Patent ID: 6250638
Filing Date: 2001-06-26
Classification: E21B

Abstract:
Tapered joint sealing means for removably sealing a lower end of an annular space between an inner tubing and an outer tubing in which the lower end of the space is deep below a well surface in a well bore, and the inner and outer tubings extend continuously from the lower end of the space to the well surface, the sealing means comprising:a monolithic female tubular element sealably connected to the outer tubing and having an inner cylindrical wall and an outer cylindrical wall joined by an upper planar end and a lower planar end;the inner cylindrical wall having a tapered smooth metal sealing portion extending downwardly and inwardly;a monolithic male tubular element having an inner cylindrical wall and an outer cylindrical wall joined by an upper planar face and a lower planar face, the outer cylindrical wall having a tapered smooth metal sealing portion extending downwardly and inwardly And constructed for mating in fluid tight flush sealing engagement with the sealing portion of the female element by translatory motion;the inner tubing being welded to the upper planar face and extending upward therefrom to the surface so that it may be lifted with the male element up to the surface for repair when leakage into or out of the annular space has been detected.