OfiTE PPT User manual
Permeability Plugging Tester - P.P.T.
4,000 PSI (27,600 kPa) - 500°F (260°C)
Part No. 171-84 (115V)
Part No. 171-84-01 (230V)
Instruction Manual
Updated 1/4/2017
Ver. 3.0
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 2013
OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ote.com 1
Intro..................................................................................................2
Description......................................................................................2
Specications .................................................................................3
Components ...................................................................................4
Safety...............................................................................................6
Operation.........................................................................................9
Preparation .................................................................................9
Loading the Cell ........................................................................10
Test Procedure..........................................................................15
Disassembly .................................................................................16
Reporting Data..............................................................................18
Calculations ..................................................................................18
Maintenance..................................................................................19
Warranty and Return Policy ........................................................20
Table of
Contents
OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ote.com 2
The Permeability Plugging Tester (PPT) is a modication of the standard 500-
mL HTHP Filter press. It may be used in the eld or in a laboratory environ-
ment. The instrument is useful for performing ltration tests on plugging ma-
terials without the interference of particles settling on the lter medium during
the heat up process. The PPT is very useful in predicting how a drilling uid
can form a low permeable lter cake to seal off depleted, under pressured
intervals and help prevent differential sticking. Typical differential pressures
are much higher than those seen in standard HTHP testing
The pressure cell is similar to those seen in standard HTHP ltration testing,
but it is inverted with the lter medium and the back pressure receiver on top
of the assembly. The conventional cell may be operated to 2,000 PSI by us-
ing hardened steel set screws to secure the cell cap. For elevated pressure,
OFITE has designed a special cell with a working pressure of up to 4,000
PSI, pressurized with the conventional hydraulic pump. The cell is pressur-
ized with hydraulic oil and a oating piston separates the oil from the test uid
within the cell.
The cell is furnished with a threaded cell inlet cap, a oating piston, and a
threaded scribed outlet cap for the ceramic lter disks. The outlet end of the
cell has a ¼" (6.35 mm) deeper recess than a standard cell to allow for the
ceramic disk as a lter medium. The end cap used with the ¼" (6.35 mm)
disk has a scribed concentric pattern rather than the conventional screen.
Filter paper or other thin lter medium may be used with this cap by using
the spacer ring (#170-72) to ll the extra ¼" (6.35 mm) space. Also, an extra
thick end cap with a standard screen backup is furnished to use with thin lter
media - paper or metal.
All of the end caps are designed to accept the standard valve stem. The
inlet, or bottom, valve stem is tted with a quick-connect for the connection
to the hydraulic pressure manifold. The standard hydraulic pressure mani-
folds are equipped with a 4,000 PSI (27,600 kPa) relief valve. The outlet, or
upper, valve stem assembly consists of a dual valve stem with a ball valve in
the middle, which facilitates the opening and closing of the outlet ow. Power
consumption for the PPT heating jacket is 800 watts.
The 100-mL back pressure receiver is mounted on top of the heating jacket
and upside down, when compared to the normal HTHP lter press congura-
tion. It attaches to the cell outlet valve stem and is secured with the safety
pin (#171-23-1). The ttings on the receiver are reversed with the pressure
inlet on the small end (the upper end). A are tting may be provided if it is
desired to use the low-pressure side of a dual manifold on a nitrogen bottle
instead of the standard CO2 cartridges.
Intro
Description
OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ote.com 3
Specications - Weight: 61 lbs. (27.7 kg)
- Dimensions: 15" × 25" × 42" (38.1 × 63.5 × 106.7 cm)
- Shipping Weight: 90 lbs. (40.8 kg)
- Shipping Dimensions: 30" × 18" × 17" (76.2 × 45.7 × 43.2 cm)
- 800W Heater
- 316 Stainless Steel Test Cell
- Maximum Temperature: 500°F (260°C)
- Maximum Pressure: 4,000 PSI (27,600 kPa)
OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ote.com 4
Components #153-14 Graduated Cylinder, 50 mL × 1 mL, Glass
#154-20 Thermometer with Metal Dial, 8" Stem,
Dual Scale: 50° - 500°F / 0° - 250°C
#170-19 Filter Paper, 2.5" (6.35 cm), Grade #50, Box of 100
#170-53 Ceramic Filter Disk, 15 D, 50 µm
#171-23-1 Safety Pin with Lanyard
Heating Jacket:
#164-32 Male Connector for Power Cable (230 Volt Only)
#171-00 Heating Jacket, 800 Watt (115 Volt Only)
#171-01 Heating Jacket, 800 Watt (230 Volt Only)
#171-82 Power Cord (115 Volt Only)
#171-87 Location Pin
Test Cell:
#153-55 Grease, High Vacuum, 150 g Tube
#170-72 Spacer for Filter Paper, ¼"
#171-84-03 Strap Wrench
#171-85 Cell Assembly, 500 mL, Double Cap, Complete
#171-85-002 Cell Cap, Inlet
#171-86-1 Cell Body
#171-88-1 Cell Cap, Outlet, Scribed
#171-88-2 Cell Cap with Screen, Outlet, Scribed
#171-93 Piston
#171-95 T-handle for Piston
Inlet Pressuring:
#171-27 Hose, #5000, 6 Feet
#171-41 Gauge, 5000 PSI, 2½" Face, ¼" Bottom Connection
#171-84-02 Reducing Bushing, ⅛" MNPT × ⅛" FNPT
#171-90-02 Quick Coupler, Female
#171-90-03 Quick Coupler, Male
#171-90-04 Cross, ¼" NPT
#171-90-06 Reducing Bushing, ¼" MNPT × ⅛" FNPT
#171-90-07 Hex Nipple
#171-90-08 Valve Stem, Hydraulics Entry
#171-90-11 Elbow, Female, ⅛" NPT
#171-90-12 Elbow, Male, ¼" NPT
#171-90-13 Adapter, ¼" Flare × ¼" Male NPT
#171-90-14 Adapter, ⅛" NPT × ¼" Hose Barb
#171-92-1 Relief Valve, 4000 PSI
#171-96 Handpump
#171-96-1 Hydraulic Oil, 1 Quart
#171-98 Ball Valve for Inlet Pressure Line, ¼"
OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ote.com 5
Outlet Pressuring:
#170-04 CO2 Pressurize Unit
#171-10 Back Pressure Receiver, 100 mL (Modied)
#171-11 O-ring for Back Pressure Receiver, 100 mL
#171-23-1 Safety Pin with Lanyard
#171-90-09 Valve Stem, Filtrate Outlet
#171-90-10 Valve Stem, Receiver Entry
#171-97 Ball Valve for Outlet Pressure, ⅛"
O-rings:
#170-13-3 O-ring for Cell
#170-17 O-ring for Valve Stem
#170-77 O-ring for Spacer
#171-99 O-ring for Piston
Tools:
#171-90-15 6" Crescent Adjustable Wrench
#171-85-05 Spanner Wrench
#171-84-SP One Year Spare Parts for #171-84:
#143-00-1 Diaphragm for Airco Regulator
#143-02-13 O-ring for Puncture Pin Holder Assembly, CO2 Cartridge,
Qty: 2
#143-02-14 O-ring for Puncture Pin Assembly, Qty: 2
#143-05 *CO2 Bulbs EZ Puncture, PKG/10, UN# 1013, Qty: 30
#143-07 Repair Kit for Regulator
#153-14 Graduated Cylinder, 50 mL × 1 mL, Glass, Qty: 2
#154-20 Thermometer with Metal Dial, 8" Stem,
Dual Scale: 50° - 500°F / 0° - 250°C
#165-44-1 High-Temperature Thread Lubricant, 1 oz Tube, Qty: 2
#170-13-2 O-ring for Cell, Qty: 50
#170-17 O-ring For Valve Stem, Qty: 24
#170-19 Filter Paper, 2.5" (6.35 cm), Grade #50, Box of 100, Qty: 5
#170-32 Needle Valve, Male, ⅛" × ⅛" NPT
#171-11 O-ring for Back Pressure Receiver, Qty: 4
#171-23-1 Safety Pin with Lanyard, Qty: 2
#171-90-08 Valve Stem, Hydraulics Entry
#171-90-09 Valve Stem, Filtrate Outlet
#171-90-10 Valve Stem, Receiver Entry, Qty: 2
#171-96-1 Hydraulic Oil, 1 Quart, Qty: 2
#171-99 O-ring for Piston, Qty: 12
OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ote.com 6
Safety 1. For safe operation of the Hydraulic Pump Pressurization system, make
sure the pressure has been released and the gauge on the pump reads
zero before:
a. Attempting to disconnect the pressure hose from the cell at the quick-
connect.
b. Attempting to remove the cell from the heating jacket.
c. Reallocating or moving the PPT in the laboratory.
d. Relling the hydraulic pump.
e. Performing any maintenance including tightening leaking ttings on
the pump, hydraulic ttings, or cell assembly.
2. When relling or repairing the hydraulic system make sure any spilled oil
is cleaned. Oil on the oor is very slippery and can cause falls and injury.
Oil spills on the bench can accumulate and become a re hazard.
3. Always use either nitrogen or carbon dioxide to pressurize the back
pressure receiver. Never connect it to compressed air, oxygen, or other
non-recommended gas. If nitrogen is used it must be supplied in an
approved nitrogen gas cylinder and it must be secured to meet safety
standards. CO2 is normally supplied in small bulbs, which contain about
900 PSI, and are frequently used for eld operations. Do not allow these
bulbs to be heated or exposed to re as they can explode if overheated.
4. When pressurizing the back pressure receiver always open the supply
pressure rst, then adjust the regulator. When de-pressurizing, shut off
the supply pressure rst by backing out the regulator T-screw (counter-
clockwise), then bleed the system of pressure by opening the bleeder
valve.
5. Cooling the hot cell under water is very dangerous. Be very careful to
avoid touching or accidentally dropping the cell. Steam generated when
the cell contacts water can cause severe burns.
6. Make sure the electrical source is fused and grounded. Verify the power
cord on the heating jacket is in good condition and has the proper ground
connection.
OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ote.com 7
7. Electrical problems in the wiring or the heaters may not be obvious by
looking at the equipment. A malfunction is indicated if the unit starts blow-
ing fuses or tripping breakers, the heating time seems too long, or the
thermostat control does not repeat. These conditions indicate an elec-
trical repair job may be required. Always disconnect the power cables
before attempting any repair.
8. The ltration cell assembly is a pressure vessel and these safety precau-
tions should be followed:
a. Cell bodies that show signs of stress cracking, severe pitting or have
damaged threads must not be used.
b. Cell caps showing evidence of damaged or deformed threads must
not be used.
It is strongly recommended the instruction manual be attached to the
apparatus and read completely prior to the initial operation by anyone
unfamiliar with the equipment.
OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ote.com 8
Gauge (#171-34)
Regulator (#170-08)
Valve Stem (#171-90-10)
Valve Stem (#171-90-10)
Outlet Valve (#171-97)
Valve Stem (#171-90-9)
Heating Jacket
(#171-00 / 171-01)
Thermostat (#171-71)
Cell Rest Plunger
(#171-94)
Inlet Valve Stem
(#171-90-08)
Gauge (#171-41)
Graduated Cylinder
(#153-14)
Inlet Valve
(#171-98)
Hydraulic Pump
(#171-96)
Thermometer
(#154-20)
Spacer (#170-72)
Allen Wrench (#170-27)
T-Handle (#171-95)
Hydraulic Oil
(#171-96-1)
Hose
(#171-27)
Safety Bleeder Valve
(#171-92-1)
Quick-Connect, Female
(#171-90-02)
Quick-Connect, Male
(#171-90-03)
Hose Barb (#171-90-14)
Retainer Pin (#171-23-1)
Back Pressure
Receiver (#171-10)
Retainer Pin (#171-23-1)
CO2 Pressure Assembly (#170-04)
Barrel (#143-03)
OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ote.com 9
Operation
Preparation
1. Before starting a test, close all valves and ensure that all regulators are
rotated fully counterclockwise.
2. Connect the heating well to a 110V or 220V AC power source as specied
on the nameplate. The heating jacket requires an 800W power supply.
3. Turn the thermostat to about mid-scale to begin heating and place a metal
dial thermometer in the thermometer well.
The pilot light will turn on when the heating well is at the temperature
setpoint. The temperature should read 10°F (6°C) above the desired test
temperature. If it is not, adjust the thermostat.
4. Before using the ceramic disk, soak it for at least 10 minutes in base uid.
Use water for freshwater-based uids, brine for saltwater-based uids,
diesel for oil-based uids, and a synthetic base for synthetic-based uids.
Never reuse a disk except for return permeability studies. Below is a list
of ceramic disks available:
#170-55 Ceramic Filter Disk, 775 milli-darcy, 10 micron, 2½" × ¼"
#170-53-2 Ceramic Filter Disk, 850 milli-darcy, 12 micron, 2½" × ¼"
#170-53-3 Ceramic Filter Disk, 3 darcy, 20 micron, 2½" × ¼"
#170-51 Ceramic Filter Disk, 8 darcy, 40 micron, 2½" × ¼"
#170-53 Ceramic Filter Disk, 15 darcy, 50 micron, 2½" × ¼"
#170-53-1 Ceramic Filter Disk, 20 darcy, 55 micron, 2½" × ¼"
#170-53-4 Ceramic Filter Disk, 40 darcy, 120 micron, 2½" × ¼"
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