Abstract: Two bushings are aligned coaxially with a bore in a part in preparation for installation concentrically in the two ends of the bore with an interference fit, using an elongated mandrel which is maintained coaxially on the bore centerline by a guide inserted in one end of the bore while the bushing is pressed into the other end of the bore. The force to press the bushings into the bore is exerted by a pulling tool to which the mandrel is coupled, and that force is transmitted through the mandrel to the bushing by way of a collar attached to the mandrel. The force of the pulling tool exerted on the mandrel is reacted through an anvil attached to the barrel of the pulling tool and effectively in contact with the side of the part opposite to which the bushing is being pressed into the bore. The faces of the collar and the anvil are machined flat and perpendicular to the axis of the mandrel so that the squeezing force exerted between them on the bushing and the part is parallel to the axis of the bore.

Abstract: A continuous flow intersection for accommodating traffic from a plurality of road surfaces includes a first road surface for traffic traveling in a first direction. A second road surface is provided for traffic traveling in a direction opposite to the first direction. A third road surface is provided for traffic traveling in a direction intersecting the first and second road surfaces. A fourth road surface is provided for traffic traveling in a direction opposite to the traffic traveling on the third road surface. The first and second road surfaces intersect the third and fourth road surfaces and are disposed at a first elevation distinct relative to the third and fourth road surfaces in an area adjacent to the intersection. At least a first road surface left turn lane is disposed along the first road surface at a point displaced a predetermined distance from the intersection.

Abstract: A method of aqueous flooding of subterranean oil bearing formation for tertiary oil recovery involves injecting through a well into the formation a low alkaline pH aqueous sodium bicarbonate flooding solution. The flooding solution's pH ranges from about 8.25 to 9.25 and comprises from 0.25 to 5 weight percent and preferably about 0.75 to 3.0 weight percent of sodium bicarbonate and includes a petroleum recovery surfactant of 0.05 to 1.0 weight percent and between 1 and 20 weight percent of sodium chloride. After flooding, an oil and water mixture is withdrawn from the well and the oil is separated from the oil and water mixture.

Abstract: A tube shaped sleeve apparatus which includes two cylindrical components adapted to be connected to each other and sections of tubing string by cooperating threads formed at the ends thereof. At spaced intervals in the periphery of the sleeve are a plurality of radial holes or ports and formed in the sleeve bore at opposite ends thereof are stops shoulders. Adapted to be inserted in slidable relation inside the bore of the tubing sleeve is a mandrel which includes a plurality of resilient O-rings or gaskets that are secured in the periphery of the mandrel inside annular grooves formed therein. Formed in the bore of the mandrel and at opposite ends thereof are a second set of stop shoulders. When positioned opposite the holes in the sleeve, the periphery of the mandrel and the gaskets form a tight seal with the wall of the sleeve bore to prevent fluids and gases from the well bore from entering and escaping the tubing sleeve.

Abstract: A scraper for pipe is provided with scraper blades having arcuate scraper surfaces projecting therefrom with the blades movable radially between a contracted and expanded position which provides a first minimum diameter of the scraper surfaces in contracted position and a second maximum diameter when in expanded position which extends at least to the maximum internal pipe diameter, and an adjustment arrangement which enables said arcuate scraper blades to be adjusted radially to maintain said first and second diameters as the scraper surfaces wear.

Abstract: An apparatus for automatically dispensing chemicals into the well bore of a hydrocarbon producing well utilizes a double acting cylinder and piston to sequentially operate a plurality of valves associated with the well. The handles of each valve have a spring steel tine secured thereto which engages with a portion of the piston shaft which actuates the operation of each valve.

Abstract: To prevent dissolution of siliceous grains or siliceous bonds between grains in or around a well when aqueous fluid is passed through the well in an oil recovery process, the siliceous solids are at least once treated with a solution of Co ions in a solvent such as water.

Abstract: An apparatus for chemical treatment of a fluid pumped from a well through a production tubing includes a tubing anchor with slips adapted to be set hydraulically and mechanically against the casing in the well without rotating the production tubing. A branch line from a chemical injection line communicates with a setting pressure chamber in the anchor which, when pressurized, is used to initially set the slips. Thereafter, a straight pull on the tubing mechanically completes setting of the slips and a plug blocking the injection line is removed enabling the delivery of a treatment chemical to the well fluid upstream of a pump utilized in removing the fluid in the well.

Abstract: A fully programmable system for controlling the operation of one or more gas or oil production wells by controlling the intermittent operation of the wells in response to either programmed information or monitored and measured criteria related to the wells themselves. The system includes battery powered solid state circuitry comprising a keyboard, a programmable memory, a microprocessor, control circuitry, means for inputting measured parameters from a plurality of transducers and a liquid crystal display system for displaying information contained within the memory, or one of the measured parameters. In one embodiment, the system monitors pressure, flow, and other parameters of a plurality of wells drawing petroleum products from a common reservoir to control the intermittent operation of either gas injection to the well, outflow of fluids from the well, or shutting in of the well to maximize the overall output of the entire array of wells drawing from the common reservoir.

Abstract: A derailleur for a bicycle is provided with a base member, a movable member movable axially of a multistage sprocket assembly, a linkage member for moving the movable member axially of the multistage sprocket assembly, a guide mechanism supported to the movable member and guiding a driving chain from one sprocket to another at the multistage sprocket assembly, and a coiled return spring. At an intermediate portion of the linkage member there is a provided a support shaft for the spring, with the support shaft supporting the coiled portion of the spring. A first end portion of the spring is retained to the linkage member carrying the support shaft, and a second end portion of the spring is movably engaged with a member movable relative to the linkage member, thereby reducing the amount of deflection of the spring for a given amount of movement of the movable member.

Abstract: An apparatus and methods for removing sand and debris from a well bore utilizes an elongated string which includes a pump functioning to pump debris into the string interior from the lower end of the well bore. The pump includes a stationary hollow piston with a hollow piston rod which is connected to the lower portion of the string, and a cylinder which is connected to the upper portion of the string. The cylinder is keyed to the piston rod to transmit rotary motion from the upper portion of the string via the pump to a lower portion of the string in which the debris is trapped. Check valves are provided below and above the pump in the string to prevent retrograde flow of liquid downwardly in the string. By reciprocating the upper portion of the string, debris is pumped into the lower portion of the string, along with well liquids. The liquid pumped into the string from the well continues upwardly in the string, passing through the interior of the piston rod and piston and into the pump cylinder.

Abstract: Disclosed is a bellows control valve with means to pressurize the bellows chamber to very high pressure without creating a significant detrimental differential pressure across the bellows.

Abstract: In a heavy oil reservoir containing water-sensitive clay which impedes injections of either steam or cold CO.sub.2, oil is produced by injecting CO.sub.2 vapor at more than about 130.degree. F. at a pressure below the critical pressure for the CO.sub.2 or fracturing pressure for the reservoir.

Abstract: In injecting an aqueous alkaline liquid to displace an acidic oil within a subterranean reservoir, damage due to dissolving silica in or around a well is avoided by providing the alkaline solution with an amount of soluble silicate particularly suited for the reservoir conditions.