Abstract:
A method is provided for securing a wellbore tool assembly to a wellbore tubular member, which includes a number of method steps. The wellbore tubular member is provided, and defines a surface with a substantially cylindrical shape having a selected tubular diameter. A wellbore tool assembly is likewise provided, and includes a plurality of ring-shaped components, with at least one ring-shaped component defining a cylindrical surface having a selected ring diameter which differs from the tubular diameter of the wellbore tubular member. A plurality of radial groove members and radial land members are formed on at least one of the cylindrical surface of the wellbore tubular member and the cylindrical surface of the at least one ring-shaped component of the wellbore tool assembly. The wellbore tubular member and the at least one ring-shaped component of the wellbore tool assembly are urged to differing thermal conditions to cause the tubular diameter and the ring diameter to become substantially equal. While maintaining the differing thermal conditions, the wellbore tubular member and the at least one ring-shaped component of the wellbore tool assembly are coupled together. Then, the wellbore tubular member and the at least one ring-shaped component of wellbore tool assembly are urged to substantially similar thermal conditions to cause a radial interference coupling therebetween. Preferably, the at least one ring-shaped component operates to retain other wellbore tool assembly components in selected positions relative to the wellbore tubular member.
Abstract:
A method of controlling the temperature in a tunnel open at both ends and along which objects are displaced by conveyor means, the tunnel including heating or cooling means disposed along its two side walls between which the conveyed objects pass. According to the invention, the temperature is sensed in a particular zone of the tunnel in which a predetermined temperature is desired, and in organizing transverse displacement of the heating or cooling means (104) is organized in a direction essentially perpendicular to the direction in which the objects (103) are conveyed by means of a servo-control system causing the heating or cooling means to be displaced automatically mutually towards each other or away from each other whenever the sensed temperature differs from the predetermined temperature, thereby having the effect of permanently ensuring a constant temperature environment for the objects concerned in the above-mentioned zone of the tunnel. The invention is particularly suitable for shrinking heat-shrink sleeves onto flasks for decorative and/or protective purposes, and it is also suitable for cooling down glass receptacles.
Abstract:
A water-condensing heat exchanger recovers heat from a hot flue gas, subjecting tubes of the heat exchanger to substantial thermal expansion and contraction, and corrosive constituents in the flue gas require that metal tube sheets be thoroughly insulated from the flue gas during operation in a water-condensing mode. The heat exchanger is constructed by heat-forming edge portions of holes in plastic sheets through holes in tube sheets, temporarily plugging the plastic-lined holes to limit diametrical reduction, and entering tubes through the plastic-lined holes sufficiently shortly after unplugging the holes that further diametrical reduction of the holes causes them to grip and fixedly locate the tubes relative to the tube sheets. The method of manufacture also concerns providing a fluroplastic coating, e.g., polytetrafluoroethylene, on the interior elements of the heat exchanger to inhibit corrosion thereof; such coatings are hydrophobic thus allowing falling condensate to be washed away easily.
Abstract:
A method for the in situ repair of heat exchanger tubes in major heat exchanger equipment is disclosed in which supercooled sleeves are inserted into cracked heat exchanger tubes and are expansion-fitted firmly against the inner walls of the cracked tubes. In order to prevent premature expansion of the relatively long, small diameter sleeves during insertion, the tubes may be filled with a heat sink material which is removed following insertion. The insertion is also preferably accomplished very rapidly by means of a power-actuated ram which maintains the sleeve at its low temperature until the very last moment before insertion. Various guide means and plug means for the sleeve are described. The technology is also indicated as being applicable to the temporary sealing of defective tubes by using a removable plug in the form of a closed-end sleeve into whose interior a cryogenic agent can be selectively introduced during insertion and removal.
Abstract:
A turbine rotor disassembly, handling and reassembly apparatus employs a feedback-controlled electric heating oven to rapidly heat a turbine wheel while the rotor shaft is in the horizontal position. An adapter interfaces the wheel to a handling spool whose outboard end is adjusted to slide on the rotor shaft and to provide a fulcrum for supporting the wheel. A handling trolley includes a soft hydraulic system for supporting the weight of the wheel to avoid damaging the precision machined surfaces of the shrink-fit area while the wheel is being withdrawn. The handling apparatus also provides means for upending, or rotating, the removed wheel through 90 degrees to place its axis vertical for facilitating handling. A sensor system senses a radial motion of the wheel to detect clearance and to establish an appropriate fluid pressure to just balance the weight of the wheel and attached parts. The handling system includes means for rotating the wheel slightly during reassembly to align keyways or the like. A technique is included for equalizing shaft heating during reassembly of a turbine rotor by cyclically elevating and lowering the wheel, by orbiting the wheel about the shaft or by holding the wheel in the center of its clearance about the shaft until a shrink fit is established.
Abstract:
A lightweight motorcycle wheel and method of making the same comprising a die cast alumnium alloy hub and spoke unit around which an extruded aluminum alloy drop center rim is shrinkfitted and bonded by high strength thermosetting resin adhesive between coaxial cylindrical walls of said rim and unit.
Abstract:
A track pin has the ends thereof mounted in bores defined by respective track links. The ends of the track pin are heated above the critical temperature of the steel making up the track pin, and then quenched, whereby the ends of the track pin have increased in volume to be retained in the bores of the respective track links.
Abstract:
A method of supporting a metal tank having a circular horizontal section which comprises providing the tank with a horizontal ring-like portion having a substantially upright surface, forming a metal substantially upright skirt having a top portion with an internal surface which matches the tank ring-like surface and which has an internal diameter at ambient temperature at matching locations slightly less than the diameter of the tank ring-like surface at ambient temperature, heating the skirt top portion, or cooling the tank ring-like surface, or both until the internal diameter of the skirt top portion is larger than the diameter of the tank ring-like surface, positioning the skirt top portion around the tank ring-like surface, bringing the skirt top portion or the tank ring-like surface or both to ambient temperature to thereby shrink-fit them together, and joining the skirt top portion to the tank by welds, bolts or rivets.A metal tank having a circular horizontal section, the tank having a horizontal ring-like portion having a substantially upright surface, and a metal substantially upright skirt having a top portion with an internal surface which matches the tank ring-like surface shrink-fitted around and in contact with the tank ring-like surface.
Abstract:
A knuckle assembly in which the upper knuckle, steering arm and brake rails are formed as a one piece casting and the spindle and lower knuckle are formed as in integral forging. The spindle is then shrink fitted into a spindle opening machined in the casting with the lower knuckle positioned correctly relative to the upper knuckle and then finished to receive a lower ball joint.
Abstract:
Method and apparatus for shrinking a metallic collar onto a shaft, with means provided for applying a coolant to the circumference of the collar while maintaining pressure thereon.