Apparatus and method for foaming fluids and for testing foamed fluids

An apparatus for foaming a well cement sample including at least water, cement and a foaming agent, comprising:

• a cylindrical foaming chamber;
• a perforated disk slidably disposed in said cylindrical foaming chamber;
• and
• means for rotating said cylinder to cause said disk to move in said cylindrical foaming chamber to agitate and foam the well cement sample in said cylindrical foaming chamber.

A method of testing a well cement comprising:

• placing desired amounts of at least water, cement, and a foaming agent in a pressure vessel to form a mixture;
• injecting a gas into said pressure vessel to pressurize said vessel to a desired pressure above atmospheric pressure;
• foaming said mixture in said pressure vessel;
• and
• conducting a fluid loss test on the foamed mixture without transferring said mixture to a separate pressure vessel.

A method of testing a well cement comprising:

• placing desired amounts of at least water, cement, and a foaming agent in a pressure vessel to form a mixture;
• injecting a gas into said pressure vessel to pressurize said vessel to a desired pressure above atmospheric pressure;
• rotating said mixture in said pressure vessel to foam said mixture;
• and
• conducting a test on the foamed mixture without transferring said mixture to a separate pressure vessel.

A method of testing a well cement comprising:

• placing desired amounts of at least water, cement, and a foaming agent in a pressure vessel to form a mixture;
• injecting a gas into said pressure vessel to pressurize said vessel to a desired pressure above atmospheric pressure;
• foaming said mixture in said pressure vessel, said vessel having first and second ends and having a plate disposed therein, said plate defining a plurality of openings therethrough, wherein said foaming step comprises moving said perforated plate through said mixture between said first and second ends to activate said foaming agent and disperse bubbles of said gas therein;
• and
• conducting a test on the foamed mixture without transferring said mixture to a separate pressure vessel.