Phillips Petroleum Company

Other

Clark-schwebel, Inc.

John H Walker

James Easton Hendrix

Gary D Webster

Daniel L Walters

Clint D Gray

Dennis J Vaughan

Douglas M Bowen

Norman J Kessens

David Collier

Douglas E Campbell

James Lee Rakes

Norman J Hole

Harold V Wood

Steven L Hickman

A film having a width of at least about one foot as defined by the cross machine direction thereof and a substantially uniform average thickness of less than about 10 mils is formed of a crosslinkable thermoplastic olefin polymer, a crosslinking agent, and preferably a flame retardant. The film can be combined with a suitable substrate to form a prepreg or coated substrate, and the prepreg or coated substrate can be subsequently treated under conditions to crosslink the olefin polymer and to form a rigid composite structure. The composite structure is particularly useful for printed circuit board applications.

Crosslinkable polymeric coatings and films and composite structures

A lightweight back-pack generator set having a spark-ignited engine operating on middle distillate fuels (e.g., JP-5, JP-8 and F-34) has been provided. The generator set includes a back-pack frame; an alternator; and a spark-ignited combustion engine adapted to operate on a middle distillate fuel. The engine uses a preheater for heating the intake manifold to facilitate start-up operation of the engine. The present invention also provides a simple and inexpensive method for converting a spark-ignited gasoline engine to operate on a middle distillate fuel for providing a lightweight engine suitable for driving an alternator, a portable generator, or other portable equipment.

Lightweight back-pack generator set having a spark-ignited engine

A method of molding thermoplastic material into a collar for use on a drill string is disclosed. Initially a precursor is constructed by rolling a sheet of thermoplastic material, containing long reinforcement fibers, into a tubular 'roll' and placing the roll in a generally cylindrical open mold so as to align longitudinal axes of the roll and the open mold. A cylindrical mold core, which mates with the open mold to form a mold cavity, has an end piece perpendicular to the cylindrical portion for closing the mold. The mold core is forced, with correct alignment, into the open mold using high pressure which closes the mold and causes the thermoplastic material, containing long reinforcement fibers, to take the required shape. The thus formed part is cooled and ejected from the mold for use as the precursor. Final steps include machining the ends of the precursor to produce the desired collar.

Method of molding a composite drill collar

An improved method for protecting a drill pipe casing from a rotatable string of drill pipe longitudinally extended therethrough. The method involves positioning a collar structure circumferentially around the upper end of one pipe section which is internally threaded and then thereafter engaging therewith the lower end of a second pipe section which is externally threaded and engageable with said first pipe section. The collar structure is formed of a poly(arylene sulfide) and is a single unitary structure having circumferentially extended outer surfaces which are adapted to resist spinning with the drill pipe string positioned in the casing structure.

Method for protecting a pipe casing from a drill pipe string

A drill collar is formed from a composite material to protect equipment during drilling operations as in oil and gas exploration.

Composite drill collar

A pair of substantially identical half-sections adapted to be wedged around a rod in locked position with the half-sections stamp molded from a prepreg formed by surrounding at least one fiber mat of inorganic reinforcing material with a matrix of PPS to produce a prepreg containing from about 15 to about 45 weight percent of the inorganic reinforcing material.

Stamp molded paraffin scraper

A resinous block copolymer having an anti-blocking agent incorporated therein, which copolymer is made printable by the incorporation of a small amount of an olefin polymer.

Growing community of inventors

Bartlesville, OK, United States of America

John H Walker