Abstract: A plier sheath having an open end pocket for receiving and supporting a pair of pliers. The pocket is formed by folding over and by interconnecting the lower side portions of a flexible sheath panel. The plier sheath can be permanently or removably attached to a knife sheath in a superimposing fashion by fastener elements. The plier sheath may also be removably attached to a person's clothing item such as a belt with a loop disposed at the upper back portion of a plier sheath, through which the belt may be placed.

Abstract: 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. The support member is connected to the wellhead for itself suspending casing, for supporting at least one other casing hanger and casing, and for containing the working pressure. Breech block teeth are provided on the wellhead and support member to permit the support member to be stabbed into the wellhead and rotated less than 360.degree. for completing the connection therebetween. The teeth include groupings of spaced-apart no-lead teeth having slots therebetween. The slots provide a flow way for passing well fluids. The support member further includes an upper annular flange for arresting its downward movement within the wellhead. This flange includes flutes aligned with the slots for passing well fluids.

Abstract: An educational apparatus is disclosed including a base, a question/answer disc, a cover disc and a pointer all disposed on a post screw stacked from bottom to top in the order listed. The base displays a circle of numbered question/answer blocks which may be seen around the question/answer disc. The question/answer disc displays radial question/answer segments corresponding to the numbers in the question/answer blocks on the base. The question/answer segments are divided radially into a single question subsegment and a single answer subsegment. The cover disc has a window through which to view a single question displayed radially within the question subsegment. After the answer to the question has been attempted, the window in the cover disc is moved clockwise to reveal the correct answer in the answer subsegment. This answer is compared with the attempted answer. The question/answer discs are exchangeable. The apparatus may be used by a single person or may be used to play a competitive multiplayer game.

Abstract: A swiveling device for tensioning a pre-stress bar having a threaded end projecting from an end face of the element to be pre-stressed comprises a jack having a movable part attached to the bar and a fixed part bearing against the element. A first bearing plate is mounted on the end face of the element around the bar and includes an annular spherical cup surface. A swivel joint nut is threaded on the end of the bar and has a spherical ball part seated in the cup surface of the first bearing plate forming a first swivel joint. A second bearing plate is slidably disposed on a face of the first bearing plate and includes a second annular spherical cup surface. The end of the fixed part of the jack proximate the element includes a spherical surface seated in the second annular spherical cup surface forming a second swivel joint.

Abstract: According to the invention, fluid is adapted to flow through a piston and cylinder disposed in the housing of a meter prover. The cylinder is telescopingly received within the piston. The fluid is permitted to flow into the piston and cylinder through an upstream inlet and leave through exit ports in the cylinder. A poppet valve is provided for closing the exit ports whereupon the piston becomes a fluid barrier and is adapted to move in synchrony with the fluid flow from the upstream fluid inlet. A single detector is provided which is activated at the start of the proving run and at the end of the proving run. A rack is mounted on the piston for turning a gear. The gear rotates a disc having a plurality of markings indicating the incremental displacement of the piston. A photopulser transmits a pulse to a counter for each marking detected upon rotation of the disc. Sufficient piston displacement is permitted to generate a minimum of 10,000 pulses.

Abstract: A temporary hub cover for the hubs of flow lines, hydraulic lines, and electrical conduits and the mating hubs of the underwater production unit includes a body enclosing the hub, plungers within the body for releasably engaging into detents on the hub to hold the cover on the hub, and a trigger mechanism operable from a remote location to release the engagement between the cover and hub whereby the cover can be removed from the hub. A connector tool is lowered through the water and supports means for operating the trigger mechanism upon downward movement of the connector tool.

Abstract: A flangeless, disc-like seal plate is disclosed for insertion between opposing flowline hubs for sealingly connecting, blocking or rerouting fluid flow between various fluid carrying lines within said flowline hubs. For connecting flow lines, straight throughbores within the seal plate are provided with V-seals in channels on said seal plate around the throughbores, as well as O-ring seals around said V-seals and another O-ring near the periphery of the disc itself. No seals or seal grooves are necessary on the hub faces. For connecting hydraulic control lines, the seal plate is equipped with transverse channels interconnecting various throughbores but may also be provided with blind ports for totally blocking off certain control lines at the plate. Within said throughbores, fluid diverter plugs are inserted which are either equipped with protruding caps for opening up corresponding check valves housed within hub lines or flush plugs such that said check valves remain closed after clamp-up.

Abstract: Sand placement apparatus includes a well screen assembly and a sand placement tool. The sand placement tool comprises a tubing extension or stinger and a slurry conduit which includes a barrel concentrically disposed around the stinger and a tail pipe extending down therefrom with a valve controlled seal sub at the lower end of the tail pipe. The well screen assembly comprises a production liner including a valve controlled seal socket, a lower or main well screen, a short length of pipe, an upper or tell-tale well screen, and the tubular mandrel of a hook wall packer. By means of this packer the liner is suspended within a well casing. The liner is positioned with its screens inside a perforated section of a well casing. The tool is positioned inside the liner by means of a sleeve anchored to the packer mandrel and adjustably positioned relative to the barrel to deliver sand-water slurry to the liner-casing annulus and build up the sand from the top of the annulus and then downwardly.

Abstract: A one-piece metal wear sleeve, circumferentially homogeneous, is secured by epoxy to the outer periphery of a drill pipe. The inner diameter of the sleeve is less than the outer diameter of tool joints at the end of the drill pipe. The sleeve is centrifugally cast of two materials, including a tough, strong material such as an iron alloy at its inner portion and a hard non-abrasive wear resistant material such as alloy steel at its outer portion to resist wear on the sleeve, e.g. when it is run in open hole or in a cased hole. The outer portion is homogeneous and has a smooth outer periphery so as to reduce wear on the casing when the pipe is run in cased hole.

Abstract: A quick attachable and detachable multiple connection between fluid conduits provided in a stepped cylindrical socket and remote actuated valve controlled fluid conduits in a stepped cylindrical plug hydraulically locked therein, the connection between the conduits comprising seal tube means extendable from within each plug conduit to abut against the inner periphery of the socket around the outside of the adjacent socket conduit and form a face seal therearound.

Abstract: Apparatus for releasing the means for gripping a pre-stress cable, to allow the cable to be detensioned. Each strand is usually maintained in the tensioned state by a cone truncated group of gripping means enveloping this strand. According to the invention each of the gripping means of a group surrounding a strand comprises towards the outside an extension which, in the active state of the gripping means, is spaced apart from this strand, all the extensions thus determining a volume of revolution terminating towards the outside by a hooking flange, while the extractor is formed by resilient parts distributed along the generatrices of a cylinder and comprises inwardly turned hooking flanges, the circumference determined by all the inner edges of the projections in the state of rest being of smaller diameter than that of the volume formed by the outer surface of the extensions of the gripping means beyond their hooking flange, when these gripping means are in the active state.

Abstract: A tubing head, tubing head adapter and tubing hanger are sealed against annulus fluid or downhole pressure by an upper and a lower, pressure-energizing sealing assembly. The sealing assemblies are bi-directional, pressure-energizing and operate under working pressures of up to 30,000 psi. Each assembly consists of a metal seal ring made of highly elastic and ductile 316 stainless steel with a yield strength of approximately 30,000 psi, having a frustoconical shape, with the upper and lower tips of the cone enclosing an angle of approximately 28.degree. in the prestressed state. In the axial direction, the seal ring engages a support ring on one end and a tubing hanger shoulder at the other end, both of which form inclines of 30.degree. with the vertical (radial) plane. The support ring and the tubing hanger shoulders are made of materials having yield strengths of 50,000 psi and 75,000 psi, respectively.

Abstract: The protective garment of the present invention primarily for use as protective athletic equipment includes protective gear for the shoulders, ribs, biceps, forearms, thighs, knees and shins. The protective garment is generally composed of variable pressure pads, air cushions, and/or shields. The variable pressure pad includes two superimposed plies of a light-weight, non-elastic fluid-impervious fabric material having the adjacent surfaces of the material sealed around the periphery to form a pressure tight inflatable garment which does not distend and other adjacent surfaces sealed at regions internally of the periphery to define a plurality of fluid chambers and fluid passageways. The internal fluid chambers are fluidly communicable with adjacent fluid chambers by means of the fluid passageways. The material crinkles and folds over at preselected regions to constrict fluid communication between the fluid chambers as an external force is applied to the variable pressure pads.

Abstract: Combined metal-to-metal/compliant material stem sealing means for high pressure, balanced, rising stem gate valve includes at least one seal set at each of the actuator and balance stems. Each seal set comprises a pair of frustoconical metal ring gaskets between which are disposed two make-up rings of compliant, tough material of high lubricity, e.g. tetrafluoroethylene polymer. One make-up ring is adjacent to one gasket, and the other make-up ring is adjacent to the other gasket. A core ring of material that expands substantially less volumetrically upon heating than the make-up rings, e.g. compacted graphite, is disposed between the make-up rings. Around the inner periphery of the core ring adjacent the respective actuator or balance stem is disposed a bearing ring of material like that used for the make-up rings, e.g. tetrafluoroethylene polymer.

Abstract: A sand or gravel placement or packing apparatus for positioning particulates outside well screen includes pipe to conduct slurry to below the screen and receive clear liquid returning from outside the screen as the particulates accumulate upwardly, the apparatus including valving to provide for initial injection of clear fluid, for circulation slurry, for squeezing the slurry, for flusing the tubing and parts of the tool by reverse circulation, and for closing the slurry injection part below the screen and the lower end of the slurry pipe when the latter is withdrawn.

Abstract: The spin blast tool includes a housing having a tubular member rotatably disposed on bearings in the housing. A nozzle is mounted on one end of the tubular member and the other end of the tubular member is connected to a pressurized air and sand source. That end of the tubular member adjacent the presurized air and sand source includes a counterbore for receiving a tungsten carbide throat insert. The throat insert has an inner diameter which is smaller than the inner diameter of the tubular member. The insert has an annular radial flange juxtaposed with the end of the pressurized air and sand source. A polyurethane seal washer circumscribes the throat insert and is housed between the radial flange and the end of the tubular member. A wafer spring section is compressed between the outboard surface of the radial flange and the end of the pressurized air and sand conduit. The wafer spring section provides constant pressure on the throat insert as the throat insert wears.

Abstract: A one-piece metal wear sleeve, circumferentially homogeneous, is secured by epoxy to the outer periphery of a drill pipe. The inner diameter of the sleeve is less than the outer diameter of tool joints at the end of the drill pipe. The sleeve is centrifugally cast of two materials, including a tough, strong material such as an iron alloy at its inner portion and a hard non-abrasive wear resistant material such as alloy steel at its outer portion to resist wear on the sleeve, e.g. when it is run in open hole or in a cased hole. The outer portion is homogenous and has a smooth outer periphery so as to reduce wear on the casing when the pipe is run in cased hole.

Abstract: A drill string splined resilient tubular telescopic joint for balanced load deep weel drilling comprises a double acting damper having a very low spring rate upon both extension and contraction from the zero deflection condition. Stacks of spring rings are employed for the spring means, the rings being either shaped elastomer-metal sandwiches or, preferably, roller Belleville springs. The spline and spring means are disposed in an annular chamber formed by mandrel and barrel members constituting the telescopic joint. The chamber containing the spring means, and also containing the spline means, is filled with lubricant, the chamber being sealed with a pressure seal at its lower end and an inverted floating seal at its upper end.A prototype includes of this a bellows seal instead of the floating seal at the upper end of the tool, and a bellows in the side of the lubricant chamber provides volume compensation.

Abstract: A wear sleeve having tapered ends is secured to a drill pipe by placing tapered split seal rings adjacent the ends of the sleeve to seal the annulus between the sleeve and pipe, introducing exothermically polymerically setting liquid epoxy plastics material into the annulus via a long elastomeric riser tube pushed into an inlet port in one seal ring until the epoxy rises well into another long elastomeric riser tube pushed into an exit port in the other seal ring, meanwhile heating the interior of the pipe within the sleeve to e.g. 150.degree. F. by blowing hot air through the pipe, and when the plastics material has set, rotating the riser tubes about their axes to break off the sprues, and removing the riser tubes and seal rings.

Abstract: In accordance with the present invention, the drilling head includes a body or spool having a flow bore and a removable side outlet. Upon removal of the side outlet, the drilling head will pass through most rotary tables. The drilling head further includes a closure member for closing the annulus between that portion of the drilling head above the side outlet and a drive tube, such as a kelly, extending through the drilling head flow bore. The closure member includes a nonrotating support tube and a rotating seal tube adapted to form a nonrotating seal with the drive tube. The seal tube is rotatably supported by bearings within the support tube. The closure member is small enough to pass through even rotary tables that are too small to pass the drilling head.A segmented clamp secures the closure member to the drilling head body around one end of the flow bore. The clamp includes at least two segments, for fast actuation, having one end connected to a variable length linkage.