Abstract: A discharge arm assembly for a truck or trailer-mounted pumping unit comprises a jumper line which is connected to the outlet of the pumping unit, a base unit which is connected to the outlet of the jumper line, and an articulated arm which is connected to the outlet of the base unit. The base unit includes a base conduit which is rigidly secured to the truck or trailer and a swivel arm which is rotatable about a generally vertical axis. The articulated arm comprises a first generally straight pipe which is connected to the swivel arm by a generally 90° elbow. A brace member comprises a first end which is connected to the swivel arm and a second end which is connected to the first pipe to thereby support the first pipe for movement in a generally horizontal plane.

Abstract: A threaded union nut is disclosed which includes a body, a threaded opening formed in the body and a web including a plurality of impact openings that are radially offset from a centerline of the threaded opening, wherein the impact openings are adapted to be engaged by a device so as to rotate the threaded union nut. A sliding hammer is also disclosed which includes a guide rod, a structural member coupled to the guide rod and a hammer having an internal bore adapted to receive the guide rod therein. The sliding hammer further includes a flexible cable and a swing handle, wherein the cable is coupled to the hammer and to the swing handle. The hammer is adapted to strike the structural member.

Abstract: The invention is directed to a coiled tubing swivel for rotatably connecting a first conduit to a second conduit. The swivel comprises a swivel body having a cylindrical receptacle and a flowpath that communicates between the receptacle and the first conduit, a tubular mandrel having a first end that is received within the receptacle and a second end which communicates with the second conduit, and a bearing assembly positioned between the receptacle and the mandrel. The bearing assembly includes a central axis, a cylindrical outer sleeve having an inner surface and a number of annular inner grooves which are formed on the inner surface coaxially with the central axis, and a cylindrical inner sleeve having an outer surface and a number of annular outer grooves which are formed on the outer surface coaxially with the central axis.

Abstract: The invention is directed to a plug valve comprising a body which includes an inlet port, an outlet port and a cavity that is connected between the inlet and outlet ports; first and second seal segments which are mounted in the cavity and which each comprise a through bore that is coaxial with the inlet and outlet ports; the through bores and the inlet and outlet ports defining a flow passage through the body; a plug member which is rotatably positioned between the first and second seal segments and which includes a hole that extends transversely therethrough; the plug member being rotatable between an open position in which the hole is aligned with the flow passage and a closed position in which the hole is offset from the flow passage; and at least a first booster spring which is positioned between the first seal segment and the body to bias the first seal segment against the plug member.

Abstract: The invention is directed to a coiled tubing swivel for rotatably connecting a first conduit to a second conduit. The swivel comprises a swivel body having a cylindrical receptacle and a flowpath that communicates between the receptacle and the first conduit, a tubular mandrel having a first end that is received within the receptacle and a second end which communicates with the second conduit, and a bearing assembly positioned between the receptacle and the mandrel. The bearing assembly includes a central axis, a cylindrical outer sleeve having an inner surface and a number of annular inner grooves which are formed on the inner surface coaxially with the central axis, and a cylindrical inner sleeve having an outer surface and a number of annular outer grooves which are formed on the outer surface coaxially with the central axis.

Abstract: The invention is directed to a plug valve comprising a body which includes an inlet port, an outlet port and a cavity that is connected between the inlet and outlet ports; first and second seal segments which are mounted in the cavity and which each comprise a through bore that is coaxial with the inlet and outlet ports; the through bores and the inlet and outlet ports defining a flow passage through the body; a plug member which is rotatably positioned between the first and second seal segments and which includes a hole that extends transversely therethrough; the plug member being rotatable between an open position in which the hole is aligned with the flow passage and a closed position in which the hole is offset from the flow passage; and at least a first booster spring which is positioned between the first seal segment and the body to bias the first seal segment against the plug member.

Abstract: The present invention is directed to a swivel joint for fluid conduits which comprises a central axis; a tubular male member having an outer annular surface, a first end and at least first and second outer annular grooves formed on the outer surface coaxial with the central axis; a tubular female member having an inner annular recess, an annular shoulder formed at an inner end of the recess and at least first and second inner annular grooves formed on the recess coaxial with the central axis; wherein the outer surface of the male member is adapted to be received in the recess of the female member such that the first end is disposed proximate the shoulder and each outer groove is aligned with a corresponding inner groove to thereby define at least first and second annular races; a plurality of balls disposed in each race to secure said male and female members together and to facilitate relative rotation of the male and female members about the central axis; wherein the radius of each race as measured from the

Abstract: A fluid-carrying swivel joint has a stepped bearing race arrangement on interconnecting hubs having an improved bore seal capability. The stepped arrangement allows more ball bearings per adjacent race which allows equal distribution of hydrostatic end loading to each bearing race, thereby enabling maximum total end loading while minimizing load concentration on a particular bearing race section due to increased total ball and race contact area. A straight bore type seal is used to reduce surface area subject to axial pressure and to minimize rotational friction.

Abstract: A plug or gate valve including two seats shaped as cylindrical segments and having a first continuous seal surrounding the flow passage and at least one satellite seal outside the first seal to reduce the area upon which pressure acts to force the segment toward the plug or gate.

Abstract: A bore seal assembly for sealing between first and second adjoining tubular members which comprises a cylindrical seal sleeve having a bore and two radially outwardly extending sealing lips for engaging a seal pocket formed in the adjoining ends of the first and second tubular members, a cylindrical wear sleeve mounted within the bore for supporting the seal sleeve within the seal pocket, and an elongated erosion sleeve extending longitudinally from the wear sleeve into at least the first tubular member, whereby the erosion sleeve protects the first tubular member against erosion.

Abstract: In combination with a dual elbow swivel joint having a female elbow member rotationally coupled to a male elbow member, the invention comprises an orientation device having an angle marker located on one elbow member and an indicator mark located on the other elbow member. The angle marker contains a number of angle markings located at predetermined angles measured from the central axis of the elbow member. The indicator mark is placed on the other elbow member in a location such that, when aligned with an angle marking, the elbow members are in a predetermined angular orientation relative to each other. The angle markings on the angle marker each have a length which is related to the amount of wear that has been found to occur in the dual elbow swivel joint when the female and male members are oriented at that particular angle. Thus, the orientation device enables an operator to orient the female and male elbow members at an angle at which the dual elbow swivel joint will experience the least amount of wear.

Abstract: A valve comprising a body having an interior cavity, an inlet port and an outlet port; an upstream seat and a downstream seat positioned within the cavity, each seat including a bore in alignment with the inlet and outlet ports to define a flow passage through the valve body; a closure member movably positioned between the seats to either open or close the flow passage; a seat-to-closure member seal defined between each seat and the closure member, the seat-to-closure member seal defining a first area between the seat-to-closure member seal and the bore of the upstream seat; wherein the upstream seat includes a sealing member between the seat and the valve body which is positioned asymmetrically around the bore; and wherein the sealing member defines a second area between the sealing member and the bore which is larger than the first area.

Abstract: A bore seal assembly for sealing between adjoining tubular members having a seal pocket formed in the adjacent ends thereof which comprises a cylindrical seal sleeve having a bore and two radially outwardly extending sealing lips for engaging the seal pocket, a cylindrical finger spring mounted within the bore of the seal sleeve and having an annular central section and a plurality of fingers extending axially outwardly therefrom for urging the sealing lips against the seal pocket, and a cylindrical wear sleeve having a curvilinear outer diameter for supporting the fingers and transferring the contact point between the fingers and the wear sleeve toward the ends of the fingers to thereby increase the stiffness of the fingers and maintain a spring force sufficient to overcome the force caused by contraction of the seal sleeve in low temperatures.

Abstract: A pipe swivel joint with male and female hubs and an improved bore seal assembly having an anti-extrusion ring that axially energizes the swivel joint hubs toward their operational position as the joint is assembled.

Abstract: A well casing hanger with a wide temperature range seal element that is energized by axial compression with a pre-determined initial portion of the casing hang load, the remaining portion of that hang load then being transferred to the wellhead or other surrounding well element without imposition on the seal element.

Abstract: A plastic bore seal assembly, for use in a static or dynamic mode, comprising a sleeve-type seal element with an annular sealing lip at each end thereof, an anti-extrusion ring surrounding the seal element intermediate the sealing lips, one or more sleeve-like finger springs within the seal element, and optionally a wear sleeve within the seal element bore.

Abstract: A pipe connector load element interconnects a pipe element and a connector retention member. The load element is mounted in an annular groove on the outer circumference of the pipe element and in a groove adjacent to an internal bore in the retention member to secure the retention member to the pipe element. The load element includes a plurality of elongated components each having a slot extending lengthwise, and a flexible ribbon for threading through the slots. A pair of retention members are interconnected to connect a pair of pipe elements in an end-to-end arrangement.

Abstract: A pipe connector device for interconnecting first and second pipe elements using a retention member removably secured to the first pipe element by load elements. The retention member is secured to the second pipe element by pipe threads or a second retention member can be secured to the second pipe element by load elements and the first and second retention members threaded together. A seal is extended along a portion of the length of the first and second pipe elements adjacent to an end portion of each of the pipe elements to prevent leakage. This provides a fluid-tight seal which is relatively independent of any pressure exerted between the first and second pipe elements by the retention member.

Abstract: A fluid packing comprising a stacked assembly of V-ring seal elements, special backup/energizing rings interspersed between the seal elements, and a spring-energized lip seal ring that is retained in functional position by an adapter ring having a generally tee-shaped cross-sectional configuration. As the assembly is installed in a stem packing chamber of a valve or choke, or in the packing chamber of a wellhead lockdown screw, with the T-adapter ring at one end of the assembly and a backup ring for the V-ring seal elements at the other end, the lip seal ring and the V-ring seal elements are radially compressed to establish an initial seal between the stem or screw and the chamber wall.

Abstract: A swivel joint comprises a tubular male member having at least first and second outer annular grooves formed on an outer surface, a tubular female member having at least first and second inner annular grooves formed on an inner recess, and a plurality of balls disposed in at least first and second annular races which are formed by the alignment of the first and second outer grooves with the first and second inner grooves when a first end of the male member is received within the recess of the female member. In addition, the radius of the first race is greater than the radius of an adjacent race closer to the first end of the male member, and the number of balls in the first race is just one more than the number of balls in the adjacent race closer to the first end.