Abstract: A retrievable anchor assembly for use in well bores and the like includes a unitary mandrel arranged to be directly attached to the tubing, and at its lower end to additional tubing or to well apparatus such as a well pump. An upper expander is threaded onto the mandrel and a lower expander is attached to the mandrel by shear pins. A plurality of slips are disposed in curcumferentially spaced relationship about the mandrel and held in place thereon by a plurality of garter springs which extend through the slips. A cage encircles the upper and lower expanders and the slips and includes openings through which the slips project for engagement with the well bore wall. The cage also includes slots through which drag springs that are attached to the upper expander extend for engagement with the well bore wall whereby relative rotation can be accomplished between the mandrel and upper expander to move the slips between set and retracted positions.

Abstract: A reinforced belt assembly or construction which utilizes a reinforcing material comprised of a reinforcing member portion possessing a high Young's modulus discontinuous throughout the length of the reinforcing material and a carrier member portion extending the length of the reinforcing material. The carrier member portion facilitates transport and winding of the reinforcing material about a forming mandel during manufacture and facilitates cutting of the belt assembly from the cured reinforced sleeve material such that the high Young's modulus member does not emerge from the cut sidewalls of the belt assembly.

Abstract: A variable speed pulley mounted to a torque transmission shaft having an idler structure arranged to maintain the power transmission belt centered between the pulley sheaves when the sheaves are spaced apart sufficiently to permit the belt to ride on the idler as in a stopped or idling condition of the pulley system. A tension roller may be utilized in the system for urging the belt against the outer surface of the idler, which, in the illustrated embodiment, is crowned. Structure is provided for affording facilitated adjustable movement of the adjustable sheave on the shaft, and in one embodiment, provision is made for providing lubrication therebetween.

Abstract: A fitting for use downhole in a well for connecting a pair of well pumps one above the other to the bottom of a drop pipe or the like, so that each of the pumps may discharge well fluid into the drop pipe, comprises an elongate housing with an inlet at its bottom end for connection to the discharge of one of the pumps, an outlet at its upper end for connection to the drop pipe, an elongate pocket portion between the ends for receipt of the second pump, the pocket portion defining a bypass conduit for well fluid flowing from the first pump through the fitting to the outlet, and a further inlet for connecting the discharge of the second pump into the fitting at its upper end. The fitting is suitable for use in well casings down to a diameter of about six inches and the design of the fitting promotes smooth non-turbulent flow of well fluid therethrough.

Abstract: A drill bit assembly for a rotary drill having a source of fluid under pressure and three bearing mounted rotary cutting cones for drilling into relatively hard material comprises an elongated housing with a first end adapted for engagement with the drill and a second end including the cutting cones or tools for engagement with the material to be drilled. A plenum chamber is provided within the housing for receiving pressurized fluid and for dividing the pressurized fluid into three portions. A first portion of the pressurized fluid is directed downwardly for impringement upon the material being drilled to pick up and remove dust and cuttings from the vicinity of the cutting cones. A second flow of the pressurized fluid is directed upwardly to remove the dust and cutting cones from the drill hole. The third flow of fluid is directed through the cutting cone bearings to cool the bearings during the drilling operation.

Abstract: A hydraulic autotensioner of a sealed type is used to give tension to a belt or a chain. The hydraulic autotensioner includes a body member having a large diameter oil chamber, a plunger having a small diameter oil chamber and a small passage, a piston whose head extends outside the body member and a spring for biasing the plunger.

Abstract: A hydraulic connector apparatus includes a first cylindrical tubular member having a first hydraulic port disposed in a radially outer surface thereof, and a second cylindrical tubular member having a second hydraulic port disposed in a radially inner surface thereof. A first cylindrical sliding sleeve valve is disposed about said first tubular member and movable relative to said first tubular member between open and closed positions wherein said first port is open and closed, respectively. A second cylindrical sliding sleeve valve is disposed within said radially inner surface of said second cylindrical tubular member and movable relative to said second tubular member between open and closed positions wherein said second port is open and closed, respectively.

Abstract: A method of processing oil shale to recover liquid or gaseous products which comprises constructing longitudinally sloping trenches excavated in a mineral deposit which is relatively impermeable in relation to the crushed oil shale, placing the crushed shale into the sloping trenches and covering same with a compacted layer of clay or other relatively impermeable and essentially inorganic minerals and thereafter igniting the oil shale at the upper end of the trench. Air is introduced at points along the upper end of the trenches and as the retorting zone moves longitudinally downward in the sloping trenches the liquid and gaseous materials are withdrawn at points located at the lower end of the trenches.

Abstract: In the disclosed method of successively opening-out and treating formations, nozzles are firmly pressed against the casing walls in opposition to the selected area of forming a hydraulic fracture, each nozzle having a through passage of a diameter ensuring that at a constant specified flow rate of a fluid with an abrasive filler through the passage there will be built up a pressure sufficient for hydraulic fracturing of the formation. The abrasive-laden fluid is then pumped through the nozzles at the constant flow rate at a pressure sufficient for making a perforation in the casing wall, the pressure being not less than that required for hydraulic fracturing of the formation, until a perforation of a diameter substantially equal to that of the through passages of the nozzle is formed.

Abstract: A packer actuated vent assembly comprising a packer device settable by reciprocal movement of a mandrel, a valve actuator in the form of a barrel attached to the packer body, and a mandrel extension having a valve means thereon attached to the packer mandrel. The valve means is engaged by a stop member located on the barrel and is moved to the venting position when the packer mandrel is properly manipulated to seat the packer.

Abstract: This specification discloses a method of creating a horizontally disposed fracture in a subterranean formation that is penetrated by a wellbore. Two packers are set in the wellbore against the formation to be fractured to define with the wellbore and intermediate the packers a fracture treatment zone. Hydraulic pressure is applied to the fracture treatment zone in an amount slightly less than that required to create a vertical fracture in the formation. Acoustical energy is applied in the fracture treatment zone to form a resonant condition therein and to provide rigid coupling of acoustic stress pulses between the packer and the formation and form a horizontal fracture in the formation. The horizontal fracture is propagated into the formation by the continued application of the hydraulic pressure to the fracture treatment zone.