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MAX-FLOW

DESCRIPTION

MAX-FLOW system is a special drilling fluid used to drill in the productive intervals and pay zones. The system was designed under specific requirements applied to the primary well drilling operations, which exclude the use of any products and components contaminating production formations, such as barite, bentonite, acrylic polymers, etc. Polysaccharides easily degrade in the bottom-hole conditions, either naturally, or during any near well-bore treatments. The system is easy to mix and to condition in the field, it does not require any special processing equipment.  The composition of the system can be optimized dependent on the drilling conditions and formation properties; it may include different bridging materials, salts and inhibitors.

APPLICATION

The MAX-FLOW system is optimal:

  • to drill horizontal wells and to complete wells without cementing;
  • for horizontal sidetracking;
  • to drill exploration wells and to take core samples, when it is necessary to provide minimal filtration and to maintain natural permeability;
  • to mix composite fluids for well perforation, workover and well service operations (such complex compositions may reduce any possible kill fluid losses and prevent contamination of the productive intervals).

SPECIAL FEATURES AND ADVANTAGES

The important characteristic of the MAX-FLOW system is the combination of specially blended polymers. The components of the system exhibits optimal rheological properties, including LSRV – low shear rate viscosity (at stops of circulation and with flow in the annulus), and minimal viscosity at high shear rates (flow inside the drill string and through the BHA). The unique rheological properties of the system allow avoiding high pressure values during drilling, and provide efficient cleaning of borehole from cuttings. This advantage is especially critical when drilling horizontal sections with small diameters.

Calcium carbonate with defined particle size distribution may be used to form a thin mud filter cake without clay. The availability of several grades of calcium carbonate will allow to optimize the composition of the mud with respect to specific formation properties, in order to provide an minimum filtrate invasion and to quickly form a thin mud cake. A mud engineer is additionally able to adjust the ratio of the colloidal solid phase particles versus calcium carbonate content to maintain appropriate filter cake properties.

The density of the system and its inhibition properties are regulated through the use of different salts and liquid inhibitors. Sodium chloride, potassium chloride, and other salts may be used as a base for drilling mud systems. When low density systems are required to drill through the low pressure intervals, the system can be mixed and maintained without the use of any salts, and with several types of drilling mud inhibitors instead.

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MAX-FLOW