Abstract: The present invention relates to a method and system for hydrating a gel for treating a wellbore penetrating a subterranean formation. The method includes directing a base fluid through an inlet into a mixer having an inner chamber housing a plurality of impellers extending radially from and rotating about a hub, causing a centrifugal motion of the base fluid, feeding a quantity of gel into the mixer, mixing the gel with the base fluid and discharging the now-hydrated gel from the inner chamber through an outlet of the mixer. A prewetting device may also be used. Thereafter, a variety of additives may be added to the gel fluid mix to form a fluid treatment to be introduced into a subterranean formation.

Abstract: The present invention discloses two stage subterranean zone fracturing fluids and methods. A two stage subterranean zone fracturing fluid of the invention comprises a first stage fluid comprising a foamed liquid containing a water soluble gel breaker and a second stage fluid that comprises a viscous liquid containing a metal cross-linked gelling agent. Another two stage subterranean zone fracturing fluid comprises a first stage fluid comprising a foamed liquid containing a water soluble gel breaker and a second stage fluid comprising a viscous liquid containing a borate cross-linked gelling agent.

Abstract: The present invention provides fluid compositions comprising water and a formate ester, and methods of using these fluids in subterranean formations. Optionally, other additives may be added.

Abstract: Methods of treating subterranean zones using gelled aqueous treating fluids containing environmentally benign sequestering agents are provided. The methods basically comprise the steps of preparing or providing a treating fluid comprising water containing divalent metal ions, a gelling agent, a borate crosslinking agent and an environmentally benign sequestering agent, and then introducing the treating fluid into the subterranean zone.

Abstract: The present invention provides a well treatment fluid for use in a well, the well treatment fluid comprising water; an amine-based polymer; an polysaccharide-based polymer; and an oxidizing agent that is capable of at least partially oxidizing at least the polysaccharide-based polymer. The present invention also provides a method of treating a subterranean formation penetrated by a wellbore, the method comprising the steps of: (a) forming a well treatment fluid comprising water; an amine-based polymer; a polysaccharide-based polymer; and an oxidizing agent that is capable of at least partially oxidizing at least a portion of the polysaccharide-based polymer; and (b) contacting the well treatment fluid with the subterranean formation.

Abstract: A method and apparatus for detecting the occurrence of surge or incipient surge in a centrifugal compressor is supplied. The centrifugal compressor has an inlet passage, an inlet passage wall and an impeller. When flowing a fluid through the centrifugal compressor thereby establishing a fluid flow in the inlet passage, the fluid flow is measured in the inlet passage proximate the inlet passage wall and proximate the impeller. The measurements may include detecting a reverse in the fluid flow direction, measuring a tangential component to the fluid flow, measuring a substantial decrease in the axial fluid flow, and/or measuring the fluid temperature. Fluid flow in the compressor can then be modified or controlled to prevent surge.

Abstract: The invention provides a diverter assembly for transferring moving articles from one conveying surface to another conveying surface, comprising: a) a frame; b) at least one endless belt suspended between spaced apart pulleys supported on the frame, wherein the endless belt defines an unsupported belt span for contacting articles on the one conveying surface and transferring the contacted article to the another conveying surface; and c) an actuator operably connected to the frame to move the unsupported belt span in a position to contact the article moving on the one conveying surface to transfer the article to the another conveying surface.

Abstract: A storage device for disc media is provided. The storage device includes at least a case for storing the disc media. The case generally includes a plurality of case walls defining a box-like shape, a cavity defined inside the case walls that is sufficient to accommodate the disc media, and an opening defined in a side of the case (which is arbitrarily referred to as the front side of the case), the opening being at least sufficient for inserting the disc media into the cavity. According to a first aspect of the invention, the storage device includes a tray for optionally storing printed media associated with the case and a structure for retaining the tray on the case. According to a second aspect of the invention, the storage device includes a structure for selectively controlling the release of the disc media from the case. These two aspects of the invention can be practiced independently, but most preferably and advantageously are practiced together.

Abstract: A roof transition assembly for a roof deck having a corrugated sheet and a rigid sheet wherein a base component is positioned at the perimeter of the roof deck and has two legs. The first leg secures the base component to the corrugated sheet, and the second leg extends from the first leg, generally parallel to a free edge of the roof deck. The second leg includes an anchoring surface. An upper component positioned at the perimeter of the roof deck has a connector portion and an anchor portion. The anchor portion is secured to the roof deck, and the connector portion extends from the anchor portion and overlays and is secured to the anchoring surface of the base component, thus anchoring the base component and upper component to the roof deck.

Abstract: A method and apparatus for forming a tamper resistant seal on a plastic bag containing a loaf of bread or other products is disclosed. The neck of the bag is flattened, gripped between a pair of lower inboard and out board gathering belts adjacent opposite sides of a segment of the neck of the bag. A row of perforations is formed in the bag neck as the bag moves adjacent a roller provided with teeth or cutting elements. Heated air jets are directed to engage the segment of the bag bridging between the inboard and the outboard of the bag bridging between the inboard and the strip from the bag.

Abstract: A truss assembly apparatus and a method for assembling a truss utilizing the apparatus, the apparatus comprising a truss table having a work surface divided into a first and second assembly zone. The apparatus further includes first and second clamping assemblies for clamping the truss in the first and second assembly zones. The apparatus includes a flip-over assembly having a flip-over arm movable relative to the truss table for moving the truss from a first truss position in the first assembly zone, wherein a first truss face contacts the work surface, to a second truss position in the second assembly zone, wherein a second truss face contacts the work surface. The flip-over arm is movable between a home position adjacent said work surface and an extended position, wherein the flip-over arm may be perpendicular to the work surface. In another alternative, at least a portion of the flip-over arm may extend over the second assembly zone when the flip-over arm is in the extended position.

Abstract: A method and apparatus for forming a tamper resistant seal on a plastic bag containing a loaf of bread or other products is disclosed. The neck of the bag is flattened, gripped between a pair of upper inboard and outboard gathering belts and a pair of lower inboard and outboard gathering belts adjacent opposite sides of a segment of the neck of the bag. A row of perforations is formed in the bag neck as the bag moves adjacent a roller provided with teeth or cutting elements. Heated air jets are directed to engage the segment of the bag bridging between the inboard and the outboard gathering belts for fusing panels of the bag together to form a sealed strip spaced from the row of perforations in the bag neck to facilitate removal of the sealed strip from the bag.

Abstract: A marker tool and method for use in duplicating a hole pattern from a primary structure into a work piece using a thin generally cylindrical main body member of elastomeric material having two ends, an adhesive coated flange terminating one of the two ends, and a marker element of a strong, hard material centrally embedded in the tool and extending between each of the two ends of the tool, the marker element being of such shape, strength and hardness as to provide an indentation in the work piece to which the tool has been adhered by the adhesive layer when the tool is struck by a hammer, for example.

Abstract: A line pair testing and fault diagnostic apparatus implementing three-terminal measurement techniques using a multiple frequency source waveform transmission to propagate a reflected waveform. The apparatus implements a microcomputer circuit executing a program. The program has frequency domain analysis algorithms to process the reflected waveform to provide a craftsperson with the electrical characteristic data of a line pair to inform the craftsperson the existence of a line pair fault and the location of the fault in the line pair. The apparatus implements relays for switching between several diagnostics circuits within the apparatus for providing the craftsperson with numerous methods and techniques for troubleshooting a line pair.

Abstract: A roof transition assembly for a roof deck having a corrugated sheet and a rigid sheet wherein a base component is positioned at the perimeter of the roof deck and has two legs. The first leg secures the base component to the corrugated sheet, and the second leg extends from the first leg, generally parallel to a free edge of the roof deck. The second leg includes an anchoring surface. An upper component positioned at the perimeter of the roof deck has a connector portion and an anchor portion. The anchor portion is secured to the roof deck, and the connector portion extends from the anchor portion and overlays and is secured to the anchoring surface of the base component, thus anchoring the base component and upper component to the roof deck.

Abstract: A portable air purifier system and apparatus which includes a multi-element filter pack that is replaceable as a single unit, thus facilitating health safety of maintenance personnel. By serially disposing filter elements in order of descending sizes of particulates, filtering is improved. Selectably includable within the filters are materials that are particularly efficacious in removing contaminants such as acetone, ammonia, ozone, carbon monoxide, carbon dioxide, ethanol, methane, ethane, methanol, formaldehyde, hydrogen sulfide and other hazardous substances. By including an ultra-violet light source directed onto an activated charcoal layer, germicidal action is facilitated, and noise is abated through the advantageous employment of an expanded plenum and multiple right angle bends in air passageways.

Abstract: The invention relates to processes of making a composition having a host compound capable of accepting one or more bio-affecting guest compounds, and compositions formed by the processes.

Abstract: In accordance with the principles and concepts of the invention, apparatus and methods for assembling pre-cut members into trusses and joists and splicing pre-cut members into truss chords are presented. According to the invention, a splicing apparatus for connecting chord members end-to-end comprises a table having a table surface for supporting abutting chord members, a gantry press mounted adjacent to the table surface and configured to move relative to the table surface, the gantry press having at least two press rollers, each press roller having a peripheral surface positioned a successively closer clearance distance to the table surface.