Retrievable screen device for drill pipe and the like
AssigneeBaker Oil Tools, Inc.
InventorHerbert W. Beimgraben
Life of this patent
Estimating the term…
Abstract
A mud screen for installation between any two selected ends of interconnected pipes, such as a drill pipe string, comprises a supporting collar anchored in the selected threaded connection of the drill pipe string and a screen support mounted on such collar and secured thereto by one or more releasing devices. An apertured inverted conical screen is supported by the screen support in transverse relationship to the pipe bore. A bridging element is secured across the screen support and defines a mounting for an upstanding post which functions as a manual handle and also defines a fishing neck at its upper end for downhole retrieval.
Claims7
A retrievable screen for a well conduit defined by selectively connectable lengths of tubular members, comprising:
- a collar element constructed and arranged for mounting between any two of the selectively connectable ends of the tubular members;
- a screen element inserted in said collar and supported thereby in transverse relationship to the well conduit bore, said screen element having restricted apertures therethrough permitting flow of fluids but trapping all particles sized greater than said apertures;
- releasing means connecting said screen element to said collar, whereby the application of an applied axial force to said screen element effects the activation of said releasing means and the removal of said filter element;
- handle means rigidly secured to said screen element, said handle means terminating in a fishing neck, thereby permitting manual insertion of said screen element in the well conduit and downhole retrieval of said screen element by an overshot fishing tool.
Dependencies are inferred from the claim text.