Patents Assigned to Conoco Inc.
  • Publication number: 20030066240
    Abstract: Preferred embodiments of the present invention generate a synthesis gas with a molar ratio of hydrogen to carbon monoxide of approximately 2:1 required for Fischer-Tropsch synthesis. Additional hydrogen produced in the steam reforming of methane beyond the requirements for the Fischer-Tropsch reaction is separated from the product gases of the reformer by the use of a hydrogen permeable membrane. Air is passed over the outside of the tube. As the hydrogen contacts the air, it is combusted with oxygen in the air to form water and release the heat necessary to drive the steam reforming reaction.
    Type: Application
    Filed: June 11, 2002
    Publication date: April 10, 2003
    Applicant: Conoco Inc.
    Inventor: Alfred E. Keller
  • Publication number: 20030065043
    Abstract: A process is disclosed for producing hydrocarbons. The process involves contacting a feed stream comprising hydrogen and carbon monoxide with a catalyst in a reaction zone maintained at conversion-promoting conditions effective to produce an effluent stream comprising hydrocarbons. In accordance with this invention, the catalyst used in the process includes at least a Fischer-Tropsch metal and a promoter selected from the group consisting of molybdenum, tin, gallium, and zinc. The Fischer-Tropsch metal preferably includes cobalt. The catalyst may also include a support material selected from the group including silica, titania, titania/alumina, zirconia, alumina, silica-alumina, aluminum fluoride, and fluorided aluminas.
    Type: Application
    Filed: August 29, 2002
    Publication date: April 3, 2003
    Applicant: Conoco Inc.
    Inventors: Olga P. Ionkina, Kamel M. Makar, Leo E. Manzer, Munirpallam A. Subramanian
  • Publication number: 20030060981
    Abstract: The present invention is a method for determining a parameter of interest of a region of interest of the earth using tensor data. At least one component of potential fields data is measured at a plurality of locations over a region of interest including a subterranean formation of interest. The potential fields data are selected from magnetic data and gravity data. An initial geophysical model is determined for the region including the subterranean formation of interest. For the model, geophysical tensor data is updated using a forward model at a plurality of locations using an interior method for constrained optimization. A difference between the estimated model value and the measured value of the potential field measurements are determined at the plurality of locations. Based on the this difference the geophysical model is updated. The model is iteratively updated and compared to the measured data until the differences reach an acceptable level and the parameter of interest has been determined.
    Type: Application
    Filed: September 6, 2002
    Publication date: March 27, 2003
    Applicant: Conoco Inc.
    Inventors: Partha Sarathi Routh, Jerry Lee Kisabeth, Gregory Joseph Jorgensen
  • Patent number: 6537349
    Abstract: A subsea passive flash gas compression system that includes a first separator that removes high pressure flash gas from a hydrocarbon product, a second separator that removes low pressure flash gas from the hydrocarbon product after the high pressure flash gas has been removed, and an ejector. The ejector includes a high pressure input that is coupled to a high pressure flash gas output of the first separator. The ejector also includes a low pressure input that is coupled to a low pressure flash gas output of the second separator. An output of the ejector is coupled to an outlet pipeline that extends from proximate the sea bottom to the sea surface.
    Type: Grant
    Filed: March 27, 2001
    Date of Patent: March 25, 2003
    Assignee: Conoco, Inc.
    Inventors: Michael S. Choi, James N. Collins
  • Publication number: 20030050349
    Abstract: The present invention relates to a method for removing a sulfur containing catalyst poison from a feedstock. Benefits from removing catalyst poisoning sulfur compounds in a feedstock include upgrading the quality of the various petroleum fractions and prolonging the life of the catalyst. A preferred embodiment of the present invention includes adding a sacrificial metal to a Fischer-Tropsch reactor. The role of the sacrificial metal is adsorption of the sulfur-containing species that may deactivate or poison the catalyst.
    Type: Application
    Filed: May 24, 2002
    Publication date: March 13, 2003
    Applicant: Conoco Inc.
    Inventor: Joe D. Allison
  • Publication number: 20030045423
    Abstract: A family of supported hexagonal phase mixed metal oxide catalysts are disclosed that have the general formula M2.5LnRh6O13 (expressed as atomic ratios), wherein M refers to Group II elements such as Mg, Ca, Ba, Sr and Be or a Group VIII transition metal that can exist in a +2 oxidation state, such as Ti, V, Mn, Fe, Co, Ni, Cu, Zn, Nb, Pd, Cd and Ta. Ln refers to the rare earth lanthanide group of elements, such as La, Yb, Sm and Ce. This family of catalysts demonstrate unexpected activity for efficiently catalyzing the net partial oxidation of methane in a short contact time reactor, with high selectivities for H2 product.
    Type: Application
    Filed: June 4, 2002
    Publication date: March 6, 2003
    Applicant: Conoco Inc.
    Inventors: Hasan Dindi, William H. Manogue, Norman Herron, Tianyan Niu, Daxiang Wang, David M. Minahan
  • Publication number: 20030040655
    Abstract: A catalyst useful for the production of olefins from alkanes via oxidative dehydrogenation (ODH) is disclosed. The catalyst includes an oxide selected from the group containing alumina, zirconia, titania, yttria, silica, niobia, and vanadia. The catalyst does not contain any unoxidized metals; it is activated by higher preheat temperatures. As a result, similar conversions are achieved at a considerably lower cost.
    Type: Application
    Filed: March 26, 2002
    Publication date: February 27, 2003
    Applicant: Conoco Inc.
    Inventors: Lisa M. Budin, Larry M. Meyer
  • Publication number: 20030037529
    Abstract: The present invention includes a nontwisted composite tether comprising one or more composite rods encased in a jacket and a method for manufacturing same. A portion of the rods may be bundled into one or more strands, provided however that the rods comprising the strands are not twisted into twisted strands in the assembled nontwisted tether. Such untwisted strands, if any, additionally are not twisted relative to each other. Temporary and/or permanent buoyancy may be to the tether. The present invention includes methods for preparing, transporting, and installing a composite tether on a floating platform. The tether, preferably assembled at a waterfront, is launched into the water and towed to an offshore installation site, where the tether is upended and connected via a bottom end connector on the tether to an anchor foundation in the seabed and connected a top end connector on the tether to the floating platform.
    Type: Application
    Filed: April 24, 2002
    Publication date: February 27, 2003
    Applicant: Conoco Inc.
    Inventors: Shaddy Y. Hanna, Mamdouh M. Salama
  • Publication number: 20030027875
    Abstract: A gas-agitated multiphase reactor system that is effective for enabling maximum reactor productivity or minimizing reactor volume comprising at least two stages with or without recycle, wherein inlet gas superficial velocity is at least 20 cm/sec at Fischer-Tropsch synthesis, yielding a total syngas conversion of greater than about 90%, while syngas conversion in each reactor is less than 60%. More specifically, the total reactor volume is held to a minimum such that minimum reactor volume is less than 0.02 cubic meters total reactor volume/(kg C5+/hr production).
    Type: Application
    Filed: July 25, 2002
    Publication date: February 6, 2003
    Applicant: Conoco Inc.
    Inventors: Jianping Zhang, Harold A. Wright
  • Publication number: 20030027874
    Abstract: A catalyst and process for producing hydrocarbons using the catalyst is provided. The process involves contacting a feed stream comprising hydrogen and carbon monoxide with the catalyst in a reaction zone maintained at conversion-promoting conditions effective to produce an effluent stream comprising hydrocarbons. In accordance with this invention the catalyst used in the process includes at least one catalytic metal for Fischer-Tropsch reactions, preferably cobalt. The catalyst further includes a structural component, preferably a support, that includes a metal selected from the group consisting of oxides of Group 2 metals, Group 3 metals, Group 6 metals, Group 8 metals, Group 12 metals, Group 15 metals, and combinations thereof, preferably as the oxide.
    Type: Application
    Filed: June 27, 2002
    Publication date: February 6, 2003
    Applicant: Conoco Inc.
    Inventors: Norman Herron, Kostantinos Kourtakis, Munirpallam A. Subramanian, Olga Ionkina, Nithya Srinivasan
  • Publication number: 20030022949
    Abstract: A Fischer-Tropsch catalyst comprising a catalytically active first metal selected from the group consisting of at least one metal selected from the group consisting of iron, nickel, cobalt, chromium, and mixtures thereof, at least one second metal selected from the group consisting of silver, iron, zinc, copper, platinum, zirconium and combinations thereof; and a matrix structure comprising a polymer selected from the group consisting of polyacrylates and polymethacrylates. The first and second metals are incorporated into the polymer.
    Type: Application
    Filed: September 24, 2002
    Publication date: January 30, 2003
    Applicant: Conoco Inc.
    Inventors: Stephan Schwarz, Sergej A. Maslov
  • Publication number: 20030018088
    Abstract: A process is disclosed for the hydrogenation of carbon monoxide. The process involves contacting a feed stream comprising hydrogen and carbon monoxide with a catalyst in a reaction zone maintained at conversion-promoting conditions effective to produce an effluent stream, preferably comprising hydrocarbons. The catalyst used in the process is in the form of a sponge. The process is preferably adapted to produce hydrocarbons suitable for the production of diesel fuel. The catalyst used in the process includes at least one catalytic metal for Fischer-Tropsch reactions, preferably cobalt. Preferably the catalyst further includes at least one promoter suitable for the Fischer-Tropsch reaction, such as at least one element selected from among Groups 2-15 of the Periodic Table, preferably at lease one of chromium, iron, molybdenum, nickel, palladium, platinum, rhenium, rhodium, ruthenium, and combinations thereof.
    Type: Application
    Filed: February 28, 2002
    Publication date: January 23, 2003
    Applicant: CONOCO INC.
    Inventors: Ajoy P. Raje, Theodore A. Koch, Sourav Kumar Sengupta, Mark Jay Harper, Gloria I. Straguzzi, Hasan Dindi
  • Publication number: 20030012711
    Abstract: An apparatus and method is disclosed for producing hydrocarbons according to the Fischer-Tropsch process. The apparatus comprises a catalytic distillation reactor where reactants are fed into the catalytic distillation reactor to undergo catalytic reaction to form hydrocarbons. Physical separation of the unreacted materials and products occurs simultaneously in the catalytic distillation reactor. The catalytic distillation reactor is divided into reaction chambers so as to optimize control of the reaction and the distribution of hydrocarbon products. A monolith, such as a foam monolith or a honeycomb monolith, preferably a honeycomb monolith, is disposed with said reaction chamber serves both as catalyst support and as distillation packing material. A honeycomb monolith preferably includes channels having an axis disposed at a nonzero angle with respect to the axis of a reaction chamber containing the honeycomb monolith.
    Type: Application
    Filed: May 16, 2002
    Publication date: January 16, 2003
    Applicant: Conoco Inc.
    Inventors: Todd H. Harkins, Kenneth M. York, Joe D. Allison, Harold A. Wright
  • Publication number: 20030008929
    Abstract: A method a making a catalyst, preferably a Fischer-Tropsch catalyst, includes the use of a surfactant. The surfactant is preferably a non-ionic surfactant, or alternatively, a cationic surfactant. The catalyst includes support material and catalyst material. The catalyst material preferably includes at least one Fischer-Tropsch metal, more preferably cobalt. The surfactant is preferably added to a solution containing a catalyst material in an amount sufficient to improve a measure of the activity of a catalyst containing the catalyst material, such as the CO conversion, the methane selectivity, the C5+ productivity, or catalyst life. A method for producing hydrocarbons includes contacting a catalyst made as described above with hydrogen and carbon monoxide.
    Type: Application
    Filed: May 31, 2002
    Publication date: January 9, 2003
    Applicant: Conoco Inc.
    Inventor: Joe D. Allison
  • Publication number: 20030005698
    Abstract: A system for vaporizing liquefied natural gas (LNG) utilizes the residual cooling capacity of LNG to condense the working fluid of a power producing work producing cycle and chills liquids that are used in a direct-contact heat transfer system to cool air. The cold air is used to supply air to a combustion gas turbine operating in conjunction with a combined cycle power plant. Power is produced from both the work producing cycle and the combined cycle power plant and the chilling of the intake air to the gas turbine increases the output capacity of the combined cycle power plant.
    Type: Application
    Filed: May 30, 2002
    Publication date: January 9, 2003
    Applicant: Conoco Inc.
    Inventor: Arnold P. Keller
  • Publication number: 20030004817
    Abstract: A medium having a plurality of computer readable files relating to geophysical seismic data recorded thereon. The files include a map display having multiple levels of geographic detail and including a plurality of surface seismic data lines. A plurality of compressed seismic data files is also included, each file producing a corresponding geophysical display when its corresponding surface seismic data line is selected. The files also include a plurality of references to a plurality of full seismic data files. Each of the compressed seismic data files has less information content than its corresponding full seismic data file.
    Type: Application
    Filed: June 27, 2001
    Publication date: January 2, 2003
    Applicant: CONOCO INC
    Inventor: Bobby Joe Caine
  • Publication number: 20030004648
    Abstract: A method of determination of fluid pressures in a subsurface region of the earth uses seismic velocities and calibrations relating the seismic velocities to the effective stress on the subsurface sediments. The seismic velocities may be keyed to defined seismic horizons and may be obtained from many methods, including velocity spectra, post-stack inversion, pre-stack inversion, VSP or tomography. Overburden stresses may be obtained from density logs, relations between density and velocity, or from inversion of potential fields data. The seismic data may be P-P, P-S, or S-S data. The calibrations may be predetermined or may be derived from well information including well logs and well pressure measurements. The calibrations may also include the effect of unloading. The determined pressures may be used in the analysis of fluid flow in reservoirs, basin and prospect modeling and in fault integrity analysis.
    Type: Application
    Filed: August 21, 2002
    Publication date: January 2, 2003
    Applicant: Conoco Inc.
    Inventors: Alan R. Huffman, Robert Lankston, Ernest C. Onyia, Richard Wayne Lahann, David W. Bell
  • Patent number: 6499540
    Abstract: A method for detecting a leak in a drill string valve used when drilling a subsea well. The method comprises measuring a first inlet pressure at a subsea mudlift pump while a subsea mudlift pump and a surface pump are operating and before a well is fully shut-in and measuring a second inlet pressure at the subsea mudlift pump after the mudlift pump and the surface pump are shut down and after the well is fully shut-in. The first and second subsea mudlift pump inlet pressure measurements are then compared, and a check is performed to determine if the subsea mudlift pump inlet pressure has increased by an amount greater than an estimated annular friction pressure.
    Type: Grant
    Filed: December 6, 2000
    Date of Patent: December 31, 2002
    Assignees: Conoco, Inc., The Texas A&M University System
    Inventors: Jerome J. Schubert, Carmon H. Alexander, Hans C. Juvkam-Wold, Curtis E. Weddle, III, Jonggeun Choe
  • Patent number: 6502037
    Abstract: A method for modeling geological structures includes obtaining seismic data and using these data to derive an initial density model. Potential fields data is used to update the initial geophysical model by an inversion process using vector or tensor components of gravity and/or magnetic data. In regions having an anomalous density zone, the initial model includes a topographic or bathymetric surface and a 2D or 3D density model including the top of any zones of anomalous density. Potential fields data is then used to derive the lower boundary of the anomalous density zones by using an inversion process. The final density model from the inversion may be further refined using the seismic data in conjunction with the model obtained by inversion of the potential fields data. The model data are integrated two or three dimensions to determine an overburden stress for the subsurface that includes a proper treatment of the anomalous density zone.
    Type: Grant
    Filed: May 30, 2000
    Date of Patent: December 31, 2002
    Assignee: Conoco Inc.
    Inventors: Gregory Joseph Jorgensen, Jerry Lee Kisabeth, Alan Royce Huffman, John B. Sinton, David W. Bell
  • Publication number: 20020198101
    Abstract: Mixed metal carbide catalysts that are active for catalyzing the net partial oxidation of methane to CO and H2 are disclosed, along with their method of making. The preferred catalysts of the invention comprise a mixture of at least two carbided metals that are prepared by the reaction of the metal oxides, alkoxides or nitrates with a hydrocarbon of the formula CnH2n+2 wherein n is an integer from 1 to 4. Optionally, the catalysts include an additional promoter and/or a catalyst support. Preferred catalysts are at least 50 wt % molybdenum, tungsten or chromium, and also contain a second metal selected from the group consisting of molybdenum, tungsten, vanadium, chromium, iron, niobium, tantalum, rhenium, cobalt, copper, tin and bismuth.
    Type: Application
    Filed: August 5, 2002
    Publication date: December 26, 2002
    Applicant: Conoco Inc.
    Inventor: Anne M. Gaffney