公开(公告)号：US20190071330A1

公开(公告)日：2019-03-07

申请号：US16119599

申请日：2018-08-31

Applicant: Chevron U.S.A. Inc.

Inventor： David G. THOMAS ,  Roopa KAMATH ,  Eric DANIELS ,  David A. REYNOLDS

IPC: C02F1/469 ,  C02F1/461

Abstract: Provided herein are devices, systems, and methods for removing contaminant ions from water within an aquifer. The devices, systems, methods employ an elecrokinetic driving force to induce the migration of charged species towards electrodes, where they can be concentrated and removed from the aquifer. In this way, the devices, systems, methods described herein can be used to economically remediate groundwater contaminated with charged species.

公开(公告)号：US20200132597A1

公开(公告)日：2020-04-30

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: G01N21/359 ,  G01N33/24

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.