttings dehydration system

Remove the water in the cutting

Efficiently recover the base fluids like brine

Improve the solid control performance

Generate clean water for re-use or directly discharge

Reduce the liquid transportation requirements

Can be used to treat all water-based drilling mud system