HISIDE Blender

Overview Library

High-Speed, In-line, Dilution Equipment

The HISIDE Blender is an example of scientific theory and practical engineering combining to create the next evolution of mix-on-the-fly technology. In engineering the HISIDE Blender, M-I SWACO employed Computational Fluid Dynamics (CFD) modeling to design a unit providing accurate and expedience for mixing-on-the-fly operations.

Precise fluid density and rheological control are much extremely important, especially in offshore drilling. Capitalizing on a unique combination of baffle geometry, exhaustive design and static mixers, the HISIDE Blender delivers efficient cut-back of WBM and effective shearing of OBM. It ensures downhole stability, emulsion quality and rapid supply-boat turnaround.

How It Works

The HISIDE Blender design ensures turbulent flow in both the seawater and drilling-mud inlet lines by the use of baffles which are positioned to direct the heavy fluid to commingle with the seawater. As a result, both the seawater and drilling mud enter the 8-in. (203-mm) mixing body and begin mixing immediately, despite the natural tendency for the higher density fluid to channel through the lower-density fluid. The sudden volume change in the primary mixing chamber changes the fluids’ velocity and allows for a longer residence time which promotes further mixing. As the partially mixed fluid exits the 8-in. (203-mm) mixing zone into the 6-in. (152-mm) discharge, recirculation zones are created. Within the 6-in. (152-mm) outlet, these recirculation zones are optimized as the flow encounters each of the static mixers. Aside from mixing, the static mixers have sheared the fluid with calculated shear rates on the order of 4350 s–1, which is significantly higher than competing technologies.

As a result of this design, operators can be confident that a homogenous fluid is discharged from the unit.


  • 4-in. (102-mm) seawater and weighed-mud inlet lines
  • Unique dual, in-line, baffle, pre-mixing zones
  • Exclusive in-line, single or dual static mixers
  • High shear capability up to 4,350 s–1
  • All-steel construction
  • No moving parts
  • Energy-efficient static mixers ensure minimal pressure drop
  • Quick-connect victaulic for inlet lines
  • CFD-modeled, field-tested design


  • Fewer downhole problems
  • Faster turnaround for supply vessels
  • Easy-to-use, trouble-free operation
  • Energy-efficient design requires less power
  • Thorough mixing of mud, brine and chemicals
  • Versatility for lower equipment costs
  • Large-volume inlet and rapid mixing capability remove need for any rig storage and ensure rapid turnaround of supply vessels
  • Consistent mixing performance ensures hole stability and integrity
  • Improvement of hole conditions prior to cementing
  • High flow rates with minimal pressure drop
  • Maximum flow rates up to 1,400 GPM at 60 psi (5,300 L/min at 4 bar)
  • Improved in-line turbulence and multiple recirculation zones
  • Suitability for both WBM and OBM give the HISIDE Blender unit extra flexibility

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