Cheng D Chen

US Patent:

20220236699, Jul 28, 2022

Filed:

Jan 28, 2022

Appl. No.:

17/586846

Inventors:

- San Ramon CA, US
Lauren A. FLORES - Katy TX, US
Cheng CHEN - Sugar Land TX, US

Assignee:

CHEVRON U.S.A. INC. - San Ramon CA

International Classification:

G05B 13/04
C02F 1/00

Abstract:

Embodiments of modelling a fluid treatment system are provided herein. One embodiment comprises obtaining synthetic data for a fluid treatment system from a data store. The fluid treatment system comprises a membrane and the fluid treatment system is configured to receive a stream of fluid for treatment. The embodiment comprises training a machine learning pressure prediction model using the synthetic data to predict a pressure for the membrane of the fluid treatment system. The trained pressure prediction model is combinable with an operator training simulator (OTS) model to update the OTS model to improve accuracy of simulation pressure output from the OTS model.

US Patent:

20190299162, Oct 3, 2019

Filed:

Mar 29, 2018

Appl. No.:

15/940401

Inventors:

- San Ramon CA, US
Cheng Chen - Richmond TX, US

International Classification:

B01D 61/02
B01D 61/04
B01D 61/08
C02F 1/44
E21B 43/40

Abstract:

A method for treating water high in sulfate includes passing the water at a temperature of 10 C. to 45 C. through a nanofiltration membrane module and a reverse osmosis membrane module in series such that the retentate stream from the nanofiltration membrane module is fed to the reverse osmosis membrane module. A first permeate stream from the nanofiltration membrane module has at least 90% lower sulfate content than the feed stream. A second permeate stream from the reverse osmosis membrane module has at least 95% lower sulfate content than the retentate stream from the nanofiltration membrane module. The first and second permeate streams are combined to form a treated stream containing less than 40 ppm sulfate. A system including the nanofiltration and reverse osmosis membrane modules in series is also disclosed.

US Patent:

20180028978, Feb 1, 2018

Filed:

Oct 12, 2017

Appl. No.:

15/730797

Inventors:

- San Ramon CA, US
Cheng Chen - Richmond TX, US

International Classification:

B01D 61/58
E21B 41/00
B01D 61/14
C02F 9/00
B01D 61/02

Abstract:

Produced water from a crude oil or natural gas production process is purified using a membrane purification system for petroleum production, agricultural, commercial and domestic uses. The produced water is pretreated to remove, at least, particulates and oil from the produced water. The minimally pretreated water is then purified in a membrane purification system, that is operated at conditions such that membrane scaling is reduced or prevented. In particular, the membrane purification system is operated to maintain the turbidity of clarified water feed to the system or intermediate aqueous streams that are cascading through the membrane purification system. Ensuring that the turbidity of the reject streams generated in the membrane system are useful in achieving long membrane operating life.

US Patent:

20170275555, Sep 28, 2017

Filed:

Jun 17, 2015

Appl. No.:

15/318733

Inventors:

- Houston TX, US
Hong GAO - Katy TX, US
Cheng CHEN - Katy TX, US
Coleen Anne CHIN - Houston TX, US
Brian Lee PAPKE - Sugar Land TX, US

International Classification:

C10M 139/00
C10M 133/08
C10M 129/76

Abstract:

A lubricating composition for use in the crankcase of an engine comprising (i) a base oil; (ii) one or more organo-molybdenum compounds at a level sufficient to provide from 100 to 1000 ppmw of molybdenum; and (iii) from 0.2 wt % to 5.0 wt %, by weight of the lubricating composition, of one or more organic polymeric friction reducing additives, wherein the one or more organic polymeric friction reducing additives has a molecular weight ranging from 1000 to 30000 Daltons and is the reaction product of: a) a hydrophobic polymeric sub unit which comprises a hydrophobic polymer selected from polyolefins, polyacrylics and polystyrenyls; b) a hydrophilic polymeric sub unit which comprises a hydrophilic polymer selected from polyethers, polyesters, polyamides; c) optionally at least one backbone moiety capable of linking together polymeric sub units; and d) optionally a chain terminating group. The lubricating composition provides improvements in terms of reduced friction and wear, in addition to improved fuel economy performance.

US Patent:

20170081951, Mar 23, 2017

Filed:

May 19, 2014

Appl. No.:

15/126404

Inventors:

- Houston TX, US
Jesse Clay Hampton - Conroe TX, US
Cheng Chen - Cypress TX, US

International Classification:

E21B 43/26
E21B 43/16
E21B 43/267

Abstract:

A method and system for inducing secondary orthogonal fractures in an underground formation by introducing a proppant carrying fluid into a hydraulic fracture in an underground formation at high pressure is provided. The pressure of the proppant carrying fluid is lowered at a rate allowing the fluid to exit the formation while the proppant remains in place within the fractures. The pressure of the fluid is then rapidly reduced, creating fractures orthogonal to the surface of existing fractures by pushing remained proppant against hydraulic fractures walls. The orthogonal fractures can be opened with high pressure fluid and propped. In this way, the portion of the formation in fluid flow communication with the wellbore is increased.

US Patent:

20150376033, Dec 31, 2015

Filed:

Aug 28, 2015

Appl. No.:

14/838421

Inventors:

- San Ramon CA, US
Ronald David Hobbs - Wharton TX, US
Cheng Chen - Richmond TX, US
Sumitra Subrahmanyan - Houston TX, US

International Classification:

C02F 1/44
C02F 1/52

Abstract:

Produced water from a crude oil or natural gas production process is purified using a membrane purification system for petroleum production, agricultural, commercial and domestic uses. The produced water is pretreated to remove, at least, particulates and oil from the produced water. The minimally pretreated water is then purified in a membrane purification system that is operated at conditions such that membrane scaling is reduced or prevented. In particular, the membrane purification system is operated to maintain the turbidity of clarified water feed to the system or intermediate aqueous streams that are cascading through the membrane purification system. Ensuring that the turbidity of the reject streams generated in the membrane system are useful in achieving long membrane operating life.

US Patent:

20150045270, Feb 12, 2015

Filed:

Apr 5, 2012

Appl. No.:

14/009121

Inventors:

Paul Francis Bastien - Katy TX, US
Cheng Chen - Houston TX, US
Brian Lee Papke - Sugar Land TX, US

International Classification:

C10M 141/10

US Classification:

508364

Abstract:

A lubricant composition comprising: a fully formulated commercial lubricating oil which comprises from 0.01 to 2.0 percent by weight of an oil soluble organo-molybdenum friction modifier and at least 0.1 percent by weight active sulfur of a surface active sulfur donor component is effective in preventing the removal of DLC coatings while at the same time allowing the beneficial friction-reducing effects from the molybdenum friction modifier to occur.