Constant voltage pressure control method used for oil well cement curing kettle
A pressure control and oil well cement technology, which is applied in the direction of electric fluid pressure control, etc., can solve the problems such as the failure to test the flexural performance of oil well cement, the inability to achieve constant pressure heating and constant pressure cooling, and the maintenance of strip test blocks.
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[0052] The present invention will be further described below in conjunction with the drawings:
[0053] A constant pressure control method for oil well cement curing kettle includes the following steps:
[0054] Constant pressure heating step: The pressure of the kettle body containing the mold and water of the cement sample is increased after heating, and the excess pressure is drained by the back pressure controller, so that the kettle body maintains a constant pressure during the heating process;
[0055] Constant pressure and constant temperature step: After the constant pressure heating step, keep the temperature constant and keep the pressure of the kettle constant within the fluctuation range;
[0056] Constant pressure cooling step: The pressure of the kettle body containing the mold and water of the cement sample is reduced by heat exchange and cooling with cold water. When the pressure of the kettle body is lower than the back pressure, the back pressure controller keeps the ...
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