Programmable digital temperature controller
First Claim
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1. An apparatus for controlling a temperature device, comprising:
- heat mode select switch means for placing said apparatus in a heat mode of operation from which one of three selectable states can be entered;
automatic state select switch means for placing said apparatus in an automatic operation state when said apparatus is placed in said heat mode;
isothermal state select switch means for placing said apparatus in an isothermal operation state when said apparatus is placed in said heat mode;
manual state select switch means for placing said apparatus in a manual operation state when said apparatus is placed in said heat mode;
information entry switch means for providing manually selectable numerical data to said apparatus;
temperature information select switch means for directing said apparatus to receive manually selectable temperature information from said information entry switch means;
time information select switch means for directing said apparatus to receive manually selectable time information from said information entry switch means;
rate information select switch means for directing said apparatus to receive manually selectable rate information from said information entry switch means;
casing data select switch means for instructing said apparatus to utilize predetermined casing temperature and casing time parameters stored in a memory of said apparatus;
liner data select switch means for instructing said apparatus to utilize predetermined liner temperature and liner time parameters stored said memory;
squeeze data select switch means for directing said apparatus to utilize predetermined squeeze temperature ans squeeze time parameters stored said memory;
means, responsive to the sequential actuation of said heat mode select switch means, said automatic state select switch means, one of said casing data select switch means, liner data select switch means, or squeeze data select switch means, said information entry switch means, said rate information select switch means, and said information entry switch means, for controlling the temperature device using the predetermined temperature and time parameters selected by the actuation of one of said casing data select switch means, said liner data select switch means or said squeeze data select switch means;
means, responsive to the sequential actuation of said heat mode select switch means, said isothermal state select switch means, said temperature information select switch means, and said information entry switch means, for controlling the temperature device to reach a selectable temperature as selected by the actuation of said temperature information select switch means and said information entry switch means;
means, responsive to the sequential actuation of said heat mode select switch means, said manual state select switch means, one of said casing data select switch means, liner data select switch means, or squeeze data select switch means, said information entry switch means, and either said temperature information select switch means and said information entry switch means or said time information select switch means and said information entry switch means, for controlling the temperature device in an automatic with partial override substate wherein the predetermined temperature and time parameters selected by the actuation of one of said casing data select switch means, said liner data select switch means, or said squeeze data select switch means are overridden by the temperature or time data manually selected by the actuation of one of said temperature information select switch means and said information entry switch means or said time information select switch means and said information entry switch means;
means, responsive to the sequential actuation of said heat mode select switch means, said manual state select switch means, said temperature information select switch means, said information entry switch means, said time information select switch means and said information entry switch means, for controlling the temperature device to achieve a temperature selected by the actuation of said temperature information select switch means and said information entry switch means in a time selected by the actuation of said time information select switch means and said information entry switch means; and
means, responsive to the sequential actuation of said heat mode select switch means, said manual state select switch means, said rate information select switch means, said information entry switch means, said temperature information select switch means, and said information entry switch means, for controlling the temperature device to achieve a temperature selected by the actuation of said temperature information select switch means and said information entry switch means at a rate selected by the actuation of said rate information select switch means and said information entry switch means.
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Abstract
Temperature of a heating device is controlled by a microprocessor in an electrical circuit which electrically communicates temperature control signals to the heating device. The control signals are generated from a predetermined compilation of data stored in the electrical circuit or from external data which can be entered and used to control the temperature in the heating device to a selectable value at a rapid rate or to achieve one or more temperatures at selected rates. The external data entry and control is provided by a human-electronic interface.
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Citations
11 Claims
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1. An apparatus for controlling a temperature device, comprising:
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heat mode select switch means for placing said apparatus in a heat mode of operation from which one of three selectable states can be entered; automatic state select switch means for placing said apparatus in an automatic operation state when said apparatus is placed in said heat mode; isothermal state select switch means for placing said apparatus in an isothermal operation state when said apparatus is placed in said heat mode; manual state select switch means for placing said apparatus in a manual operation state when said apparatus is placed in said heat mode; information entry switch means for providing manually selectable numerical data to said apparatus; temperature information select switch means for directing said apparatus to receive manually selectable temperature information from said information entry switch means; time information select switch means for directing said apparatus to receive manually selectable time information from said information entry switch means; rate information select switch means for directing said apparatus to receive manually selectable rate information from said information entry switch means; casing data select switch means for instructing said apparatus to utilize predetermined casing temperature and casing time parameters stored in a memory of said apparatus; liner data select switch means for instructing said apparatus to utilize predetermined liner temperature and liner time parameters stored said memory; squeeze data select switch means for directing said apparatus to utilize predetermined squeeze temperature ans squeeze time parameters stored said memory; means, responsive to the sequential actuation of said heat mode select switch means, said automatic state select switch means, one of said casing data select switch means, liner data select switch means, or squeeze data select switch means, said information entry switch means, said rate information select switch means, and said information entry switch means, for controlling the temperature device using the predetermined temperature and time parameters selected by the actuation of one of said casing data select switch means, said liner data select switch means or said squeeze data select switch means; means, responsive to the sequential actuation of said heat mode select switch means, said isothermal state select switch means, said temperature information select switch means, and said information entry switch means, for controlling the temperature device to reach a selectable temperature as selected by the actuation of said temperature information select switch means and said information entry switch means; means, responsive to the sequential actuation of said heat mode select switch means, said manual state select switch means, one of said casing data select switch means, liner data select switch means, or squeeze data select switch means, said information entry switch means, and either said temperature information select switch means and said information entry switch means or said time information select switch means and said information entry switch means, for controlling the temperature device in an automatic with partial override substate wherein the predetermined temperature and time parameters selected by the actuation of one of said casing data select switch means, said liner data select switch means, or said squeeze data select switch means are overridden by the temperature or time data manually selected by the actuation of one of said temperature information select switch means and said information entry switch means or said time information select switch means and said information entry switch means; means, responsive to the sequential actuation of said heat mode select switch means, said manual state select switch means, said temperature information select switch means, said information entry switch means, said time information select switch means and said information entry switch means, for controlling the temperature device to achieve a temperature selected by the actuation of said temperature information select switch means and said information entry switch means in a time selected by the actuation of said time information select switch means and said information entry switch means; and means, responsive to the sequential actuation of said heat mode select switch means, said manual state select switch means, said rate information select switch means, said information entry switch means, said temperature information select switch means, and said information entry switch means, for controlling the temperature device to achieve a temperature selected by the actuation of said temperature information select switch means and said information entry switch means at a rate selected by the actuation of said rate information select switch means and said information entry switch means. - View Dependent Claims (2, 3, 4)
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5. An apparatus for controlling a temperature at which a cement slurry is to be tested, said apparatus comprising:
- information storage means for storing a compilation of data including predetermined parameters of casing temperature values and time values associated with said casing temperature values, liner temperature values and time values associated with said liner temperature values, and squeeze temperature values and time values associated with said squeeze temperature values;
switch means for manually entering into said information storage means variable temperature and time information; and
computer means, responsive to said predetermined parameters and said variable temperature and time information, for determining bottom hole circulating temperature values and time values associated with said bottom hole circulating temperature values and for determining bottom hole static temperature values and time values associated with said bottom hole static temperature values for controlling said temperature at which a cement slurry is to be tested. - View Dependent Claims (6, 7, 8)
- information storage means for storing a compilation of data including predetermined parameters of casing temperature values and time values associated with said casing temperature values, liner temperature values and time values associated with said liner temperature values, and squeeze temperature values and time values associated with said squeeze temperature values;
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9. A method of non-destructively testing a material at a test temperature, said method comprising the steps of:
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placing said material in a test environment to be maintained at said test temperature; providing a predetermined compilation of data including casing temperature and casing time parameters, liner temperature and liner time parameters, and squeeze temperature and squeeze time parameters; selectably entering variable modification parameters with said predetermined compilation of data; providing first switch means for controlling said test temperature in an automatic operation state; providing second switch means for controlling said test temperature in an isothermal operation state; providing third switch means for controlling said test temperature in a manual operation state; actuating one of said first switch means, said second switch means, or said third switch means; determining a first temperature value and a first time value from said predetermined compilation of data when said first switch means is actuated; determining a second tempeature value and a second time value from, and only from, said variable modification parameters when said second switch means is actuated; determining a third temperature value and a third time value from a combination of said predetermined compilation of data and said variable modification parameters when said third switch means is actuated; controlling said test temperature of said environment in response to said first temperature value and said first time value when said first switch means is actuated; controlling said test temperature of said environment in response to said second temperature value and said second time value when said second switch means is actuated; controlling said test temperature of said environment in response to said third temperature value and said third time value when said third switch means is actuated; and observing the non-destructive response of said material in said test environment to said steps of controlling said test temperature.
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10. A method for non-destructively testing a cement slurry, comprising the steps of:
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associating said cement slurry with a heating device; and controlling said heating device to a selectable temperature for a selectable time period, said step of controlling said heating device including; maintaining in a memory means of a computer means a predetermined compilation of data including tables of American Petroleum Institute temperature and time parameters used for testing cement slurries used in downhole environments; providing means for entering modification parameters into said computer means; computing, from said predetermined compilation of data and said modification parameters, bottom hole circulating temperature values and time values associated with said bottom hole circulating temperature values and bottom hole static temperature values and time values associated with said bottom hole static temperature values; and operating said heating device in response to said bottom hole circulating temperature values and time values associated with said bottom hole circulating temperature values and said bottom hole static temperature values and time values associated with said bottom hole static temperature values. - View Dependent Claims (11)
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Specification