David T Larkin

US Patent:

20220260311, Aug 18, 2022

Filed:

May 3, 2022

Appl. No.:

17/735909

Inventors:

- Houston TX, US
Paul R. DAVIES - Houston TX, US
Qi MA - Houston TX, US
David W. LARKIN - Houston TX, US
Michael J. CALDERON - Houston TX, US

International Classification:

F25J 3/02
C10L 3/10
C10G 5/06
C10G 5/04

Abstract:

The invention relates to a system, method and apparatus for removing heavies from natural gas. Natural gas and an external rich reflux gas feed are processed in a single column refluxed absorber. A bottoms stream is routed to a first heat exchanger and then to a stabilizer column where an overhead stream from the stabilizer column is routed through a condenser for partial separation into an overhead stream. A rich solvent may be introduced to the stabilizer column. The overhead stream is routed through a condenser for partial separation into a stabilizer reflux and a second overhead stream lights. The second overhead stream lights is routed to a heat exchanger and then routed to a partial condenser where the stream is separated into a heavies rich reflux stream, a distillate stream and heavies treated natural gas stream. The rich reflux is routed through a heat exchanger and the rich reflux is pumped to the single column refluxed absorber to be introduced into the single column refluxed absorber as the external rich reflux gas feed.

US Patent:

20210108147, Apr 15, 2021

Filed:

Dec 18, 2020

Appl. No.:

17/247622

Inventors:

- Houston TX, US
Michael J. CALDERON - Houston TX, US
Dale L. EMBRY - Houston TX, US
David W. LARKIN - Houston TX, US
Qi MA - Houston TX, US

International Classification:

C10G 53/02
C10G 7/00
B01D 3/14
B01D 3/06
B01D 1/28

Abstract:

The invention relates to various nonlimiting embodiments that include methods, apparatuses or systems for processing natural gas comprising a heavies removal column processing natural gas and light oil reflux. The overhead stream goes to heavies treated natural gas storage. The heavies removal column reboiler bottoms stream product is input to a debutanizer column. The debutanizer column overhead lights are input to a flash drum where the bottoms is pumped through a heat exchanger as a light oil reflux input to the heavies removal column, while the debutanizer reboiler bottoms product is stored as stabilized condensate. Alternatively, debutanizer column overhead lights are sent to heavies treated gas storage and the bottoms stream product goes to a depentanizer column, the overhead lights are pumped through a heat exchanger as a light oil reflux input to the heavies removal column, while the depentanizer reboiler bottoms product is stabilized condensate.

US Patent:

20180273858, Sep 27, 2018

Filed:

Mar 20, 2018

Appl. No.:

15/926099

Inventors:

- Houston TX, US
Michael J. CALDERON - Houston TX, US
Dale L. EMBRY - Houston TX, US
David W. LARKIN - Houston TX, US
Qi MA - Houston TX, US

International Classification:

C10G 53/02
C10G 7/00
B01D 3/14
B01D 3/06

Abstract:

The invention relates to various nonlimiting embodiments that include methods, apparatuses or systems for processing natural gas comprising a heavies removal column processing natural gas and light oil reflux. The overhead stream goes to heavies treated natural gas storage. The heavies removal column reboiler bottoms stream product is input to a debutanizer column. The debutanizer column overhead lights are input to a flash drum where the bottoms is pumped through a heat exchanger as a light oil reflux input to the heavies removal column, while the debutanizer reboiler bottoms product is stored as stabilized condensate. Alternatively, debutanizer column overhead lights are sent to heavies treated gas storage and the bottoms stream product goes to a depentanizer column, the overhead lights are pumped through a heat exchanger as a light oil reflux input to the heavies removal column, while the depentanizer reboiler bottoms product is stabilized condensate.

US Patent:

20180266757, Sep 20, 2018

Filed:

Mar 20, 2018

Appl. No.:

15/925873

Inventors:

- Houston TX, US
Paul R. DAVIES - Houston TX, US
Qi MA - Houston TX, US
David W. LARKIN - Houston TX, US
Michael J. CALDERON - Houston TX, US

International Classification:

F25J 3/02

Abstract:

The invention relates to a system, method and apparatus for removing heavies from natural gas. Natural gas and an external rich reflux gas feed are processed in a single column refluxed absorber. A bottoms stream is routed to a first heat exchanger and then to a stabilizer column where an overhead stream from the stabilizer column is routed through a condenser for partial separation into an overhead stream. A rich solvent may be introduced to the stabilizer column. The overhead stream is routed through a condenser for partial separation into a stabilizer reflux and a second overhead stream lights. The second overhead stream lights is routed to a heat exchanger and then routed to a partial condenser where the stream is separated into a heavies rich reflux stream, a distillate stream and heavies treated natural gas stream. The rich reflux is routed through a heat exchanger and the rich reflux is pumped to the single column refluxed absorber to be introduced into the single column refluxed absorber as the external rich reflux gas feed.

US Patent:

20150308231, Oct 29, 2015

Filed:

Apr 9, 2015

Appl. No.:

14/682191

Inventors:

- Houston TX, US
David W. LARKIN - Houston TX, US

International Classification:

E21B 36/00
E21B 33/068
E21B 43/24

Abstract:

Methods and systems generate steam for oil recovery operations. The systems may limit feedwater pretreatment expenses and fouling issues. In the method, dirty feedwater introduced into a vessel containing a hot liquid hydrocarbon, e.g., an already hot produced hydrocarbon, contacts the hydrocarbon and is vaporized into steam. The steam collects in a top of the vessel and may be conveyed to the wellhead for downhole injection. The hydrocarbon remains heated by a closed circulation loop passing back and forth through a lower half of the vessel containing the hydrocarbon. The fluid in this loop remains isolated from contaminates in the water to limit fouling in tubes, which form the loop and can employ normal metallurgy to save on capital costs. The hydrocarbon can be treated as needed to remove accumulating salts and/or entrained water and recycled.