Dual function cleaning tool
AssigneeSpecialised Petroleum Services Group Limited
InventorGeorge Telfer
Life of this patent
Estimating the term…
Abstract
A cleaning tool for cleaning a liner top in a well bore. The tool includes cleaning elements, typically scrapers, which are arranged eccentrically to an axial bore through the tool. The elements are biased outwardly to contact an inner surface of a polished bore receptacle (PBR) at a position with a curvature to match the PBR and to present leading edges of each element when positioned at a surface of a neighbouring casing. The tool may further provide a top dress mill and act as a packer actuator sub. This provides a tool which performs a number of functions on a single trip in a well bore.
Claims13
A cleaning tool for use on a work string, the tool comprising:
- a cylindrical body having an axial bore running therethrough;
- a plurality of eccentrically located cleaning elements mounted thereon, wherein each of the plurality of cleaning elements comprises a curved outer face that extends from a leading edge to a trailing edge of the cleaning element;
- and
- positioning means to move the cleaning elements in relation to the cylindrical body from a first position to a second position, wherein in the first position, the outer faces of the cleaning elements define a cylindrical surface centralized to the axial bore so that the cleaning elements are configured to provide a polishing action, and in the second position, the leading edges of the cleaning elements is configured to provide a scraping action.
Dependencies are inferred from the claim text.