公开(公告)号：US11898094B2

公开(公告)日：2024-02-13

申请号：US17104514

申请日：2020-11-25

Applicant: Chevron U.S.A. INC.

Inventor： Nabijan Nizamidin ,  Harold C. Linnemeyer ,  Timothy P. Theriot ,  Gojko Matovic ,  Seung Han ,  Do Hoon Kim ,  Kerry K. Spilker

IPC: C09K8/62 ,  C09K8/60 ,  G01N11/04 ,  E21B43/26 ,  E21B47/00 ,  G06F30/28

CPC classification number: C09K8/62 ,  C09K8/602 ,  E21B43/26 ,  E21B47/00 ,  G01N11/04 ,  G06F30/28 ,  C09K2208/08 ,  C09K2208/28

Abstract: The present invention relates generally to systems and processes for improved drag reduction estimation and measurement and more specifically to portable drag reduction analyzers and processes for upscaling drag reduction data for a variety of field applications. A drag reduction parameter ΔB for the fluid mixture is used for determining drag reduction for a fluid mixture in an oil field or pipeline operation.

公开(公告)号：US12215276B2

公开(公告)日：2025-02-04

申请号：US18160710

申请日：2023-01-27

Applicant: CHEVRON U.S.A. INC.

Inventor： Sujeewa S. Palayangoda ,  Kerry Kennedy Spilker ,  Sumitra Subrahmanyan ,  Gayani W. Pinnawala ,  Sophany Thach ,  Gregory A. Winslow ,  Dennis Arun Alexis ,  Harold Charles Linnemeyer ,  Timothy P. Theriot ,  Les Leszek Jackowski ,  Francesca Cibotti

IPC: C09K8/588 ,  C09K8/03 ,  E21B21/06 ,  E21B43/38

Abstract: Described herein are methods of treating fluid including hydrocarbons, water, and polymer being produced from a hydrocarbon-bearing formation. The methods include adding a concentration of a viscosity reducer to the fluid to degrade the polymer present in the fluid and adding a concentration of a neutralizer to the fluid to neutralize the viscosity reducer in the fluid. The viscosity reducer is buffered at a pH of 7 or less. The addition of the concentration of the viscosity reducer is in a sufficient quantity to allow for complete chemical degradation of the polymer prior to the addition of the concentration of the neutralizer in the fluid such that excess viscosity reducer is present in the fluid.

公开(公告)号：US11834606B2

公开(公告)日：2023-12-05

申请号：US17581392

申请日：2022-01-21

Applicant: CHEVRON U.S.A. INC.

Inventor： Sumitra Subrahmanyan ,  Gayani W. Pinnawala ,  Sophany Thach ,  Gregory A. Winslow ,  Dennis A. Alexis ,  Harold C. Linnemeyer ,  Timothy P. Theriot ,  Les Leszek Jackowski ,  Francesca Cibotti

IPC: C09K8/588 ,  E21B21/06 ,  C09K8/03 ,  E21B43/38

CPC classification number: C09K8/588 ,  C09K8/032 ,  E21B21/068 ,  E21B43/385 ,  C09K2208/26 ,  C09K2208/28

Abstract: Embodiments of treating fluid comprising hydrocarbons, water, and polymer being produced from a hydrocarbon-bearing formation are provided. One embodiment comprises adding a concentration of a viscosity reducer to the fluid to degrade the polymer present in the fluid and adding a concentration of a neutralizer to the fluid to neutralize the viscosity reducer in the fluid. The addition of the concentration of the viscosity reducer is in a sufficient quantity to allow for complete chemical degradation of the polymer prior to the addition of the concentration of the neutralizer in the fluid such that excess viscosity reducer is present in the fluid. The addition of the concentration of the neutralizer is sufficiently upstream of any surface fluid processing equipment to allow for complete neutralization of the excess viscosity reducer such that excess neutralizer is present in the fluid prior to the fluid reaching any of the surface fluid processing equipment.

公开(公告)号：US11591893B2

公开(公告)日：2023-02-28

申请号：US17287734

申请日：2019-10-22

Applicant: CHEVRON U.S.A. INC.

Inventor： Sujeewa S. Palayangoda ,  Kerry Kennedy Spilker ,  Sumitra Subrahmanyan ,  Gayani W. Pinnawala ,  Sophany Thach ,  Gregory A. Winslow ,  Dennis Arun Alexis ,  Harold Charles Linnemeyer ,  Timothy P. Theriot ,  Les Leszek Jackowski ,  Francesca Cibotti

IPC: E21B43/38 ,  C09K8/588 ,  E21B21/06 ,  C09K8/03

Abstract: Described herein are methods of treating fluid comprising hydrocarbons, water, and polymer being produced from a hydrocarbon-bearing formation are provided. The method can include adding a concentration of a viscosity reducer to the fluid to degrade the polymer present in the fluid and adding a concentration of a neutralizer to the fluid to neutralize the viscosity reducer in the fluid. The viscosity reducer is buffered at a pH of 7 or less (e.g., at a pH of from 2 to 7, such as at a pH of from 3.5 to 7, or at a pH of from 5 to 7). The addition of the concentration of the viscosity reducer is in a sufficient quantity to allow for complete chemical degradation of the polymer prior to the addition of the concentration of the neutralizer in the fluid such that excess viscosity reducer is present in the fluid. The addition of the concentration of the neutralizer is sufficiently upstream of any surface fluid processing equipment to allow for complete neutralization of the excess viscosity reducer such that excess neutralizer is present in the fluid prior to the fluid reaching any of the surface fluid processing equipment.

公开(公告)号：US20220145157A1

公开(公告)日：2022-05-12

申请号：US17581392

申请日：2022-01-21

Applicant: CHEVRON U.S.A. INC.

Inventor： Sumitra Subrahmanyan ,  Gayani W. Pinnawala ,  Sophany Thach ,  Gregory A. Winslow ,  Dennis A. Alexis ,  Harold C. Linnemeyer ,  Timothy P. Theriot ,  Les Leszek Jackowski ,  Francesca Cibotti

IPC: C09K8/03

Abstract: Embodiments of treating fluid comprising hydrocarbons, water, and polymer being produced from a hydrocarbon-bearing formation are provided. One embodiment comprises adding a concentration of a viscosity reducer to the fluid to degrade the polymer present in the fluid and adding a concentration of a neutralizer to the fluid to neutralize the viscosity reducer in the fluid. The addition of the concentration of the viscosity reducer is in a sufficient quantity to allow for complete chemical degradation of the polymer prior to the addition of the concentration of the neutralizer in the fluid such that excess viscosity reducer is present in the fluid. The addition of the concentration of the neutralizer is sufficiently upstream of any surface fluid processing equipment to allow for complete neutralization of the excess viscosity reducer such that excess neutralizer is present in the fluid prior to the fluid reaching any of the surface fluid processing equipment.

公开(公告)号：US20210198557A1

公开(公告)日：2021-07-01

申请号：US17104514

申请日：2020-11-25

Applicant: Chevron U.S.A. INC.

Inventor： NABIJAN NIZAMIDIN ,  Harold C. Linnemeyer ,  Timothy P. Theriot ,  Gojko Matovic ,  Seung Han ,  Do Hoon Kim ,  Kerry K. Spilker

IPC: C09K8/62 ,  C09K8/60 ,  G01N11/04 ,  G06F30/28 ,  E21B43/26 ,  E21B47/00

Abstract: The present invention relates generally to systems and processes for improved drag reduction estimation and measurement and more specifically to portable drag reduction analyzers and processes for upscaling drag reduction data for a variety of field applications. A drag reduction parameter ΔB for the fluid mixture is used for determining drag reduction for a fluid mixture in an oil field or pipeline operation.