US Pat. No. 9,187,696

DELAYED COKING DRUM QUENCH OVERFLOW SYSTEMS AND METHODS

Bechtel Hydrocarbon Techn...

1. A method for removing hydrocarbon particulates from an overflow stream in a delayed coking quench overflow system, which
comprises:
pumping an overflow stream comprising a fluid and hydrocarbon particulates from a coke drum through a filter system;
removing a portion of the hydrocarbon particulates from the overflow stream as the overflow stream is pumped though the filter
system, wherein the filter system removes hydrocarbon particulates from the overflow stream that are as small as about 10-25
microns in size; and

pumping the overflow stream from the filter system through a closed blowdown system, which comprises at least one of a blowdown
condenser and a settling drum.

US Pat. No. 9,206,810

DEFOAMING SYSTEMS AND METHODS IN HYDROCARBON PROCESSES

Bechtel Hydrocarbon Techn...

1. A method for defoaming in a coking process comprising the steps of:
providing a drag reducing agent wherein the drag reducing agent comprises a poly alpha olefin, a poly methacrylate or an ultra
high molecular weight alkane;

introducing the drag reducing agent into the coking process;
providing a plurality of carbon nanoparticles; and
introducing the carbon nanoparticles into the coking process, wherein the amount of carbon nanoparticles is from about 10
parts per million by weight (ppmw) to 2000 ppmw of carbon nanoparticles relative to a coker feed.

US Pat. No. 9,228,135

EFFICIENT METHOD FOR IMPROVED COKER GAS OIL QUALITY

Bechtel Hydrocarbon Techn...

1. A delayed coking process comprising the following steps:
introducing coke drum vapors into a flash zone of a fractioning column of a delayed coking unit;
removing a heavy coker gas oil stream from the fractionating column via a heavy coker gas oil draw in the fractionating column;
withdrawing at least a portion of the heavy coker gas oil stream as an end product:
introducing at least a portion of the heavy coker gas oil stream into the fractionating column; and
introducing a remaining portion of the heavy coker gas oil stream into at least one heat exchanger, wherein upon exiting the
heat exchanger the remaining portion of the heavy coker gas oil stream is divided into a first stream and a second stream.

US Pat. No. 9,556,878

DEFOAMING SYSTEMS AND METHODS IN HYDROCARBON PROCESSES

Bechtel Hydrocarbon Techn...

1. A method for defoaming in a coking process comprising the steps of:
providing a defoaming agent wherein the defoaming agent consists of a plurality of carbon nanoparticles;
introducing the defoaming agent into the coking process;
detecting a presence of foaming in one or more coke drums using a level indicator; and
introducing an effective amount of the defoaming agent into the coking process wherein the effective amount is determined
as comprising an amount of carbon nanoparticles required to substantially inhibit foaming in the one or more coke drums.

US Pat. No. 10,138,425

DELAYED COKE DRUM QUENCH SYSTEMS AND METHODS HAVING REDUCED ATMOSPHERIC EMISSIONS

Bechtel Hydrocarbon Techn...

1. A system for reducing atmospheric emissions of hydrocarbon vapors in a delayed coke drum quench overflow system, which comprises:an overflow drum connected to a blowdown header line for reducing hydrocarbon vapors and producing a vapor overflow remainder and a liquid overflow remainder;
an overflow tank, connected to the overflow drum by a liquid overflow remainder line, for separating at least one of skim oil, water, coke fines, and tank vapor from the liquid overflow remainder;
an overflow drum vapor line in fluid communication with the overflow drum for transmitting the vapor overflow remainder to a steam line; and
a tank vapor line in fluid communication with the overflow tank for transmitting the tank vapor to an overflow ejector, wherein the overflow ejector includes an inlet in fluid communication with the tank vapor line and an outlet in fluid communication with the steam line for reducing the pressure in the overflow tank to 0 psig.

US Pat. No. 9,557,102

SYSTEMS AND METHODS FOR NATURAL GAS LIQUEFACTION CAPACITY AUGMENTATION

Bechtel Hydrocarbon Techn...

1. A supplemental cooling system for chilling a process feed gas, which comprises:
a liquid chiller ejector system;
a steam input line in fluid communication with the liquid chiller ejector system;
a chilled liquid line wherein each end of the chilled liquid line is in fluid communication with the liquid chiller ejector
system; and

a heat exchanger enclosing a portion of a process feed gas line and a portion of the chilled liquid line, wherein the process
feed gas line and the chilled liquid line are positioned in sufficient proximity to each other in the heat exchanger to affect
heat transfer between the process feed gas when the process feed gas passes through the process feed gas line and a chilled
liquid when the chilled liquid passes through the chilled liquid line; wherein the heat exchanger encloses a portion of a
refrigeration intercooler line and a portion of a refrigeration aftercooler line, the refrigeration intercooler line and the
refrigeration aftercooler line each positioned in sufficient proximity to the process feed gas line and the chilled liquid
line in the heat exchanger to affect heat transfer between the process feed gas when the process feed gas passes through the
process feed gas line, the chilled liquid when the chilled liquid passes through the chilled liquid line, a refrigeration
intercooler when the refrigeration intercooler passes through the refrigeration intercooler line and a refrigeration aftercooler
when the refrigeration aftercooler passes through the refrigeration aftercooler line.

US Pat. No. 9,739,283

DEFOAMING SYSTEMS AND METHODS IN HYDROCARBON PROCESSES

Bechtel Hydrocarbon Techn...

1. A method for defoaming in a coking process which comprises:
detecting a presence of foaming in one or more coke drums; and
introducing a defoaming agent into the coking process, wherein the defoaming agent consists of a plurality of carbon nanoparticles.

US Pat. No. 9,623,453

SYSTEMS AND METHODS FOR ON-LINE PIGGING AND SPALLING OF COKER FURNACE OUTLETS

Bechtel Hydrocarbon Techn...

1. A method for on-line pigging in a tube coil for a furnace in a delayed coking system, which comprises:
terminating a process fluid supply flow to the furnace;
introducing high pressurized steam from a first pressurized steam source through the tube coil and a main line, and from a
second pressurized steam source through a second line connected to the main line for forcing any remaining process fluid in
the tube coil and the main line to a closed blowdown system header or a delayed coking drum, the tube coil, the closed blowdown
system header and the delayed coking drum in fluid communication with each other;

isolating a vent, in fluid communication with the second line, from the main line by introducing high pressurized steam from
a third pressurized steam source through the second line to maintain a constant pressure against one side of first and second
closed valves positioned in fluid communication with the vent between the vent and the main line while introducing the high
pressurized steam from the first pressurized steam source and the second pressurized steam source;

terminating the introduction of the high pressurized steam from the first pressurized steam source, the second pressurized
steam source and the third pressurized steam source;

removing steam from the main line through the vent by opening the first and second closed valves between the vent and the
main line;

isolating a drum input line, in fluid communication with the main line, from a portion of the main line by introducing high
pressurized steam from a fourth pressurized steam source through a third line connected to the main line to maintain a constant
pressure against one side of third, fourth and fifth valves in fluid communication with the drum input line, wherein two of
the third, fourth and fifth valves are positioned on the main line between the drum input line and the portion of the main
line, and one of the third, fourth and fifth closed valves is positioned on the third line between the main line and the closed
blowdown system header;

disconnecting the tube coil from the main line and the first pressurized steam source;
connecting the tube coil to a pigging unit after the main line reaches atmospheric pressure; and
introducing water from a water source to the pigging unit for driving a pig through the tube coil.

US Pat. No. 9,511,396

SYSTEMS AND METHODS FOR ON-LINE PIGGING AND SPALLING OF COKER FURNACE OUTLETS

Bechtel Hydrocarbon Techn...

1. A system for on-line pigging of a tube coil for a furnace being in a delayed coking system, which comprises:
a first pressurized steam source in fluid communication with the tube coil at a tube coil first end;
a main line in fluid communication with the tube coil at a tube coil second end and in fluid communication with an additional
drum input line, the main line having a first isolation valve between the tube coil second end and the additional drum input
line, the main line having a second isolation valve between the first isolation valve and the additional drum input line,
the first isolation valve having a high pressure end positioned toward the second isolation valve and the second isolation
valve having a high pressure end positioned toward the first isolation valve;

a third valve on a second line between a fourth valve and the main line, the fourth valve in fluid communication with the
main line via the second line, the second line in fluid communication with the main line at a point between the tube coil
second end and the first isolation valve;

a second pressurized steam source in fluid communication with the second line at a point between the third valve and the main
line;

a third pressurized steam source in fluid communication with the fourth valve, a fifth valve in fluid communication with the
second line at a point between the fourth valve and the third valve and in fluid communication with a vent;

a third line in fluid communication with the main line between the first isolation valve and the second isolation valve and
in fluid communication with a sixth valve;

a fourth line in fluid communication with the sixth valve and a closed blowdown system header;
a seventh valve between the closed blowdown system header and the sixth valve; and
a fifth pressurized steam source in fluid communication with a eighth valve, the eighth valve in fluid communication with
the fourth line between the sixth valve and the seventh valve.

US Pat. No. 10,022,650

SYSTEMS AND METHODS FOR ENHANCED SEPARATION OF HYDROGEN SULFIDE AND AMMONIA IN A HYDROGEN SULFIDE STRIPPER

Bechtel Hydrocarbon Techn...

1. A method for separating hydrogen sulfide from ammonia, which comprises:introducing a fluid mixture of the hydrogen sulfide and the ammonia into a hydrogen sulfide stripper;
introducing a stripping gas into the hydrogen sulfide stripper, wherein the stripping gas comprises only carbon dioxide and an inert gas selected from the group consisting of Helium, Neon, Argon, Krypton, Xenon and Radon; and
separating most of the hydrogen sulfide from the ammonia in the fluid mixture using the stripping gas in the hydrogen sulfide stripper, which forms a hydrogen sulfide stripper overheads stream and a hydrogen sulfide stripper bottoms stream.

US Pat. No. 9,920,263

SYSTEMS AND METHODS FOR REFINING CORROSIVE CRUDES

Bechtel Hydrocarbon Techn...

1. A method for processing an opportunity crude, comprising:
separating the opportunity crude into a light material and a heavy material;
processing the heavy material using a delayed coker; and
processing only the light material and a reduced crude using a vacuum distillation process to recover a vacuum gas oil from
the reduced crude and to produce a vacuum resid for the delayed coker.

US Pat. No. 9,909,075

SYSTEMS AND METHODS FOR REFINING CORROSIVE CRUDES

Bechtel Hydrocarbon Techn...

1. A system for processing an opportunity crude and a conventional crude, comprising:
an opportunity crude line in fluid communication with at least one of a pre-flash heater and an evaporator column, which separates
the opportunity crude into a light material and a heavy material;

a heavy material line connecting the at least one of the pre-flash heater and the evaporator column with a delayed coker,
which processes the heavy material;

a light material line directly connecting only the at least one of the pre-flash heater and the evaporator column with an
atmospheric crude distillation tower;

a conventional crude line in fluid communication with the atmospheric crude distillation tower, which processes only the light
material and the conventional crude to produce a reduced crude; and

a single reduced crude line connected to the atmospheric crude distillation tower and in fluid communication with only a heater
and a vacuum distillation tower.

US Pat. No. 10,183,728

METHOD FOR CONVERSION OF A VESSEL FOR USE AS FLOATING LIQUEFIED NATURAL GAS FACILITY

Bechtel Hydrocarbon Techn...

1. A method for conversion of a floating vessel having internal cargo holds, which comprise:a) forming a plurality of deck sections;
b) removing the plurality of deck sections from the vessel;
c) removing a deck from each of the plurality of deck sections;
d) rotating each of the plurality of deck sections 180 degrees in vertical plane;
e) removing each lateral support member from each of the plurality of deck sections;
f) attaching a new deck to each of the plurality of deck sections, each new deck having a tank dome opening therethrough;
g) attaching a new support member to each of the plurality of deck sections;
h) attaching an internal second hull to a lower hull side of the vessel;
i) positioning a tank in each of the internal cargo holds, each tank having an upper tank section;
j) rotating further each of the plurality of deck sections 180 degrees in the vertical plane; and
k) attaching each deck section to the vessel, wherein each tank dome opening is aligned with the upper tank section.