Plural seals

A coupling unit insertable between a first and a second pipeline, flexible or hose pipe or the like. Said coupling unit allows relative movement between the pipelines and comprises an outer part or conduit member serving as a muff and attachable to the first pipeline. A suitably tubular shaped inner...     

A composite seal for joining a down flow drain pipe to a shower pan has a drain fitting provided with a tapered rim overlying the shower pan and a packing nut for holding it in place. A flanged lower portion of the fitting forms an annular pocket around the drain pipe in which a series of three rings...     

Repair fittings are provided sealing ruptures or leaks in existing piping systems. The fittings are economical to produce and can be simply installed to provide effective and reliable leak protection. The fittings are of the gasket type and include a pair of substantially identical housing halves which...     

A dynamic pipe coupling for connecting the ends of two pipes so as to prevent axial separation thereof but which permits axial flexing therebetween. The coupling includes two coupling members, each of which is connectible at one end thereof to the end of one of the pipes. One member has attached thereto...     

A rotatable head sprinkler apparatus incorporating a lower bearing seal and having a swivel device for connection to a source of water under pressure, a spindle connective device and a self-powered rotary sprinkler head of the type used for irrigation of large circular areas.

A coupling device adapted for connecting conduits or the like which carry pressurized fluid and essentially embodies first and second coupling members, a pair of sealing members and retaining means. The first coupling member is arranged to be connected to the conduit and includes first and second spaced...     

A device for non-rigid connection of two rigid cylindrical pipes comprises the combined use of flexible double-lipped gaskets and toroid flexible gaskets surrounding a bulb-shaped zone formed in one of the pipes. The device is particularly useful for fastening fragile tubes containing light emitters...     

A tubular clamping and sealing coupler for underwater oil or gas pipelines or the like operating under high pressure, providing a fluid-tight joint between the sections of the pipelines, one section of the coupler being firmly secured to the pipe on which it is mounted while the other section of the...     

A light walled circular metallic conduit including a first conduit member and a second conduit member. An expanded section is at one end of the first conduit member and an end of said second conduit member is snugly telescoped within said expanded section of said first conduit member. The expanded section...     

A quick-connect tubular coupling for a pair of tubes one of which has an end portion telescopically disposed within an end portion of the other. An annular cage is externally mounted on the one or inner tube in axially spaced relation to the free end of its end portion. The cage is held on the one tube...     

Valve apparatus is disclosed for discharging pressurized fire extinguisher fluid from a container. A valve housing includes a valve body and manifold between which a diaphragm which is removably mounted to facilitate field replacement. The diaphragm comprises a semi-spherical shell which is mounted across...     

An improved pressure type connection on stepped-thread Hydril-type tubing and casing tool joints is disclosed, wherein a secondary sealing means is included between the stepped threaded areas of the Hydril-type connector. The secondary sealing means includes an annular ring of relatively rigid, internally...     

A thread protector and seal device, suitable for use with automated shell lling equipment utilizes a flanged semi-rigid tubular member having a plurality of longitudinally disposed slots on one end thereof to facilitate insertion into the nose end of an internally threaded projectile. A compliant member...     

A tube fitting of the push-pull type wherein the tube end is connected to the fitting by a simple inward insertion thereof, and withdrawal of the tube is effected by a simple withdrawal movement thereof upon manual rearrangement of the fitting components. The fitting includes a spring finger locking...     

A sealing assembly for sealing the annulus between a wellhead and a casing hanger in which the assembly includes a recess for receiving a sealing element in which the recess includes a tapered surface and a tapered seat for coacting with a seal for setting the seal with a small setting force. A resilient...     

A fluid conducting swivel joint is disclosed which has a sealing system effective against the leakage of fluids of extreme temperature. The joint consists of two housings mounted for relative rotation about an axis, the housings having a fluid passage therethrough. A first annular sealing chamber, having...     

A coupler which is for tubing and which has a tube receiving bore therein. A sealing ring, spacer ring and lock ring are coaxially located within the coupler bore. When a tube is inserted into the coupler bore, the sealing ring makes contact between the coupler and tube with the spacer and locking ring...     

Apparatus is disclosed for protecting the end face of an annular blowout preventer or the like from corrosion. In one embodiment, both a ring groove and a circle of tapped stud holes are protected in a low pressure environment by parts on a bell flange to be connected above the annular preventer, and,...     

A hose and pipe coupling is provided having a coupling head and a nozzle which can be inserted into the coupling head, and which is lockable therewith by a locking element. The locking element includes a spring-elastic ring having a slit and onto which are formed two oppositely-directed, arcuate spring...     

The conduit structure comprises an outer tubular housing having a tubular inner member disposed therein with a first end of the inner member being positioned in the medial portion of the outer housing and retained therein by means of an outwardly extending flared portion on the first end of the tubular...     

A filter assembly for extruded polymer melts is described which comprises a filter having retained between inlet and outlet manifolds with a contact pressure that can be varied. A primary seal device between the manifold and the housing is located in a rabbet in either the housing or the manifold at...     

The invention relates to means and methods for rendering fire-safe, or more fire-safe, steel or like pipework which is lined with a plastic or like liner. At joints in such pipework, the liner is brought out over the flange face to form the actual seal. Consequently, the liner is vulnerable to fire or...     

A pipe coupling for joining interengaging ends of a pair of pipes in axial alignment comprised of a pair of semi-circular substantially identical sections adapted to mate with one another to hold the pipe ends therein. Each of the sections have cooperating locating flanges engaging corresponding surfaces...     

This invention provides a fluid fitting for joining two tubular members in a fluid-tight relationship, the fitting including a sleeve having outer end portions with ridge means on the inner surfaces thereof for retaining a tube upon being compressed inwardly around the tube, sealing areas inwardly of...     

A Swivel Joint for use on producing wells which are being pumped, having an upper and a lower annular member, in juxtaposition, with a coil spring separating the members, the lower member having a curved external face to receive, in line contact, the inside wall of the retaining member, which is engaged...     

A tube joint configuration and method of joining tubing wherein a curable adhesive is arranged on one portion and a resilient sealer is arranged on a second portion on the end portion of the male tube prior to its being telescoped with the female tube. The telescoped portion of the tubes is deformed...     

There is disclosed a pipe repair coupling including a barrel formed centrally with a hollow cylinder for telescopical receipt therein of a hollow piston. The barrel is surrounded by a protective sleeve and is formed at one extremity with a first fitting and at the opposite extremity with a neck portion....     

A device for connecting two pipes for carrying abrasive material under high pressure employs a flange member welded to an end of one of the pipes and a ring member welded to an end of the other pipe. The pipes and both members have the same internal diameter. One or both pipes may be cold formed into...     

A swivelable quick connect assembly for use with tubular conduits is disclosed as comprising a housing having an axial bore for receiving one end of the conduit, an elastomeric ring-like seal is disposed in the bore for providing a fluidtight seal between confronting portions of the conduit and the housing,...     

A flexible joint for conduit includes inner and outer conduit parts having a common longitudinal axis. The inner conduit part includes a spherically curved end portion received in the outer conduit part and having inner and outer surfaces. Inner and outer ring assemblies carried by the outer conduit...     

A coupling assembly for coupling an elongated cylindrical element such as a pipe section or shaft to a second element such as another pipe section or shaft. A shallow circumferential groove is formed on an outer circumferential surface of the cylindrical element at a position spaced a moderate distance...     

A rotary coupling for conducting high pressure liquid from a stationary source to a rotatable utilization device is disclosed. The coupling includes a hollow shaft, a mounting assembly having a cavity into which one end of the shaft extends and roller bearings for enabling rotation and preventing axial...     

The present invention in a rotary coupling or swivel is arranged for maintaining together, respectively, stationary and rotating pipes wherethrough a fluid under pressure is passed and involves an outer stationary body with an inner body journaled therein. The two bodies are held together by positioning...     

A coupling of the type including a flexible tube, an interiorly threaded nut member apertured to receive the tube, a cooperating exteriorly threaded nipple member, a pair of O-ring seals, and a separate tube-gripping member. The tube-gripping member includes an annular wall portion having an annular...     

Male and female parts (1, 2) are included in a coupling device which is provided with locking members for said parts. The locking members comprise a lock nut (3) which is adapted to be fitted on the female part and a locking ring (4) which can be inserted between two opposite locking surfaces (1a' and...     

Swivel connector apparatus for use in connecting lines together which carry a pressurized fluid and which require relative rotation therebetween is disclosed which includes an outer body having a bore formed axially therein which extends entirely therethrough. An inner body is configured for an interfitting...     

A fluid-conveying coupling assembly in which a plurality of torsionally deflectable seal rings establish a redundant seal between interconnected coupling structures and in which each seal ring is torsionally deflected to its seal-establishing condition by engagement with just one pair of formations on...     

A quick-connect coupling for connecting and hydraulically sealing two tubes that carry fluid has a spring member fixed to the end of one tube and a latch member having inclined surfaces formed at the end of the second tube. The second tube is fitted over the first tube and is inserted within the spring...     

A breech block hanger support member for a subsea wellhead assembly for wells having a working pressure up to approximately 15,000 psi. The assembly includes a wellhead, the support member, a packoff for sealing the support member, and one or more other casing hangers supported by the support member....     

A pipe joint in which a metal-to-metal seal is provided on the exterior of the pipe, a torque shoulder provides a further metal-to-metal seal and a still further seal is provided by a resilient ring. The box is protected against ballooning which might result in jump out of the threads by proportioning...     

An improved pressure type connection on stepped thread Hydril-type tubing and casing tool joints is disclosed, wherein a secondary sealing means is included between the stepped threaded areas of the Hydril-type connector. The secondary sealing means includes an annular ring of relatively rigid, internally...     

A fluid swivel coupling is provided for interconnecting two fluid conduits so that they may swivel or rotate about their common axis. The coupling includes a swivel body connected to one fluid conduit and adapted to accept for rotational movement therein a spindle which is connected to a second fluid...     

A fluid coupling is described. The coupling includes a connector means (12, 22) threaded (12C, 22C) for connection and rotatably mounted on conduit means (10, 20) during installation and in use. The connector means can be turned into a corresponding threaded opening, particularly an opening located in...     

A pipe fitting for interconnecting concentric pipes together to a gas meter unit includes a standard insulated O-ring union internally modified so as to include therein a substantially frusto-conical recess for mating engagement with a correspondingly shaped neoprene compression seal. The neoprene compression...     

A pipe joint comprising a joint body provided with an insertion hole into which a pipe to be joined is inserted to be retained and a screw member adapted to engage with a fixing hole bored in the joint body and to form a recessed part on the outer periphery of the pipe by the engagement thereof with...     

A seal and seal assembly for sealing the annular space (14) between casing hanger bodies. An elastomeric seal ring (22) is interposed between metallic seal rings (20,24) having lips (36,38,40,42). The elastomeric ring is thicker (48) than the metal rings. The lips are of specific configuration, and the...     

A marine riser coupling assembly comprised of a pair of flanged couplings (14, 16). A pin insert (36) is retained (44, 54) within tubular portions (22, 24) of the couplings. The insert has multiple outside diameters (50, 50), and seals (66, 74) on each.

A small-diameter tubing connector and sealing apparatus for anchoring a tubing end in fluidtight engagement in high pressure service (up to 60,000 psi), said apparatus having four separate sealing areas.

A piping suspender with a metal-to-metal seal includes a piping hanger with an annular extension received in a counterbore of a well head and confined by a head adapter. The extension includes upwardly and downwardly facing, generally horizontally disposed shoulders. The upwardly facing shoulder abuts...     

A tube coupling having a male body, a female body for receiving at least a portion of the male body and at least one peripheral member made from a relatively compressible plastic material molded into a groove within either the relatively rigid male or female body. The peripheral member is disposed to...     

A tube coupling with only a body and a threaded member is disclosed, the threaded member usually being a nut to overlie an outer sleeve and an inner sleeve unitary with the body. These two sleeves define therebetween an annular groove to receive the end of the tube. The method of tightening the nut onto...     

A nipple for use in a Christmas tree bypass tool has an outer, molded rubber sleeve thereon and an inner steel insert, a portion of which forms a seal against a skirt on the rubber sleeve. The seal between the insert and the skirt prevents high pressure in the tool from reaching and acting on the bond...     

This invention relates to a tight connection device comprising a flexible metal joint. The joint, located in two trapezoidal grooves formed in two flanges, has in the rest condition an oval section, whereof one of the axes of symmetry is located in the plane of symmetry of the joints. The joint is in...     

A pressure-assisted dynamic seal mechanism for sealing two relatively movable members within a tubing string in a well includes a primary seal member having a first cross-sectional area positioned for sealing engagement between the two relatively movable members. The primary seal is pressure-assisted...     

A multi-plane swivel connector for use in attaching a pair of fluid conveying members together, the connector including a pair of swivel portions, that connect together at proximate ends, one end being insertable within the other, a double sealed connection provided at the junction of the connection...     

An arrangement for rapid and simple push-in connection of one end of a hose, pipe or similar element. The outer surface of the end is made of a soft material into which at least one retaining device appertaining to the arrangement can be forced to retain the end inside the arrangement. The arrangement...     

A pipe connector comprises a tubular pin member having an outer generally frusto-conical peripheral surface provided with annular projections, and a tubular box member having an inner peripheral surface corresponding to the peripheral surface of the pin member, which overlies the peripheral surface of...     

A tubular joint or connector of box and pin members is disclosed having two-step tapered threads. Two metal-to-metal seals of complementary engaging sealing surfaces are provided, one adjacent the end of the pin member, the other axially disposed between the two steps. Reverse angle torque shoulders...     

A quick-disconnect coupling for a pair of telescopic slidable tubular members has an annular garter spring trapped in a spring housing carried by one of the tubular members. The garter spring is adapted to be lodged between a right-angularly disposed flange on the spring housing and an upwardly-inclined...     

The disclosure relates to tube couplings in which a hollow body (10) has an opening (11) to receive a tube (15) and a collet (32) having resilient arms encircling the tube in the body to grip the tube. An annular cam (22) is mounted in the body and has a tapered internal cam surface (31) engaged by the...     

A conduit fitting of the quick connect push-in type wherein a tubular member having a radial shoulder is inserted into an annular body sealingly receiving the tube. A tube retainer employs a plurality of resilient fingers to maintain the tube within the body, while other resilient fingers position and...     

Male and female tubing or pipe ends have tapered thread with a sealing profile and a shoulder seal. A tapered end on the male tube cooperates with a tapered plastic compression seal at an internal shoulder in the female end. A modification has a tapered seat seal with complementary tapers at the end...     

A sealing assembly for sealing between a wellhead housing and a casing suspended in the housing including a base ring with an upper surface with inner and outer shoulders and an annular recess between the shoulders, a first energizing ring with a shoulder facing the base ring inner shoulder, a projection...     

A quick connect tube coupling assembly includes a tube end assembly axially insertable into a coupling body assembly, the latter including a body member provided with a stepped bore therein to receive an elastomeric oil seal, a radially flanged retainer seat, a split ring retainer and a hollow tube nut...     

The disclosure relates to a tap or valve body (10) having a bore (11) to receive a tube which is locked in the bore by means of a collet form tube coupling (21) and is sealed to the bore by O-ring seals 17, 18. The collet is encircled by a plastics insert sleeve (22) located in a counter-bore (19) at...     

A fluid swivel is described, which is especially useful for carrying hydrocarbons at high pressures between stationary and rotating walls of a swivel. The swivel forms a fluid-carrying annular chamber and a pair of gap-like passages lying between the walls and extending from opposite sides of the chamber...     

The disclosure relates to a tube coupling having a hollow tubular body having collet form couplings at either end thereof to receive and lock tubes in the body at either end. The body has an internal annular wall and an inner lines which extends over the wall shoulder and along the body to either side...     

The connection consists of two tubular pieces (1 and 2) clamped end to end against each other by means of a clamp collar the jaws of which (8 and 9) engage with conical slopes (5 and 6) of the connection pieces. Sealing is obtained by the close metal to metal contact of a support surface (17) with its...     

A coupling apparatus and method is disclosed for coupling a first and a second hose to enable the flow of fluid therethrough upon the application of fluid pressure comprising a first coupling member having a first internal bore connected to the first hose. A second coupling member having a second internal...     

A threaded pipe connection is disclosed having tapered sealing surfaces between the ends of the threads on the box and pin that engage and a resilient seal member located in a groove about midway between the ends of one of the surfaces to form a seal with the other surface when the joint is made up with...     

A connector, for example for connecting pipe sections, comprises a female member having threaded internal circumferential surfaces at each end, for engagement with a pair of male members each of which is provided with a threaded external circumferential surface. Each male member is provided with an annular...     

This is a novel swivel joint for connecting two fluid conveying conduits. It includes an inner cylinder connected to one conduit and an outer cylinder connected to the other conduit. There is a double seal with a pressure chamber therebetween the two cylinders at one end thereof and a second double seal...     

A swivel joint for pipes includes a split collet carried by a male portion of the coupling, and which provides an abutment for a threaded annular nut carried by a female member of the coupling, the nut being lockable in its adjusted position, the male member being rotatable within the female member to...     

A connection for well tubular goods including a male member, a female member, each having a double set of steep tapered hook threads, two internal pressure seals including a compressible primary metal-to-metal seal and a supplementary seal made up of a resilient corrosion resistant material and additionally,...     

A stab-type coupling apparatus adapted to receive an associated pipe end in a body thereof and prevent its withdrawal therefrom. The coupling apparatus includes an elongated hollow stiffener received in a coupling body recess and providing internal support for the associated pipe end. A retaining ring...     

A section of metal pipe has one end connected to a main line pipe. A hollow cylindrical plastic piston having a plurality of O-rings thereabout is slidingly and sealingly received within the open end of the metal section. A plastic carrier pipe is fixedly received within the outwardly facing end of the...     

A stripping gland is specially designed to act on uneven surfaced leads or the like making up a bundle that extends down into a well. It includes plural interior annular grooves which accommodate flexible seals. It also has an upper cylindrical chamber that has a highly elastic stationary seal which...     

A seal assembly for a shaft comprises one or more annular sealing elements having an initial internal diameter larger than the diameter of the shaft. The elements are deformed by a pair of annular backup rings disposed on opposite sides thereof. The backup rings have opposed axially extending undulations...     

An improved pressure type connection on stepped-thread Hydril-type tubing and casing tool joints is disclosed, wherein a secondary sealing means is included between the stepped threaded areas of the Hydril-type connector. The secondary sealing means includes an annular ring of relatively rigid, internally...     

A locking assembly for securing the connection between a push-on fitting having a flared end fitted into a cage and surrounded by a garter-type coiled spring housed within the cage on a pipe having a plurality of O-rings sealing the connection between the push-on fitting and the pipe. The assembly comprises...     

A pipe coupling for a stainless steel well casing includes a square threaded male member which is received within a square threaded female member so that the coupling is initially loose. O-ring seals are provided to prevent the fluid being pumped from corroding threaded portions of the male and female...     

An improved annular seal between tubular members in a subsea wellhead having an annular seal member with a U shape in section with the opening facing upwardly and two interengaged annular wedges for energizing the sealing surfaces of the inner and outer portions of the seal member at different levels....     

A releasable quick-connect coupling comprises tubular nipple and socket parts. The nipple is formed by a metal tube and a sleeve on the outer periphery of the tube, the sleeve being retained by beads formed on the tube. A locking ring is mounted in an annular groove formed in the sleeve. The socket includes...     

A zero-leak cryogenic coupling includes a polymeric seal clamped to a male bayonet member with two pairs of tightening rings. The tightening rings threadably engage each other in respective pairs around tapered ends of the inflatable seal member so that a wedging action tightens the seal member about...     

A readily attachable and detachable coupling for fluid conduits including a receptacle member having a passageway therethrough and having a notch formed in the external surface communicating with the passageway, the notch having a forward wall inclined at an acute angle to the member longitudinal axis...     

An improved coupling for connecting a pipe joint and a metal pipe which has a relatively small diameter not exceeding about 30 mm and a wall thickness not exceeding about 2 mm is offered. The coupling is often used to form a pipeline for supplying oil, air, etc. to an automobile, machine or apparatus,...     

An improved structure for a metal pipe fittings. Each passage hole of the body of a pipe fitting, such as an elbow, a tee, a cross etc., is provided with a female thread which a male-threaded ring screws in with tightly to press a metal ring and several gaskets abutting against one another around a pipe...     

A packoff assembly for sealing an annulus between an inner tubular member and an outer tubular member including a sealing means rotatably connected to a packing nut. The sealing means includes an upper actuation ring rotatably retained on the packing nut. A sealing member having a ring-like metal body...     

An aseptic pipe joint for food processing pipe fittings of the type including a pair of frustoconical ferrules having radially extending surfaces, a "C" shaped metallic ring positioned between the surfaces in abutting relation therewith, a resilient O-ring filling the "C" shaped ring to form an aseptic...     

A seal assembly for providing a primary metal-to-metal seal between the outer wall of a tubular member and the inner wall of a surrounding receiving bore slidingly receiving the tubular member. The sealing assembly includes a metal seal ring member having the general configuration of a toroid which has...     

A coupling for a fluid conduit under pressure has a plug carrying O-rings and inserted in a socket. A bead on the plug forms a stop for location of the O-rings. A nut rotatably mounted on the plug and held adjacent the bead has an elongated threaded annulus engaging threads on the socket so that nut...     

A coupling between parts subject to differential expansion and contraction comprising first and second sealing abutments and an intervening constraint on relative movement whereby differential movements provide a self-compensating tightening and loosening of the sealing abutments. The coupling is especially...     

A casing seal for use with a source of high pressure fluids with apparatus for preventing shredding of the seal with variations in fluid pressure. A T-shaped annular metal ring provides a multiplication of fluid pressure so pressure exerted on an elastomeric sealing ring is greater than the fluid pressure....     

A pipe joint for connecting two pipes to each other has a joint member to which one of the pipes is fixed and provided with a bore formed therein, a socket member fixed to the outer peripheral surface of the joint member and provided at its one end with a flange having an opening and also with an annular...     

A collar for electrically insulating between upper and lower tubing sections in which load bearing insulating materials in the collar are isolated from fluids both interior and exterior the collar.

A fluid connector assembly is disclosed. The fluid connector assembly includes a first member having a body and a neck extending from the body. At least two peripheral grooves are formed in the neck. At least two resilient polymeric members are adapted to be received by the neck in the two peripheral...     

A quick connect and disconnect coupling includes a connetor for housing a fluid conduit. The conduit includes a flexible tube terminating in an upset bead. One or more adjoining O-ring seals encircle the tube adjacent the upset bead. The connector includes a plug for receiving the tube. The plug terminates...     

A swivelable quick connect assembly for use with tubular conduits includes a housing having an axial bore for receiving one end of the conduit, and a first retainer detachably secured to the housing and is cooperable with an annular projection on the conduit for securing the conduit in its operative...     

A deformable sealing member is disposed between two surfaces such that a space is provided to at least one side of such sealing member. A smaller space may be provided to a second side of the sealing member. The sealing member is conformed to contact both surfaces. A pressure coming from the direction...     

A clamping connection unit for joining two hollow cylindrical pipes together is described. The unit consists of two abutting identically constructed coupling halves (1,2), an elastic O-ring (16) placed between them and a clamping connection (15) pressing the two coupling halves together. The clamping...