Bigfoot Oilfield Services Inc. – Simply, the clearest solution to your solids settling needs.
Bigfoot uses an exclusive, patent pending, solids settling system that achieves clearer results with technology that is simple to operate. The Bigfoot system consists of an effective thickening technology that is not only simple to use, but requires very few high maintenance mechanical components. This combination allows our tank system to operate effectively with only one small centrifuge.
The floc tank comes complete with a polymer hydration unit integrated onto the same skid that allows for the hydration of up to 1 m3 of polymer per batch. This advanced hydration unit is designed to fully hydrate powdered polymers within minutes with very little time required to operate. The hydration system ensures that the flocculating polymers are hydrated, and elongated, effectively which allows them to work more efficiently. Having polymers that are properly activated in combination with a thickening system that can thicken the drilled solids prior to dewatering, can reduce overall polymer consumption by up to 80% from other conventional systems.
The Bigfoot clarification tank is a turnkey system. It consists of its own patent pending integrated clear water transfer pump that can also be equipped with our exclusive patent pending environmental control apparatus, two polymer injection pumps and polymer hydration system. Because of the simplicity and dependability of the Bigfoot system there is no requirement for supplemental components, or support services such as vacuum trucks. These all combined, has allowed Bigfoot to reduce our clients' overall fluid handling costs while clear water drilling by up to 50%.
In addition to reduced polymer consumption, our clients can expect to virtually eliminate the need for a vacuum truck as well as operate the system with one small centrifuge while clear water drilling. In fact, the Bigfoot floc tank can maintain clear water at flow line rates of up to 2.5 m3/min while drilling at high ROP's in the range of 80 - 100 m/hr.
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What is Flocculation
Flocculation is a process where a solute comes out of solution in the form of floc or flakes. The action differs from precipitation in that the solute coming out of solution does so at a concentration generally below its solubility limit in the liquid.
In the earth sciences and oil and gas industries, flocculation is a condition in which clays, polymers or other small charged particles become attached and form a fragile structure, a floc. In dispersed clay slurries, flocculation occurs after mechanical agitation ceases and the dispersed clay platelets spontaneously form flocs because of attractions between negative face charges and positive edge charges.
What are Flocculants
Flocculants, or flocculating agents, are chemicals that promote flocculation by causing colloids and other suspended particles in liquids to aggregate, forming a floc. Flocculants are used in water treatment processes to improve the sedimentation or filterability of small particles.
Many flocculants are multivalent cations such as aluminium, iron, calcium or magnesium. These positively charged molecules interact with negatively charged particles and molecules to reduce the barriers to aggregation. In addition, many of these chemicals, under appropriate pH and other conditions such as temperature and salinity, react with water to form insoluble hydroxides which, upon precipitating, link together to form long chains or meshes, physically trapping small particles into the larger floc.
Long-chain polymer flocculants, such as modified polyacrylamides, are manufactured and sold by the flocculant producing business. These can be supplied in dry or liquid form for use in the flocculation process. The most common liquid polyacrylamide is supplied as an emulsion with 10-40% actives and the rest is a carrier fluid, surfactants and latex. Emulsion polymers require activation to invert the emulsion and allow the electrolyte groups to be exposed.
The following chemicals are used as flocculants:
The following natural products are used as flocculants: