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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. 

 
 

Содержание 200

Страница 1: ...essure 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 ins...

Страница 2: ...Y MOLDS The slurry shall be placed in the prepared molds in a layer equal to one half of the mold depth and puddled 25 times per specimen with a puddling rod The slurry shall be placed in all the specimen compartments before commencing the puddling operation After puddling the layer the remaining slurry shall be stirred by hand using a puddling rod or spatula to eliminate segregation the molds fil...

Страница 3: ...e controller hinges downward 2 Depress the scroll key the right key behind the hinged panel until a parameter appears Continue to press the key until the parameter AL1 appears 3 Press the UP or DOWN arrow keys until the desired high alarm setpoint is obtained 4 Wait approximately 10 seconds and the controller will automatically return to the normal display mode TIMER The Model 200 incorporates a t...

Страница 4: ...urotherm Model 818 is the most important component of the temperature control system and it is strongly recommended that operators carefully study the Model 818 instruction manual A Program the temperature profile you wish to perform into the Model 818 Controller B Turn the HEAT switch to ON to activate the heaters NOTE THAT THE PRESSURE WILL INCREASE SIGNIFICANTLY DUE TO THE THERMAL EXPANSION OF ...

Страница 5: ...tering the test cell Close all valves and return all switches to the OFF position GENERAL MAINTENANCE 1 One of the most important elements concerning trouble free operation is keeping the interior of the test cell as clean as possible Never insert a cement covered cement mold into the test cell and periodically examine the test cell to ensure that it is clean High pressure valves wear quickly when...

Страница 6: ...For more information please contact us ExpotechUSA 10700 Rockley Road Houston Texas 77099 USA 281 496 0900 voice 281 496 0400 fax E mail sales expotechusa com Website www ExpotechUSA com ...

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