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| Number | Title | Issue Date |
| 7249631 | Slip on screen with expanded base pipe A method for manufacturing a wellscreen and a wellscreen that have the mechanical properties of a direct-wrap wellscreen and the precise slot tolerance of a slip-on wellscreen are provided. In one embodiment, a method for manufacturing a wellscreen for use in a well... | 07/31/2007 |
| 7111770 | Method for producing connecting ends on metal tubes and tube piece comprising such connecting ends Connecting ends on a hose piece comprising several metal layers, in particular a strip wound metal hose piece, are produced by fixing the overlapping metal layers of a hose of larger length or of an endless hose in the region of the point of separation through weldi... | 09/26/2006 |
| 6960274 | Tooling and method of manufacturing a mesh laminate An apparatus and method of manufacturing a wire mesh laminate includes wrapping a central core with multiple layers of mesh screen and a barrier layer having a higher melting point than the mesh screen to form a spool assembly. The spool assembly is then surrounded ... | 11/01/2005 |
| 6941652 | Methods of fabricating a thin-wall expandable well screen assembly An expandable well screen has a desirable thin-wall construction together with a simplified fabrication method. In fabricating the screen, a flexible sheet of metal mesh filter media is diffusion bonded to an inner side of a perforated metal sheet which is then defo... | 09/13/2005 |
| 6808103 | Method for continuous high-speed welding of double-ply metal tubes and welding furnace for performing the same The present invention is a method and apparatus for making a double-ply metal tube such as those used for automobile brake tubes by producing the tube continuously in a single process. The present invention is characterized by using a high-temperature reducing molte... | 10/26/2004 |
| 6612481 | Wellscreen An apparatus and method of manufacturing a wellscreen for subterranean use in oil, gas, and water wells, incorporating numerous automated processes, whereby layers of mesh are continuously sintered to a perforated strip, formed into a tube, placed over a ... | 09/02/2003 |
| 5920032 | Continuous power/signal conductor and cover for downhole use Conductors are placed in insulator which acts as a spacer/centralizer for the conductors, which are in turn mounted within tubing. The void spaces between the insulator and the tubing inside wall can be filled with a sealing material. Alternatively, the v... | 07/06/1999 |
| 5845837 | Polymer-based material for carbon deposition during brazing operations A polymeric-based material for use in brazing operations to prevent agglomeration and run-off of brazing material on exterior exposed surfaces of the workpiece containing an extrudable melt-processible thermoplastic material selected from the group consis... | 12/08/1998 |
| 5297587 | Sealed double wall steel tubing having steel outer surface A non-corrosive double-wall tubing in which an unbrazed, unsealed continuous double-wall tube of a given circumference is formed from a metal sheet composed of a first non-ferritic metal having a first defined region of exposed non-ferritic metal and a se... | 03/29/1994 |
| 5222652 | Non-corrosive double walled tube and process for making the same A seamless double-walled tube having high corrosion resistance and relative flexibility prepared by a process for brazing non-ferritic steel surfaces such as nickel chromium or stainless steel to which a suitable brazing alloy such as copper has been mech... | 06/29/1993 |
| 5163602 | Multi-walled steel pipe, a method of making the same and a metal strip for use in making the same A multi-walled steel pipe comprises a metal strip plated with copper and including a brazing layer thereon. At least one surface of the metal strip is roughened and braze welded to the other, overlapping surface when the metal strip is rolled. The roughen... | 11/17/1992 |
| 5145103 | Partial elimination of copper plate from steel strip by mechanical means A process for producing non-corrosive double-wall tubing in which an unbrazed, unsealed continuous double-wall tube of a given circumference is formed from a metal sheet composed of a first non-ferritic metal having a first defined region of exposed non-f... | 09/08/1992 |
| 4711387 | Method of producing pipes with crack arresters Disclosed is a method of producing crack arrester consisting in that a hollow cylindrical blank (1) with a multi-layer wall and a discontinuity (2) provided at least in one of the layers is made so that the diameter and wall thickness thereof are smaller ... | 12/08/1987 |
| 4353494 | Process and apparatus for the manufacture of annular work pieces for subsequent conversion into finished products Metal annuli formed of chill cast metal for subsequent conversion into finished products are produced between at least one pair of inner and outer rollers forming between them a roll-pass, the outer one of which is driven and the inner one, of less diamet... | 10/12/1982 |
| 4095594 | Method of manufacturing laminated shells A method of manufacturing laminated shells for high pressure vessels and es comprising wrapping a metal sheet into a coil, welding the sheet end edges adjoining coil layers and joining adjacent layers by welding, wherein, with a view to increasing the pr... | 06/20/1978 |
