Method and apparatus for anchoring a well screen on a perforated mandrel of stainless steel
AssigneeHouston Well Screen Company
InventorLawrence J. Graen
Life of this patent
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Abstract
A method and apparatus is described for anchoring a well screen on a stainless steel perforated mandrel without the use of welds in which cup-shaped members, each having a base and an annular wall, are positioned on the mandrel at each end of the screen with the walls of the cups extending partly over the screen and filling the annular cavities between the walls of the cups and the ends of the screen with a liquid adhesive epoxy to anchor the cups to the mandrel.
Claims7
A well screen assembly comprising a perforated mandrel of stainless steel, a first screen mounted on the mandrel, two cup shaped members, each having a base and an annular wall, positioned on the mandrel at opposite ends of the screen with a portion of the annular wall of each cup extending over the ends of the screen to provide annular cavities between the mandrel and the annular wall of the cup that extend from the end of the screen to the base of the cups, openings extending through the walls of the cups into the annular cavities, seal rings in the cavities on opposite sides of the openings and, a body of adhesive epoxy filling the cavity of each cup to attach the cups to the mandrel and hold the screen from longitudinal movement relative to the mandrel.
A method of anchoring a well screen on a perforated tubular mandrel to hold the well screen from longitudinal movement relative to the mandrel comprising the steps of positioning the well screen on the mandrel, locating cup-shaped members having a base and a cylindrical wall on the mandrel at opposite ends of the screen with the walls of the cup-shaped members extending partly over the ends of the screen to provide annular cavities between the walls of the cups and the mandrel, filling the annular space with liquid epoxy, and heating the epoxy the required amount to cure the epoxy and cause the epoxy to adhere to the walls of the cups and the mandrel to hold the cups and the screen from longitudinal movement relative to the mandrel.
Dependencies are inferred from the claim text.