Overview Library

High-speed, rapid-induction dynamic eductor

The HIRIDE Hopper is an easily installed educator built with a rugged stainless steel frame designed to optimal height for improved ergonomics. The HIRIDE integrates a proprietary Minimum Pressure Drop (MPD) 175 nozzle and unique TriMix Diffuser (TMD). It is available in three configurations: FE, SE and EA.

The HIRIDE Hopper Model 175 FE offers a dynamic positioning design delivering the unique ability to rotate the MPD/TMD eductor assembly up to 180° while utilizing up to 3 in. (76 mm) of vertical travel. This configuration creates unparalleled flexibility for new installs or retrofits on offshore or land rigs.

The proprietary eductor design minimizes pressure loss, provides consistently higher vacuum. The HI_RIDE Hopper requires less energy, maintains a rapid rate of induction and reduces “fish eyes.” The ability to maintain high productivity under consistently low or variable circulating pump pressures makes the HIRIDE Hopper unit the leader in rapid mixing technology.

How It Works

The HIRIDE Hopper unit is an improved means of introducing liquid, powdered or granular additives into drilling, reservoir drill-in or completion fluids on the rig. The mixing hopper facilitates the manual addition of small volumes of material supplied in individual 50- or 100-lb (22- or 44-kg) sacks.

Fluids enter the unit via a 6-in. (152-mm) line, and the MPD nozzle constricts the flow to a 1.75-in. (45-mm) orifice in the nozzle via a downstream, inwardly sloping conical shape. The flow exits the downstream side of the MPD nozzle at high velocity into a void space. The mixing hopper or other flowline opens into this void space via a manual butterfly valve. With the valve open, the high-velocity flow creates a zone of relative low pressure, which creates suction, drawing the material into the void space.

The powdered material drawn into the void space is then carried by the high-velocity flow into the mouth of the TMD diffuser where the geometry promotes turbulence and thus mixing. Flow moves through the throat of the diffuser into a secondary void space, which again changes velocity, creating more turbulence and recirculation zones. The flow then enters the second throat of the TMD and exits into the 6-in. (152-mm) pipe, which again changes the flow velocity creating more recirculation and turbulence and further encouraging mixing. At this stage, all material is effectively entrained in the fluid.

The HIRIDE also includes a 2-in. (51-mm) angled port installed directly below the 4-in. (102-mm) butterfly valve on the inlet to the eductor. This port is used for the addition of liquid products from drum, bulk tank or tanker. Liquids with a viscosity similar to water can be added at a rate of up to 108 GPM (410 L/min). Induction rates will vary depending on the temperature and viscosity of the fluid added.


  • Unique dynamic eductor assembly offers unparalleled 180° of rotation and 3 in. (76 mm) of vertical travel (Model 175 FE)
  • The patent-pending combination Minimum Pressure Drop (MPD) 175 nozzle and TriMix Diffuser (TMD) are made of durable polyurethane
  • 2,790 in.3 (45.7 L) hopper (equal to a 100-lb [45.4-kg] sack of barite)
  • Standard 2-in. (51-mm) bulk-liquids induction port
  • 2-in. (51-mm) cam lock quick connect provides compatibility with bulk tanks
  • Consistent 26.8-in (681-mm) Hg vacuum Lowest comparable pressure loss at 48 psi (3.3 bar)
  • Lowest comparable energy requirement at 0.47 hp/gph (92 kW/m3/hr)
  • 25,992 lb/hr (11,790 kg/hr) rate of solids induction for bentonite


  • Rapid, complete mixing of dry or liquid additives into the fluid system
  • Lowest comparable pressure loss
  • Creates high shear rates in a circulating loop
  • Compact design with small footprint
  • Dust-free dry-product mixing
  • Minimizes “fish eyes” in hard-to-mix products
  • Requires less energy
  • Flexible design eliminates extra equipment
  • Ideal for rigs where space is at a premium
  • A greater degree of worker safety
  • Grooved pipe connections for quick installation and removal
  • Consistent mixing performance between 30 and 60 psi (2 and 4 bar)
  • Durable, weather-resistant, stainless steel construction

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