Assignee: Jet Research Center, Inc.

Location: Arlington, TX
No. of patents: 37

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Number	Title	Issue Date
4948897	Method of preparation of 2,6-bis(picrylamino)-3,5-dinitropyridine A method for preparing 2,6-bis(picrylamino)-3,5-dinitropyridine (PYX) which includes the steps of first dissolving crystalline PYX in a primary solvent in which the solvent used is selected from the group consisting of pyridine, dimethylformamide, methyls...	08/14/1990
4861924	1,3,5-trinitro-2,4,6-tripicrylbenzene The compound 1,3,5-trinitro-2,4,6-tripicrylbenzene useful as an explosive....	08/29/1989
4855436	Method of preparation of 2,6-bis(picrylamino)-3,5-dinitropyridine A method for preparing 2,6-bis(picrylamino)-3,5-dinitropyridine (PYX) which includes the steps of first dissolving crystalline PYX in a primary solvent in which the solvent used is selected from the group consisting of pyridine, dimethylformamide, methyls...	08/08/1989
4844170	Well perforating gun and method A well perforating gun and method of perforating a subterranean surface within a well bore are provided. The perforating gun comprises a tubular gun body having a plurality of external recesses formed therein and positioned in spaced relationship on a hel...	07/04/1989
4817531	Capsule charge retaining device A method and means for sealed joinder of case and cap members of a capsular shaped charge wherein opposing frustoconical shoulders are formed in adjacent walls of a case and cap and a resilient ring is retained therein to hold the case and cap in operativ...	04/04/1989
4794990	Corrosion protected shaped charge and method An improved shaped charge comprised of a bell-shaped casing, a shaped explosive material disposed within the casing having a cavity formed therein and a liner disposed within the cavity formed of compressed powdered metal is provided. The compressed powde...	01/03/1989
4753170	Polygonal detonating cord and method of charge initiation The present invention comprises a detonating cord of polygonal cross section having three or more substantially flat sides of substantially equal length and substantially equal included angles between each of the sides....	06/28/1988
4739839	Capsule charge perforating system A perforating gun apparatus includes an elongated radially resilient carrier with a plurality of capsule type shaped charges attached to the carrier in a circumferentially phased pattern. The carrier is capable of passing downward through restricted diame...	04/26/1988
4739707	Shaped charge carrier assembly A shaped charge carrier assembly is provided for use in a perforating gun of the type used to perforate oil or gas wells. The assembly includes at least one shaped charge including an outer case having an outer surface and a first shoulder extending radia...	04/26/1988
4716833	Method of assembling a tanged charge holder A shaped charge carrier assembly includes a strip type carrier having openings therein for receiving shaped charges. Each of the openings includes first and second diagonally opposed pairs of resilient tabs for snugly engaging an outer case of the shaped ...	01/05/1988
4681037	Tanged charge holder A shaped charge carrier assembly includes a strip type carrier having openings therein for receiving shaped charges. Each of the openings includes first and second diagonally opposed pairs of resilient tabs for snugly engaging an outer case of the shaped ...	07/21/1987
4655138	Shaped charge carrier assembly A shaped charge carrier assembly is provided for use in a perforating gun of the type used to perforate oil or gas wells. The assembly includes at least one shaped charge including an outer case having an outer surface and a first shoulder extending radia...	04/07/1987
4621396	Manufacturing of shaped charge carriers Methods are provided for manufacturing a shaped charge carrier from a generally cylindrical thin wall tube. A plurality of flat areas are formed on the cylindrical tube, and an opening through the tube is associated with each of the flat areas for receivi...	11/11/1986
4609057	Shaped charge carrier A shaped charge carrier for a perforating gun includes a generally cylindrical thin wall carrier tube, a plurality of flat areas formed on the carrier tube, and an opening through each of the flat areas for receiving a shaped charge therein....	09/02/1986
4585374	High energy formed connections Method and apparatus for the joining of one tubular member to another tubular member through the use of the substantially instantaneous application of high energy to the tubular members, such as by the use of explosives, while placing one tubular member i...	04/29/1986
4559890	Mooring release apparatus and method An apparatus and method having particular utility in quickly releasing the moorings of large vessels and offshore platforms. The preferred embodiment of the apparatus comprises a pair of pyrotechnic cutting torches disposed in a housing included as a stru...	12/24/1985
4537255	Back-off tool A back-off tool comprising an explosive contained in a tubular housing which will disintegrate into fine particles upon detonation of the explosive. The explosive may be in the form of pellets so as to have the capability to vary the amount of explosive f...	08/27/1985
4534423	Perforating gun carrier and method of making A perforating gun carrier comprising an inner substantially tubular housing within an outer substantially tubular sleeve. The inner housing includes gun ports extending through the wall thereof in a pattern corresponding to the pattern of shaped charges t...	08/13/1985
4519313	Charge holder The present invention comprises a high-density perforating gun in which the shaped charges carried thereby are oriented so that the jets emanating therefrom substantially intersect the axis of the gun. The shaped charges may be vertically spaced by a dist...	05/28/1985
4505018	Underwater stud gun system and method for attaching an article to an underwater structure A cartridge loaded stud gun and a complementary anode attachment fitting provide a system for explosively attaching a sacrificial anode to a subsea structure. The system is capable of being operated by a remote-controlled vehicle, and contains a means for...	03/19/1985
4424086	Pyrotechnic compositions for severing conduits A stacked load of gas-forming pyrotechnic fuel pellets comprising metal, metal oxide and PTFE in varying amounts for use in apparatus for severing conduits in high pressure environments....	01/03/1984
4352397	Methods, apparatus and pyrotechnic compositions for severing conduits Methods of severing conduits along planes extending transversely to the axis thereof comprising confining a fuel composition within a fuel chamber in an elongated housing sized for insertion in a conduit, the housing including a plurality of spaced radial...	10/05/1982
4338713	Method of manufacture of powdered metal casing Disclosed herein is a powdered metal casing and an apparatus and method for making the powdered metal casing, which casing is useful for shaped explosive charges for perforating oil and gas wells....	07/13/1982
4298063	Methods and apparatus for severing conduits Apparatus for severing a conduit along a plane extending transversely through the conduit which includes an elongated housing forming a pair of longitudinally spaced-apart fuel chambers communicated by an impingement passage extending longitudinally betwe...	11/03/1981
4290486	Methods and apparatus for severing conduits Apparatus for severing a conduit along a plane generally transverse to the axis of the conduit which includes two confined explosive charges aligned axially with the conduit and terminating at opposed proximal convexly shaped ends facing each other across...	09/22/1981
4273047	Apparatus for perforating a well and its method of assembly Disclosed is a method and apparatus for attaching shaped charge units into a well perforating gun. The shaped charge unit has an ear shaped extension having a cavity for receiving a wire in the perforating assembly. A second extension is positioned on the...	06/16/1981
4273050	Placement method for Q.D. charges using minimum diving time An apparatus for the simultaneous placement of a plurality of objects on a substantially horizontal surface is disclosed, said apparatus comprising a platform to position the objects, release mechanisms to releasably attach the objects to the platform and...	06/16/1981
4220687	Powdered metal casing for perforating charge and its method of manufacture Disclosed herein is a powdered metal casing and an apparatus and method for making the powdered metal casing, which casing is useful for shaped explosive charges for perforating oil and gas wells....	09/02/1980
4184430	Method and apparatus for severing tubing Apparatus for severing tubing along a generally transverse plane through the tubing wall, and including two confined explosive charges aligned axially with the tubing wall and terminating at opposed, proximal ends facing each other across a space disposed...	01/22/1980
4180351	Methods and apparatus for severing reinforced concrete pilings Methods and apparatus for severing concrete pilings containing one or more longitudinally extending reinforcing rods are provided. The apparatus is comprised of at least one elongated barrel, a projectile positioned within the barrel, remotely detonatable...	12/25/1979
4172421	Fluid desensitized safe/arm detonator assembly Disclosed is a safe/arm detonator assembly for use with an oil well perforating gun assembly having two housing members sealingly isolated from well bore fluid and which are rotatable from a safe position wherein a detonator and a booster are held out of ...	10/30/1979
4116110	Method and apparatus for forming internal recesses in a hollow body Apparatus for forming a recess in an internal surface of an elongated hollow body comprised of a housing having a rotary mill and means for rigidly clamping the housing at a desired position within the interior of the body attached thereto. Means operable...	09/26/1978
4116130	Methods and apparatus for severing tubular members Methods and apparatus for severing tubular members whereby one or more shaped charges are positioned adjacent the interior walls of the tubular members and detonated to thereby sever the tubular members. The apparatus of the invention is adapted to be pla...	09/26/1978
4071096	Shaped charge well perforating apparatus Apparatus for perforating a well comprised of a closed retrievable carrier formed in an elliptic cylindrical shape and having shaped charge perforating means disposed therein. Upon actuation of the shaped charge perforating means the ellipticity of the ca...	01/31/1978
4025591	Bonding explosive fillers with anaerobic curing binders An article of manufacture and a method of producing same is disclosed, wherein the article is a solid explosive composition comprised of a major portion of particulate explosive material bound together by a minor portion of a cured anaerobic binding mater...	05/24/1977
4018163	Placement method for Q.D. charges using minimum diving time An apparatus for the simultaneous placement of a plurality of objects on a substantially horizontal surface is disclosed, said apparatus comprising a platform to position the objects, release mechanisms to releasably attach the objects to the platform and...	04/19/1977
3999483	Removing coatings from pipe A method and an article of manufacture useful in the method are provided for removing a fracturable coating, such as concrete, from a conduit, such as an underwater pipeline. According to the method a plurality of spaced explosive detonating cords are pla...	12/28/1976

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Assignee: Jet Research Center, Inc.