Abstract: An auxiliary well pressure packoff assembly for wireline control valves is positionable within the downstream passage of a wireline valve body without requiring cutting of the wireline and receives the wireline in surrounded, sealed relation. A retainer closure positively retains the packing assembly within the valve body passage. An externally controllable mechanism is provided to displace resilient sealing material of the packing assembly to enhance the sealing relationship thereof with the wireline and valve body passage, thus providing an auxiliary seal to protect workers from hazards in the event well pressure should leak past the wireline control valve mechanism. The packoff assembly also clamps the cable to prevent it from moving and vents any leaked well pressure to a safe location. An automatic pressure activated self-energizing feature is provided which increases sealing capability of the system in proportion to increase in well pressure.

Abstract: A rotary drill bit for use in drilling or coring deep holes in subsurface formations comprises a bit body having a shank for connection to a drill string and a plurality of cutting elements mounted at the surface of the bit body. Each cutting element is bonded to a stud which is received in a socket in the bit body. Spaced rearwardly of each cutting element is a separate abrasion element comprising a stud which is received in a socket in the bit body and is impregnated with particles of natural or synthetic diamond. The abrasion element provides a back-up in the event of failure or excessive wear of the cutting element and its spacing from the cutting element prevents the damaging transfer of heat from the abrasion element to the cutting element. The cooling may be enhanced by providing a channel for drilling fluid between the cutting element and abrasion element.

Abstract: A roller carriage assembly for a road surface finishing machine of the type having an elongated main frame is disclosed. The assembly features a vibrating drum or roller wherein rotating eccentric weights used to generate vibrations can be rotated at speeds which are independent of the speed of roller rotation to thus permit the finishing of extremely low slump concrete. The assembly employs a scissors extender system which permits rapid and precise changes in the level of the roller relative to the main frame without affecting the attitude of the former relative to the latter. The scissors extender system is locked in place by a rotating locking mechanism and is rigidified by the use of four chains disposed at the corners of the system and strung between upper and lower plates between which the scissors mechanism operates.

Abstract: A cutting element for use in rotary drill bits comprises a generally cylindrical stud and a cutting disk bonded to a supporting surface of the stud. The supporting surface intersects a cylindrical side surface of the stud to form an edge. The supporting surface includes a plurality of alternating projections and grooves extending in a front-to-rear direction of a supporting surface. The projections and grooves include rear ends terminating short of the edge to minimize the formation of stress cracks in the edge.

Abstract: A stripping gland is specially designed to act on uneven surfaced leads or the like making up a bundle that extends down into a well. It includes plural interior annular grooves which accommodate flexible seals. It also has an upper cylindrical chamber that has a highly elastic stationary seal which may be compressed tightly around the bundle.

Abstract: A subsurface safety valve having a piston and cylinder assembly for actuating the safety valve. First and second flow sealing valves are positioned in communication with a flow control passageway to the assembly in which said first and second valves open and close in response to the movement of the piston relative to the cylinder. The first valve shuts off fluid flow from the fluid control passageway to the assembly when the safety valve is open and the second valve to shuts off fluid flow from the cylinder to the fluid control passageway when the safety valve is closed. A third valve may be positioned on the side of the piston in communication with the fluid control passageway and is redundantly positioned with the second valve. A lost motion connection may be provided for sequentially actuating the second and third valves.

Abstract: A cutter element for a rotary type rock bit used in drilling soft earth formations in which the cutter element includes a base and a generally dual pyramidic cutting tip. The cutting tip extends from the base to a crest and is formed having axially symmetrical opposite flanks that extend longitudinally merging toward a distal end at which a single elongated crest of substantially uniform width is formed about an apex.

Abstract: A rotary drive apparatus is provided for connection to a rotary drive string extending downwardly in a well to a rotary downhole pump. Separate axial load bearing and rotary drive spindles are provided and are separately connected to the rotary drive string by readily releasable connectors so as to permit axial adjustment of the rotary drive string while preventing loss of the string into the well in the event of release or slippage of one of the connectors. The design also permits repair or adjustment of the drive apparatus without removal of the rotary drive string from the well.

Abstract: A mineral mining installation employs a scraper-chain conveyor constructed from individual pans joined end-to-end and a plough having a drive plate running beneath the conveyor and on a skid bed formed as a sub-frame structure on the floor of the working. The drive plate is connected via guide means to the haulage run of a chain in a lower guide passage at the side of the conveyor opposite to the plough. An upper guide passage accommodates the return run of the chain. The passages are defined by a guide structure fitted to the side walls of the pans and includes detachable covers which can be removed for access purposes. At least some of the covers are linked with the sub-frame structure with the aid of tongue-and-groove connections.

Abstract: A hydraulically actuated slip assembly having a slip pivotally connected at its sides by parallel links to the side surfaces of a slip block with slip engaging surfaces which allow the slip to be engaged and disengaged from tubing or pipe and operated within a reduced area. An alternative embodiment utilizes a floating die to allow the parallel links to disengage the slip from the pipe in a compact configuration.

Abstract: A height adjustment device for a front mount mower including a support frame pivotally attached to the mower deck at the point where the rear of the mower deck is supported by push arms extending forward from the drive vehicle. The forward portion of the support frame carries a pair of ground engaging wheels and the forward end of the mower deck is disposed to be attached to and supported by the support frame at one of a number of vertically spaced positions. A cable connection between the push arms and the support frame automatically levels the rear of the mower deck with the adjusted level of the front of the mower deck.

Abstract: A tool for gripping and moving an alternator or generator about a pivot point on an engine, or the like, to tighten the driven pulley of the alternator or generator against a drive belt or chain. A handle attached by a swivel connection to an adjustable pressure pad to aid in such moving motion. A flat band capable of being disconnected at one point to allow the tool to encircle an alternator or generator housing. The pressure pad affixed to the band in such a manner as to allow a screw-like advancement of the pad between the band and the alternator or generator housing. A friction coating covering both the band and the pad.

Abstract: A sprocket wheel for driving a saw chain of a chain saw including a pair of annular sprocket wheel members of the same shape and configuration each formed on one side surface thereof with elevated surface portions of a number which is one-half the desired number of the teeth of the sprocket wheel produced as an end product by joining the sprocket wheel members together in such a manner that the one side surfaces thereof having the elevated surface portions face each other.

Abstract: In accordance with an illustrative embodiment of the present invention, a side pocket mandrel includes a tubular main body having an internal bore, a seating section w4elded to one end of said main body and having a main bore and a laterally offset seating bore opening to the exterior thereof, the axis of said seating bore being inclined at a small angle toward the axis of said main bore, said seating bore having a polish section at the outer end thereof and a latch shoulder adjacent the inner end of said polish section, and a gas flow opening communicating said seating bore with said main bore at a location inwardly of said polish section. A tubular member having an orienting sleeve therein is welded to said seating section in alignment with said main bore, and a swage nipple is welded to the opposite end of said main body. All of said welds are transverse to provide a high strength and compact mandrel assembly.

Abstract: A latch and retrieving assembly is shown for use with a well tool having an axial bore which includes an external landing shoulder and an annular latch recess which is spaced below the landing shoulder. The assembly includes a mandrel which is inserted in to the bore of the well tool. The mandrel has a lower abutment and a collet member carried about the mandrel above the abutment. The collet member includes a carrier ring which is seatable on the shoulder and a plurality of fingers which depend from the carrier ring and which terminate in radially enlarged tips which are disposed in registration with the recess when the carrier ring is seated on the landing shoulder. The tips cooperate with the lower abutment to latch into and to be released from the recess respectively in response to downward movement of the mandrel. A special profile formed on the mandrel lower abutment provides latching engagement and subsequent release of the assembly upon downward movement of the mandrel relative to the collet.

Abstract: In a scraping roller mounting apparatus for scraping machines for scraping off roads, a motor-driven scraping roller is mounted rotatably by both ends in a frame arranged transversely to the direction of travel and attached to the chassis by two vertically adjustable mounting members. The frame is guided on the chassis by two dovetail-type slide and thrust guide members arranged at a mutual interval and aligned vertically.

Abstract: A method for completing a drainhole wellbore with casing but without conventional cementing of the casing wherein in the drainhole portion of the wellbore a casing string composed of alternating casing subs and external casing packer subs is employed, the external casing packer subs carrying an elastic member adapted to be expanded and form a seal between the exterior of the casing string and the wellbore wall, and one or more of the external casing packer subs is activated to expand the elastic member carried by same thereby providing for isolation of discreet segments of the casing string in the drainhole portion of the wellbore to allow for localized production and remedial treatments in the drainhole wellbore.

Abstract: A road surface layer reproducing machine is characterized by its rotor unit which is provided with a mixing chamber housing the rotors for scarifying and mixing the asphalt pavement in an atmosphere of a high temperature higher than the temperature of open air to facilitate such a scarifying and mixing operation of the asphalt pavement, which mixing chamber is kept at such a high temperature by the operation of heating means such as a heater and a hot air blower, and is vertically driven through power cylinders.

Abstract: A pack-off assembly (P) for a wellhead system (W) comprising of a pack-off nut (36) with a tapered pack-off (40). The pack-off nut (36), in one embodiment, contains an internally tapered split ring (44) having multi-start threads (46) for engaging similar mating multi-start threads (32) on the casing hanger (C). The casing hanger (C) external surface (20) is provided with a taper which faces the surrounding internal cylindrical wall (16) of the wellhead (W) thus providing a tapered annulus (14).The pack-off assembly (P) is lowered to the wellhead (W) in a running tool (T) where the pack-off (40) is moved into the tapered annulus (14) without rotation of the pack-off nut (36) and the pack-off nut (36) is stabbed over (the mating threads (32, 46) ratchet) by the weight of the tubing string.

Abstract: Provided is a dust control attachment for long wall mining equipment featuring a water spray head fixed on the end of an arm which is mounted in a manner to be movable in the horizontal and vertical planes whereby the spray is substantially directable to any desired situs during mining operations.