Abstract: A video projection system employing a concave video screen which provides for enhanced depth cueing. A method of designing a variety of shapes of video screen surfaces by varying certain parameters of a common master equation. Video screen surface shapes providing optimum viewing for specific applications.

Abstract: A self-illuminating video screen system employing a concave display surface which provides for enhanced depth cueing. A method of designing a variety of shapes of self-illuminating video screen display surfaces by varying certain parameters of a common master equation. Self-illuminating video screen systems having display surface shapes providing optimum viewing for specific applications.

Abstract: A system for measuring and monitoring multi-phase fluid production of a plurality of individual wells, each operating as part of a common production field. Upstream multi-phase flow measurements are simultaneously taken at each individual well. Downstream multi-phase flow measurements are taken at a point where the production from the entire field is combined. The downstream multi-phase flow measurement is allocated back to each individual well based on the measured upstream multi-phase flow for each individual well.

Abstract: A non-contact vibrometer is employed to measure seismic energy imparted to the earth by a land vibrator. The non-contact vibrometer can be a laser vibrometer operable to measure the motion of a baseplate of the land vibrator. A computing device can be used to record both the imparted seismic energy detected by the non-contact vibrometer and reflected seismic energy sensed with geophones.

Abstract: A system for unloading fluids from a generally upright tubular member of a wellbore wherein a combustible fuel cell can be placed in the tubular member below the fluid and ignited to generate gasses. The gasses generated by the burning of the fuel cell can be used to force at least a portion of the fluid upward out of the tubular member.

Abstract: A downhole cementing system employing a cement choke within the casing to reduce the downward velocity of cement through the casing and thereby inhibit formation fracturing caused by vibration of the casing. The cement choke includes a tubular body defining a fluid passageway, a seat coupled to the tubular body and defining a seat orifice, a choke element coupled to the seat and restricting flow through the seat orifice, and a check valve coupled to the seat and operable to substantially block fluid flow through the seat orifice.

Abstract: A coiled tubing rig is operable to simultaneously translate and rotate coiled tubing in a borehole.

Abstract: Oxygen is removed from natural gas by contacting oxygen-containing natural gas with nitric oxide under conditions sufficient to produce nitrogen dioxide.

Abstract: An apparatus and method for enhancing oil recovery through improved injection well performance is provided, wherein a fluid is injected into the well bore at a pressure Pi, and a downhole fluid-actuated engine and pump assembly is employed as a booster in order to generate a high pressure output at pressure Ph greater than Pi and a low pressure output at pressure Pl lower than Pi; the respective output streams are directed to lower and higher permeability geological strata adjacent the well bore in order to increase production.

Abstract: A filtering means containing gelatinous and solid materials is cleaned without dismantling the filtering means by contacting the gelatinous material inside the filtering means with a solvent, thereby physically degrading the gelatinous material such that the degraded gelatinous material can pass through the filtering means.

Abstract: Selectively producing organic trisulfides by contacting, in the presence of a catalyst, a mercaptan and a sulfur compound under conditions sufficient to produce a organic polysulfides and hydrogen sulfide and controlling the concentration of hydrogen sulfide in the liquid reaction solution during specific reaction periods such that the production of organic trisulfide is enhanced and the production organic polysulfides having more or less than three sulfur atoms is inhibited.

Abstract: A catalyst composition and a process for using of the catalyst composition in a hydrocarbon conversion process are disclosed. The composition comprises an inorganic support, a Group VA metal or metal oxide, and optionally a Group IVA metal or metal oxide and a Group VIII metal or metal oxide. The process comprises contacting a fluid which comprises at least one saturated hydrocarbon with the catalyst composition under a condition sufficient to effect the conversion of the hydrocarbon to an olefin. Also disclosed is a process for producing the catalyst composition.

Abstract: A catalyst composition, a process for producing the catalyst composition, and a hydroconversion process for converting a fluid stream comprising at least one saturated hydrocarbon to C.sub.6 to C.sub.8 aromatic hydrocarbons such as benzene, toluene, and xylenes are disclosed. The catalyst composition comprises a zeolite and a promoter. The process for producing the composition comprises the steps of: (1) combining a zeolite with a complexing ligand and a promoter compound under a condition sufficient to produce a modified zeolite; and (2) heating the modified zeolite to produce a promoted zeolite. The hydroconversion process comprises contacting a fluid stream with the catalyst composition under a condition sufficient to effect the conversion of a saturated hydrocarbon to a C.sub.6 to C.sub.8 aromatic hydrocarbon.

Abstract: A composition is provided which comprises a polymer comprising repeat units derived from an unsaturated amide, an N-vinyl lactam, and optionally, a vinyl acid. Also provided is a water-based fluid composition which can be used as drilling fluid wherein the composition comprises calcium chloride and the polymer. Further providing is a process for using a water-based fluid wherein the process comprises contacting a subterranean formation with the water-based fluid composition disclosed above to effect the control of fluid loss of the water-based fluid composition.

Abstract: A novel composition including either a zeolite or an acid leached zeolite containing boron, zinc and phosphorus, used in the conversion of hydrocarbons. The novel composition is prepared by a novel method including incorporating into a zeolite or an acid treated zeolite material, preferably by use of a liquid solution, a zinc component, a boron component, and a phosphorus component.

Abstract: A composition comprises silicon, aluminum, zirconium, and boron. A process for producing the composition comprises contacting a silicon compound, an aluminum compound, a zirconium compound, and a boron compound under a condition sufficient to effect the production of a composition comprising silicon, aluminum, zirconium, and boron. Also disclosed is a process for catalytically cracking a hydrocarbon-containing fluid which comprises contacting said hydrocarbon-containing fluid with a catalyst composition which comprises silicon, aluminum, zirconium, and boron.