Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 6393365 | Coherency stack of seismic traces A method for suppressing noise in a common depth point gather of seismic data traces is disclosed in which noisy data traces are detected and muted by a sequence of data processing steps prior to making a final stack of the data traces.... | 05/21/2002 |
| 6275776 | Method for characterizing residual crude oil and petroleum fractions A method to rapidly characterize the hydrocarbon chemistry of heavy residual petroleum mixtures uses three model equations for predicting aromatic carbon content, aromatic hydrogen content and total hydrogen content of the heavy residual oil. The predicti... | 08/14/2001 |
| 6249746 | Automated seismic isochron analysis A computer implemented method for mapping seismic attributes derived from analysis of isochron measurements is disclosed. According to the disclosed method planar surfaces, which model the upper and lower surface of a subterranean layer, are numerically i... | 06/19/2001 |
| 6228650 | Acid catalyst regeneration control In an HF alkylation process where an acid catalyst regeneration column separates HF acid from ASO and water to provide regenerated catalyst for a catalyst circulation stream, and where buildup of ASO in the catalyst circulation stream is encountered, an i... | 05/08/2001 |
| 6223126 | Multi-attribute seismic waveform classification A computer implemented method for analyzing seismic data to discover a real trends of multi-attributes in a seismic data volume is disclosed. According to the disclosed method and apparatus the full waveforms of multiple traces are compared in a zone that... | 04/24/2001 |
| 6215499 | Method and apparatus for interactive curved surface seismic interpretation and visualization An enlarged computer graphic image of seismic data is displayed on a concave three-dimensional surface having a shape corresponding to the shape of selected data extracted from a three-dimensional seismic volume. Thus providing an enlarged image of a seis... | 04/10/2001 |
| 6178807 | Method for laboratory measurement of capillary pressure in reservoir rock An effective laboratory method for developing complete capillary pressure curves involves directly measuring an oil/water saturation profile within a cylindrical porous rock core plug. The saturation profile, which includes a free water level, is establis... | 01/30/2001 |
| 6092025 | Hydrocarbon edge detection using seismic amplitude A computer implemented method and apparatus for discovering hydrocarbon bearing formations yields a direct indication of hydrocarbon resulting from analyzing seismic amplitude data. The method uses an algorithm for determining a seismic attribute known as... | 07/18/2000 |
| 6047774 | System for drilling and completing multilateral wells The time required for establishing a multilateral well is reduced by enlarging a section of a wellbore and running a multilateral tool into the enlarged wellbore section. The multilateral tool, which is suitable for running into a wellbore on a primary ca... | 04/11/2000 |
| 6026058 | Method for sorting seismic data An improved method for gathering traces in a 3-D seismic survey is disclosed. In one configuration, receiver lines having equally spaced geophone receivers stations are run in one direction, and lines of equally spaced shotpoint stations run orthogonal to... | 02/15/2000 |
| 6018498 | Automated seismic fault detection and picking A computer implemented method and apparatus is disclosed for automatically picking faults in a recorded 3D seismic trace data volume. The method employs test planes, which are mathematically inserted into the seismic data volume to approximate dip and azi... | 01/25/2000 |
| 5988199 | Corporation stop assembly A fitting for coupling a service line to a polyethylene fluid distribution pipe such as a water main or a gas main includes a stub length of polyethylene pipe that serves as a base for attaching a corporation stop valve. The cross section of the open base... | 11/23/1999 |
| 5967232 | Borehole-conformable tool for in-situ stress measurements A downhole tool facilitates in-situ borehole measurement of stress required to initiate a fracture in a desired direction in subterrean formation. The tool is constructed by longitudinally splitting a cylinder in half, and in use the tool includes an infl... | 10/19/1999 |
| 5946480 | Method and apparatus for computer simulation of pentane isomerization reactions A well reasoned steady state model for simulation of pentane isomerization in a long tubular reactor predicts important reaction variables such as feed conversion, product yields, temperature and pressure. The predictions are based on inputs including fee... | 08/31/1999 |
| 5901112 | Signal energy enhancement for seismic exploration Harmonics, which appear with seismic reflection signals and are responsive to actual vibrations of a land-vibrator for petroleum exploration, are effectively utilized in pulse compression techniques by applying a correlation operator (CO) signal represent... | 05/04/1999 |
| 5896885 | Tapping saddle pipe fitting A compact hot-tap saddle pipe fitting made of weldable plastic material integrates a branch saddle and a tubular adapter into a monolithic tee shaped unit. The fitting, which is characterized by short overall dimensions and a reinforced base portion, allo... | 04/27/1999 |
| 5842518 | Method for drilling a well in unconsolidated and/or abnormally pressured formations A fiber reinforced cement lining for an unconsolidated or otherwise problematic zone in a wellbore is built up by first under-reaming the section of the wellbore to be stabilized by the cement lining. Next a drillable metallic liner is centralized in the ... | 12/01/1998 |
| 5841678 | Modeling and simulation of a reaction for hydrotreating hydrocarbon oil A computer implemented method for modeling and simulating a hydrotreating reactor is disclosed where a first step in the simulation utilizes a computer data base of reaction kinetic parameters for hydrotreating sulfur and metals contaminated residuum and ... | 11/24/1998 |
| 5835882 | Method for determining barriers to reservoir flow A method and apparatus for predicting barriers to fluid flow in a subterranean reservoir using well data and 3-D seismic data are disclosed, where a preferred first step in the method models petrophysical properties of the reservoir to provide model logs ... | 11/10/1998 |
| 5835883 | Method for determining distribution of reservoir permeability, porosity and pseudo relative permeability A method and apparatus for predicting distribution of reservoir permeability or porosity and pseudo relative permeability using well data and 3-D seismic data are disclosed, where a preferred first step in the method models the reservoir property of inter... | 11/10/1998 |
| 5828307 | Hydrocarbon gas monitor desk An enclosure for housing electrical equipment is constructed to simplify use of general purpose electrical equipment at a location in a petroleum refinery which may contain combustible vapors. The construction provides an enclosure that is vapor tight exc... | 10/27/1998 |
| 5824880 | Automated drop-weight impact testing A test fixture of the type that requires repeated manual lifting of weights in a drop-tube for performing an ASTM drop weight test, is provided with a computer automated pneumatically powered lift mechanism. The lift mechanism for the weights responds to ... | 10/20/1998 |
| 5774381 | Modeling and simulation of catalytic cracking A kinetic model for a catalytic cracking riser reactor is stored in a computer for simulating a hydrocarbon cracking reaction. The stored model describes a reactants, an intermediate, and a product species, which are lumped according to boiling range. Rea... | 06/30/1998 |
| 5724833 | Control scheme for cryogenic condensation In a cryogenic condensation scheme used for benzene removal in a process for liquefying natural gas, two series connected separation columns are provided with a feedstream precooled in a heat exchanger to a temperature that will at least condense the benz... | 03/10/1998 |
| 5706194 | Non-unique seismic lithologic inversion for subterranean modeling A method of modeling subsurface reservoir conditions deals with non-uniqueness of seismic reflection signals with respect to reservoir conditions by proposing and then comparing both seismic and lithologic data for forward model sites to select the most l... | 01/06/1998 |
| 5671153 | Chemical reactor feed control In a process for manufacture of a chemical product in which a plurality of individual reactant containing feedstreams are combined to form a mixed feedstream for a reactor, and wherein at least one of the plurality of feedstreams is subject to variations ... | 09/23/1997 |
| 5669238 | Heat exchanger controls for low temperature fluids In a heat exchange scheme associated with a gas purification column in an LNG recovery process, in which heat exchange is desired between fluids of such widely different temperatures that thermal shock could result in damage to heat exchanger apparatus, a... | 09/23/1997 |
| 5651270 | Core-in-shell heat exchangers for multistage compressors In multistage refrigeration compression, where liquid refrigerant withdraw from a core-in-shell type heat exchanger connected to a high compression stage is passed to a similar exchanger connected to a lower compression stage, liquid level stability in th... | 07/29/1997 |
| 5625194 | Continuous cleaning of lamp wells for ultraviolet (UV) light producing lamps Tubular lamp wells used to protect ultraviolet light producing lamps mounted in a photochemical reactor are continuously cleaned, while a reaction is being carried out, by containing a large number of small, chemically inert plastic pellets in the reactio... | 04/29/1997 |
| 5586051 | Chemical reactor feed control In a process for manufacture of a chemical product, a reactive hydrocarbon feedstream, which varies in composition of the reactive component, is combined with a compatible but unreactive hydrocarbon feedstream to form a blended hydrocarbon stream which is... | 12/17/1996 |
| 5569914 | Method for measuring height of fill in a production tubing/casing annulus The location in a wellbore of the top of a quantity of fill material which is sufficient to restrict flow in a tubing/casing annulus at a location deep in a well is determined by dropping a radioactive source through the annulus so that it falls to the to... | 10/29/1996 |
| 5565175 | Apparatus and method for producing ethylene polymer An apparatus and method for producing ethylene polymer are provided which employ a conduit in the form of a closed loop (i.e. loop reactor) for receiving a flow of a monomer which includes ethylene, a polymerization catalyst and a diluent therethrough for... | 10/15/1996 |
| 5565174 | Apparatus for controlling removal of polymerization reaction effluent In withdrawing a reaction slurry from a polymerization reactor wherein solid particles in the slurry must be maintained in solution to prevent solidification, a redundant effluent line is provided to remove the slurry in the event the primary line becomes... | 10/15/1996 |
| 5518606 | Method for treating pitch Solid debris of rocks and scrap metal, etc., which are embedded in recoverable petroleum material such as solid or semisolid pitch or tar deposits, are separated from the petroleum material by a high pressure spray carried out in a closed separation vesse... | 05/21/1996 |
| 5511615 | Method and apparatus for in-situ borehole stress determination A borehole technique for in-situ determination of principal stresses operating in a plane normal to the borehole includes using a downhole jack to independently initiate three spaced apart fractures in a subterranean formation, measuring the breakdown pre... | 04/30/1996 |
| 5464504 | Inferential correction of composition for a distillation analyzer In a distillation column, which for control purposes cannot tolerate the inherent dead time between analysis of consecutive samples in chromatograph analyzers, the chromatograph output is frequently corrected by inferring a dynamic correction based on the... | 11/07/1995 |
| 5455314 | Method for controlling removal of polymerization reaction effluent In withdrawing a reaction slurry from a polymerization reactor wherein solid particles in the slurry must be maintained in solution to prevent solidification, a redundant effluent line is provided to remove the slurry in the event the primary line becomes... | 10/03/1995 |
| 5453958 | Method for locating hydrocarbon reservoirs A method is provided by which the presence, if any, and location of a hydrocarbon reservoir or reservoirs adjacent to a subterranean surface can be determined based on DAD values which correspond to grid points of the surface. DAD values, specifically def... | 09/26/1995 |
| 5447607 | Ether recovery Process equipment is provided for separating ether, alcohol and hydrocarbon components from various etherifications of C4 or C5 isoolefins with an alcohol such as methanol or ethanol, and wherein identical process vessels are utilize... | 09/05/1995 |
| 5419873 | Apparatus for transfer of acid catalyst Apparatus and a method are disclosed for transferring acid catalyst from a transport vehicle where liquid acid is carried under a relatively low vapor pressure level to a process vessel in an alkylation process where liquid acid is contained at a higher p... | 05/30/1995 |
