Abstract: A process and apparatus, wherein as hot gas from a coal gasifier discharges through a tubular outlet having therein a wall which is permeable throughout its length for the flow of hot gas centrally therethrough, a gas shield is formed along the inner surface of the tubular outlet by passing a coolant through the wall, which gas shield cools the wall and prevents sticky ash particles in the hot gas from hitting the wall. The gas shield also cools the hot gas so that the sticky ash particles lose their stickiness.

Abstract: A method of reducing the temperature of sponge iron to a safe level for storage and shipment including the steps of transferring freshly prepared sponge iron in particulate form to a separator vessel, such sponge iron being at dangerously high temperatures rendering it susceptible to oxidation; passing a cooling gas stream through the sponge iron in order to initially cool and fluidize the sponge iron and transfer smaller particles and fines away from the larger, more solid sponge iron particulate; conveying by vibration the remaining sponge iron towards a storage area and applying the cooling gas to the remaining sponge iron as it is conveyed towards storage in order to reduce the average temperature of the sponge iron to a safe level.

Abstract: A fluid introduction unit adapted to be mounted in a well production flow assembly, sometimes referred to as a christmas tree, for the introduction of highly corrosive fluids into high pressure wells without damaging the production tubing.

Abstract: A mounting assembly for a journal bearing that is adapted to be disposed between a rotating headshaft and a frame member, with the mounting assembly including a bearing cone, resilient compression rings, and outside seal retainer members disposed about the rotating headshaft with the resilient compression rings compressively positioned between the bearing cone and outside seal retainer members to frictionally secure the bearing cone along the rotating headshaft upon axial rotation of the outside seal retainer members with respect to the bearing cone.

Abstract: A new and improved apparatus and method for cementing casings in wells that is particularly advantageous for use in subsea wells. The cementing plug apparatus contains the cementing plugs which are released by a predetermined manipulation of the support string for the apparatus. Inadvertent or premature release of the cementing plug is prevented by a telescoping tubular stinger member which protects the cementing plugs from circulation flow.

Abstract: Soldering fluxes and methods of using same for soldering metals with solders which are molten below 400.degree. C. wherein the flux functions efficiently but with an absence or minimum of spattering of particulate solder or reaction products between the solder and flux. Soldering fluxes according to this invention can be utilized in any soldering application and by any method of soldering where it is desirable to eliminate or reduce spattering.A few examples of common soldering compositions in this category are tin, tin and antimony, tin and lead. One example of the use of such fluxes is in the soldering of tinplate can bodies whereby it is possible to minimize or substantially eliminate the contamination of the can body by the lead component of the solder when lead bearing solders are used.

Abstract: A damper assembly adapted to be affixed to an air-handling unit at an installation site including a plurality of adjacent damper assembly units adapted to be mounted with and for regulating air flow from the air-handling unit, the damper assembly unit having an interlocking structure for interlocking adjacent damper assembly units theretogether. Further, the damper assembly has a damper structure for simultaneously and independently controlling the relative mixing proportions of heated air and cooled air with ambient air for use with a multi-zone air-handling unit.

Abstract: A process for the recovery of hydrocarbons from oil field reservoirs, wherein dry pipeline quality natural gas, essentially entirely methane, is injected, stored and recycled in the wells of the reservoir to effect a significant recovery of the oil in the reservoir while storing and holding the gas for ultimate use only after the oil has been recovered from the reservoir, whereby the relatively scarce gas is utilized to its maximum extent and oil is produced which would be otherwise difficult or uneconomical to produce by prior known processes.

Abstract: Method and apparatus for determining the true cathode polarization potential or reference voltage for any corrosion protection system and which determination may be visually indicated, used as a feedback for automatic control of the corrosion protection system or both.