Patent ID: 6044904
Filing Date: 2000-04-04
Classification: B09B,E21B

Abstract:
A wellhead assembly for engaging a protruding wellhead pipe, said protruding wellhead pipe having a diameter, comprising:a first substantially hollow cylindrical member having a first open end, a second closed end, an outer wall, an inner wall, a receiving cavity therein, said closed end having a first aperture therethrough, said first aperture having a diameter smaller than said diameter of said protruding wellhead pipe, said first substantially hollow cylindrical member being capable of slidably and removably receiving said protruding wellhead pipe within said receiving cavity;a second substantially hollow cylindrical member having a first open end, a second closed end, and an interior cavity, said first open end being coupled to said closed end of said first substantially hollow cylindrical member and being positioned so as to surround and enclose said first aperture, said second substantially hollow cylindrical member further including a second aperture therethrough, wherein when said first substantially hollow cylindrical member slidably receives said protruding wellhead pipe, a fluid passageway is formed from said wellhead pipe, through said receiving cavity and said aperture of said first substantially hollow cylindrical member, and through said interior cavity and said second aperture of said second substantially hollow cylindrical member;wherein said inner wall of said first substantially hollow cylindrical member includes a pair of substantially annular recesses formed therein; anda pair of annular gasket rings extending circumferentially around and communicating with an inner wall of said first substantially hollow cylindrical member, said pair of annual gasket rings each positioned partially within and protruding from said pair of substantially annual recesses, said pair of annular gasket rings extending circumferentially around and communicating with said protruding wellhead pipe and forming a fluid seal between said protruding wellhead pipe and said first substantially hollow cylindrical member, when said protruding wellhead pipe is slidably received within said receiving cavity.