Patent ID: 6514408
Filing Date: 2003-02-04
Classification: B01D,E21B

Abstract:
A particle control screen assembly for a perforated pipe used in a well, comprising:a cylindrical weld-compatible metal particulate control screen generally coaxial about an axis and having pores sized to prevent passage of certain particulate material, wherein the particulate control screen is a multi-layer woven and sintered together stainless steel mesh; a cylindrical weld-compatible metal structure generally coaxial about the axis adjacent to a cylindrical edge of the metal particulate control screen; an imperforate annular sealing strip of a weld-compatible metal arranged along the cylindrical edge of the metal particulate control screen; and an annular metal weld between the metal particulate control screen and the metal structure with the metal weld bonding to a portion of the metal structure, a portion of the metal particulate control screen and a portion of the annular sealing strip, such that no leakage gaps larger than the size of the pores are formed.