公开(公告)号：US10684219B2

公开(公告)日：2020-06-16

申请号：US16175156

申请日：2018-10-30

Applicant: Chevron U.S.A. Inc.

Inventor： Toni Zhang Miao ,  John Bryan Trenery, Jr. ,  Deyuan Kong ,  Roopa Kamath ,  Robert Neil Trotter ,  Cory James McDaniel

IPC: G01N33/24 ,  G01N21/359

Abstract: Hydrocarbons concentrations are determined in drilling cuttings samples by generating a model for predicting hydrocarbons concentrations. Methods include dividing multiple samples removed from drilling fluid into two one set analyzed using a retort, and another set analyzed using a handheld NIR spectrometer to obtain NIR diffuse reflectance data. PLS analysis is used to correlate the retort data with the diffuse reflectance data to generate a calibration model. The model is validated with samples having unknown hydrocarbons concentration. The model is used to predict the hydrocarbons concentration for samples removed from drilling fluid taken from the rig site using the spectrometer to obtain diffuse reflectance data. During measurements, each sample contains 0.1 to 10 wt % moisture and each sample is in a clear container pressed against the spectrometer window such that the IR source from the handheld device can pass to the drilled solids sample within the clear container without opening the clear container.

公开(公告)号：US10137486B1

公开(公告)日：2018-11-27

申请号：US15906175

申请日：2018-02-27

Applicant: Chevron U.S.A. Inc.

Inventor： Roopa Kamath ,  Schaun Malcolm Smith ,  Deyuan Kong ,  Gunther H. Dieckmann ,  Cesar Ovalles

IPC: B09C1/00 ,  B09C1/02 ,  B09C1/06 ,  B09C1/08 ,  B09C1/10

Abstract: Contaminant-containing soil can be remediated by subjecting the soil to microwave irradiation to heat the soil to a combustion temperature of from 150° C. to 1200° C. to initiate combustion. A target amount of the contaminant in the soil is destroyed. An oxidizer gas can be flowed through the soil using a gas blower and at least one gas injection line and controlled at a rate such that a self-sustaining smoldering combustion front is formed that moves through the soil. A microwave absorber additive can be added to the soil to accelerate the heating of the soil. At least one waveguide connected to a source of microwave energy directs microwaves into the soil.