Gearhart-owen Industries, Inc.

James Douglas Young

Serge A Scherbatskoy

Harrold D Owen, Sr

David W King

Marvin Gearhart

Rudolph R Mendoza

Robert Lee Roper

J C Smith

This describes a method for improved data signaling equipment for use with well-drilling tools for rapidly sending measurements made down the hole in the wellbore to the surface without the need of an electric cable. A special well tool is connected into a drill string having a drill bit coupled thereto for drilling a borehole. During normal drilling operations, the data-sending equipment is not in operation, and the main body of circulating or drilling fluid is passed through a main valve in the downhole tool and bypasses a pressure-changing unit. A sensing unit is incorporated in the downhole tool and measures downhole parameters. When it is desired to send these data to the surface, the main circulation of drilling fluid is stopped and the bypass valve closed. Then, a small amount of fluid is supplied to the 'closed' drill string from a substantially constant-pressure source. Pressure changes are then generated in this closed fluid-filled drill pipe under quiescent conditions while the drilling operations are momentarily halted.

Downhole signaling system

Method and apparatus for emplacing a liner in a conduit in a well penetrating subterranean formations characterized by suspending at a predetermined depth in the well at least one annular liner having an annular body portion and an adjacent, concentrically disposed swage means that is adapted for being driven interiorly of the body portion for expanding the latter outwardly into contact with the conduit; firing a setting tool in the method to drive the swage means concentrically interiorly of the body portion; and removing the setting tool, leaving the swage and the body portion set in the conduit with a large bore penetrating longitudinally thereof. Also disclosed are straddle patches having a liner at each end, either set in a unitary operation or set by a two-step operation; other combinations employing the liners and the specific apparatus for setting the liners.

Liner and reinforcing swage for conduit in a wellbore and method and

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Crowley, TX, United States of America

James Douglas Young