Gypsum/ Polymer Mud

Surface sections can be drilled with a gypsum/polymer water based mud. Attention must be paid to preserving the inhibitive properties of the drilling fluid by maintaining appropriate polymer and…

Bentonite Mud

Bentonite based mud may be used to impart stability to boreholes through soft seabed sediments prior to running structural or conductor casing. 30-40ppb bentonite mud shall be used offshore to sweep…

Gel/Polymer Mud

Although gel/polymer muds are normally prepared as fresh water drilling fluid systems, existing bentonite spud mud or native clay mud may be converted simply by diluting the systems and adding the …

NaCl Polymer CaCO3 Mud

Reservoir sections can be drilled with a low colloidal content sodium chloride/polymer mud system weighted with calcium carbonate. The recommended formulation is to minimise formation in a sandstone…

Sea Water/ Flocculated Bentonite Slugs Mud

Sea Water/ Bentonite is a simple mud system for top hole drilling. Viscous bentonite slugs pumped regularly for good hole cleaning. Returns are not be taken to surface during conductor pipe cleaning/…

Non Damaging Polymer Mud

This mud system is used to drill the reservoir section in onshore and offshore wells.  It is a sodium chloride based system, which gives inhibitions with minimal formation damage. It is…

Low Solids Non Dispersed Mud

These mud systems are used both onshore and offshore to drill the 12.1/4in hole.  This type of mud is run without the use of thinners, provided the solids content (less gravity solids) of the mud …