Halliburton Company

David A Prucha

Leslie N Berryman

Stanley Vernon Stephenson

Max Lynn Phillippi

Herbert John Horinek

Vincent G Reidenbach

Lonnie R Walker

Larry Edwin Guffee

Calvin Lynn Stegemoeller

Robert Baker

Don Roberts

Paul W Heilman

Randall B Cogbill

Leslie R Sears, Iii

Timothy J Dodd

Daryl L Heronemus

Elbert L Shackelford

David E Ripley

A mixing apparatus is provided for mixing slurries, particularly high density, high viscosity fracturing fluid slurries containing a large proportion of proppant material. A mixing tub has a generally round horizontal cross-sectional shape. A relatively large, low-speed rotating agitator is utilized to mix the slurry. The design of the agitator is such that a radially inwardly rolling toroidal shaped slurry flow zone is created adjacent the upper surface of the slurry within the tub. A stream of clean fracturing fluid is introduced into the tub near the center of the toroidal shaped flow zone. Dry proppant material is introduced into the tub and carried by the radially inwardly rolling flow into contact with the clean fracturing fluid. Foraminous baffles, preferably constructed from expanded metal sheets, are radially oriented within the tub to reduce rotational motion of the slurry within the tub without causing dropout of proppant from the slurry. A double suction vertical sump pump is utilized to pump the slurry from the tub.

Slurry mixing apparatus

A mixing apparatus is provided for mixing slurries, particularly high density, high viscosity fracturing fluid slurries containing a large proportion of proppant material. A mixing tub has a generally round horizontal cross-sectional shape. A relatively large, low-speed rotating agitator is utilized to mix the slurry. The design of the agitator is such that a radially inwardly rolling toroidal shaped slurry flow zone is created adjacent the upper surface of the slurry within the tub. A stream of clean fracturing fluid is introduced into the tub near the center of the toroidal shaped flow zone. Dry proppant material is introduced into the tube and carried by the radially inwardly rolling flow into contact with the clean fracturing fluid. Foraminous baffles, preferably constructed from expanded metal sheets, are radially oriented within the tub to reduce rotational motion of the slurry within the tub without causing dropout of proppant from the slurry. A double suction vertical sump pump is utilized to pump the slurry from the tub.

An integrated control system, specifically transportable on water between offshore wells, includes mixing and blending subsystems, a pumping subsystem, a proppant subsystem and a control subsystem for controlling the other subsystems in a unified manner from a common control location.

Integrated blending control system

An integrated blending system comprises a mixing subsystem and a particulate material conveying subsystem which introduce materials into a blender subsystem for producing a blend which is pumped into a well through a pumping subsystem. The subsystems are mounted on a single transportation vehicle at fixed relative positions to each other.

Transportable integrated blending system

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Duncan, OK, United States of America

David A Prucha