Abstract: A drawworks for drilling rigs having an improved dual brake system that divides the drill line load equally between the dual brakes, a more efficient braking action is realized by the provision of radial guide rollers positioned to urge the brake bands into concentric relation respective the brake drums which maximizes contact therebetween and results in more sensitive control of weight on bit. A chain and sprocket drive line includes flingers immersed in lub oil which effectively distributes lub oil throughout the drive line.

Abstract: Fluid treatment apparatus having an alloy disk assembly comprised of a plurality of disks, each prepared from the metal elements copper, zinc, nickel, silver, and tin, which individually exhibit great propensity for reducing scale formation in flow conduits; particularly when combined together to form the fluid treatment alloy disk assembly of this disclosure. The disk assembly is housed within a suitable enclosure having passageways arranged to effect countercurrent flow through a series of apertured disks. The close proximity of the counterflowing streams within the alloy disk assembly provide unexpected advances in the art of fluid treatment.

Abstract: A physical therapy apparatus having a padded top surface upon which a patient comfortably reclines in the face up position with the spinal area being placed in contact respective a plurality of massaging members. The massaging members are recessed within the padded top and have a massaging members extending into contact with the patients back while jointly moved along the spine with the members being individually rapidly oscillated in a circular pattern at a selected magnitude of pressure and rate of travel.

Abstract: A wireline jar tool delivers instrument packages into wellbores and retrieves tools when they get stuck. The jar has several stored spring chambers connected to accelerate an upper spring chamber away from a stuck lower carrier chamber that supports instrument packages. Wireline tension actuates the jarring action and then lowers a sinker bar for reset as many times as required to incrementally jar the un-stick fish uphole. The wire line connects to a conductor that extends inside the tool through a main operating shaft, release coupling, hammer and anvil, lost motion coupling, into the lower chamber where the end connects to the instruments for communication to the surface. A small wireline tension provides unexpected large impact forces.

Abstract: Improvements in method and apparatus for producing hydrocarbons from marginal oil wells, especially wells that previously used standard pump jacks. Substitution of the present invention for prior art production equipment solves many common problems found in the prior art, such as a well pump that experiences gas lock and pounding, which is a hindrance to efficient production in other known pump systems but is advantageous when using the Smart Pump of this disclosure. Disclosed herein is a pump assembly which senses when fluid is pumped uphole at a rate different than the rate that fluid is produced from the formation, by continually adjusting the time interval of one cycle of operation to coincide with the production history of the well.

Abstract: A fluid check valve for preventing back flow of fluid through a fluid conduit. The check valve is connected in series with a meter run to enable unrestricted normal flow to occur through a passageway in the valve body, and to prevent backflow. A throat forms the entrance into a passageway, and a valve seat is formed behind the throat. A valve cage mounts a valve element for movement within the passageway so that the valve element moves toward and away from the valve seat and during normal flow the valve element is spaced from the valve seat. Should any significant backflow commence, the valve element sealingly engages the valve seat to prevent the occurrence of such backflow. Downstream of the throat and seat there is a wall that enlarges outwardly and radially into a circumferentially extending slot having an outside diameter greater than the diameter of the passageway.

Abstract: A determination is quantitatively made of the severity of pain exhibited at a specified area on an animal by determining the magnitude of cooling required at the area of pain in order for the pain to be masked or made to disappear. The amount of cooling required for pain disappearance is considered directly related to the severity of the pain. Hence, by measuring the temperature depression required to mask the pain in a patient, an examiner can determine just how serious is the pain, and additionally provide guidance in the selection of a specific medicine. There is always some finite temperature depression required for true pain to disappear. Should the patient alleges that no pain relief is encountered by the cooling of the painful area, the examiner considers that the patient is faking his pain.

Abstract: A module for building an insulated concrete wall structure by stacking the modules together until the desired configuration of a concrete form is completed, and when the form is filled, a concrete monolithic wall structure having foam insulation permanently attached to the opposed wall surfaces to form the inner and outer wall surfaces of an enclosure is realized. The module is made of foamed plastic material, such as styrofoam, for example, and is built in a pressure molding apparatus. Each module comprises a rigid foam block of rectangular configuration having a hollow interior of a particular predetermined configuration formed between spaced apart confronting sidewalls. The inner and outer styrofoam walls of the module are secured one to the other by a plurality of spaced tension members.

Abstract: A safety ladder made special for attachment to a lubricator, or a vertically disposed pipe, which enables a person to safely scale the lubricator after it has been affixed to a well head. The improved safety ladder apparatus of this invention is externally attached to the lubricator in such a manner that a rigid triangular structure of great structural integrity results from the combination. The ladder forms the hypotenuse of the triangle and is attached at a comfortable downwardly sloped angle respective to the lubricator so that it is easy and safe to scale. The ladder has opposed side rails rigidly connected together by a plurality of spaced rungs, and an upper end opposed to a lower end. A seat or chair is attached to the upper end of the ladder and forms part of the ladder apparatus. There is an anchor device mounted at the top of the ladder that is in the form of a yoke. The yoke has a central part from which opposed legs extend into attached relationship respective to the seat at the top of the ladder.

Abstract: This invention is to an improved pecan shucker apparatus for shucking pecans, and particularly for obtaining pecan meat halves that are intact and easily freed of the undesirable parts of the pecan, such as the pecan shell and other inedible parts of the pecan. The pecan shucker is suitably supported and has attached thereto a reciprocating actuator for moving a pecan along a longitudinally disposed axis of the apparatus. A plurality of circumferentially arranged roller assemblies are arranged for the rollers thereof to be radially moved towards one another and into engagement with the outer surface of a pecan nut which may be placed therebetween, while exerting a compressive force on the pecan shell of a magnitude to crush the shell at selected areas thereof. Consequently, after the pecan shell is crushed, and the blade passed lengthwise between the halves, the pecan meat halves are shucked from the broken shell and emerge undamaged and are easily freed of debris.

Abstract: A self aligning stuffing box for a pumpjack unit of the type having a polished rod reciprocatingly extending therethrough and downhole to a pump located at the lower end of a borehole. The stuffing box has a main body that terminates in a tubing adaptor at the lower end thereof by which it can be mounted to the upper end of a wellhead. The main body forms an upward opening chamber within which an annular seal assembly for sealingly engaging the polished rod is received. The polished rod reciprocatingly extends through the seal assembly and main body. The seal assembly and chamber together form a lubrication chamber that extends outwardly about the seal assembly. The seal assembly moves within the chamber radially of the passageway to align the polished rod with the production tubing of the wellhead. The adaptor forms a pack-off that isolates the seal from the wellbore, and provision is made by which the seal assembly can be replaced without removing the polished rod from the pumpjack unit.

Abstract: An improved excavating machine for digging an unusually wide ditch having a boom that supports a plurality of chain type digging apparatus. There is a head shaft at one end of the boom and a tail shaft at the opposed end of the boom. An intermediate shaft is supported on the boom at a location between the tail and head shaft. Spaced endless digging chains are meshed with sprockets on the head shaft and selected ones of the tailwheel shaft sprockets to provide an upper run and a lower run of endless digging chain which forms an endless central digging and conveying member by which excavated material is translocated from the ground to a lateral conveyor on the machine. Spaced endless intermediate digging chains are meshed with the outermost of sprockets on the tail and intermediate shafts to form opposed, endless, outer digging and conveying members.

Abstract: A ground supported excavating machine of the type having a main frame and a prime mover for propelling the machine along the ground, and a boom supported from the frame that has an endless chain type digging member rotated by sprockets on a head shaft that is mounted at one end of the boom, and on a tail wheel shaft mounted at the opposed end thereof, to provide a lower run that engages the lower surface of the boom. The interior of the boom is made into a liquid container that communicates with the bottom surface of the boom, which is filled with sufficient liquid to transfer heat from the relatively hot boom lower surface to a relatively cold boom surface.

Abstract: A fluid check valve for preventing back flow of fluid through a fluid conduit. The check valve is connected in series with a meter run to enable unrestricted normal flow to occur through a passageway in the valve body, and to prevent backflow. A throat forms the entrance into a passageway, and a valve seat is formed behind the throat. A valve cage mounts a valve element for movement within the passageway so that the valve element moves toward and away from the valve seat and during normal flow the valve element is spaced from the valve seat. Should any significant backflow commence, the valve element sealingly engages the valve seat to prevent the occurrence of such backflow. Downstream of the throat and seat there is a wall that enlarges outwardly and radially into a circumferentially extending slot having an outside diameter greater than the diameter of the passageway.

Abstract: A method of making a bi-metal pipe section, and especially reclaiming a used or damaged pipe section by making it into a bi-metal pipe section which resists corrosion. The bi-metal pipe section is used in constructing a pipe line or production tubing that resists corrosion at the pipe coupling where corrosion is especially prevalent in fluid conduits. The bi-metal pipe section is fabricated by first removing an annular marginal end of a length of the pipe section of the prior art, to provide a long length of pipe having a partially threaded cut end opposed to an opposite end. Next, an annular short length of pipe is axially aligned and butt welded to the cut, end of the long length of pipe. The short length of pipe preferably is an annular metallic alloy having greater resistance to corrosion respective to the long length of pipe.

Abstract: A crooked, slanted, cased wellbore extends downhole to a pay zone which is produced by a rod actuated downhole pump that lifts fluid from the bottom of the wellbore up through a tubing string to a wellhead. The pump is seated in a pump cavity, and the tubing string is tensioned at opposed ends while it is rotated. The upper end of the tubing string is attached to a fluid conveying swivel and a tubing rotator. A tubing anchor having a fluid conveying rotatable mandrel is attached adjacent to and forms part of the lower end of the tubing string by which the lower end of the tubing string is rotatably tensioned and releasably affixed to the casing in proximity to the lower end of the wellbore. A plurality of radially active slips are actuated in response to manipulation of the tubing string to extend the slips into engagement with the casing wall and to retract the slips in order to remove the tubing string from the borehole.

Abstract: A clamp assembly for joining perpendicularly arranged, square, elongate, structural members to form a framework. The clamp assembly comprises a pair of shaped gripping members aligned in confronting relationship respective one another and have opposed parts that form opposed sockets which are arranged perpendicular to one another. One of the sockets receive an end of one structural member therewithin, the other of the sockets receive a medial length of another structural member therewithin to secure the perpendicularly arranged structural members together. Each gripping member is of unitary construction and has a planer surface that is divided into a first socket forming member and a second socket forming member by a through bolt extending perpendicularly therethrough.

Abstract: An injection well has become plugged with an accumulation of undesirable material that is causing the wellhead pressure required to effect a selected minimum flow rate of injection fluid into the formation to have increased to a maximum value. The method of this invention provides a process for treating the plugged formation to remove the accumulated undesirable material. The process requires a plurality of treatment cycles, and in each cycle injection fluid flows into the wellhead for a first time interval while injecting treatment chemical into the flowing injection fluid during a second time interval, with the first time interval being much longer than the second time interval. The well is acidized after a multiplicity of cycles and returned to operation.

Abstract: A process for separating nitrogen and hydrocarbons from a mixture of gases by splitting the mixture into a plurality of separate streams and throttling the flow of each stream to achieve a selected variable flow rate therebetween. The plurality of separate streams are individually cooled by exchanging heat with a plurality of different process streams. The cooled streams are combined and expand into a separation column where nitrogen ascends the column and exits as a process stream while hydrocarbon descends the column to a reboiler thereof and exits as a process stream. The reboiler is used for cooling one of the separate streams. The hydrocarbon from the bottom of the column is expanded and used to cool a reflux condenser located inside the column and thereafter cools another of the streams before it is discharged from the process. The nitrogen process stream is used to cool another of the separated streams, and then is discharged from the process.