Abstract: A pump-off controll device for controlling a pumpjack unit. The device measures the length of time required for the pump to downstroke successive numbers of times, and when the time differential reaches a predetermined value, the well is shut-in for a time interval.

Abstract: Apparatus for achieving shadowless pictures, comprising a unitary mounting bracket for supporting a camera and a flash unit in spaced relationship respective to one another. The flash unit is optimumly positioned above and rearwardly of the camera lens at a distance which avoids "red eye" and at the same time eliminates shadows. The flash unit can be moved circumferentially 90.degree. about the camera lens to enable the flash unit to be properly positioned for the camera to be used in either the vertical or horizontal format.

Abstract: Method and apparatus for hanging and sealing a tubing string in a high pressure wellbore. The invention discloses apparatus which enables the pulling of a tubing string on an injection well to be achieved without having to kill or bleed down the formation pressure. A support and flow control apparatus is provided for supporting the upper end of a tubing string that extends downhole in a cased borehole, while packing off the annulus between the tubing and the casing. The apparatus includes a tubing hanger which is connected to the upper end of the wellbore for supporting the upper end of the tubing string therefrom so that the string is in tension.

Abstract: Apparatus by which a check valve assembly of a reciprocating pump can be removed. A valve stem of the valve assembly is received within a valve guide which is mounted in a valve guide bracket. The bracket is pivotally attached to a yoke. The yoke is removably fastened to an adaptor. The adaptor is seated in an access port arranged perpendicular respective to the passageway within which the valve seat is mounted. The compressive force of the valve spring maintains the bracket and yoke in assembled configuration respective to the adaptor. The bracket and yoke can be pivoted apart, against the spring force, and removed through the adaptor and then the adaptor can be removed from the access port, thereby gaining access to the remainder of the valve assembly.

Abstract: A pump-off control for a pumpjack unit. The pumpjack unit has a flow line therefrom connected to a tank battery. A control device is connected in the flow line so that all of the production must flow therethrough. The control apparatus includes an orifice placed in the flow line and a bypass arranged for flow to occur around the orifice. A movable member is placed within the bypass and each stroke of the pumpjack moves the member in proportion to the quantity of liquid flowing therethrough. The movable member is connected to actuate a switch device, indicator, chart, and counter. The orifice is sized respective to the movable member so that each stroke of the pumpjace causes the movable member to move in proportion to the produced fluid forced through the bypass. The switch device is positioned to be actuated at a predetermined flow rate each stroke of the pump.

Abstract: Heads of lettuce are mechanically torn into bite size portions. Each head of lettuce is washed, the outer leaves and core removed, and the cleaned heads are introduced one at a time into a rotating cylindrical basket. The basket upwardly opens and has holes formed in a sidewall thereof of a size to admit torn bite size pieces of lettuce therethrough. The basket rotates about a vertical axis at a speed that engages and tears the heads of lettuce into the bite size pieces. A catching bowl is placed concentrically about the basket and in spaced relationship thereto. The bowl receives the torn lettuce that is thrown through the wall of the rotating basket.

Abstract: A drill string is rotated by a top drive system and includes a floating sub which interconnects the upper end thereof with the drill pipe, and a bit at the lower end thereof. The bit is connected to the lower end of the drill pipe by means of a shock absorber. The floating sub prevents vibrational energy from the drill string from damaging the top drive system while the shock absorber prevents vibrational energy from damaging the bit and vice versa.

Abstract: An improved sawhorse has a horizontal central member supported at each end thereof by a special support assembly. Each of the support assemblies have a hinge formed at an upper end thereof by which it is hinged to the marginal end of the horizontal member. Each support assembly is foldable towards one another from a rigid, load bearing configuration into a storage configuration to present a small compact package for storage. Each of the support assemblies comprises a bracket at the upper end thereof which is attached to opposed marginal ends of the horizontal member; and an extension member is pivotally attached to the bracket. A latch device is included for latching and unlatching the extension member to the bracket. The support assembly terminates in a base at the lower end thereof, and includes a pair of diverging legs.

Abstract: A digging tooth and holder therefor for use with an excavating machine including trenchers and backhoe buckets. The tooth holder is suitably attached to the excavating machine, and includes a tooth receiving pocket formed therein for removably receiving the shank of a digging tooth in an improved manner therein. The digging tooth shank rearwardly extends from the tooth and is made into a special configuration which enables power applied thereto from the excavating machine to be transferred into the working end of the tooth in a new and unusual manner. The working end of the tooth inculdes an elongated, concave upper surface, a cylindrical lower surface, and a plurality of longitudinal extending reinforcing ribs which are formed on the cylindrical lower surface, all of which cooperate together to impart great strength into the tooth and also enables the tooth to dig in hard formations in an improved manner.

Abstract: A method and apparatus of chemically inhibiting corrosion of a borehole and connected flowlines. A mixing tank receives flow from the chemical pump. The mixing device is connected to the borehole. A timer device operates to allow sequential flow to the mixing tank. The treatment fluid admixes with the formation fluid downhole.

Abstract: A safety device for disconnecting an electrical appliance from a power supply, and thereby preventing electrical shock hazards. A normally closed switch connects the appliance to the power supply. A frangible device, such as a flash bulb, maintains the switch in the closed position. A sensor detects a dangerous condition and actuates the flash bulb, which action fragments the envelope of the bulb, whereupon the switch assumes the open position, thereby disconnecting the appliance from the power supply.

Abstract: A diverter or rotary drill head has a rubber stripper assembly mounted to a stinger flange. An annular retaining collar is releasably received within the upper marginal end of the drill head main body. the retainer collar is axially spaced from a shoulder formed on the main body to form an annular area therebetween within which the stinger flange is rotatably received in low friction relationship. The retainer collar is held in assembled position by a plurality of retractable radially spaced dogs. The dogs are retracted to permit the stripper rubber, stinger flange, and stinger to be lifted free of the main body. This enables repairs to be rapidly and economically effected on the rotating parts of the diverter and provides a seal means by which well blow-outs can be diverted away from the drilling rig.

Abstract: A stream of contaminated liquid flows into a vessel, through a filter media comprised of at least 50% pecan hulls, while clean liquid exits the vessel, leaving the contaminants deposited on the filter media. The deposited contaminants are scrubbed from the media by circulating the media along a toroidal flow path within the vessel until the contaminants have been transferred from the media into the liquid. The scrubbing action is achieved by a pump suction which is spaced from a pump discharge. The pump discharges through a perforated nozzle. The nozzle extends through a housing. An annulus is formed between the nozzle and the housing. Dirty scrub water flows from the pump, through the nozzle perforations, into the annulus, and away from the vessel, while at the same time the toroidal flow path is maintained.

Abstract: A highway marker for attachment to a roadbed to signal the location of a lane extending longitudinally of the roadbed and to signal the proper direction of movement in a traffic lane while defining the boundaries of the traffic lane. The marker has a bottom surface for attachment to a roadbed, a base and adjacent sides are perpendicularly arranged to the base and describe the boundaries of a triangle. A triangular floor in the form of a triangle has a base coincident with the perpendicular base and sides spaced inwardly from the perpendicular sides with there being a peeked boundary formed between the perpendicular adjacent sides and the adjacent sides of the floor. A reflective surface on the perpendicular adjacent sides form an arrow indicating a direction of travel while another reflective surface on the floor indicates an opposite direction of travel respective to the first arrow and can be of various colors.

Abstract: The difficulty of applying uniform plastic coatings to the interior of pipe and other tubular goods increases in proportion to the diameter and length of the pipe. Epoxy is one of the most satisfactory plastic coatings for use on oilfield pipe. An epoxy coating preferably is applied on powdered form to the heated, rotating pipe interior, where the plastic is fused into a continuous film and thereafter the pipe is cooled as the film solidifies to provide a superior coating which protects the metal pipe surface from chemically reacting with the material flowing therethrough, thereby elongating the life of the pipe.

Abstract: An automatic water delivery system for transferring water from a storage container to an ice maker. A pump is connected to be driven by an electric motor. The suction of the pump is connected to a container, and the outlet of the pump is connected to the ice maker control valve. When the pump is actuated, water is forced to flow from the container to the ice maker on demand. The discharge from the pump is connected to a high pressure normally closed switch and a low pressure normally opened switch. The switchs are each connected by circuitry to energize the motor whenever the pressure at the pump discharge is within the predetermined range of pressure. An air exhaust valve for exhausting compressible fluid from the interior of the pump and away from the pump discharge is included in the system. This novel arrangement permits flow of water from the pump discharge to proceed directly to the icemaker, and, whenever air is present in the chamber, air is forced to exit the system.

Abstract: A method of powder coating the inside of tubular goods, such as oilfield pipe and the like, by connecting one end of the pipe to a means for producing a flow of compressible gases therethrough. The other end of the pipe is open to atmospheric pressure. A valve means is connected for controlling the flow of air through the container which holds a single charge of plastic powder. The charge of powdered plastic is isolated upstream of the pipe inlet. The charge is of sufficient size to coat the entire inside peripheral wall surface of the pipe with a substantial uniform coating of plastic. The pipe is heated above the softening temperature of the plastic and axially rotated, so that when the valve is opened, air flows through the container, into the pipe, and establishes a pressure gradient across the entire length of the pipe. This action causes the captured charge of plastic to form a pocket of dispersed plastic particles which is forced to flow through the pipe by the air flow.

Abstract: A remote actuator for a trailer hitch of the type having a main body, a ball receiving socket at one end of the main body and the other end of the main body being attachable to the end of a tongue, for example. A pivotal member is hinged at the ball receiving socket end of the hitch. The main body and the pivotal member form hinged sections and the socket is formed jointly in the two hinged sections. A collar is reciprocatingly received about the main body in a position to releasably receive the free marginal end of the pivotal member therein to thereby releasably latch the hinged sections together so that a ball can be captured therewithin. A remote actuator is mounted to the hitch apparatus by which the hinged sections are forced together and thereafter the collar is moved into the latched position over the hinged sections. The remote actuator includes a control lever pivotally mounted for movement respective to said main body.

Abstract: A nursing shawl for use by mothers who nurse their infant. The shawl comprises two opposed panels joined together at the adjacent top corners by a neck band to provide a unitary shawl which can easily be placed about the mother and infant while the mother is seated. The panels drape over the shoulders and hang in front to conceal the nursing infant and the entire front of the mother from the neck to the waist. The confronting edges of the panels are fastened together by hook and loop fasteners. The shawl enables the mother and infant to view each other while the infant is nursing, and preserves their privacy.