Abstract: Alkaline earth metal compounds may be fluid loss control agents for viscoelastic surfactant (VES) fluids used for well completion or stimulation in hydrocarbon recovery operations. The VES fluid may further include proppant or gravel, if it is intended for use as a fracturing fluid or a gravel packing fluid, although such uses do not require that the fluid contain proppant or gravel. The fluid loss control agents may include, but not be limited to, oxides and hydroxides of alkaline earth metal, and in one case magnesium oxide where the particle size of the magnesium oxide is between 1 nanometer to 0.4 millimeter. The fluid loss agent appears to associate with the VES micelles and together form a novel pseudo-filter cake crosslinked-like viscous fluid layer that limits further VES fluid flow into the porous media. The fluid loss control agent solid particles may be added along with VES fluids.

Abstract: An aqueous, viscoelastic fluid gelled with a viscoelastic surfactant (VES) is stabilized and improved with an effective amount of an alkali earth metal oxide alkali earth metal hydroxide, alkali metal oxides, alkali metal hydroxides transition metal oxides, transition metal hydroxides, post-transition metal oxides, and post-transition metal hydroxides. These fluids are more stable and have a reduced or no tendency to precipitate, particularly at elevated temperatures. The additives may reduce the amount of VES required to maintain a given viscosity. These stabilized, enhanced, aqueous viscoelastic fluids may be used as treatment fluids for subterranean hydrocarbon formations, such as in hydraulic fracturing. The particle size of the magnesium oxide or other agent may be nanometer scale, which scale may provide unique particle charges that use chemisorption, crosslinking and/or other chemistries to associate and stabilize the VES fluids.

Abstract: An aqueous, viscoelastic fluid gelled with a viscoelastic surfactant (VES) is stabilized and improved with an effective amount of an alkali earth metal oxide and/or alkali earth metal hydroxide. These fluids are more stable and have reduced or no tendency to precipitate, particularly at elevated temperatures. The additives may also increase viscosity to the point where less VES is required to maintain a given viscosity. These stabilized, enhanced, aqueous viscoelastic fluids may be used as treatment fluids for subterranean hydrocarbon formations, such as in hydraulic fracturing.

Abstract: A method and apparatus for concurrent testing of a plurality of microprocessors, each of which may have a different revision, by creating an abstract base class which specifies the names of a plurality of tests, creating a derived class for each revision and defining each of the tests appropriately for each of the derived classes, instantiating an object from one of the derived classes for each of the microprocessors and executing the tests by reference to the objects. A computer system is configured to be coupled to the microprocessors and, upon execution of a debug/test application on the computer system, the revision of each microprocessor is determined and an object is instantiated from the derived class corresponding to the revision. Each object is thereby dynamically bound to the tests defined for the derived class corresponding to the revision, and references to the tests via the objects automatically execute the test code specific to appropriate revision of the microprocessor.

Abstract: A method and apparatus for testing one of a plurality of revisions of a microprocessor by creating an abstract base class which specifies the names of a plurality of tests or attributes, creating a derived class for each revision and defining each of the tests or attributes appropriately for each of the derived classes, instantiating an object from one of the derived classes and executing the tests by reference to the object. A computer system is configured to be coupled to a microprocessor which may be any one of a plurality of revisions. Upon execution of a debug/test application on the computer system, the revision of the microprocessor is determined and the object is instantiated from the derived class corresponding to the revision. The object is thereby dynamically bound to the tests defined for the derived class corresponding to the revision and references to each test via the object automatically execute the test code specific to the revision of the microprocessor.

Abstract: The present invention permits a primary launch engine to display the names of, and information relating to, and cause the execution of diagnostic/test programs and/or batch-type routines for the silicon validation of microprocessors not only in existence at the time the primary launch engine is developed and compiled, but also, diagnostic/test programs and/or batch-type routines for the silicon validation of microprocessors that are developed and/or modified after the primary launch engine is developed and compiled without requiring modifications to, or the recompilation of, the primary launch engine. To do so, the present invention utilizes specialized data files consisting of one or more screen definition files and/or one or more script files wherein each screen definition file contains necessary menu structure and response information for each of the available diagnostic/test programs and wherein each of the script files contains sequencing and parameter information for each of the batch-type routines.