Abstract: An improved curable epoxy resin composition of a vicinalpolyepoxide and an effective amount of a novel polyether urea curing agent is disclosed. The improved curable epoxy resins which are useful as coatings, castings, sealants, and adhesives show improved tensile shear strength, flexural strength, and ultimate elongation. The novel polyether urea curing agents of the instant invention are characterized by terminal primary amino groups and are formed by reaction of polyoxyalkylenepolyamines with urea, urea forming compounds, or bifunctional isocyanates.A preferred curing agent includes a mixture of a novel polyether urea formed by reaction of a polyoxypropylenepolyamine having a molecular weight of from about 200-2000 and an effective amount of urea; and another known epoxy resin curing agent such as polyoxyalkylenepolyamine in ratios of from about 5:1 to 1:5 by weight.
Abstract: The vertical conformance of a steam drive process is improved and steam override reduced by penetrating the zone between one injector and one producer, with an infill well which is in fluid communication with the bottom half of the formation, and producing petroleum from the infill well after steam channeling has occurred at the production well. After the water cut of the fluids being produced from the infill well reaches 95 percent, the infill well is converted from a producer to an injector and hot water is injected into the lower portion of the formation via the infill well and fluids are produced from the production well. By this means, oil is recovered from the lower portions of the formation adjacent the production well. After water breakthrough occurs at the production well, steam is injected into the infill well and fluids are recovered from the production well.
August 24, 1978
Date of Patent:
December 11, 1979
Alfred Brown, Brian L. Reynolds, Wilbur L. Hall
Abstract: A system for playing back a wide dynamic amplitude range analog signal that is digitized in floating point word form. The word being represented in digital signal form by the general algebraic form Q=.+-.AB.sup.-N where Q represents the amplitude of the analog signal, A represents the mantissa, B indicates the radix of the number system used, N represents the number of fixed gain amplifier steps, and is the exponent of B, each word is represented by a first plurality of binary bits representing N. The playback system includes a first converter receiving a reference voltage which converts the bits representing A to an interim analog signal. A second converter converts the bits representing N to a plurality of control signals. A resistor network is connected to ground and has N number of inputs and an output.
Abstract: Thermal oil recovery processes employing the injection of steam and/or hot water for mobilizing viscous petroleum sweep only a small fraction of the formation between the wells because of override, underride, or channeling resulting in poor vertical conformance, as well as poor horizontal conformance of the swept portion of the formation. Both vertical and horizontal conformance are improved significantly if steam is injected into a formation until channeling has begun, after which steam injection is terminated and an aqueous fluid is injected into the formation, which has a viscosity essentially the same as water and contains an emulsifying agent capable of forming a viscous emulsion in the portions of the formation where override, underride or channeling has occurred. After a small slug of emulsifying fluid has been injected, steam injection is resumed and as a consequence of the emulsion plug, moves into portions of the formation from which oil would not be recovered if the emulsion had not been injected.
May 10, 1978
Date of Patent:
November 27, 1979
Ching H. Wu, Alfred Brown, Wilbur L. Hall, Russell D. Shupe
Abstract: A settling tank for resolving a mixture of oil, water, and solids from an oil and solids-in-water influent includes two inclined and parallel baffles about which the influent water successively passes. Each baffle preferably has parallel V-shaped grooves in the under surface thereof for entrapping, guiding, and coalescing the oil droplets into large globs for channeling and passing through the openings between the baffles and the tank wall for rising to the surface for draw off. The clear water outlet is positioned on a horizontal plane intermediate horizontal planes through the low forward end of the upper baffle and the high rear end to ensure delivery of an oil-free and solids-free water. An upper oil outlet ensures delivery of a solids-free and water-free oil from the settling tank. A new method for assembling a settling tank is disclosed.
Abstract: Apparatus for measuring the wear of a shaft bearing includes a source of fluid, a valve, and a linear transducer. The transducer has a probe which may be urged aganst the shaft by admitting fluid from the source to a chamber in the transducer. As the probe is urged against the shaft, voltages provided by the transducer change in a relationship to the movement of the probe. The voltage change is monitored to measure the shaft bearing wear. Upon completion, the fluid is vented, which allows the probe to return to a rest position.
Abstract: An electronic control circuit incorporated with an AC type ignition system which employs a high-frequency continuous-wave oscillator. The system includes a control winding on a transformer that has a high voltage spark signal output winding. There is a transistor in series with the control winding, to switch on and off a circuit that controls the starting and stopping of the oscillator. And, there are a pair of time delay circuits which produce delay times that are inversely proportional to the speed of an internal combustion engine that uses the ignition system. These time delay circuits may be connected so as to use only one of them. Or, they may be connected in series, so that a desired step timing change may be introduced (or not) upon demand.
Abstract: Covers compounds of the formula: ##STR1## where R is lower alkyl and R.sub.1 is hydrogen, alkyl or aryl and ##STR2## where R is lower alkyl and R.sub.2 is hydrogen or alkyl. Also covers a method of producing a polyurethane by utilizing said above compounds as catalysts in reacting an organic polyisocyanate with an organic polyester polyol or polyether polyol in the presence of said catalyst.
Abstract: Apparatus for skimming surface fluid off of a main fluid including a floating collection housing adapted to float in such main fluid and a rotating skimming wheel having an annular skimming chamber including a plurality of compartments, each compartment being opened by a gravity actuated valve for skimming surface fluid off of the main fluid when such compartment is rotated into the main fluid so that the surface fluid is skimmed from the main fluid into such compartment, the compartment being subsequently emptied into the floating collection housing after rotation out of the main fluid. The buoyancy of the apparatus is adjustable to control the position of the compartments during skimming operations with respect to the interface between the surface and main fluids.
Abstract: Sensible heat in the hot effluent gas stream leaving a partial oxidation gas generator for the production of raw synthesis gas, reducing gas, or fuel gas is used at its maximum temperature to produce a continuous stream of superheated steam at a pressure which may exceed the pressure in the gas generator. The by-product superheated steam may be used as a dispersant or carrier of the fuel feed to the generator or as a temperature moderator. Optionally, a portion of the by-product superheated steam may be used as the working fluid in a turbine to produce mechanical work or electrical energy or both. The high steam superheat temperature results in a higher conversion efficiency. A shell and tube heat exchanger in which a stream of steam or cleaned generator gas is continuously bled from inside the tubes to the outside, or the reverse is employed. The bleed stream mixes with the effluent gas stream passing through the heat exchanger.
Abstract: A process for conversion of hydrogen and carbon monoxide into hydrocarbons in the presence of an ebullient bed of catalyst comprising reduced iron oxide promoted with potassium equivalent to 2-10 pounds potassium carbonate per 1000 pounds iron oxide catalyst, and having an average particle size in the range of 100-1000 microns, wherein the catalyst is chlorided for increasing the yield of C.sub.1 -C.sub.4 range hydrocarbons.
Abstract: A process for producing petroleum from subterranean formations is disclosed wherein production from the formation is obtained by driving a fluid from an injection well to a production well. The process involves injecting via the injection well into the formation an aqueous solution of sulfomethylated lignosulfonate salt as a sacrificial agent to inhibit the deposition of surfactant and/or polymer on the reservoir matrix. The process may best be carried out by injecting the sulfomethylated lignosulfonates into the formation through the injection well mixed with either a polymer, a surfactant solution and/or a micellar dispersion. This mixture would then be followed by a drive fluid such as water to push the chemicals to the production well.