OfiTE 120-57 User manual
Gas Migration Tester
#120-57 - 115 Volt
#120-57-1 - 230 Volt
Instruction Manual
Updated 3/25/2020
Ver. 3
OFI Testing Equipment, Inc.
11302 Steeplecrest Dr. · Houston, Texas · 77065 · U.S.A.
Tele: 832.320.7300 · Fax: 713.880.9886 · www.ote.com
©Copyright OFITE 2015
OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ote.com 1
Introduction.....................................................................................2
Description......................................................................................2
Specications .................................................................................3
Components ...................................................................................4
Installation.......................................................................................6
Setup................................................................................................7
Software ..........................................................................................9
Setup...........................................................................................9
Operation ..................................................................................10
Calibration................................................................................. 11
Assembly ......................................................................................14
Setup.........................................................................................14
Test Cell ....................................................................................15
Installing the Test Cell ...............................................................20
Testing ...........................................................................................22
Starting the Test ........................................................................22
Completing the Test ..................................................................23
Removing Cement from the Cell...............................................26
Cell Diagram .............................................................................27
Warranty and Return Policy ........................................................28
Table of
Contents
OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ote.com 2
The problems of gas migration after cementing operations have been well
documented. The costs associated with these problems, as well as stricter
environmental regulations, have forced gas well operators to look for
methods to minimize gas migration.
The OFITE Gas Migration Tester helps predict and overcome the potential
for gas migration after cementing. This unit evaluates both the potential and
severity of gas migration at downhole conditions with the recommended
slurry. This allows for the design of the most economical and reliable cement
slurry for a particular well.
A test cell is lled with a cement slurry and placed into a heating jacket. The
test cell is tted with a piston above the slurry and a screen below. A back
pressure regulator below the test cell applies back ow pressure. Hydrostatic
pressure is applied to the piston and nitrogen/gas pressure is applied through
the piston tubing and onto the cement slurry. As the slurry hardens, if the
cement is sufciently permeable, the nitrogen pressure will force the gas
through the back pressure regulator to be collected and measured. Both
ltrate and gas volume are collected.
Introduction
Description
Inlet Cap
Cell
Piston
Screen
Cement
Cement
N2Gas - 500 PSI
(3,447.5 kPa)
To Computer
Pressure Transducer
Hydrostatic / Overburden
Pressure 1,000 PSI
(6,895 kPa)
To Computer
Pore Pressure Transducer
Back Pressure
300 PSI (2,068.5 kPa)
Back Pressure Regulator
Filtrate
OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ote.com 3
Specications - Maximum Temperature: 400°F (204.4°C)
- Maximum Pressure: 2,000 PSI (13,790 kPa)
- Crated Size: 43" × 36" × 48" inches (109.2 × 91.4 × 121.9 cm)
- Crated Weight: 469 lb (212.7 kg)
- Voltage: 115 / 220 Volts
- Requires 1,000 PSI (6,895 kPa) Nitrogen Supply
OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ote.com 4
Components #120-57-07 Pressure Sensor, 0 - 2,500 PSI (0 - 17,350 kPa)
#130-76-03 Thermocouple, Qty: 2
#153-67 Syringe, Disposable, 60 cc, Qty: 4
#154-63 Spatula, Micro Spoon, 9" Flat Handle
#165-14-8 Thermocouple, Type “J”, ⅛" × 6"
#170-17 O-ring for Valve Stem
#170-18 Removable Cement Screen, 325 Mesh with 60 Mesh Backup
Optional:
#120-57-SP Spare Parts for #120-57:
#120-57-01 Screen, 325 Mesh, Qty: 20
#120-57-02 Screen, 60 Mesh, Qty: 10
#120-57-03 Piston Seal, Qty: 6
#120-57-04 O-ring for Screen, Qty: 6
#120-57-05 Rod Seal, Qty: 6
#120-57-06 Packing Grease, Qty: 3
#153-67 Syringe, Disposable, 60 cc, Qty: 6
#170-13-3 O-ring for Test Cell, Viton, Qty: 24
#170-17 Valve Stem O-ring, Qty: 12
#170-18 Removable Cement Screen, 325 Mesh with 60 Mesh
Backup, Qty: 6
#171-90-09 Valve Stem, Filtrate Outlet, Qty: 2
#120-57-21 Knock Out Tool
#120-910-057-RK Repair Kit for Back Pressure Regulator
OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ote.com 5
LVDT
(Displacement
Transducer)
Test Cell
Assembly
Pressure
Transducer
Thermocouple
Pressure
Relief Valve
Backow
Pressure
Nitrogen/Gas
Pressure
Hydrostatic
Pressure
Thermocouple
Heating Jacket
Valve Stem
Top Filtrate Drain
Back Pressure
Regulator
Beaker
Filtrate Flask
Water Collection
Flask
Coolant Supply
Valve
Load Stands
OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ote.com 6
Installation 1. Carefully remove the unit from the packing crate and place it on a stable
counter top or table.
2. Plug the AC power cord into an appropriate outlet.
3. Connect a nitrogen air supply (at least 1,000 PSI) to the back of the unit
via the top ¼" female NPT port.
4. The Coolant In and Coolant Out ports on the back connect to plumbing
that circulates around the heating jacket. The cell can be cooled with
either tap water or a chiller. Both ports are ¼" NPT.
5. Connect the PC to the unit with a serial cable.
6. Turn the “Main Power” switch on.
OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ote.com 7
Setup Before beginning a test, the cement slurry should be fully conditioned
according to API specications. While the cement is conditioning, begin
preparing the equipment for the test. The test should begin no more than ve
minutes after the cement is conditioned.
1. Make sure all valves on the unit are closed.
2. Make sure all three regulators are closed by turning them fully counter-
clockwise.
3. Turn on the “Main Power” switch and wait for the PC to boot.
4. Connect the back pressure regulator to the “Backow Pressure” port on
the unit cabinet via the quick-connect hose.
5. Attach the tube to the back pressure regulator and feed it through the hole
in the unit cabinet.
Valve Stem
Back Pressure RegulatorBackow Pressure
6. Inside the cabinet, connect the tube from the back pressure receiver to
the inow (curved) port on the rst rubber stopper. Insert the rst rubber
stopper into the mouth of the ltrate ask and place the ltrate ask on the
left load stand.
7. Fill the second ask with 1,000 mL water and insert the second rubber
stopper. Connect another rubber tube from the ltrate ask to the water
collection ask and set the water collection ask next to two load stands.
OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ote.com 8
8. Place the overow from the water collection ask into the beaker and set
the beaker on the right load stand.
Make sure the rubber stoppers form a tight seal.
This setup allows the unit to automatically measure the ltrate and gas
volume collected during the test. Both the ltrate and the nitrogen gas
will be captured by the back pressure receiver. From there, it is emptied
into the ltrate ask. The ltrate will then be weighed by the load stand,
while the gas will be pushed into the water collection ask. In the water
collection ask, the gas displaces the water and pushes it into the beaker
where it is weighed by the load stand.
Since the density of water is 1 g/mL, the weight (in grams) of the
displaced water corresponds to the volume of nitrogen gas that has
migrated through the cement.
9. Return to the computer screen and wait for the “Filtrate Volume” and “Gas
Volume” values to stabilize. Zero both of these values.
Overow
Beaker
Load Stand
Water Collection Flask
Load Stand
OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ote.com 9
1. Open the software by double-clicking the icon on the desktop.
2. From the “Utilities” menu choose “Setup”.
DAQ Time: Determines how often the data le is updated.
Pressure Unit: Choose either PSI or MPa.
Temp Unit: Choose either Deg F or Deg C.
Distance Unit: Choose either Millimeter or Inches.
Archive Path: The location of the data le.
Print to Printer: At the end of the test, the software will automatically
generate an image le of the graph. If the “Print to Printer” box is
checked, this graph will automatically be printed to the default printer.
3. Click “OK” to save changes.
Software
Setup
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