Muds, hydraulics and lost circulation for Slim Hole Drilling - downsized conventional drilling
Muds are a critical part of an optimised slim hole drilling system. The design of the mud for all slim wells must be closely integrated with the hydraulics program, which is in turn closely integrated with the mechanical design of the drilling, evaluation, and completion system. These interfaces are much more complex than with conventional holes.
1 Muds used for downsized conventional drilling
Muds used for downsized conventional drilling are generally conventional. Both water and oil-based muds have been used. In almost all cases polymers (rather . . .