OfiTE 170-91 User manual

HTHP Pressure Relief Tool
US Patent 9,375,715
Part No. 170-91
Instruction Manual
Updated 7/6/2016
Ver. 2.0
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 2013

OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: [phone] / Fax: [phone] / www.ote.com 1
Introduction.....................................................................................2
Components ...................................................................................2
Safety...............................................................................................2
Procedure........................................................................................3
Table of
Contents

OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: [phone] / Fax: [phone] / www.ote.com 2
High temperature, high pressure ltration cells are designed to test the seal-
ing characteristics of drilling uids and cement. Unfortunately, sometimes
the test uid seals the entire cell, making it difcult to release the pressure.
A clogged cell is a safety hazard for lab personnel. Without a safe way to
release pressure, everyone in the lab is at risk.
The HTHP Pressure Relief Tool provides a safe way to release the pressure
in a clogged cell. It screws onto the cell cap using the existing valve stem
port. Then, using a T-handle, the operator can drive a pin into the cell to
puncture through any obstruction. The pressure will then vent safely through
the vent pipe, away from people and equipment.
#130-77-069 High Pressure Fitting
#170-17 O-ring for Valve Stem
#170-91-001 Valve Stem
#170-91-002 Body
#170-91-003 Plunger Rod
#170-91-004 Plunger Stop
#170-91-005 Puncture Pin
#170-91-006 End Cap
#170-91-007 Handle
#171-23-2 Safety Pin with Lanyard
Trapped pressure inside an HTHP ltration cell can be very dangerous. Take
the following precautions before attempting to open the cell:
1. Always wear appropriate personal protective equipment (PPE).
2. Never attempt to open a hot cell. Make sure the uid in the cell has
cooled down to ambient temperature.
3. Make sure the cell caps and pressure ports are pointed away from people
and equipment.
4. Place a rag or towel over the valve stem and slowly unscrew and remove
it. If the pressure is still not released, then use the HTHP Pressure Relief
Tool to remove the obstruction.
Introduction
Components
Safety

OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: [phone] / Fax: [phone] / www.ote.com 3
Procedure 1. Remove the valve stem and inspect both o-rings. Replace any that show
signs or wear or damage.
2. Replace the valve stem and secure it in place with the safety pin.
3. Screw the valve stem on the HTHP Pressure Relief Tool into the valve
stem port on the cell cap.
4. Point the vent pipe away from people and equipment.
5. Slowly turn the t-handle clockwise. You should feel some resistance and a
small burst of released pressure when the pin punctures the obstruction.
6. Slowly turn the t-handle counterclockwise. The remaining pressure will
vent when the pin is free of the obstruction.
7. Unscrew and remove the valve stem from the cell cap.
8. Clean the HTHP Pressure Relief Tool:
a. Remove the safety pin and valve stem.
b. Flush the valve stem, body, and vent pipe with water (for water-based
uids) or solvent (for oil-based uids).
c. Allow all components to dry before reassembling.
T-handle
Vent Pipe
Safety Pin
Valve Stem
Drill Bit