Abstract: A pump plunger formed from a centrally bored cylinder of a preferred compound having counterbored ends provided with inwardly converging counterbore inner end limits for thermally shrinking and centering a bolt and its nut therein. One end of the bolt projects beyond the cylinder and is threadedly connected axially with a plunger mounting shaft. The cylinder is turned concentric with the mounting shaft.

Abstract: A valve body having a lateral exhaust port is provided with a valve movable toward and away from a fluid inlet sealing face at its pressure connected end and guided by a valve stem projecting through the other end of the body and terminating in spaced relation with respect to a cap closing the end of the body opposite its inlet port. An axially collapsible member is axially interposed between the downstream end of the valve stem and the cap to normally maintain the flow passageway between the ports closed. Excessive fluid pressure against the valve at the inlet port collapses the collapsible member, unseats the valve and opens the fluid discharge passageway.

Abstract: In a choke valve having flow restricting stages for controlling fluid under relatively high pressure, a rising stem axially moves a valve toward and away from a valve seat opening and closing a fluid passageway through the valve. A plurality of superposed flow restriction members, each closely surrounding the valve stem and having a recess loosely surrounding the valve stem, are disposed on the upstream side of the valve seat. Slots, formed in the valve stem wall, mate and mismate with the flow restriction recesses in response to axial movement of the valve stem and control fluid under relatively high differential pressure across the valve.

Abstract: In a plunger-type oil well pipe float valve assembly permitting well fluid flow in a downward direction by a valve stem supported valve seating and unseating on a valve seat, the valve stem reciprocates in a stationary valve stem guide sleeve which supports one end portion of a coiled expansion spring surrounding the valve stem and seated at its other end on a spring retainer adjacent the valve which normally biases the valve closed. Extensions are formed on the confronting end surfaces of the spring retainer and valve stem guide sleeve for interdigitated engagement when fluid flow in a downward direction biases the valve open for preventing fluid stream induced angular rotation of the valve and its stem relative to the valve stem guide sleeve.

Abstract: A remote control operator for a fluid flow restrictor valve having a flow passageway opened and closed by an angularly rotatable disc moving ports into and out of alignment with companion ports. The valve operator comprises tangentially disposed part-circular plates with one plate secured to the restrictor valve rotatable disc and the other plate angularly rotated by a reversible drive motor. A flexible strand, secured at its ends to diametrically opposite portions of one plate, is tautly entrained intermediate its ends around portions of both plates in cooperating grooves formed in the arcuate peripheries thereof. Energizing the motor in respective directions angularly rotates the plates for opening and closing the valve flow passageway.

Abstract: In a gear case oil sampling device for use with a gear case containing a quantity of lubricating oil, an axially bored access plug is connected with the gear case. The plug includes an oil tube immersed in the lubricating oil when the gear system is idle and an air core valve normally closes the plug bore. An oil sample container slidably surrounds a piston for longitudinal movement of the container relative to the piston. An axially bored piston rod projects out of the container open end and is connectable with the access plug in a plug valve opening manner to provide fluid communication between the container and the gear case oil. A one-way clutch connects the open end of the container with the piston rod to permit manual movement of the container relative to the piston rod in one direction and reduction below atmospheric pressure in the container closed end portion.

Abstract: An engine or gearbox oil sampling device for use with an engine or gearbox containing lubricating oil. The device includes a hand held container having a flexible tube communicating with its interior. The free end of the tube is provided with a hollow member adapted for entering an engine or crankcase oil access opening. Prior to accessing oil the pressure within the container is reduced below atmospheric pressure by connecting the flexible tube with a vacuum pump through a vacuum pump head which supports a flexible and resilient stopper for sealing the end of the tube opposite the container fluid tight after reducing the pressure therein. The stopper includes a frangible wall ruptured by the hollow tubular member as it enters the oil access opening.

Abstract: In a poppet-type relief valve, including a housing having a spring guide assembly axially biasing a valve toward a seat in its inlet passageway, a soft valve seat member is coaxially disposed in the inlet passageway. The soft seat member includes a rigid surface limiting movement of the spring urged valve toward the inlet passageway and further includes a resilient ring seal positioned adjacent the rigid surface in a manner to be cushion contacted by and form a bubble tight seal with the spring urged valve before the valve contacts the rigid surface.

Abstract: An engine oil sampling device for use with an engine containing a quantity of lubricating oil and having a self-sealing centrally bored access plug connected to an engine wall.In one embodiment a tubular assembly is connected, at one end, with a container with its other end coaxially supporting a tubular needle capable of entering the access plug for filling the container.In another embodiment, the tubular assembly is provided, at one end, with a wall portion defining a screw cap for closing the open end of an upwardly open cylindrical container. In both embodiments a grommet frictionally receives the tubular needle to prevent loss of oil from the container.

Abstract: In a poppet-type relief valve, including a housing having a spring guide assembly axially biasing a valve toward a seat in its inlet passageway, a soft valve seat member is coaxially disposed in the inlet passageway. The soft seat member includes a rigid surface limiting movement of the spring urged valve toward the inlet passageway and further includes a resilient ring seal positioned adjacent the rigid surface in a manner to be cushion contacted by and form a bubble tight seal with the spring urged valve before the valve contacts the suface.

Abstract: An inline check valve housing, having a valve seat adjacent its inlet end normal to the axis of its fluid passageway, is provided with a plurality of webs projecting inwardly of its inner wall surface defining a guide for axial movement of a poppet valve having a polygonal-shaped shank toward and away from the housing valve seat. The webs each have an inwardly projecting lug at its end portion opposite the valve seat for engaging recessed spaced opposing circumferential edge portions of a valve shank guide cooperatively surrounding the poppet valve shank for preventing angular rotation of the shank guide and poppet valve relative to the housing.

Abstract: In a pressure relief valve a valve body, having a lateral exhaust port, is provided with a valve moveable toward and away from a fluid inlet sealing face at its pressure connected end and guided by a valve stem projecting through the other end of the body. A radially projecting arm, connected with the valve body opposite its inlet end, supports a cylinder having a groove therein nesting a lever pivotally connected with the outwardly projecting end of the arm and overlying the outwardly projecting end of the valve stem for receiving at least one endless rupture band therearound and normally maintaining the valve closed. Excessive fluid pressure against the valve pivots the lever out of its groove and expands the endless band beyond its tensile strength limit which unseats and opens the valve.

Abstract: A valve body, having a lateral exhaust port, is provided with a valve movable toward and away from a fluid inlet sealing face at its pressure connected end and guided by a valve stem projecting through the other end of the body. A plurality of rupture bands, extending transversely across the outwardly projecting end of the valve stem, are connected with the body for normally maintaining the valve closed. Excessive fluid pressure against the valve ruptures the bands and releases pressure through the lateral port.

Abstract: A circuit including an amplifier and resistance thermal device is interposed in and supplements the heat dissipation measuring circuit of a fluid thermal gauge probe for detecting the actual temperature of a fluid medium under test in a closed system and adjusting the output of the thermal gauge probe circuit in accordance with the fluid temperature in order to differentiate between fluids.

Abstract: An elongated housing, capable of being lowered into a cased borehole and sealed at its respective ends, at predetermined locations, with the inside surface of the casing, is longitudinally provided with a fluid bypass tube. Fluid, from casing perforations communicating with a fluid producing formation, enters the housing through a lateral inlet port in its depending end wall and flows from the upper end of the housing into the casing annulus through a ball check valve equipped port. Flow rate and thermal conductivity sensing probes, contained by the housing, are supplied with energy and connected with instruments at the surface of the earth for comparing probe data with known data obtained from the borehole fluid passing through a flow line connected with the casing at the earth's surface.

Abstract: A fluid flow control valve to be interposed in the fluid passageway of a large diameter casing projecting downwardly below the ocean thermocline for moving cold water to the surface. The depending end portion of the casing wall is provided with inlet ports. A sleeve valve, having a length at least greater than the vertical limit of the ports, is coaxially disposed in the casing and includes spaced-apart upper and lower floatation chambers slidably contacting the casing inner wall surface for opening and closing the passageway. Inflatable seals, surrounding and supported by the floatation chambers, are selectively inflated or deflated. The floatation chambers also are selectively inflated or deflated to provide or remove buoyancy of the sleeve valve in its passageway opening and closing action. Stops, secured to the inner wall surfaces of the casing above the upper limit of the ports, prevent upward movement of the sleeve valve beyond a passageway closed position.

Abstract: A fluid flow control valve to be interposed in the depending end portion of a large diameter casing projecting downwardly below the ocean thermocline and forming a cold water passageway for moving water to the surface. The valve includes a jacket surrounding the casing and spanning a transverse partition and ports in the casing wall above the partition. A control line supported sleeve valve, having a length at least equal to the spacing between the partition and upper limit of the casing ports, is coaxially disposed in the casing and includes upper and lower floatation chambers slidably contacting the inner surface of the casing wall and spaced-apart a distance at least as great as the vertical extent of the casing ports. Inflatable seals, surrounding the floatation chambers, are selectively inflated with the floatation chambers to provide buoyancy and for opening and closing the passageway in accordance with the position of the sleeve valve.