The Best Pump for Moving Heavy Slurry

Applying a Slurry Pump to Heavier Slurries

When pumping heavy slurries, it is critical to maintain a constant flow through the pipeline. The material must flow at a specific rate based on the type of slurry being pumped. The flow velocity can be measured in feet per second. Consistent movement of the material through the pipeline helps prevent settling at the bottom. Properly applying the pump requires pre-planning and determining the necessary critical flow rate for the heavy slurry being pumped.

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The critical flow rate is defined as the flow rate involving turbulence, which is termed turbulent rather than laminar. In this context, critical flow rate is related to the specific velocity of the fluid that achieves turbulent flow. This turbulence is essential to prevent material from settling in the pipeline. Critical velocity can vary based on the fluid's density and viscosity coefficient. Although determining the critical velocity of a heavy slurry is beyond the scope of this article, it is important to note that the EDDY Pump is designed to produce a turbulent flow due to its unique rotor design. Traditional pumps, such as centrifugal pumps, create laminar flow, which is counterproductive; this is one reason they are not as well suited for heavy slurry applications compared to the EDDY Pump.

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Camdigger said:

So... what kind of rig capability did you build? There are rigs that drill water wells using centrifugal trash pumps. More serious rigs can be equipped with duplex plunger "slush pumps." I don't have specific brands that would mean anything to you, but if you're interested, PM me your address, and I will send you pictures of some rigs—some homemade, others commercially available.

Personally, I would only consider a trash-style pump that can handle sand recycled in the fluid.

Many wells are drilled without shakers, relying only on pits. The most successful operations utilize a two-compartment pit. The return flow is directed into the first compartment, then over a low weir, allowing the pump to draw from the cleaner second pit.

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Hello,

Here is my current project status:
I have completed my prototype. I predict it can drill over 200 ft with the right drill stem. I have a trash pump that will work for a few wells if I use a settling pan. I plan to incorporate a feed trough and a divider for sedimentation. Additionally, I will use bentonite in the mud, which will quickly wear out this type of pump. I considered a dredging pump from AMT and a semi-trash pump from Flowtec. In the end, it seems that the Flowtec with a pressurized grease seal is the best choice. My research shows that Vermeer and Ditch Witch use these on their boring rigs.
Currently, I have a 21 HP gas engine driving a 1.83 CI hydraulic pump. Although the engine is slightly undersized, it will perform well because only one motor draws significant flow at any given time. I have more refinements planned since this is still a prototype. The next version will incorporate all the same concepts but include improvements— such as a 27 HP onboard mud pump driven by a hydraulic motor, a nicer control center, a larger fluid container, and sturdier pillow blocks. I will continue to use 8 HP motors for the drill head and chain hoist.
This unit is portable and can be mounted on various trailers, even the bed of a full-size pickup truck. It weighs about pounds and can fold down. It can accommodate 5 to 7 ft drill stems; if it performs well, I can scale this design up to 20 ft.
The swivel design is a significant question. I fashioned it from scratch, utilizing two sealed ball bearings, DOM tubing in various sizes, large washers, 1.5-inch black pipe, and graphite PTFE packing with grease fittings. It held up well against 100 PSI air.
My drill head features 4-# drill head frame guides, # thrust bearings for lifting and lowering, No 80 drive chain, and more. The lift capacity exceeds #, but I will rate it according to the chain's working strength.
There's much more to discuss, but you get the idea?
More input is welcome.
Gray

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