OfiTE 900 - Introduction; Description

Patent No. 6,766,028 - OFI Testing Equipment, Inc.
OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ote.com 2
The Model 900 Viscometer is a portable, yet fully automated system
for measuring uid viscosity. It is designed to be easy to use, easy to
maintain and to provide consistent results. Its simplicity makes it ideally
suited for eld applications. Engineers will appreciate the push button
calibration, its reliability, and the ability to perform standard American
Petroleum Institute (API) recommended practices with one command.
With the addition of a computer, it is able to perform a variety of more
complex laboratory tests. Routine repairs, like bearing and torsion spring
replacement, may be performed by eld personnel with a minimum of
training, without having to return the viscometer for repair. The optional
*KlikLock™ bob uses a magnetic coupling to make removal quick and easy.
The OFITE Model 900 Viscometer is a true Couette coaxial cylinder rotational
viscometer, which employs a transducer to measure the induced angle of
rotation of the bob by a uid sample. The test uid is contained in the annular
space, or shear gap, between the rotor and the bob, which is attached to
a shaft with a biasing spring. The viscous drag exerted by the uid creates
a torque on the bob, and is monitored by the transducer that measures
the angular displacement of the bob. Using the angle of displacement
of the bob, the processor calculates and transmits readable output of
the sample characteristics in accordance with determined calculations
based upon the shear rate and the bob displacement. Revolutionary
improvements in stepper-motor technology by OFITE enables the Model 900
Viscometer to operate accurately at extremely low shear rates (0.01 1/s).
As a stand-alone eld unit, the press of a single button (MUD or CEM)
prompts the viscometer to perform standard API recommended practices for
the technician’s choice of Mud (Plastic Viscosity [“PV”] - Yield Point [“YP”]) or
Cement rheologies. Standard speeds (600, 300, 200, etc.) are provided as
single button operations on the keypad, or if another shear rate is desired, the
parameters may be entered on the numbered keypad. Simply press ENTER
after entering the desired shear rate and the viscometer performs the rest
of the work. It is not necessary to stop the motor between speed changes.
For a fully automated Control/Data Acquisition System suitable for
research applications, the Model 900 Viscometer may be connected
to a computer via a serial (RS-232) port using OFITE’s exclusive
and eld-proven Windows™-based ORCADA
®
software.
*U.S. Patent Number 8,763,776
Introduction
Description