Abstract: In accordance with illustrative embodiments of the present invention, a combination stuffing box and pressure transmitter system for use with a reciprocating rod or plunger pump includes a housing that carries primary and secondary seal assemblies separated by an oil-filled chamber. A pressure transmitter transmits the pressure of the fluid being pumped to the oil in the chamber so that the secondary seal assembly operates under substantially balanced pressure conditions with little or no tendency of the pumped fluids to leak past it, while the primary seal assembly operates under optimum conditions to prevent leakage of oil having known characteristics to the environment.
Abstract: A coating removal machine or carriage (22) for a pipe (10) has an enclosed housing (44, 46, 48, 50) extending about front and rear tool carriers (74, 76) which rotate in opposite directions about the pipe (10) and have coating removal tools (116, 118, 120) for removing the coating material from the pipe (10). The removed coating material (12) is collected in removable bags (66) beneath the machine (22) for disposal at a separate remote disposal site. A dust collector (28) has a vacuum line (32) extending to the enclosed housing (44, 46, 48, 50) to remove minute coating particles which are suspended in air or air borne. One embodiment (FIGS. 10 and 11) is provided for a fixed installation. Another embodiment (FIGS. 13-15) includes water under pressure discharged from nozzles (63B) to remove the coated material (12) from the pipe (10).
Abstract: In accordance with an illustrative embodiment of the present invention, a connector assembly for plugging geophones into a leader cable includes rigid thermoplastic inserts that are positioned within molded polyurethane bodies and molecularly bonded thereto. The male connector member carries a replaceable silicone O-ring seal in an external annular groove therein which engages an internal annular recess on the female body when the connection is made up. The seal keeps out moisture, and releasably couples the connector members together.
Abstract: In accordance with an illustrative embodiment of the present invention, a method of extinguishing an oil well fire includes positioning an elongated tubular member in an upright position over the opening of the well with the lower end of the member engaging the ground to substantially contain the flame to the interior thereof and to shut off the supply of air into its lower end, and forming an earth back-fill around the lower end portion of the tubular member to shut off all supply of air into its interior.
Abstract: A calender (10) has a plurality of leaves (12) each representing a month of a year. Each leaf (12) has an outer transparent cover forming a pocket for inner and outer sheets (24,26). Inner sheet (26) has numerals therein in a precise pattern which are registered with apertures (30) in the outer sheet (24) to represent the days of the month. Inner sheet (26) has seven columns of numerals and is slidable a maximum distance no greater than the width of one column in order to adapt calendar (10) for all years.
Abstract: An apparatus and method for covering an opening (14) in the damaged metal hull (12) of a ship (10) including a flexible covering material (16) having a plurality of electromagnets (36) embedded therein between inner and outer layers (30, 34) and arranged in generally transverse rows. Electrical energy is applied in sequence to the electromagnets (36) after unrolling of the flexible material (16) alongside the hull (12) between the lowermost row of electromagnets (36) and the uppermost row of electromagnets (36). Fluid assist members (48) are provided to force the flexible material (16) toward the hull (12).
Abstract: A mounting bracket apparatus for securing a relatively heavy item of equipment such as an electrical transformer to an upstanding object or structure such as a utility pole. The mounting bracket employs a plurality of elongated and symmetrically shaped object contact members that each contact the pole at spaced gripping locations to enhance the frictional contact force.
Abstract: A method and apparatus for cleaning the outer periphery of a pipe (10) by a carriage (28) travelling along the pipe (10). A housing (58) supported from an upper support frame (56) of the carriage (28) includes a pair of housing halves (58, 60) pivotally connected to each other and forming an enclosed chamber about the pipe (10). Nozzles (94) on the housing (58) are spaced about the pipe (10) for the discharge of a cleaning material in a high velocity stream against the outer surface of the pipe (10). A lifting head (114) connected to the housing halves (58, 60) pivots the halves (58, 60) to an open position and also lifts the carriage (28) from the pipe (10). An embodiment shown in FIGS. 8-10 includes a housing (58B) mounted on rollers (85B) of carriage frame (56B) for oscillation of housing (58B) and nozzles (94B) in an arcuate stroke relative to the carriage frame (56B).
Abstract: A method and apparatus for safely disposing hazardous waste in a borehole extending through a seal for a subsurface geopressured formation wherein sealed elongated containers filled with hazardous waste are lowered in the borehole to be positioned within a geopressured formation where the containers are encased in the borehole. In an alternative embodiment, hazardous waste is disposed in the borehole by pressuring the liquid waste and injecting the waste through perforations in a borehole casing directly into the pores of a geopressured formation. The pressurized liquid fractures the geopressure formation and upon release of the pressure on the waste liquid the waste is trapped in the geopressured formation. The seal of the geopressure formation is then restored for providing safe disposal.
Abstract: In accordance with an illustrative embodiment of the present invention, a restriction sub apparatus for use during well cementing operations includes a tubular body having an internal annular recess, and a plastic restriction sleeve mounted in the recess, such sleeve having an inner diameter which is less than the inner diameter of the body so that when a drive plate on a cement displacement plug encounters the inner portion of the sleeve during downward movement, such inner portion is progressively deformed and bulged inward until the bulge dissipates into a recessed region near the bottom end of the sleeve. The resistance afforded by the plastic sleeve to downward movement of the plug provides a positive pressure surge indication at the surface that the plug is located at a particular depth in the casing.
Abstract: An automated trash management system for remotely measuring the fullness of a plurality of trash containers is disclosed. Each container is provided with a remote sensing unit for generating a signal proportional to a characteristic of the container by which the extent of fullness of the container may be determined. A transmission linkage, typically a telephone line, is provided from each remote sensing unit to a central unit, where a data base of the signals transmitted from a particular trash container may be stored and analyzed. A hauler is called from the central unit location by a user after a determination from the data base that a particular trash container is in a condition of fullness warranting emptying.
Abstract: A seat assembly (28) for a valve member (20) includes a seat carrier (40) defining a pocket to receive a rigid seat ring (42). The outer peripheral surface (56) of the rigid seat ring (42) is spaced radially from the inner peripheral surface (45) of the seat carrier (40) to define a radial clearance therebetween of at least around 0.001 inch per inch of flow passage diameter. The sealing surface (58) of the seat ring (42) extends at 45 degrees to the longitudinal axis of the flow passage and the flexing and expansion of rigid seat ring (42) when the valve member (20) is moved to closed position permit the seat ring (42) to conform to irregularities in the adjacent mating sealing surface.
Abstract: Apparatus and method for detecting fluid leakage into an enclosed leakage chamber or space sealed by a fluid seal exposed to pressurized fluid from a flow line or pressure vessel. Upon leakage of fluid from the flow line or pressure vessel past the seal into the leakage chamber or space, the leaked fluid is communicated to a piston chamber in a fluid indicator device. Upon the reaching of a predetermined high fluid pressure, the piston is actuated for extending an indicator rod of the fluid indicator into a projected position for visual observation. For testing or inspection of the leaked fluid, a separate removable adaptor is provided for moving the piston to a fluid bypass position to permit removal of fluid from the piston chamber containing the leaked fluid, or to permit injection of an external fluid such as a sealant into the piston chamber and leakage chamber.
Abstract: A clip (20) for supporting a vine or plant stem (S) on a pair of planks (12, 14) of a wooden fence (10). The clip (20) has an elongate body portion (22) and a pair of legs (24, 26) extending in opposite transverse directions relative to the longitudinal axis L of the elongate body portion (22). The clip (20) is mounted within the space (T) between opposed side edges (16, 18) of the wooden planks (12, 14) with the legs (24, 26) having projecting gripping elements (30) for biting into and gripping the wooden side edges (16, 18) upon insertion of the legs (24, 26) within the space (T) between the side edges (16, 18). Upon installation of the clip (20) with the plant stem (S) received between the legs (24, 26) and inward depression of the legs (24, 26) for fitting between the side edges (16, 18) a torsional loading of the elongate body portion (22) occurs.
Abstract: In accordance with an illutrative embodiment of the present invention, a fluidic oscillator includes a transverse vacuum port which extends between the diffuser legs a predetermined distance below the leading edge surface of the splitter. When flow is down one leg, a slight negative pressure condition is created in the port and transmitted thereby to the other leg, which causes switching of the flow to such other leg. The process then repeats in response to negative pressure in the one leg to cause switching of the flow back thereto. Fluid flow thus is switched back and forth between the legs at a resonant frequency, so that continuously fluctuating pressures are applied to the surrounding medium.
May 26, 1992
Date of Patent:
November 24, 1992
David M. Facteau, Timothy A. Cobb, Michael D. Hyman
Abstract: In accordance with an illustrative embodiment of the present invention, a positively operable stop collar for providing a bridge in a well casing that prevents reverse flow of cement slurry includes a tubular body having upper and lower stop rings positioned in upper and lower recesses therein, seal rings between the recesses, and a bevel on the upper stop ring that is engaged by an inclined surface on the drive plate of a displacement plug to expand the upper stop ring and allow the drive plate to pass through the upper stop ring and to be locked in engagement with the seal rings.
Abstract: In accordance with illustrative embodiments of the present invention, a hydrostatic pressure-responsive safety sub that prevents firing of an explosive well tool until it has been lowered below a predetermined depth in a fluid-filled well bore includes a body having an upper chamber that houses a detonator and a lower chamber that houses a booster which is attached to a primercord. A passageway between these chambers normally is blocked by an inner portion of a spring-loaded, hydrostatic pressure-responsive piston which is shifted inward against the bias of a combination of springs. When the explosive tool has been lowered to a predetermined depth in the well, a bore in the piston becomes aligned with the passageway between the chambers so that explosive forces generated by explosion of the detonator can reach the booster.
Abstract: A resistance device is disclosed for use with exercise equipment such as cross-country ski simulators, stair climbing machines, stationary bicycles and the like. The restraint device includes a rotating assembly disposed about a supporting member such as a rod. The rotating assembly includes a cylinder which is connected by means of a flexible cable or the like to foot pads of the ski simulator or step members of the stair climbing machine, for example, such that to-and-fro or up and down (bi-directional) motion of the exercising machine is converted into angular velocity of the rotating assembly. The rotating assembly includes weighted pivoting members arranged to pivot with respect to the assembly such that with increasing angular velocity of the rotating assembly, the pivots are forced radially outward thereby smoothly increasing the moment-of-inertia of the device.
Abstract: A roller cutter drill bit (10) has separate bearing elements (82, 84, 86) positioned between a journal (20) and a roller cutter (60) mounted for rotation on the journal (20). The bearing elements (82, 84, 86) are formed of a superalloy material and the bearing surfaces of the bearing elements (82, 84, 86) have an aluminide coating applied thereon to form a bearing surface stable at operating temperatures over 500 F. and as high as 1000 F.
Abstract: In accordance with illustrative embodiments of the present invention, an oil well fire fighting vehicle includes a reciprocated cable mechanism to cut off damaged well casing above ground level, and a slot region and gripping members that attach the vehicle to the cut-off casing when the vehicle is positioned thereover. A diverter deflects the oil flow away from the front of the vehicle, and a packer and valve assembly are forced down into the casing to pack-off the same and confine the oil flow to the valve which can be closed to shut in the well. Various heads for controlling the flow of oil from the well also are disclosed.