Exxonmobil Upstream Research Company

Exxonmobil Research and Engineering Company

James Ronald Rigby

Ronald R Bowen

Moses Minta

E Lawrence Kimble

Brandon T Stone

Roby Bearden, Jr

William C Baird, Jr

Daniel Paul Leta

Narasimha-Rao Venkata Bangaru

Jayoung Koo

Michael F Raterman

Bruce T Kelley

Jonathan Martin McConnachie

James Ronald Bielenberg

Richard A Demmin

Douglas Paul Fairchild

Neeraj Srinivas Thirumalai

Chris A Wright

Walter David Vann

Raghavan Ayer

Howard J Freund

Steven Jeffrey Ford

Douglas Wayne Hissong

Glen A Vaughn

Lonny R Kelley

Mark Biegler

Robert E Steele

Hydrocarbon feedstreams are desulfurized using an alkali metal reagent, optionally in the presence of hydrogen. Improved control over reaction conditions can be achieved in part by controlling the particle size of the alkali metal salt and by using multiple desulfurization reactors. The processes herein allow a simple and effective method for removing the majority of coke formed in the alkali metal reagent reactions with the hydrocarbon feedstreams. This makes it cost effective to run such processes at higher severities (which result in higher coke production) thereby resulting in increased amounts of valuable converted hydrocarbon product yields. The process improvements herein may also be used to increase total throughput through a unit due to the ability to effectively manage higher coke content in the reaction products.

Alkali metal hydroprocessing of heavy oils with enhanced removal of coke products

A method for welding and repairing cracks in metal parts is provided by subjecting the metal parts to be welded to friction stir welding and the cracks to be repaired to friction stir processing under conditions sufficient to provide a weld joint or crack repair having a preselected property or set of properties based upon the intended use of the weldment. The FSW and FSP methods are advantageous in joining and repairing metal structures and components in applications for natural gas transportation and storage, oil and gas well completion and production, and oil and gas refinery and chemical plants.

Application of high integrity welding and repair of metal components in oil and gas exploration, production and refining

A process is provided for converting a boil-off stream comprising methane to a liquid having a preselected bubble point temperature. The boil-off stream is pressurized, then cooled, and then expanded to further cool and at least partially liquefy the boil-off stream. The preselected bubble point temperature of the resulting pressurized liquid is obtained by performing at least one of the following steps: before, during, or after the process of liquefying the boil-off stream, removing from the boil-off stream a predetermined amount of one or more components, such as nitrogen, having a vapor pressure greater than the vapor pressure of methane, and before, during, or after the process of liquefying the boil-off stream, adding to the boil-off stream one or more additives having a molecular weight heavier than the molecular weight of methane and having a vapor pressure less than the vapor pressure of methane.

Reliquefaction of boil-off from liquefied natural gas

Systems and methods are provided for delivering pressurized liquefied natural gas to an import terminal equipped with containers and vaporization facilities suitable for conventional LNG.

Unloading pressurized liquefied natural gas into standard liquefied natural gas storage facilities

The invention relates to a process of manufacturing a pressurized multi-component liquid from a pressurized, multi-component stream, such as natural gas, which contains C components and at least one component of C , C , C , or C . The process selectively removes from the multi-component stream one or more of the C components that would be expected to crystallize at the selected temperature and pressure of the pressurized multi-component liquid product and leaves in the multi-component stream at least one C component. The multi-component stream is then liquefied to produce a pressurized liquid substantially free of crystallized C components. The removal of the C components can be by selective fractionation or crystallization.

Process of manufacturing pressurized liquid natural gas containing heavy hydrocarbons

A method is disclosed for loading pressurized liquefied natural gas (PLNG) into a plurality of containers containing pressurized vapor, wherein the containers are loaded in succession. The containers may be onshore or onboard a ship or other ocean transporting vessel. As a first step, the liquefied gas is introduced into the containers, thereby discharging the vapor therefrom. Vapor discharged from the containers is passed to auxiliary storage tanks comprising a first tank and a second tank. Vapor from at least one of the tanks is withdrawn and passed to a vapor utilization means such as a liquefaction plant for liquefaction of the vapor or to an engine or turbine for use of the vapor as fuel. Fluid flow to and from the first and second tanks is regulated to assure that the total flow rate of vapor to the vapor utilization means remains at a relatively constant flow rate.

Method for loading pressurized liquefied natural gas into containers

Process components, containers, and pipes are provided that are constructed from ultra-high strength, low alloy steels containing less than 9 wt % nickel and having tensile strengths greater than 830 MPa (120 ksi) and DBTTs lower than about &minus;73&deg; C. (&minus;100&deg; F.).

Process components, containers, and pipes suitable for containing and transporting cryogenic temperature fluids

Pipeline distribution network systems arc provided for transporting pressurized liquefied natural gas at a pressure of about 1035 kPa (150 psia) to about 7590 kPa (1100 psia) and at a temperature of about &minus;123&deg; C. (&minus;190&deg; F.) to about &minus;62&deg; C. (&minus;80&deg; F.). Pipes and other components of the pipeline distribution network systems are constructed from an ultra-high strength, low alloy steel containing less than 9 wt % nickel and having a tensile strength greater than 830 MPa (120 ksi) and a DBTT lower than about &minus;73&deg; C. (&minus;100&deg; F.).

Pipeline distribution network systems for transportation of liquefied natural gas

A process is disclosed for unloading a plurality of containers having pressurized liquefied gas contained therein. A pressurized displacement gas is fed to a first container or group of containers to discharge the liquefied gas therefrom. The displacement gas is then withdrawn from the first container or group and it is separated into a first vapor stream and a second vapor stream. The first vapor stream is heated and passed to the first container or group. The second vapor stream is fed to a second container or group to discharge liquefied gas therefrom. Communication between the first container or group and the second container or group is severed and the foregoing steps are repeated for all of the containers in succession, with only the last container or group emptied of liquid remaining at the pressure of the displacement gas, and all of the containers at the end of the process except the last container or group being filled with a lower pressure vapor.

Process for unloading pressurized liquefied natural gas from containers

Growing community of inventors

Kingwood, TX, United States of America

James Ronald Rigby