Other

Chevron Research & Technology Company

Chevron U.s.a. Inc.

Steven F Sciamanna

Scott D Lynn

Michael Dubrovsky

Aldo F Sciamanna

Robert Martin Carlson

Andrew William Tudhope

William John Boardman

Thomas B Casserly

Jan B Bates

Steven D Lynch

A method of forming a diamond-like carbon coating by plasma enhanced chemical vapor deposition on an internal surface of a hollow component having an inner surface. A reduced atmospheric pressure is created within a pipe or other hollow component to be treated. A diamondoid precursor gas is introduced to the interior of the component. A bias voltage is established between a first electrode and one or more second electrodes. The first electrode is or is attached to the component. The second electrode is externally offset from an opening of the component, by a hollow insulator. A plasma region is established adjacent an inner surface of the component and extends through the hollow insulator. The precursor gas comprises at least one diamondoid. The pressure and bias voltage are selected such as to cause the deposition of diamond-like carbon on the inner surface.

Method for producing diamond-like carbon coatings using PECVD and diamondoid precursors on internal surfaces of a hollow component

An electrolytic chlorine gas generating system is disclosed. The system includes an electrolytic cell generating the chlorine gas, a brine tank supplying saturated brine to the anode compartment of the cell, and an acid feed tank containing hydrochloric acid at sufficient concentration to maintain the anolyte brine at less than about pH 4.0. In operation, the brine tank contains solid sodium chloride which dissolves in the brine and replenishes the anolyte brine solution as chloride ion is consumed during electrolysis. The acid feed tank is in fluid communication with the brine tank so that the brine is maintained at a constant volume during electrolysis. A caustic system is also disclosed including a means for controlling caustic delivery.

Caustic concentration regulator for chlorine generators

Apparatus for clarifying produced water. A flotation chamber has a produced water inlet, a clean water outlet, and is segmented into a plurality of cells by baffles. An oil overflow compartment is in fluid communication with the upper portion of the chamber. Produced gas is introduced into each cell of the flotation chamber by porous sparger tubes creating bubbles of 100 to 1000 microns in diameter. The bubbles rise through the water removing any suspended oil particles. The gas exits through a gas outlet. The removed oil collects on the liquid surface of the produced water and overflows to the overflow compartment. Oil is removed from the overflow compartment via an oil outlet.

Clarification of produced water in the oil and gas industry

An electrolytic chlorine gas generating system is disclosed. The system includes an electrolytic cell generating the chlorine gas, a brine tank supplying saturated brine to the anode compartment of the cell, and an acid feed tank containing hydrochloric acid at sufficient concentration to maintain the anolyte brine at less than about pH 4.0. In operation, the brine tank contains solid sodium chloride which dissolves in the brine and replenishes the anolyte brine solution as chloride ion is consumed during electrolysis. The acid feed tank is in fluid communication with the brine tank so that the brine is maintained at a constant volume during electrolysis.

Chlorine generator

A process for removing oily residues from aqueous waste streams using a cross flow filtration system in which the efficiency of a dynamic membrane system comprising a gel layer and supporting semipermeable membrane is optimized by applying a controlled shear force parallel to the plane of the membrane.

Removal of oily residues from aqueous waste streams

A process is disclosed for removing dissolved organics from an aqueous composition, said composition comprising water, carbon dioxide and dissolved organics, and said composition having a pH of 6.5 or less and an inlet organics concentration. The process comprises the steps of feeding said aqueous composition to a centrifugal separation zone, preferably to a hydrocyclone, depressurizing said composition in said centrifugal separation zone to regasify at least a portion of said carbon dioxide. An aqueous product stream is removed from the centrifugal separation zone wherein the concentration of said organics is less than said inlet organics concentration. The process is particularly useful in the cleanup of industrial wastewater, and also for removing organics from water produced in petroleum production operations.

Process for removing dissolved organics from aqueous compositions

A hydrocyclone is disclosed which comprises a sleeve defining a central circularly symmetrical separation chamber. A relatively stationary fluid introduction structure is in flow communication with the separation chamber adjacent the upstream end of the sleeve. The fluid introduction structure imparts an axial component to the fluid in the direction of the downstream end of the sleeve. A more dense liquid recovery structure is present having an annular recovery entrance and having an exit for recovery of the more dense liquid. The recovery entrance is annular and radially displaced from the region of the axis of the sleeve and is in flow communication with the downstream end of the sleeve. A relatively stationary outer casing defines a central passageway about the longitudinal axis and in which the sleeve is mounted in rotatable liquid tight relation to the casing. The sleeve is rotatable in a selected rotational direction. The less dense liquid is recovered from the region of the axis.

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Moraga, CA, United States of America

Steven F Sciamanna