OfiTE HTHP User manual

OFITE HTHP Viscometer
Part No. 130-77
Instruction Manual
Updated 8/22/2019
Ver. 7
OFI Testing Equipment, Inc.
11302 Steeplecrest Dr. · Houston, Texas · 77065 · U.S.A.
Tele: 832.320.7300 · Fax: [phone] · www.ote.com
©Copyright OFITE 2015

OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: [phone] / Fax: [phone] / www.ote.com 1
Intro..................................................................................................2
Components....................................................................................3
Specications .................................................................................5
Setup................................................................................................6
Computer ....................................................................................6
Viscometer ..................................................................................7
Control Panel ..................................................................................8
Operation.........................................................................................9
Software Start ...............................................................................14
Calibration.....................................................................................18
Fluid Manager ...........................................................................22
Software ........................................................................................23
Options......................................................................................23
Save Rate Settings ...................................................................26
Test Builder ...............................................................................27
Select Analysis Outputs..........................................................30
Saved Test Data........................................................................31
Calibration History.....................................................................33
Import/Export.............................................................................34
Starting a Test ...........................................................................35
Maintenance..................................................................................36
Disassembly .................................................................................37
Cell............................................................................................37
Rotor .........................................................................................38
Cell Top .....................................................................................40
Coupling....................................................................................41
Remove/Install ..............................................................................42
Angular Contact Bearing...........................................................42
Pivot Bushing ............................................................................43
Rotor Bushing ...........................................................................44
Torsion Assembly ......................................................................45
Appendix ......................................................................................47
Zeroing the Compass................................................................47
Reinstalling Software ................................................................50
Minimum Required Pressures...................................................51
Conversion Charts ....................................................................52
Test Cell Assembly ...................................................................53
Test Cell Assembly - Exploded..................................................54
Warranty and Return Policy ........................................................55
Table of
Contents

OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: [phone] / Fax: [phone] / www.ote.com 2
When extremely high-temperature and/or high-pressure viscosity
measurements are required, the OFITE HTHP viscometer is the solution. This
fully-automated system accurately determines the rheological properties of
completion uids and drilling uids in terms of shear stress, shear rate, time,
and temperature at pressures up to 30,000 PSI (207 MPa) and temperatures
up to 500°F (260°C). An optional chiller is available for those situations
in which the uid sample needs to be cooled, rather than heated, further
increasing the exibility of the system.
Like OFITE’s other computer-controlled viscometers, the HTHP Viscometer
features our easy-to-use ORCADA®software. Using this exclusive software,
a computer novice can operate the HTHP Viscometer, and yet the system is
versatile enough for advanced research and demanding test parameters.
The HTHP Viscometer uses a compass to detect the rotation of a magnet at
the top of the torsion assembly. The inuence of the powerful drive magnets
inside of the shield, the earth’s magnetic eld, the magnetic properties of the
shield, spring non-linearities, magnetic elds and masses in the laboratory,
non-ideal uid ow, and small geometry variations all combine to make the
angle display non-linear if not compensated. The microprocessor allows for
easy compensation for those effects.
Your HTHP Viscometer has been shipped with everything you need to begin
testing. It includes a computer with all necessary software already installed.
Intro

OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: [phone] / Fax: [phone] / www.ote.com 3
Components #120-00-016-1 Pressure TDR, 50,000 PSI (344.8 MPa)
#120-001 Mineral Oil, 2 Gallons
#120-106 High Pressure Filter
#130-75-71 PC Monitor
#130-76-04 Main Bearing, Qty: 2
#130-76-05 Retaining Ring
#130-76-06 Drive Belt
#130-77-002 O-ring for Cell Assembly, 2" Diameter, Teon, For tests
above 400°F, Qty: 2
#130-77-022 Rupture Disk, 33,000 PSI (227.5 MPa)
#130-77-080 Torsion Spring Module, F1:
#130-77-1 Vee Jewel, Qty: 4
#130-77-2 Cell Assembly:
#130-77-31 Cell Cap
#130-77-32 Cell Body
#130-77-33 Test Cell
#130-77-3 O-ring for Cell Assembly, 1.359" Diameter, Nitrile, Qty: 4
#130-77-4 O-ring for Cell Assembly, 2" Diameter, Viton, Qty: 4
#130-77-5 O-ring for Pressure Ports,   " Diameter, Nitrile, Qty: 8
#130-77-6 O-ring for Outside Cell Assembly, 3" Diameter, Viton, Qty: 4
#130-77-7 Retaining Ring, Stainless Steel, Qty: 3
#130-77-91 Angular Contact Bearing
#130-77-10   " Stainless Steel Ball, Qty: 2
#130-77-11 Shoulder Screw, 10-32 × 0.2495", Qty: 2
#130-77-12 Pivot
#130-77-15 Torque Magnet Assembly
#130-77-20 Rotor Bushing
#130-77-22 Upper Backup Ring, Qty: 3
#130-77-23 Lower Backup Ring, Qty: 3
#130-77-25 Test Stand Assembly
#130-77-28 Drive Magnet
#130-77-36 Port Adapter
#130-77-38 Rotor
#130-77-39 Bob
#130-77-40 Magnet Holder
#130-77-41 Bafe
#130-77-43 Bob Shaft
#130-77-46 Pivot Cap
#130-79-04 DAQ Card for Desktop Computer
#130-79-05 DAQ Cable
#130-79-15 Serial Cable, OB9 M/F
#130-79-42 Transformer, 230 Volt to 115 Volt (For #130-77-230 only)
#132-80 Calibration Fluid, 100 cP, 16 oz, Certied, Qty: 5
#152-37 AC Power Cord, 3-Conductor
#171-84-03 Strap Wrench
#900-1908 Desktop Computer

OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: [phone] / Fax: [phone] / www.ote.com 4
Optional:
#130-77-SP Spare Parts Kit
#130-77-002 O-ring for Cell Assembly, Teon, For tests above 400°F,
Qty: 6
#130-77-080-1 Torsion Spring, F1
#130-77-1 Vee Jewel, Qty: 6
#130-77-10   " Stainless Steel Ball, Qty: 2
#130-77-20 Rotor Bushing, Qty: 6
#130-77-22 Upper Backup Ring, Qty: 4
#130-77-23 Lower Backup Ring, Qty: 4
#130-77-3 O-ring for Cell Assembly, Nitril, Qty: 18
#130-77-4 O-ring for Cell Assembly, Viton, Qty: 24
#130-77-5 O-ring for Pressure Ports, Nitril, Qty: 36
#130-77-6 O-ring for Outside Cell Assembly, Viton, Qty: 12
#130-77-91 Angular Contact Bearing, Qty: 8

OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: [phone] / Fax: [phone] / www.ote.com 5
Specications Instrument Geometry True Couette Coaxial Cylinder
Motor Technology Stepper
Motor Speeds Variable: .01 – 1,000 RPM
Speed Accuracy .001 RPM
Shear Rate Range .01 – 1700 sec-1
Automatic Tests API Cementing and Mud Rheologies
Computer Requirements
DB-9 Serial Port, Windows 2000 or
XP. Recommended screen resolution
1024 × 768 pixels.
Rotor / Bob Specications
Rotor Radius, RR, (cm) 1.8415
Bob Radius, RB, (cm) 1.7245
Bob Height, L, (cm) 3.8
Shear Gap, (cm) 0.117
R Ratio, RB/RR 0.9365
Maximum Shear Stress (Dyne/cm2) 1,680
Minimum Viscosity @600 RPM<a> (cP) 0.5<b>
Maximum Viscosity @0.01 RPM<c> (cP) 10,000,000
Shear Rate Constant, KR, (sec-1 per RPM) 1.7023
<a> Lower viscosities can be measured by the HTHP Viscometer, however one must take into account the effect of bearing drag, Taylor vortices, zero
offset, etc. when looking at the expected accuracy of the reading
<b> For practical purposes the minimum viscosity is limited to 0.5 cP due to Taylor Vortices
<c> Maximum viscosity is based on Maximum Shear Stress and Minimum shear rate (RPM). However, due to practical and physical limitations, it may
be difcult to take these measurements.
There is considerable thermal lag within the test cell. The temperature
sensor sits inside the thermowell in the rotor. The test uid surrounds
the sensor and the heaters surround the test uid. It can take several
minutes for the heat from the heaters to reach the innermost portions of
the rotor. Therefore, the temperature reading in the ORCADA®software
always lags behind the actual temperature of the test uid. Because
of this, OFITE recommends only changing temperatures in large
increments (greater than 50°F or 10°C). Making small adjustments to the
test temperature is unlikely to provide useful results.

OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: [phone] / Fax: [phone] / www.ote.com 6
Setup
Computer
1. Connect the monitor, mouse, and keyboard to the computer and connect
the monitor and computer to an AC power outlet. The computer and
monitor were shipped with the appropriate power cords.
2. Turn the monitor and computer on.
3. Connect the DB-9 cable to the viscometer and the computer COM port 1.
This connection can be found on the right panel of the unit.
4. Connect the 68-pin cable to the viscometer and the computer. On the unit,
this connection can be found next to the DB-9 connection. There will be a
matching connection on the back panel of the computer.
5. Plug the viscometer unit into an AC power outlet and turn it on.
6. Run the ORCADA®software by double-clicking the ORCADA®icon on the
computer desktop.
If this is a fresh install, you will be asked to select a hardware
conguration. Select “Model 77” and click “OK”.
7. From the Main Screen, click the “Utilities” menu and then click “Calibrate
Shear Stress”. To check if a signal is being transmitted from the
unit, simply observe if the value displayed in the “Temperature” eld
corresponds to room temperature.

OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: [phone] / Fax: [phone] / www.ote.com 7
Setup
Viscometer
1. Place the unit on a solid, level surface away from any large motors or
strong magnetic elds.
2. The HTHP Viscometer is designed to test samples at elevated
temperatures and pressures. It requires an air supply of 100 PSI (150 PSI
maximum) to drive the pump and a water source (standard tap water) to
cool the unit and the test sample. The panel on the left-hand side of the
unit has 3 ttings, ¼" (6.35 mm) NPT, for the air supply, water source, and
drain.
The viscometer requires a constant air supply throughout the test.
3. Connect the DB-9 cable to the viscometer and the computer COM port 1.
This connection can be found on the right panel of the unit.
4. Connect the 68-pin cable to the viscometer and the computer. On the unit,
this connection can be found next to the DB-9 connection. There will be a
matching connection on the back panel of the computer.
5. Make sure the viscometer power switch is in the “off” position. Connect
the power cord to the unit and an AC power source.
6. Turn the unit on. The power switch is located on the lower right panel.
Once the unit is turned on, you will immediately hear both fans operating
inside the tower and a beep from the electronics.
Before running a test on the viscometer, you must zero the compass
and then run a calibration procedure. For detailed instructions, see
page 18 for calibrating the unit and page 47 for zeroing the
compass.
Transducer Housing
Tower
Pressure Release
Valve
Test Cell
Data Acquisition
Cable
Serial Communication
Cable
Viewing Ports (Oil Level)

OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: [phone] / Fax: [phone] / www.ote.com 8
Control Panel During a test, the computer will be continuously adjusting the pressure inside
the cell. As the pressure increases due to thermal expansion, the computer
will allow pressure to bleed. Likewise, if pressure begins to drop, the
computer will add pressure to keep it within the target range.
The Regulator on the control panel controls the air pressure into the pump.
This should be set between 100 – 150 PSI (690 – 1,034 kPa) as indicated on
the Air Pressure gauge.
Throttle Valve (Inside) - This valve gives you tighter control over the
pressure going into the pump. Use this valve to ne-tune the pressure control
system. To access this valve, remove the panel directly to the left of the
control panel.
When operating at the lower end of the pressure range (less than 10,000
PSI /68.95 MPa), a single cycle of the pump could add far too much pressure
to the cell. If this is the case, the throttle valve should be closed slightly.
This will reduce the pressure to the pump, which will reduce the amount of
pressure added to the cell in each pump cycle.
When operating at the higher end of the pressure range (above 10,000 PSI
/ 68.95 MPa), a single cycle may not be enough to add pressure to the cell.
In this case, open the regulator slightly to increase the air supply to the pump
and increase the pressure added to the cell in each pump cycle.

OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: [phone] / Fax: [phone] / www.ote.com 9
Operation 1. Remove the entire test cell from the heating well and place it in the
preparation stand.
2. Remove the cell and the cell cap from the coupling.
3. Place a small amount of high-temperature thread lubricant (#165-44) on
all of the threads on the entire cell assembly. This includes the bottom
threads for the test cell, the top threads for the cell cap, the threads on the
three ports, the threads on the bob and bob shaft, and the threads on the
screws holding the torsion spring module to the cell coupling.
4. Place an o-ring (#130-77-4) into the o-ring groove inside the cell, just
above the rotor.
Carefully inspect all o-rings before use. Replace any that show signs
of damage or wear. O-rings are most likely to be damaged after tests
above 400°F (204°C).
5. Place the metal cell backup ring (#130-77-23) on top of the o-ring with the
at surface facing up.
The backup ring is designed to prevent o-ring extrusion. Extrusion
could cause the seal to fail or complicate the opening of the cell
after a test. The backup ring is easily damaged and must be handled
carefully to avoid bending it.
6. If the rotor is not already in the cell, carefully lower it in with the magnet
end at the bottom.
The easiest way to hold the rotor is to insert two ngers inside and apply
pressure outward. Do not let it drop.
Test Cell on
Preparation Stand O-ring Groove