Abstract: An apparatus, system and method for pumping gaseous fluid are described. The gas separator of the invention homogenizes at least a portion of produced well fluid and vents unhomogenized gas, improving the efficiency and decreasing the downtime of the assembly. A system for pumping gaseous fluid from an underground well includes a gas separator, the gas separator including an impeller configured to homogenize at least a portion of a gas and a liquid in a pumped fluid to obtain homogenized fluid, the impeller including a top side open to the diffuser and a truncated vane located at a mid-pitch location between at least two untruncated vanes starting from a bottom side of the impeller, and a gas separation chamber downstream of the impeller, the gas separation chamber configured to vent an unhomogenized gas, and a centrifugal pump arranged to receive the homogenized fluid from the gas separation chamber.

Abstract: A thrust bearing surface for a floater-style centrifugal pump is described. A thrust bearing system includes a rotatable member including a sleeve, and a flange extending radially on a downstream side of the sleeve, a swirling member on a top of the flange, the swirling member extending axially towards an impeller bottom, wherein as the swirling member rotates, the swirling member guides working fluid in an outwards and upwards direction from the swirling member. A rotating member of a thrust bearing surface includes a sleeve securable to a rotatable shaft of a stage, a flange extending radially around a top of the sleeve, and at least one swirling member extending axially downstream from a top of the flange towards a bottom of an impeller, wherein each of the at least one swirling member extends from an outer diameter towards an inner diameter of the flange.

Abstract: A thrust bearing surface for a floater-style centrifugal pump is described. A thrust bearing system includes a rotatable member including a sleeve, and a flange extending radially on a downstream side of the sleeve, a swirling member on a top of the flange, the swirling member extending axially towards an impeller bottom, wherein as the swirling member rotates, the swirling member guides working fluid in an outwards and upwards direction from the swirling member. A rotating member of a thrust bearing surface includes a sleeve securable to a rotatable shaft of a stage, a flange extending radially around a top of the sleeve, and at least one swirling member extending axially downstream from a top of the flange towards a bottom of an impeller, wherein each of the at least one swirling member extends from an outer diameter towards an inner diameter of the flange.

Abstract: Enhanced abrasion resistance in well fluid wetted assemblies is described. The bearing set of the invention provides an enhanced abrasion resistance that is better capable of withstanding friction from solids in electric submersible pump (ESP) well production applications. The flutes, grooves, sectors and intersections of the invention provide improved fluid and solid flow through assembly components, which improves cooling while the assembly is in operation and reduces body wear, thereby increasing the lifespan of the ESP system.

Abstract: Enhanced abrasion resistance in well fluid wetted assemblies is described. The bearing set of the invention provides an enhanced abrasion resistance that is better capable of withstanding friction from solids in electric submersible pump (ESP) well production applications. The flutes, grooves, sectors and intersections of the invention provide improved fluid and solid flow through assembly components, which improves cooling while the assembly is in operation and reduces body wear, thereby increasing the lifespan of the ESP system.

Abstract: An apparatus, system and method for pumping gaseous fluid are described. The gas separator of the invention homogenizes at least a portion of produced well fluid and vents unhomogenized gas thereby improving the efficiency and decreasing the downtime of the assembly. A system for pumping gaseous fluid from an underground well comprises a gas separator, the gas separator comprising an impeller configured to homogenize at least a portion of a gas and a liquid in a pumped fluid to obtain homogenized fluid, the impeller comprising a top side open to the diffuser and a truncated vane located at a mid-pitch location between at least two untruncated vanes starting from a bottom side of the impeller, and a gas separation chamber downstream of the impeller, the gas separation chamber configured to vent an unhomogenized gas, and a centrifugal pump arranged to receive the homogenized fluid from the gas separation chamber.

Abstract: Enhanced abrasion resistance in well fluid wetted assemblies is described. The bearing set of the invention provides an enhanced abrasion resistance that is better capable of withstanding friction from solids in electric submersible pump (ESP) well production applications. The flutes, grooves, sectors and intersections of the invention provide improved fluid and solid flow through assembly components, which improves cooling while the assembly is in operation and reduces body wear, thereby increasing the lifespan of the ESP system.

Abstract: A method for detecting and correcting cross-linked files while accessing data on a storage media. Each file includes control file information that defines a plurality of blocks on storage media allocated to the file. When a program identifies a volume of storage media that may include cross-linked files, the program intercepts requests to access a file on the storage device. The program then reads the control information for the file and identifies the blocks allocated to the file. The program compares the allocation to a free space map, identifying allocated and unallocated blocks on the storage media, and corrects any inconsistency between the free space map and the control information. The program also maintains a secondary map, which identifies the blocks on the storage media allocated to the files that have been previously been examined.

Abstract: A method for deriving a functional circuit description that is independent of pre-charge node values, the functional circuit description IS a transformation of an initial structural circuit description having pre-chargeable nodes. The method includes identifying the pre-chargeable nodes in initial structural circuit description. The pre-chargeable nodes have a logic value that is dependent upon an associated pre-charge clock. Pre-charge nodes value associated with the pre-chargeable nodes are then determined and then the functional circuit description that is independent of pre-charge node values is derived.

Abstract: A method for detecting and correcting cross-linked files while accessing data on a storage media. Each file includes control file information that defines a plurality of blocks on storage media allocated to the file. When a program identifies a volume of storage media that may include cross-linked files, the program intercepts requests to access a file on the storage device. The program then reads the control information for the file and identifies the blocks allocated to the file. The program compares the allocation to a free space map, identifying allocated and unallocated blocks on the storage media, and corrects any inconsistency between the free space map and the control information. The program also maintains a secondary map, which identifies the blocks on the storage media allocated to the files that have been previously been examined.

Abstract: A method for deriving a hierarchical functional description of a circuit by creating a hierarchical model of the circuit from the initial hardware description (100), the hierarchical model having at least one boundary connection coupling hierarchical levels of the model. Signal flow conflicts at each boundary connection are then analyszd (101) which includes flattening (205) instances of the hierarchical model where signal flow conflicts are identified thereby transforming the hierarchical model into a signal flow conflict free hierarchical model. A hierarchical functional description of the circuit is then derived (102) from the signal flow conflict free hierarchical model.

Abstract: A method for deriving a hierarchical functional description of a circuit by creating a hierarchical model of the circuit from the initial hardware description (100), the hierarchical model having at least one boundary connection coupling hierarchical levels of the model. Signal flow conflicts at each boundary connection are then analysed (101) which includes flattening (205) instances of the hierarchical model where signal flow conflicts are identified thereby transforming the hierarchical model into a signal flow conflict free hierarchical model. A hierarchical functional description of the circuit is then derived (102) from the signal flow conflict free hierarchical model.

Abstract: A gun sight for a weapon such as a hand gun, rifle, shotgun, submachine gun, crossbow or the like. The sight is a unitary member in the case of a gun mounted on the top of the barrel thereof and having a top surface which is the form of either an elongated ellipse in one embodiment or an isosceles trapezoid in the case of another embodiment. The base portion of the sight is attached to the weapon, the top surface forming a ramp which rises linearly from its rear end towards the muzzle end thereof. The raise of the ramp is equal to the minor axis of the ellipse in the case of the elliptical embodiment and to that of the longer of the two short sides of the trapezoid in the case of the trapezoidal embodiment. The top surface of the sight is made of a color to contrast with the intended target or may be made of a luminescent material or an internally illuminated translucent material so that it is clearly visible in dim light.

Abstract: A pair of mirrors are mounted upon a support frame in front of a cathode ray viewing screen so as to double reflect the images on the screen so that they can be viewed looking downwardly rather than directly at the screen. A support member is provided for the mirrors which enables individual relative adjustment of such mirrors both towards and away from the screen as well as vertically and angularly relative to the screen. This end result is achieved by means of adjustable support rods which fit through elongated slots formed in the support frame as well as elongated slots formed in the mounts for the mirrors. In one embodiment the viewer assembly is supported on top of the CRT assembly with a balancing counterweight being employed to counterbalance the weight of the mirrors and their associated support members. In another embodiment a stand is provided for supporting the viewing aid in front of the screen.

Abstract: A gun sight for a weapon such as a hand gun, rifle, shot gun, submachine gun, etc. The sight is a unitary member mounted on the top of the barrel of the weapon having a top surface in the form of an elongated isosceles triangle, the apex of which is towards the muzzle of the weapon. The base portion of the sight is attached to the weapon, the top surface forming a ramp which rises linearly from its rear end towards the apex of the triangle which is towards the muzzle end. The top surface of the sight is usually made white or some other light color, and can be of a luminescent material so that it is clearly visible in dim light, or the sight may be made of a transparent or translucent material such as a suitable plastic with a small battery operated lamp mounted therein.