Decanting centrifuges in solids removal

XI'AN, China - Sept. 27, 2016 - PRLog -- Decanter centrifuge for solids removal

A decanting centrifuge is a tool used in viscosity control and it is also solids-removal equipment. It is a machine with an internal cylinder, or bowl, that rotates at high speeds (1800 rpm). As drilling fluid is pumped into and conveyed through the rotating bowl, it is subjected to a large centrifugal force that increases the separation or settling rate of the suspended solids. The higher-mass particles separate fastest along the wall of the rotating bowl.

An important distinction is that while screens and hydrocyclones are used to separate and discard larger drilled-solids particles, centrifuges are used to separate and discard smaller, ultra-fine particles, both drilled solids and barite.

Why use a centrifuge?

Short answer: To remove drilled solids.

During drilling operations, drilled solids accumulate and degrade in size, which causes viscosities and gel strengths to increase, especially in weighted drilling fluids. These fluids necessarily contain concentrations of weight material solids. A centrifuge will separate ultra-fine (less than 2 microns barite and 3 microns drilled solids) from larger, desirable-size barite particles and drilled solids, which, while undesirable, are not as harmful to fluid flow and wall building properties.

http://www.aipusolidcontrol.com/html/products/centrifuge....

Expensive treatment additives are also discarded with the ultra-fines stream. However, most chemical treatment expense is directed to combat actions of ultra-fine drilled solids. While some additions will be necessary, the ultimate result is lessened additive and barite usage, and the removal of drilled solids will be beneficial.

Decanting centrifuge operating reminders

1. Before startup, rotate bowl or cylinder by hand to make sure it rotates freely.

2. Start centrifuge first, before starting the drilling-fluid feed pump or dilution water.

3. Set drilling-fluid mud and dilution rates according to manufacturer's recommendations, which usually vary according to mud weight.

4. Shutdown:

. Turn off drilling fluid feed . Turn off dilution water

. Turn off machine.

Please feel free to ask us any question if you have. For decanting centrifuge in solids removal we know better.