Columbia Gas of Ohio, Inc.

Columbia Gas System Service Corporation

Arthur C Eberle

David B Philips

Glenda S Holderbaum

Susan T Brown

Foster B Stulen

David M Thomson

Jerry E Farstad

John J Sherman

John L Fabian

A fluid-filled pipe is investigated by a non-intrusive procedure to determine whether the fluid is liquid or gaseous, whether it is flowing or static, the direction of flow if it is flowing, the approximate pressure if it is a gas, and the rate of flow if it is a gas. The results are obtained by applying a heater to the surface of the pipeline and measuring the upstream and downstream temperatures of the surface of the pipe wall before and after the beginning of the application of heat. Some of the data generated is compared with data from another source to assist in the determination of the characteristics to be ascertained.

Method for measuring physical characteristics in a pipeline without

A fluid-filled pipe is investigated by a nonintrusive procedure to determine whether the fluid is liquid or gaseous, whether it is flowing or static, the direction of flow if it is flowing, the approximate pressure if it is a gas, and the rate of flow if it is a gas. The results are obtained by applying a heater to the surface of the pipeline and measuring the upstream and downstream temperatures of the surface of the pipe wall before and after the beginning of the application of heat. Some of the data generated is compared with data from another source to assist in the determination of the physical characteristics to be ascertained.

Method and apparatus for measuring pressure in a pipeline without tapping

A fluid-filled pipe is investigated by a non-intrusive procedure to determine whether the fluid is liquid or gaseous, whether it is flowing or static, the direction of flow if it is flowing, the approximate pressure if it is a gas, and the rate of flow if it is a gas. The results are obtained by applying a heater to the surface of the pipeline and measuring the upstream and downstream temperatures of the surface of the pipe wall before and after the beginning of the application of heat. Some of the data generated is compared with data from another source to assist in the determination of the physical characteristics to be ascertained.

Buried fluid containing conduits, such as natural gas lines, are located by providing variable frequency sinusoidal excitation acoustic signals over a broad frequency range to the fluid content of the conduit so that the conduit will vibrate and cause elastic vibration in the media in which such conduit is buried. A plurality of measurements of said vibrations are taken on the surface of the media or ground in which such conduit is buried. The measurements are taken laterally of the estimated position of the conduit. The position of the conduit is determined by changes in the characteristics of the vibrations caused by the differences in distances between the pipe and the measurements.

Acoustic tracing of buried conduits

An apparatus for measuring the throughput and average suction and discharge pressures of a compressor comprises pressure sensors for measuring the suction and discharge pressures of the compressor and in one embodiment a device for measuring gas temperature. The apparatus further comprises a data processor for receiving signals representative of the suction and discharge pressures of the compressor and generating a signal representative of the throughput of the compressor during a predetermined time interval.

Apparatus for measuring the quantity of gas pumped by a compressor

An apparatus for measuring the work produced by a compressor comprises pressure sensors for measuring the suction and discharge pressures of the compressor and a device for measuring the operating speed of the compressor. The apparatus further comprises a data processor for receiving signals representative of the suction and discharge pressures of the compressor and its operating speed, and generating a signal representative of the work performed by the compressor during a predetermined time interval. Desirably, the data processor is designed to integrate the work output of the compressor over a series of time intervals to generate a cumulative horsepower-hour reading for the compressor over an extended period of time.

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Upper Arlington, OH, United States of America

Arthur C Eberle