Abstract: A vibratable plastic refractory composition which is based upon calcined kaolin and a non-basic calcined refractory aggregate, in which the -325 mesh fraction of the batch is controlled to between about 30 and 45%.

Abstract: A jet pump has a nozzle assembly within a pump body to direct power fluid into a venturi assembly for mixing with well fluid to be pumped. The nozzle assembly has a nozzle shell removably mounted in the pump body and a nozzle tip mounted securely to the nozzle shell. The nozzle tip has one end portion mounted within an opening of the nozzle shell and is secured to the nozzle shell by a bonding material.

Abstract: A steering assembly for a radially steerable articulated railway car truck has a pair of steering arms that are operably joined to the truck axles and connected together by a linkage passing over the truck bolster adjacent the side frames. The steering arms can be retrofitted to an existing conventional (non-radially steerable) three piece railway truck regardless of the type of brake rigging the truck employs. The linkage structure includes a pivotable link located at each end of the bolster and joining the steering arms for articulated movement.

Abstract: Gas laden drilling mud is effectively handled by a centrifugal pump system which allows the flow of released gases from the drilling mud to move in the same axial direction as the mud flow through the pump; whereupon the released gases may be conducted to safe disposal areas. A hollow-centered impeller is driven by a hollow shaft through which the gases may be withdrawn. A prerotation chamber and impeller shroud below the impeller admit drilling mud into the impeller housing, providing the drilling mud with initial rotational velocity through a reduced radius, and further establishing a central opening through which gases escaping from the drilling mud will be released due to centrifugal forces on the mud. Released gases may then be removed through the central passage in the hollow shaft, which shaft may be provided with external means for preventing upward flow of fluid therearound.

Abstract: A rotary railway car coupler has a shank with a butt end portion for mounting to a coupler yoke and a head end portion on its opposite end portion. A coupler head has a guard arm side portion, a knuckle side portion and a knuckle mounted therewith for cooperative connection with another mating railway car coupler. The shank has on its head end portion a mount for rotatably mounting the coupler head. A mount within the coupler head rotatably connects the coupler head and the coupler shank for rotation of the coupler head relative to the shank.

Abstract: A well swab cup has an annular bushing for supporting a plurality of longitudinally extending reinforcing members within an elastomeric cup like body. The reinforcing members are supported around the periphery of the bushing and extend upward to a mid-portion of the body. A reinforcing member position support assembly is located above the bushing within the body to locate and position the reinforcing members in a spaced relation to each other around the swab cup.

Abstract: A well packer has a mandrel assembly with a tubular packing element supported thereon between upper and lower support members that are arranged to telescopically compress the packing element upon setting of the packer. The packer is constructed to retain the mandrel assembly in a telescopically retracted position compressing the packing element longitudinally until released. The tubular packing element has a quantity of loosely packed, heat resistant, compressible material of a substantially inorganic composition. Upon setting of the packer, the packing material is compressed to a tightly compacted configuration in order to establish a fluid tight seal between the mandrel assembly and the well bore. Because of the configuration of the tubular packing element, this packer is suited for operation in wells where substantially high temperatures are prevalent.

Abstract: A well swab cup has an annular bushing for supporting a plurality of longitudinally extending wire reinforcing members within an elastomeric cup like body. The reinforcing members are supported in a base cup around the lower portion of the bushing and extend upward to a mid-portion of the body. Approximately one half of the reinforcing wire members extend the full length of the swab cup and the others terminate at a mid-point of the swab cup's length within its elastomeric body.

Abstract: A gas bubble is circulated from a well by a system that maintains the well and bottom hole pressure substantially constant by progressively increasing the casing pressure as needed to maintain the drill pipe pressure substantially constant. An incrementally increasing casing pressure reference signal is produced by detecting each occurrence of the drill pipe pressure falling a predetermined amount below a drill pipe pressure reference signal. The casing pressure reference signal is compared with the actual casing pressure. A throttling valve is closed a corresponding amount if the acutal casing pressure is less than the casing pressure reference signal. The throttling valve is opened a corresponding amount if the actual casing pressure is greater than the casing pressure reference signal.

Abstract: A unitary cast draft sill for welding to the center sill of a railroad car comprises a unitary cast structure with the following elements and features: A horizontal top wall has a pair of side walls depending therefrom with a bottom portion having flanges extending horizontally outward from the side walls. A vertical inboard end wall joins the bottom portion, the side walls and the top wall and has a transition element extending from the inboard side portion thereof to telescopically enter adjacent portions of a railroad car center sill. A center filler plate pocket is formed by the inboard end wall, portions of the side walls and the top wall and an internal vertical wall spaced in the outboard direction from the inboard end wall to form a cavity opening at the bottom portion to accept and mount a center filler plate in welded relation. Rear draft lugs are formed at the outboard side of the internal vertical wall and adjoin the side walls.

Abstract: An improved adjusting torque wrench includes an adjusting screw that is utilized for the purpose of changing the torque setting of the wrench. The screw has a radial flange thereon having a plurality of circumferentially spaced notches in the outer periphery of the flange. The adjusting screw is fixed to the grip member and rotatable therewith relative to an adjusting nut that is fixed in the lever arm of the wrench. A detent that is movable into and out of the recesses in the adjusting screw is slidably carried by the lever arm so that when engaged in the recesses, the detent prevents relative rotation between the grip member and the lever arm, and thus prevents adjustment of the torque. Also, the detent extends exteriorly of the gripping member so that it can be grasped by the operator of the wrench and moved out of the recesses so that the wrench can be easily adjusted to a new torque setting.

Abstract: A tube expander having a stop collar for limiting the axial movement of the tube end relative to the expander to prevent damage to the tube end. The stop collar is comprised of a hollow stop collar body having the end adjacent to the tube end slotted to slidingly receive a pair of stop members that can be moved relative to each other to vary the size of the aperture extending through the stop collar body. The stop collar members substantially encircle the cage and have surfaces thereon that engage the end of the tube.

Abstract: A valve assembly is mounted with the setting tool for a hydraulically actuated well packer. The valve is located at a fluid passage in the setting tool and movable to control fluid flow from inside the setting tool to the well packer setting mechanism. In using this equipment, the valve is open when the setting tool is positioned within the well packer for setting of the well packer so fluid can pass through the setting tool and into the packer hydraulic setting mechanism. The valve is closed when the setting tool is removed from the well packer in order that fluid can flow through the setting tool and also through the bore of the well packer mandrel for fluid communication through the well tubing to a location below the packer without leakage into the annular cavity above or below the packer.

Abstract: A method of making magnesite grain having an MgO content between about 85 and 95% and consisting of periclase, calcium zirconate and dicalcium silicate.

Abstract: Apparatus for removing volatile materials from drill cuttings by vaporizing the materials on the cuttings in a non-oxidative atmosphere.

Abstract: The improved indicating device is constructed from a single piece of resilient material such as Delrin or Teflon and includes a bifurcated friction portion that is disposed in a groove in the wrench. The friction portion is constructed so that the tines can be deformed to pass through a narrow slot and frictionally engage sides of the groove. The indicator member also includes an upstanding portion that is engageable with the pointer of the torque wrench to move the indicator as the pointer moves relative to the torque scale. Since the indicator member is in frictional engagement with the torque wrench, the indicator remains at the maximum torque after releasing the torque from the wrench and permitting the pointer to return to zero, thereby facilitating reading the maximum torque exerted.

Abstract: A device for installing a taphole is comprised of a vertical wall with laterally extending base wings which conform specifically to the configuration and contours of refractory blocks and a neck with laterally extending wings which conform specifically to the interior and exterior dimensions of refractory sleeves which are attached to the blocks and form a part of the taphole.

Abstract: A tundish nozzle for use in the continuous casting of steel which has a castellated opening to prevent swirling of molten steel when poured therethrough.

Abstract: The improved torque limiting screwdriver described hereinafter includes an elongated bit receptacle that extends into a handle or gripping portion. An operative connection is made between the handle and the bit receptacle by a torque limiting device that can be adjusted to release at predetermined torque settings. The end of the gripping portion opposite to that from which the bit receptacle extends is provided with a cap member that is interconnected with means for adjusting the torque setting. The cap member provides an extension of the gripping portion and presents a smooth end to the user to avoid discomfort during the use of the screwdriver. A threaded fastener extends through the cap member into the gripping portion so that the preset torque can be locked into the torque limiting screwdriver and, thus, avoid the possibility of an inadvertent change of the desired torque setting.

Abstract: The invention relates to a rapid transit draft rigging for an automatic coupler which includes a yoke, disposed within a drawbar, which has a stem abutment extending inwardly from the rear of the yoke, passing through a shear block release member and contacting the rear surface of a follower block which is adjacent a cushioning member.