Abstract: Disclosed are systems and methods for connecting a hydraulic fracturing fluid source to various wells at a given well site. In general, use of disclosed systems and methods provide for repositioning (refocusing) the hydraulic fracturing operation amongst multiple wells may be achieved. In one example, a system to reroute fracturing fluid from a source to various wells at a well site may be provided. The use of adapters and quick clamp connections allow hydraulic fracturing fluid to be rerouted between various wells in a manner to decrease the cost and reduce hazards associated with changing hydraulic fracturing locations. Modular components of the system (and an overall modular design of the system itself) may allow a centralized manifold to be relocated to various locations at one or more well sites.

Abstract: Aspects of the present disclosure relate to spool assembly implementations and related methods for fluidly connecting wellheads. In one implementation, a spool assembly for fluidly connecting wellheads includes a first end flange, a second end flange, and one or more pivotable connections positioned between the first end flange and the second end flange. Each respective pivotable connection of the one or more pivotable connections includes a connection tubular having an outer spherical surface, and a bearing tubular having a spherical end disposed about the outer spherical surface of the connection tubular. Each respective pivotable connection of the one or more pivotable connections includes a socket flange tubular disposed about the spherical end of the bearing tubular, and a shoulder flange tubular disposed about an outer shoulder of the connection tubular. The shoulder flange tubular is coupled to the socket flange tubular.

Abstract: Embodiments described herein provide an expanding and collapsing apparatus and methods of use. The apparatus includes a plurality of elements assembled together to form a ring structure about a longitudinal axis. The ring structure is operable to be moved between an expanded condition and a collapsed condition by movement of the plurality of elements. At least one set of structural elements are operable to move between the expanded condition and the collapsed condition by movement of a first end in an axial direction, and by movement of a second end in a radial dimension. In certain embodiments, the plurality of elements includes at least one set of structural elements extending longitudinally on the apparatus and operable to slide with respect to one another. Applications of the embodiments described herein include oilfield devices, including anti-extrusion rings, plugs, packers, locks, patching tools, connection systems, and variable diameter tools run in a wellbore.

Abstract: A hydraulic fracturing system for fracturing a subterranean formation includes an electric powered pump having an inlet and an outlet, the outlet coupled to a well associated with the subterranean formation and powered by at least one electric motor. The system also includes a fluid source, coupled to the inlet of the electric powered pump, the fluid source providing a slurry for injection into the subterranean formation. The system further includes a hose extending between the fluid source and the electric powered pump, the hose being flexible and having a first diameter. The system includes a fitting between the hose and the electric powered pump, the fitting having a first end for receiving the hose at the first diameter and a second end for coupling to the electric powered pump at a second diameter, the second diameter being larger than the first diameter.

Abstract: A rotorcraft and a connecting structure for an arm and an airframe of a rotorcraft are provided. The connecting structure includes: a fixed sleeve pipe configured to extend out from a circumferential edge of the airframe; an insertion head configured to be disposed to the first end of the arm and configured to be inserted into the fixed sleeve pipe; a lock sleeve configured to be fitted over the arm and having an insertion portion configured to be embedded into the insertion groove; and a lock nut configured to be fitted over the arm and configured for being in threaded connection with the fixed sleeve pipe.

Abstract: An adapter includes a plurality of individually separable collars that allow for easy, on-site adjustment of the length of the adapter based on a measured offset of an outlet of a water supply assembly to which the adapter is attached. An exterior of each collar is configured to sealingly engage the outlet of the water supply assembly, such that the adjustment to the length of the adapter does not compromise the ability of the adapter to be sealingly coupled to the water supply assembly. A slip fitting provided along a downstream end of the adapter allows the plumbing fixture to be installed flush against a wall in a desired orientation, without compromising the sealing engagement between the adapter and either of the plumbing fixture or outlet opening.

Abstract: A cleaning tool comprising an extendable pole of two or more telescoping tubular members of a non-circular cross-section and having locking-clamping devices with the same form of noncircular cross-section. The telescoping tubular members are connected together through a clamping device, wherein one open end of the clamping device comprises an internal surface matching an external surface of a thicker tubular member and the second end of the clamping device comprises an internal surface and further comprises a notch extending through the length of the second end of the clamping device, and a lever mechanism, wherein the second end of the clamping device is arranged for diameter reduction upon performing a clamping action with said lever. The free end of the thinnest tubular member comprises means for attaching a cleaning tool.

Abstract: Described are methods, apparatuses, and systems for securing a vacuum appliance to a vacuum device including a first locking adapter that includes a tab and a second locking adapter that includes a receiving slot. The first and second adapters form an airtight seal when the tab is received by the slot by rotating one adapter relative to the other. The receiving slot can include a slot terminus to restrict rotational movement of the first adapter relative to the second. The apparatus can further include a securing slot that can secure the tab within a slot terminus such that a portion of the second locking adapter adjacent to the receiving slot is adapted to flex. Through the described rotation, the first and second adapters tighten and become rigid thus minimizing both the slippage between these two elements and the leakage between the vacuum device and any attached appliances.

Abstract: A coupling to connect a pipe end portion to another pipe end portion or to a valve or other fitting wherein the pipe end portion includes a circumferential shoulder includes a flange around an opening into the coupling through which the end portion of the pipe including the circumferential shoulder can be inserted into the coupling. A wheel with a radial channel therein is rotatably mounted on the flange with the flange received in the radial channel which is wide enough to also receive wedge members therein alongside the flange. Once the pipe end with the shoulder is received in the coupling, wedge members are inserted into the radial channel through a cut opening in a portion of the wheel to extend into and reduce the diameter of the opening to hold the shoulder in the coupling. A seal is provided in the coupling to seal the coupling against leakage.

Abstract: In one embodiment of a method for reducing vertical position errors of an aircraft, the displacement of the aircraft from a commanded vertical path may be determined. A determination may be made as to whether a magnitude of a vertical path error meets criteria. No more steps of the method may be followed if the vertical path error does not meet the criteria, while the vertical path error may be converted into a delta lift command if the vertical path error meets the criteria. The delta lift command may be limited. The delta lift command may be converted into lateral surface position commands for control surfaces. The lateral surface position commands may be communicated to lateral control surface actuators to move the control surfaces according to the lateral surface position commands.

Abstract: A modular, adjustable system for distributing fluids to one or more wellbores includes a plurality of modules that can be arranged at a well site to create an appropriate manifold to enable selective fluid communication between a fluid pumping system and the one or more wellbores. The modules each include a fluid inlet, a fluid outlet and a valve coupled therebetween to selectively permit or restrict fluid flow between the respective fluid inlets and fluid outlets. The modules are configured to be readily maneuvered, coupled and locked to one another at a well site.

Abstract: A sensor has a receiver device (16) is configured such that the sensor holder (44) is rotatable with respect to the installation body (14) and is adjustable by a telescopic extension or retraction or the sensor holder (44). The receiver is rotatable with respect to the installation body and tiltable with respect to the installation body, and has clamping elements (18) for the sensor holder (44). The clamping elements (18) can be clamped tight by means of a cap nut (20) which engages into a thread (24) of the receiver device (16). The cap nut (20) has a first sealing ring (30) at an opening (28) and contacting the sensor holder (44), and has a second sealing ring (34) at the oppositely disposed opening (32) and contacting the installation body (14). The sealing rings (30, 34) are connected without joints to the cap nut (20).

Abstract: A sealing apparatus has a first cavity comprised of two separable sections for fastening about a second cavity, and the first cavity comprises a first flange that extends about the cavity's top periphery. The sealing apparatus further has a deformable seal located adjacent an inner surface of the first flange and a clamping seal flange fastened to the first flange adjacent and atop the deformable seal such that the deformable seal deforms as the clamping seal flange is tightened thereby creating pressure on side walls of the second cavity forming a seal.

Abstract: A vacuum cleaner suction pipe (1) having first, second, and third pipe segments (2, 3, 4), respectively, the pipe segments (2, 3, 4) being telescopically connected to one another, the first pipe segment (2) being located between the second pipe segment (3) and the third pipe segment (4). There is a control device (5), and the pipe segments (2, 3, 4) are mechanically in interaction with one another via the control device (5) so that when the second pipe segment (3) or the third pipe segment (4) is moved manually in an axial direction relative to the first pipe segment (2) the respective other of the second or third pipe segment (3, 4) is moved at the same time by the control device (5).

Abstract: Extensible mouth bellows for acceleration of flame, as in kindling a campfire, includes four successively nested tubes in longitudinally movable, frictionally retarded movable relation over a limited range between extended and retracted configurations. Shims cooperate with the tubes and with inwardly constricted ends thereof to directionally stabilize the arrangement of tubes and to prevent separation in forward or rearward direction.

Abstract: A retractable pipe structure of an air blow gun includes an extension pipe, a lock unit and a blow pipe. The extension pipe has a through hole therein for insertion of the blow pipe. The lock unit includes a connection member. One end of the connection member is connected to the extension pipe. The other end of the connection member is connected to a lock member. An elastic collet and a seal member are provided in the lock member. The end of the connection member has an inner inclined surface which is inclined inward. Because the inner inclined surface guides the seal member and the elastic collet pushes the seal member, the seal member is deformed to tighten the blow pipe and to seal the extension pipe. The elastic collet can clamp the blow pipe and won't damage the blow pipe.

Abstract: A retractable pipe assembly of an air blow gun includes an extension pipe, a lock unit and a blow pipe. The extension pipe has a stepped through hole which has a large diameter part and a small diameter part for insertion of the blow pipe. One end of extension pipe has an inner inclined surface which is inclined inward. The lock unit includes a lock member. The lock member is connected to the extension pipe. An elastic collet and a seal member are provided in the lock member. Because the inner inclined surface of the extension pipe guides the seal member and the elastic collet pushes the seal member, the seal member is deformed to tighten the blow pipe and to seal the extension pipe. The elastic collet can clamp the blow pipe and won't damage the blow pipe.

Abstract: An apparatus and method for producing pressure signals which indicate when weight-on-bit, during the drilling of a wellbore, exceed a predetermined, upper limit. The apparatus includes a first mandrel and a second mandrel that inserts into and is axially moveable within the first mandrel. The position of the second mandrel may be dependent upon the balance of a biasing member's biasing strength and the weight-on-bit exerted on the drill bit. If weight-on-bit values overcome the biasing strength of the biasing member, the second mandrel may move uphole within the first mandrel and create a pressure signal that is detectable at surface so that the operator is made aware that weight-on-bit values exceed the upper limit.

Abstract: A wand for an appliance includes first and second tubes and a support mechanism, in which the second tube slides telescopically within the first tube along a common axis. The first and second tubes are arranged to be selectively secured to one another in an extended position or to allow movement therebetween and the support mechanism is located between overlapping portions of the tubes. The support mechanism includes tapered portions arranged to provide support between the tubes at separate points along the common axis of the tubes. By supporting adjacent tubes at a plurality of points along the common axis, the tubes are held more firmly with respect to one another. One tapered portion is able to move with respect to the tubes along the common axis, which reduces play between the tubes.

Abstract: A riser system (202) comprises a riser (204) to be secured between a floating body (206) and a subsea location (209). The riser comprises a composite material formed of at least a matrix and one or more reinforcing elements embedded within the matrix. In use, the riser (204) comprises an upper portion (214) extending from the floating body (206) and having a region arranged to be in tension, a lower portion (216) extending from the subsea location (209) and having a region arranged to be in tension, and an intermediate portion (218) located between the upper and lower portions (214, 216) and having a region arranged to be in compression. A flow-line jumper (302, 402) configured to be secured between two subsea locations, a flow-line jumper arrangement comprising a flow-line jumper (302, 402) and a method of forming a flow-line jumper 302, 402 are also disclosed.

Abstract: A slip joint seal for a slip joint that includes an outer pipe and an inner pipe. The slip joint seal includes a clamshell clamp with an upper portion and a lower portion mateable to one another to form a hollow cylindrical ring. The ring has a base portion, a protruding portion, an inner surface, and an outer surface. A band fits around the base portion for securing the upper and lower portions to one another around the slip joint. The slip joint seal has a ceramic fiber filament fiber with a first portion that fits within the base portion and surrounds a portion of the slip joint around a slidable interface. A second portion fits within the protruding portion and fills an annular channel of the slip joint. The clamshell clamp and the filament discourage leaking from the interface between the inner pipe while allowing relative movement between the inner pipe and the outer pipe.

Abstract: A movable coupling for a pipeline, which can be applied in aviation and aerospace. The coupling includes a dip pipe, a counter piece and a displaceable component. The counter piece has a passage, into which the dip pipe is inserted. The counter piece has a holder extending from the passage. The component includes a clearance that the dip pipe extends through. A portion of the displaceable component is received in the holder so the displaceable component can be displaced relative to the counter piece in a direction not parallel to the longitudinal axis of the dip pipe. When the dip pipe moves relative to the counter piece, the displaceable component is tight against the dip pipe and also against the counter piece. A tank arrangement includes a tank with a pipeline connected to the tank and including a movable coupling.

Abstract: An apparatus for changing a length of a pipe, the pipe including first and second pipe portions each having an interior, includes a cylinder having a first end wall and an open end, the cylinder being connectable to the first pipe portion. The apparatus also includes a piston having a second end wall, the piston being receivable in slidable and sealable engagement with the cylinder, the piston being connectable to the second pipe portion, wherein the cylinder and the second end wall define a chamber physically isolated from the interiors of the first and second pipe portions, the chamber being adapted to receive a control fluid for displacing the piston relative to the cylinder to vary a distance between the first and second pipe portions while permitting fluid communication between the first and second pipe portions, the chamber including a cushioning region in communication with the chamber.

Abstract: An engine exhaust system comprises duct pieces and a thermally expandable sealing joint for interconnecting their adjoining ends. The sealing joint comprises a tubular body including a first axial end portion, a second axial end portion, and a bridge portion extending therebetween. The first end portion is at least partially positioned within a female recess of the first duct piece and the second end portion is at least partially positioned with a female recess of the second duct piece. The bridge portion can extend across a gap and/or it can be positioned partially within female recesses. Upon thermal activation, the sealing joint radially expands permanently to engage the inner radial surfaces of the duct pieces.

Abstract: A sealing apparatus adapted for use in a pressure vessel such as a synthesis gas cooler. The sealing apparatus is of a segmented plate construction formed around an outer wall section of a conduit means of the pressure vessel that defines at least part of a passage for receiving effluent from a gasification process. Pressure responsive mechanisms are provided on the plate segments to maintain the pressure difference across the sealing apparatus within the acceptable operating limits as well as to permit instantaneous pressure release to prevent damage to the pressure part assembly or cage. The seal is also maintained continuously through the differential growth movement between the conduit means and the pressure vessel during heat up and cool down cycles.

Abstract: An extension pole including an outer tube connected to a water source and an inner tube positioned in a telescoping relationship to the outer tube. The inner tube includes a series of spaced apart openings that are engaged by a biased locking member positioned on the end of the outer tube. The locking member may be manually released by activation of a release button connected to locking member, thereby allowing inner and outer tubes to be moved with respect to each other. The extension pole also includes a locking nut assembly positioned on the free end of the inner tube for attaching the tube to cleaning tool and preventing rotation of the cleaning tool during use.

Abstract: A coupling assembly including a union member having a first receiving portion with internal threads and a second receiving portion with oppositely oriented internal threads, a first coupling member (e.g., a hose adapter) having external threads that are threadingly engaged to the internal threads of the union member, and a second coupling member (e.g., an elbow fitting) having external threads that are threadingly engaged to the oppositely oriented internal threads of the union member. Upon rotation of the union member, the length and/or phase angle between the first and second coupling members changes.

Abstract: A device which is expandable to engage the interior of a tube, for example the casing of an oil well, comprises first and second tubular members in partial telescopic engagement with each other, the first tubular member having an end region which is received on the second tubular member and which is expandable radially outwardly to engage the interior of the tube. The second tubular member has tapered regions which, when forced into the end region, will cause radial expansion of the end region. The taper angle of the second tapered zone is less than the taper angle of both the first tapered zone and the third tapered zone. The fourth tapered zone preferably has a taper angle which is greater than that of the second tapered zone and less than that of the third tapered zone. In one embodiment, the tapered zones have respective taper angles of 15°, 1°, 5° and 1.25°.

Abstract: A length adjustable conduit has a hollow tubular body and a hollow tubular shaft coaxially disposed in fluid tight communication with the hollow tubular body. The conduit further includes an adjustment mechanism for adjusting the combined length of the tubular body and tubular shaft.

Abstract: A slide coupling fitting for connecting a tubular conduit and the method of use are provided. The fitting includes a tubular body, two opposing open ends, and an external threaded section on an exterior of the tubular body adjacent to each open end; and two tubular sliding couplers, each having an internal diameter slightly larger than an external diameter of the tubular body, and each being connected to one of the open ends of the tubular body, respectively, and coaxial with the tubular body. Each tubular sliding coupler has an internal threaded section adjacent to an inner end which is closer to a longitudinal center of the tubular body, and a smooth interior at an opposing outer end for slidably engaging a tubular conduit. The internal threaded section is complementary to the external threaded section of the tubular body for mutual engagement.

Abstract: A compressed seal expansion joint for fluidically connecting in a sealed relationship adjacent ends of two conduits adapted for carrying fluids of varying temperatures, the expansion joint comprising telescopically arranged outer and inner pipe members adapted to be connected to each of the conduits, the outer pipe member defining an annular packing chamber opening through its inner surface for containing at least two cylindrical guide rings disposed at opposite ends of the chamber, the rings being of a generally rectangular cross section having their long faces longitudinal to the members axis and selected of an elastic and semi-plastic packing composition pressurized by tensioned hoop bands circumscribing the outer pipe member and selected to elastically deform the outer pipe member and communicate a circumferentially compressive force to the guide rings so as to create bearing and frictional loadings and seal between guide ring surfaces and the pipe member surfaces during axial and rotational relative pipe

Abstract: A length adjustable conduit has a hollow tubular body and a hollow tubular shaft coaxially disposed in fluid tight communication with the hollow tubular body. The conduit further includes an adjustment mechanism for adjusting the combined length of the tubular body and tubular shaft.

Abstract: A variable diameter cylinder made from a sheet having first and second edges that are opposite to each other and that slideably connect with each other to form a helical joint of a cylinder such that sliding the edges of the sheet along the joint varies a diameter and length of the cylinder. When marked with a scale, the cylinder acts as a measuring device that is both highly accurate and easy to use. A helical-based scale can be used alone, or a linear scale can be used in combination with a Vernier scale.

Abstract: A compressed seal expansion joint for fluidically connecting in a sealed relationship adjacent ends of two conduits adapted for carrying fluids of varying temperatures, said expansion joint comprising telescopically arranged outer and inner pipe members adapted to be connected to each of said conduits, said outer pipe member defining an annular packing chamber opening through its inner surface for containing at least two cylindrical guide rings disposed at opposite ends of said chamber, said rings being of a generally rectangular cross section having their long faces longitudinal to the members axis and selected of an elastic and semi-plastic packing composition pressurized by tensioned hoop bands circumscribing said outer pipe member and selected to elastically deform said outer pipe member and communicate a circumferentially compressive force to said guide rings so as to create bearing and frictional loadings and seal between said guide ring surfaces and said pipe member surfaces during axial and rotational

Abstract: A telescopic tube with water supply is equipped with a minor tube, a major tube that are connected to each other by a tubular coupling device which has a registration end and a connecting section, the former is engaged with one end of the minor tube and the latter is engaged with the top end of the major tube. A guard cap is secured to the top end of the major tube which serves to prevent the minor tube from easy disengagement from the major tube in case of excessive extension adjustment. The connecting section of the tubular coupling device has a cone shaped configuration with a spiral thread track defined thereon and terminates in a stop board.

Abstract: The present invention relates to a joint structure between a filtration apparatus and a filtration membrane module, which is characterized in that a cap with a pipe is disposed on at least one end of a filtration membrane module using a cap nut capable of being screwed into a thread groove formed on the outer periphery of the end thereof, said pipe of the cap being inserted into and pressed against one end of a joint capable of controlling connection length at both ends, and a branch pipe of a header pipe of the filtration apparatus being inserted into and pressed against the other end of said joint. According to the present invention, there can be obtained such a joint structure that requires fewer components for connection, has a simple construction at connections, and does not cause any leakage.

Abstract: A tubular connector adapted to extend between two tubular components comprising a tubular body having an internal diameter, a first free end including an annular radial flange having a tapered surface adapted to engage a complementary seating surface on a first of the two tubular components, the internal diameter remaining constant through the first free end; and a second free end having an annular bulbous shape adapted to seat within a cylindrical end of a second of the two tubular components.

Abstract: A device and a method for coupling a fluid rail to injectors by a connector, the connector having telescopic tube members extending between a first end and a second end, a sealing member disposed between a first tubular member and the fluid rail, a sealing member disposed between a second tubular member and the injector. The tubes are urged apart by either hydraulic pressure or by a resilient member to form a tight seal between the hemispherical distal ends of the connector to the respective fluid rail outlet and injector inlet. This invention also permits the coupling of a fluid rail to at least one fuel injector by providing a fluid rail, a flexible coupler on the injector inlet, mounting the nested or telescopic connector into both the flexible coupler and the injector inlet, inserting the fluid rail onto the connector and then urging the telescopic connector apart to form a tight seal against the inlet and the outlet.

Abstract: A tubular connector adapted to extend between two tubular components comprising a tubular body having an internal diameter, a first free end including an annular radial flange having a tapered surface adapted to engage a complementary seating surface on a first of the two tubular components, the internal diameter remaining constant through the first free end; and a second free end having an annular bulbous shape adapted to seat within a cylindrical end of a second of the two tubular components.

Abstract: A deformable fluid supply line for use on a semiconductor fabrication machine is described which includes a generally S-shaped expandable joint connecting between two straight conduit sections for providing full communication thereinbetween and for providing stress absorbing characteristics such that the expandable joint can be stretched or otherwise deformed by at least 2 cm without breaking connections with the two straight conduit sections. When the generally S-shaped expandable joint is provided with a length of at least 10 cm, a deformation of at least 3.5 cm can be tolerated by the expandable joint without causing failure or otherwise damages in the connections with the two straight conduit sections. The deformable fluid supply line can survive an earthquake of the magnitude of Richter 5 scale. The invention further discloses a method for connecting a deformable fluid supply line to a fabrication machine by using an S-shaped joint connected in between two straight conduit sections.

Abstract: Thick-walled steel pipe is corrugated for the purpose of managing axial load when the pipe is used in an earth-restrained application. For example, the pipe may be used as casing in a cyclic steam stimulation well, where the axial loads are induced as the casing is heated and cooled.

Abstract: The invention concerns a telescopic tube (10), in particular for sprinkler systems, comprising an outer tube (12) and an inner tube (14) which is movable relative to the latter and has an inner end piece (36) which extends inside the outer tube and has an outer diameter which is larger than the inner tube in their adjoining regions. The telescopic tube (10) further comprises a securing element (26) which surrounds the inner tube and is provided for the outer tube, the outer end (22) of the latter extending in said securing element (26). According to the invention, in order to provide a precise connection between the inner and outer tubes using precision screw machine parts in particular, the outer end (22) of the outer tube is widened and extends inside an annular mounting (24) of the securing element which in turn comprises an outer edge (34) which extends externally along the outer tube and is deformed in the direction of the outer end of the outer tube when the latter has been fitted in the mounting.

Abstract: A metal diaphragm is provided which acts as a spring while defining a flow path. A restraint limits upward movement of the diaphragm during transient motion. Downward movement is resisted by a Belleville spring.

Abstract: A plastic or polytetrafluoroethylene split seal ring having highly flexible, annularly extending, axially spaced apart side walls is disclosed for sealing opposed, concentrically overlapping open end portions of a pair of gas conduits together or for sealing a sleeve of a flexible coupling to end portions of two opposed, spaced apart gas conduits is disclosed. The ring includes an annularly extending base portion, a pair of axially spaced apart, annularly extending side walls connected to and along opposite sides of the base portion. The side walls project radially beyond a radially inwardly or radially outwardly facing surface of the base portion to form a groove in which an expansion or contraction member can be disposed to effect a gas tight seal of the ring against and around a surface of one of the conduits.

Abstract: This disclosure relates to an expansion joint to connect two or more concentric bodies that are heated/cooled to different temperatures for the passage of liquid or gases. When the connecting portion is at an angle not in plane with the concentric bodies, the design allows for the gravity drainage of fluids and slurries from one connecting body to another without pooling or damming.

Abstract: A nozzle assembly for a spray head (10) having a tubular body (11) that has an inlet (13) thereto and an outlet (14) therefrom, has a nozzle member (15) and a core member (16). The nozzle member (15) has a central chamber (20) adapted to be in fluid communication with the inlet (13) of the spray head (10) and a plurality of outer chambers (22) in communication with the central chamber (20) and adapted to be in fluid communication with the outlet (14) of the spray head (10). The nozzle member (15) and/or the core member (16) has means for spacing the core member with respect to the nozzle member (15).

Abstract: A wellhead assembly provides a connection between a protruding wellhead pipe of a landfill and piping that leads to treatment, disposal, or recovery equipment, or the like. The wellhead assembly includes a first substantially hollow cylindrical member that has a first open end, a second closed end, and a receiving cavity therein. The closed end has an aperture through it that is smaller in diameter than the diameter of the protruding wellhead pipe, and the first substantially hollow cylindrical member is capable of slidably receiving the protruding wellhead pipe within the receiving cavity. The wellhead assembly also includes a second substantially hollow cylindrical member having a first open end and a second closed end. The first open end is coupled to the second closed end of the first substantially hollow cylindrical member, and is positioned so as to surround and enclose the aperture in the first substantially hollow cylindrical member.

Abstract: A tubular extension, particularly for electric household appliances and cleaning machines in general, comprising at least two tubular elements telescopically associated with each other, a first one of these tubular elements being associated coaxially with a second one having a smaller cross-section and being slideable inside the first tubular element, one of these first and second tubular elements having at least one sliding portion whereat the outer or inner lateral surface is shaped so as to form at least one step, wherefrom the cross-section gradually increases radially and along a given peripheral arc, a longitudinal cavity being formed at the peripheral arc, and a tooth having a similar shape fitting snugly and reversibly in the cavity after sliding over a portion of the surface relative to the peripheral arc, the tooth being formed at the inner or outer surface of the other one of the first and second tubular elements on the side where mutual coupling occurs upon assembly.

Abstract: A vacuum cleaner tube shaft having a first tube shaped part (11) and a second tube shaped part (12). The first part is slidably arranged in the second part and is adapted to be releasably locked to the second part in a desired position. The second part (12) includes two sections (15, 16) which are connected to each other via a pivot (17). When the first part (11) is inserted in the two sections (15, 16), the two sections are aligned with respect to each other. When the first part is inserted into only one section (15) of the second part, the sections (15, 16) can be positioned in a desired angular position with respect to each other.

Abstract: A pipe fitting adapted to be installed in an aperture in a wall of a fluid container, comprises inner and outer co-axial sleeve members interconnected for relative axial movement and a split, helically wound, washer. The inner sleeve member has an end portion insertable through the aperture, and the outer sleeve member has an annular bearing surface adjacent to the end portion adapted to overlie a first one of two opposed surfaces of the wall around the periphery of the aperture. The split washer is retained to and extends around the end portion opposite the bearing surface, and is of larger outer diameter than the aperture but is insertable therethrough by winding so as to overlie the second of the opposed surfaces of the wall.