OPERATING/MAINTENANCE INSTRUCTIONS
OFI BENCHTOP HPHT CURING CHAMBER
GENERAL
The Model 200 HPHT Curing Chamber is utilized to prepare well cement specimens for
compressive strength tests. It is necessary to determine the amount of time required for a
cement to develop compressive strength so that drilling\production operations can be
resumed as quickly as possible. The goal is to design a slurry which can quickly develop
compressive strength so that the "waiting on cement time" may be minimized. OFI's HPHT
Curing Chambers were designed to provide a means of curing cement specimens under
typical downhole temperatures and pressures.
METHOD OF OPERATION
Cement is poured into a special mold which produces specimens that measure 2" X 2" X 2".
The mold is placed into the test cell and the pressure of the test cell is increased via an air
driven hydraulic pump. Test temperature is governed by a PID temperature controller which
actuates the heater. After a predetermined amount of time the temperature of the test cell is
reduced by the cooling system. Specimens are removed and the compressive strength is
determined as outlined in API Specification 10.
INSTALLATION
1.
Carefully remove the instrument from the wooden crate.
2.
Please note that leveling legs are provided to level the instrument. These legs can be
screwed in and out to level the cabinet.
3.
An air/nitrogen (100-120 psi) supply should be connected to the air supply on the back
of the instrument.
PLEASE NOTE THAT OFI UTILIZES 1/4 INCH NPT FEMALE CONNECTORS FOR
ALL SUPPLY LINES.
4.
The drain and water supply lines should be connected in similar manner.
5.
Ensure that all electrical switches are in the "OFF" position and make the necessary
electrical connections in accordance to local codes. Ensure that the unit is grounded.
