Class 285/355 - Screw

Subclass of Class 285 - Pipe joints or couplings
Definition: Subject matter comprising screw threads at the coupling
No. of patents: 210
Last issue date: 06/08/2010

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Number	Title	Issue Date
7731246	Pipe coupling system A tubular coupling system and method; the system and method in at least certain aspects, using a coupling member with an interior protective ring that has at least one inner energizing member which, upon compression, forces the body of the coupling member against an...	06/08/2010
7681928	Pipe fitting A pipe fitting is made of plastic, such as polysulphone PSU or polyphenylsulphone PPSU. At least one end of the pipe fitting (1) comprises an external thread (2) for connecting the pipe fitting (1) to a mounting element, such as a pipe or a moun...	03/23/2010
7628429	Double containment pressure termination fitting for dissimilar materials A termination fitting for use with a double containment system includes an inner segment of pipe and an outer termination cap. The outer termination cap has an open first end and an open second end, and the open second end is threaded. The inner segment of pipe exte...	12/08/2009
7431348	Subsurface drill string A drill string comprises a first drill string member having a male end; and a second drill string member having a female end configured to be joined to the male end of the first drill string member, the male end having a threaded portion including generally square t...	10/07/2008
7426784	Compact fire sprinkler attachment insert The invention satisfies this need. The invention is an internally threaded insert for use with a polymetric pipe fitting in a fire sprinkler system. The insert comprises an outer side surface, an outer rearward surface and an outer forward surface. The outer forward...	09/23/2008
7419189	Hydraulic fitting A high pressure hydraulic fitting (300) includes a body (302) having a central passage (322), a channel (304), a threaded section (314), and an extension section (310), wherein the threaded section (314) is disposed b...	09/02/2008
7387319	Coupling for anchor bolts A coupling for anchor bolts, includes a sleeve having an internal screw thread and two anchor pipes having an external screw thread, the ends of the pipes being screwed into the sleeve. The sleeve is provided with an annular rib in the longitudinal centre thereof, t...	06/17/2008
7380839	Sealing expandable tubing Expandable tubing and methods seal a connection between expandable tubulars, and in particular, seal a connection between expandable tubulars post-expansion. In one embodiment, a method includes sealing a connection between expandable tubulars in the form of section...	06/03/2008
7334821	Premium threaded tubular joint comprising at least a threaded element with end lip A premium threaded tubular connection including, on at least one threaded element, a distal abutment surface at the free end of a threaded element, and a lip sealing surface at a given distance from the threading. The lip includes an appendix that extends the lip to...	02/26/2008
RE39869	High efficiency drill pipe A drill pipe 10 comprises an elongate pipe section 12 having a substantially uniform pipe outer diameter 18 and a substantially uniform pipe inner diameter 20. A pin tool joint 14 is welded at one end to the pipe section, and a box...	10/09/2007
7255374	Threaded tube joint A threaded tube joint for oil extraction industry has a trapezoidal thread and a toroidal sealing surface (11) placed at its end near the thread and engages, for sealing, a corresponding frusto-conical sealing surface (12) wherein the toroidal sealing ...	08/14/2007
7246667	Radial expansion of tubular members An apparatus and method for coupling a tubular member to a preexisting structure. ...	07/24/2007
7237810	Plastic pipe adhesive joint A method of joining two pipe ends, by forming male threads on an end of a first pipe with a steep taper angle, forming matching female threads on an end of a second pipe, and applying adhesive material to the threads before twisting the pipes to fully engage the mal...	07/03/2007
7178391	Insertion tube methods and apparatus A drill string comprises a first drill string member having a male end; and a second drill string member having a female end configured to be joined to the male end of the first drill string member, the male end having a threaded portion including generally square t...	02/20/2007
7121595	Device for leaktight coupling of a tube to a threaded tubular nose A device for leaktight coupling of a tube to a tubular nose, the tube being provided with an outwardly-directed bead at a distance from its end, the tubular nose presenting an outside thread and including an inlet bore for defining a housing for an annular gasket an...	10/17/2006
7108063	Connectable rod system for driving downhole pumps for oil field installations Improved sucker rod joints for down hole petroleum pumping applications are provided within the form factor of standard API sucker rods, such that existing inventory in suitable condition is fully usable in more demanding applications. The pin ends are selected or p...	09/19/2006
7055865	Lateral connection system A service tee forming part of a main fluid line has a laterally extending female fitting with threads and a gasket spaced axially from the distal end of the threads. A male fitting having a series of male threads and a cylindrical extension terminating in the distal...	06/06/2006
7032934	Hydraulic fitting A connector for a fluid conduit is provided herein. The connector includes a conduit structure and an annular seal member. The conduit structure has a frustro-conical surface and a seal groove. The frustro-conical surface may be an external surface or an internal su...	04/25/2006
6997264	Method of jointing and running expandable tubulars A connector arrangement used for connecting a first tubular to a second tubular. The first tubular member has at least one circumferential ring profile, and the second tubular member has a corresponding number of matching circumferential ring profiles. When the ring...	02/14/2006
6971685	Multi-point high pressure seal for expandable tubular connections An expandable threaded connection between segments of expandable tubulars that provides multiple sealing points along the pin and box members that can withstand high pressure is disclosed. The present invention utilizes a gap that is created between the pin nose and...	12/06/2005
6968618	Expandable connector An expandable threaded connection includes a first tubular member, a second tubular member and a threaded connection for coupling the tubular members that includes one or more sealing members. ...	11/29/2005
6933264	Threaded component for seizure-resistant tubular threaded joint The invention concerns a threaded component for a seizure-resistant tubular threaded joint wherein a lubricating substance is deposited in a thin film on at least the surface of the threads of the threading, said surface being treated to adsorb said lubricating subs...	08/23/2005
6916248	Flexible coupling Flexible couplings are provided comprising a male member disposed within a female member in a spaced apart configuration, with the space being filled, at least partially, with an elastically deformable material. The male and female members comprise features that pre...	07/12/2005
6857668	Replaceable corrosion seal for threaded connections The threaded connection between the pin and the box ends of two pipes is sealed externally and internally to protect the threads in the connection from exposure to corrosive fluids. Seals are provided at each axial end of the threads. External seals are formed by me...	02/22/2005
6851720	Hydraulic joint structure In a hydraulic joint structure for joining respective tubular joint portions of two members, opposed pressure-contact surfaces of the two members for preventing loosening form a downstream space on the downstream side of a seal member. A passage is formed on the pre...	02/08/2005
6845983	Gasket with outer edge damping channel and method and apparatus for manufacturing same A gasket (10) for sealing flange connections in piping systems for media, while changing a natural frequency of the gasket to avoid resonance in the flange connection, comprising a plate (12) that defines a opening (14) for passage of media thro...	01/25/2005
6811189	Corrosion seal for threaded connections The threaded connection between the pin and the box ends of two pipes is sealed externally and internally to protect the threads in the connection from exposure to corrosive fluids. Seals are provided at each axial end of the threads. The external seals may be forme...	11/02/2004
6764108	Assembly of hollow torque transmitting sucker rods An elongated drive string assembly includes a plurality of hollow sucker rods and connecting elements with an axis, connected together and between a drive head located at the surface of an oil well and a rotary pump located deep down in an oil well. Each hollow suck...	07/20/2004
6755447	Production riser connector A pipe connector has a rigid seal/support ring mounted on its pin. The pin has a nose and external threads extending rearward from the nose. The rigid seal/support ring is fixedly mounted on an exterior portion of the pin farther from the pin nose than the pin threa...	06/29/2004
6729658	Threaded tubular element for fatigue resistant threaded tubular joint and resulting threaded tubular joint The threading of a threaded tubular element includes at least one tangential multiple radius junction zone at the thread root, in particular on the load flank side. This zone include a principal arc with a radius where the support circle cuts the flank at a point. T...	05/04/2004
6722706	Thread from with multifacited flanks A thread form for a tubular connection of the type having a pin member adapted to be made-up with a box member to form a pipe joint as shown. The pin member has pin threads with thread crests and thread roots which are adapted to be made-up with a mating box member ...	04/20/2004
6712090	Hydraulic valve A fluid tank valve assembly of the type employed for water tanks for toilets has a tank refill valve located atop a fluid inlet supply tube. The refill valve has a lever that is raised and lowered to open and close the valve. An inverted, cup-shaped hood is position...	03/30/2004
6705648	Pipe joint A pipe joint comprising: a pin having a tapered male screw section formed on an outer circumferential face of an end of a pipe; a box having a tapered female screw section, which can be screwed to the tapered male screw section, formed on an inner circumferential fa...	03/16/2004
6695357	Threaded pipe connection having a retainer gasket with pressure relief vents A connection for threaded pipes and other tubular sections including a gasket for interposition between a first and an opposing second interface surface of the connection. The gasket includes a retainer and a generally annular seal element received in a g...	02/24/2004
6679526	Threaded joint for an oil well pipe A threaded joint for an oil well pipe is provided which prevents the occurrence of galling at the time of repeated tightening and loosening and which provides a high degree of air tightness and has excellent galling resistance and air tightness without us...	01/20/2004
6669205	Retainer gasket with pressure relief vents A gasket for interposition between a first and an opposing second interface surface of a sealing assembly. The gasket includes a retainer and a generally annular seal element received in a groove formed into at least one side of the retainer. Such retaine...	12/30/2003
6626471	Double flex seal for tubular connection A threaded tubular connection has a box member including an internal thread, a pin member including an external thread engageable with the internal thread of the box member, and a protruding sealing surface disposed in the box member such that the pin mem...	09/30/2003
6619696	Expandable locking thread joint A thread for expandable downhole tubular connections is disclosed. It features a locking pattern on the pin and box, which engages upon expansion of the connection. The locking pattern compensates for longitudinal shrinkage away from a torque shoulder, as...	09/16/2003
6609735	Threaded and coupled connection for improved fatigue resistance Threaded and coupled pipe connections are provided with a number of design features that increase resistance of the connection to fatigue failure from cyclical side loading. The features acting alone or in combination include the provision of a pin thread...	08/26/2003
6607220	Radially expandable tubular connection A radially expandable tubular connection including a box member having an internal thread and a first seal surface and a pin member having an external thread and a second seal surface. The external thread threadedly engages the internal thread and the fir...	08/19/2003

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Class 285/355 - Screw