Abstract: Methods for forming a pipe end for a pipe having an inner surface lined with a liner are provided, wherein the pipe is cut at an axial location to provide a first end having an initial inner diameter defined by an inner surface of the pipe; and a length of the pipe is expanded from the first end to form an upset, bell end where an inner diameter of the upset, bell end is larger than the initial diameter, thereby defining an annulus between the inner surface of the pipe and the liner. A clamp for limiting a pipe's movement during various operations is also provided.

Abstract: A conduit assembly for a fuel cell system includes an inner dielectric tube having a first end and a second end, a first metal tube including a first lip coupled to the first end of the inner dielectric tube, a first dielectric ring coupled to the first lip of the first metal tube, a second metal tube including a second lip coupled to the second end of the inner dielectric tube, a second dielectric ring coupled to the second lip of the second metal tube, and an outer dielectric tube having a first end and a second end, coupled to the inner dielectric tube, the first dielectric ring and the second dielectric ring.

Abstract: A method of forming a leak tight connection between a pipe and a port made of different metals is described. A leak tight connection between a pipe made of a first metal and a port made of a second metal is also described.

Abstract: A fluid fitting for attachment to a tube includes a cylindrical first sleeve having a tapered outer end surface and an inner surface defining an axial bore for receiving the tube. A cylindrical second sleeve creates an annular space for receiving the tube between the first and second sleeves when the second sleeve is placed within the axial bore. The axial bore has substantially equal diameter throughout. A swage ring has a tapered inner surface that axially swages the swage ring to the first sleeve, second sleeve and tube. A first sleeve shoulder restricts axial movement of the swage ring. A first portion protrudes from the inner surface of the first sleeve to restrict axial movement of the second sleeve.

Abstract: A method for the pressing of a press fitting, with a tube inserted into the press fitting, by means of a pressing tool, wherein the press fitting has an encircling bead in which an O-sealing ring is placed, wherein the tube ends within the press fitting and a first pressing is carried out within the bead, wherein, furthermore, a further pressing is carried out on the tube-insert side of the press fitting at a distance from the bead, the further pressing leading to the press fitting and the tube obtaining a conicity which prevents them from being pulled off and runs in the same direction.

Abstract: A device for coupling fluid-circulation tubes includes a first coupling connecting first and second tubes, in which first coupling the respective ends of the first and second tubes are arranged coaxially aligned with one another. At least one of the opposite ends of the first and second tubes is capable of being secured to a second coupling, which is configured to couple the first or second tube to a pipe of a fluid circuit, the second coupling including at least one portion made in one piece with the opposite end of the tube in question, such that the portion of the second coupling forms the opposite end of the tube in question.

Abstract: An exhaust system of a motor vehicle includes, but is not limited to an inner exhaust pipe that is inserted into an outer exhaust pipe in an overlap region, and the two exhaust pipes are crimped in the overlap region.

Abstract: An expandable threaded connection between segments of expandable tubulars that provides a high bearing pressure seal at a specific area along the pin and box members is disclosed. The invention utilizes a “groove” in a surface of the box member and a corresponding “rib” on the pin nose. The radial expansion of the tubulars causes the pin to become shorter in length, thereby causing the pin nose to retract from the back of the box member. As the pin nose retracts, the rib on the pin nose moves backward until a portion of the rib contacts a portion of the groove in the box member. The point of contact between the rib and the groove creates a metal-to-metal seal between the pin and box members. Because the point of contact between the rib and the groove is a relatively small area, the force acting on the point of contact generates a high bearing pressure that is equal to or greater than the internal pressure within the expandable tubulars and, thus, generates a high pressure seal.

Abstract: A new shrink fitting method including deformation is disclosed, in which a high bonding force can be obtained without accurate mechanical process such as forming an insertion body having an outer diameter greater than an inner diameter of an object for receiving the insertion body. The shrink fitting method comprises preparing a pipe and a rod material whose inner and outer diameters are different from each other; bonding the pipe and the rod material to each other in a state that the pipe or the rod material is deformed by heating; deforming the pipe to allow the inner diameter of the pipe to be equal to the outer diameter of the rod material; and cooling the bonded pipe and rod material. The shrink fitting method can be widely used for various mechanical parts.

Abstract: A spoolable connector which connects two opposing sections of coil tubing so as to transmit load between one section of coil tubing and another section of coil tubing. The spoolable connector has opposing non-circular grooves into which portions of the sections of coil tubing are deformed so as to create the torque transmitting connection between the spoolable connector and sections of coil tubing. The spoolable connector also includes a plurality of parallel radial slots on each opposing end to enhance bending of the connector at the ends as well as a plurality of longitudinal slots at each end to accommodate the weld seam line in the coil tubing. Seals may be installed as a sleeve which in use fits over the mid-section of the connector.

Abstract: An expandable tubular coupling apparatus includes a first expandable tubular member, a second expandable tubular member, and means for sealingly coupling the first expandable tubular member to the second expandable tubular member.

Abstract: A fitting for making connections with a pipe includes a coupling body having an inside surface defining a bore for receiving a pipe. A ring is fitted over the coupling body for sealing and mechanically connecting the coupling body to the pipe. An axisymmetrical main seal is formed on the inside surface of the coupling body that seals and connects to the pipe when the ring is installed on the coupling body. An axisymmetrical inboard seal is formed on the inside surface of the coupling body axially spaced from the main seal that seals and connects to the pipe when the ring is installed on the coupling body. At least one of the coupling body and the ring is configured so that the inboard seal seals and connects after the main seal seals and connects to the pipe. An axisymmetrical outboard seal is formed on the inside surface of the coupling body axially spaced from the main seal that connects to the pipe when the ring is installed on the coupling body.

Abstract: An end piece for a flexible connector comprises a sleeve defining the proximal end thereof. A length of corrugated tubing is extended into the sleeve and the sleeve is crimped thereby joining the length of corrugated tubing to the end piece. For high pressure applications a length of polymeric tubing, a length of mesh tubing, and an outer sleeve are positioned in a surrounding relationship to the sleeve of the end piece and the outer sleeve is crimped thereby securing the length of mesh tubing to the end piece.

Abstract: A threaded joint for pipes comprising at least one seal of the metal-metal interference type arranged externally to the female thread. The joint has an extension of the box beyond the seal which produces an elastic tightening band effect on the seal so that excessive interference on the seal is not necessary, thus favoring correct making up.

Abstract: A fitting for a fluid conduit includes a coupling body having an inside surface for engaging an outside surface of a fluid conduit and a shoulder portion for limiting axial insertion of the fluid conduit into the coupling body. At least one seal is formed on the inside surface of the coupling body. The at least one seal includes a proximal seal adjacent the shoulder portion. A ring is annularly disposed on the coupling body urging the at least one seal into the fluid conduit to seal and mechanically connect the coupling body to the fluid conduit.

Abstract: A flexible connector comprises a length of corrugated tubing, a polymeric sleeve aligned with the distal end of the length of corrugated tubing, and a length of mesh tubing extending the entire length of corrugated tubing and over the polymeric sleeve. The distal end of the corrugated tubing, the polymeric sleeve, and the distal end of the length of mesh tubing are received in a sleeve which is formed integrally with an end piece. The sleeve is crimped into permanent retaining engagement with the length of corrugated tubing, the polymeric sleeve, and the length of mesh tubing. The end piece functions to secure the flexible connector into engagement with an adjacent component.

Abstract: A coupling fitting for high pressure hose is provided. The coupling fitting includes a stem portion made of metallic material for connection to the high pressure hose. A coupling head made of a non-metallic material is connected to an end of the stem portion. The coupling head is configured for connection with a complementary fitting.

Abstract: A connector bolt for securing an oil cooler to an engine block is made of first and second telescopic pieces. The bolt can be made in different lengths by adjusting the telescopic position of the first and second pieces. The length is fixed by securing the relative positions of the first and second pieces.

Abstract: A connector which joins two opposing sections of coil tubing or coil tubing to coil tubing tools so as to enable torque applied from one section to be transmitted to the other section is provided. The connector employs varying width and depth grooves into which portions of the sections of coil tubing are deformed so as to create the torque transmitting connection between the connector and sections of coil tubing. Each of the grooves have a narrow width portion and a wide width portion and corresponding shallow depth and deep depth portion. The narrow width portion of one of the grooves is approximately 180° out of phase from the narrow width portion of the other varying width groove.

Abstract: A radially expandable multiple tubular member apparatus includes a first tubular member and a second tubular member engaged with the first tubular member forming a joint. A sleeve overlaps and couples the first and second tubular members at the joint.

Abstract: 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 sections of an expandable liner. The method comprises the steps of connecting a first expandable tubular in the form of a first section of the liner and a second expandable tubular in the form of a second section of the liner. A seal is located between radially overlapping portions of the liner sections, and the seal is configured to maintain sealing between the liner sections both pre and post expansion.

Abstract: A coiled tubing connector for connecting tools together when they are inserted into a well bore. The connector includes a disposable element that may be severed along with the connected portion of the coiled tubing. This provides for quick disconnect and reuse of the remainder of the connector.

Abstract: A radially expandable tubular connection and methods for expansion related thereto are disclosed. In an embodiment, a radially expandable tubular connection includes a radially-expandable box member. The radially-expandable box member includes an internal thread, and a non-threaded internal area including a groove providing a mechanical means for securing position of an elastomeric seal ring disposed in the groove. The radially expandable tubular connection further includes a radially-expandable pin member. The radially-expandable pin member includes an external thread for threadably engaging the internal thread. In addition, the radially-expandable pin member includes a non-threaded external seal surface carried by an elongated pin nose for engaging the elastomeric seal ring in a sealable manner.

Abstract: A flexible connector comprises a length of corrugated tubing having a distal end and an end piece having a proximal end. The proximal end of the end piece is engaged with the distal end of the length of corrugated tubing and a length of polymeric tubing is utilized to initially retain the end piece and the length of corrugated tubing in engagement with one another. A length of mesh tubing may be extended along the length of corrugated tubing and around the exterior of the length of polymeric tubing. A sleeve is positioned in alignment with the length of polymeric tubing, with the proximal end of the end piece, and with the distal end of the length of corrugated tubing. The sleeve is crimped to permanently retain the proximal end of the end piece in engagement with the distal end of the length of corrugated tubing.

Abstract: A process for forming a metallic tubular connector of the type having a cylindrical shell which extends circumferentially about a tubular body for joining said tubular connector to a conduit. The process involves using a first forming machine to form a first peripheral bead in a first end portion of a tubular metallic body, having a substantially uniform diameter and wall thickness, reduce the outside diameter of a second end portion, and slope an intermediate surface portion. Then, a second end forming machine tool, carrying a metallic socket, freely receives the tubular body second end portion, contacts the sloped intermediate surface portion, forms a second peripheral bead adjacent the first peripheral bead, while an annular end surface of the socket is compressed and locked between the first and second beads. Further, the tubular body is manufactured from a 5000 series aluminum alloy material.

Abstract: A fitting for a fluid pressure conduit. The fitting includes a coupling body having a substantially axisymmetrical inside surface for engaging an outside surface of the fluid pressure conduit. The inside surface has at least one substantially axisymmetrical seal formed as at least one axisymmetrical ridge on the inside surface of the coupling body. There is at least one seal land on an outside surface of the coupling body adjacent the substantially axisymmetrical seal(s). There are a plurality of anti-torsion ridges on the inside surface of the coupling body, the anti-torsion ridges having friction surfaces for resisting torsion between the fitting and the fluid pressure conduit. Furthermore, there is at least one torsion land formed on the outside surface of the coupling body adjacent the torsion ridges.

Abstract: An extension portion extending outwardly is integrally formed on the edge of an end portion of an exhaust pipe; a collar is fixed on the outer periphery of the end portion of the exhaust pipe by caulking; and the edge of the outer end of the collar is abutted against the extension portion. The aforementioned arrangement provides a connection portion of an exhaust pipe for an engine which is intended to rigidly connect the exhaust pipe to an exhaust port of the engine, to prevent gas leakage by eliminating the occurrence of clearance at the connecting portion, to reduce the flow resistance of exhaust gas in the exhaust pipe, and to reduce the production cost of the connection portion.

Abstract: A high pressure be seating assembly adapted for liquid sealing against a rigid surface having a connecting conduit. The tube sealing assembly includes a rigid, elongated, tube member having a spherical sector-shaped distal end portion with a radius substantially larger than the radius of the tube member. The tube member further includes a central conduit terminating at an apex of the spherical sector-shaped distal end portion to define an annular rim portion such that a fluid-tight seal can be formed between the central conduit of the tube member and the connecting conduit of the surface. This seal is formed at a contact interface between the rim portion and the surface when a relative axial force is applied therebetween.

Abstract: High localized loading, galling, and high torque forces have been generally eliminated or greatly reduced in a two ferrule tube fitting assembly through suitable modification of the rear ferrule so as to redirect the reaction forces acting between the front ferrule and the drive nut. The rear ferrule has a cylindrical interior wall that closely surrounds the tube end and is provided on the interior cylindrical wall with a circumferentially continuous radial recess that is located between the nose and rear wall of the rear ferrule. The rear ferrule also has a radially external wall that is substantially conical and additionally shaped to extend radially outward toward the enlarged diameter portion or flange of the rear ferrule. The rear ferrule further includes a contoured face on the rear driven surface of the ferrule that engages the drive surface of the drive nut.

Abstract: A method of connecting two malleable pipes comprising locating the pipes, one inside a portion of the other with O-rings between the pipes, and applying a crimping tool to inwardly deform the pipes and thereby cause the O-rings to deform and establish a fluid tight seal between the pipes.

Abstract: A tubing connector non-releasably connected to a tube of tubing string for use downhole in oil and gas well operations, the connector comprising connector body (1) with an end portion fitted concentrically within or over a corresponding end of the tube (2), the end portion having a plurality of depressions (12) coinciding with corresponding depressions (10) on the corresponding end of the tube (2) whereby the connector body (1) and tube (2) are connected together, the depressions (10) and the tube (2) having been formed by localized plastic deformation of the walls of the tube (2).

Abstract: Methods and apparatus are provided for obtaining a secure mechanical connection and a pressure-tight seal in the overlapping area of two telescoping tubular bodies. The two bodies, including the overlapping area, are radially expanded to increase the inside diameter of the bodies. The expansion forces an annular seal in the overlapping area into a pressure-sealing engagement between the bodies. A string of pipe assembled from joints secured to each other by telescoping, threadedly engaged expanded pin and box connections may be radially expanded into a surrounding well bore to provide a cased well having an internal diameter greater than the original internal diameter of the pipe string. The seal in the connection comprises an annular elastomeric seal ring and an annular Teflon spacer ring carried in a specially dimensioned groove formed in either the box or the pin, or both members of the connection.

Abstract: A pipe joint assembly includes a cylindrical pipe and a pipe element having a generally cylindrical terminal portion for receiving the end of the pipe. The terminal portion is formed with a roughly straight open ended channel extending in a direction tangential to, but intersecting, the cylindrical pipe. A lock pin is insertable along the open ended channel so as to cause local inward deformation of the end, thereby locking the end and the pipe element together. The lock pin has a parallel-sided shaft portion of minimum transverse dimension d and a tapered portion of length l tapering to a point, where l is no less than twice d and is no greater than four times d. This geometry facilitates insertion of the lock pin through a combined linear and rotational displacement which is highly effective for ensuring effecting and reliable interconnection.