The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 04, 2006
Filed:
Mar. 28, 2002
Per G. Angman, Calgary, CA;
John Hughes, Calgary, CA;
Per G. Angman, Calgary, CA;
John Hughes, Calgary, CA;
Tesco Corporation, Calgary, CA;
Abstract
An axial force generating tool for applying a force on a structure positioned within a borehole is taught. The tool includes a housing () sized to fit within the borehole in which the tool is required to act; an outer seal () disposed about the housing and selected to create a seal between the housing and the borehole; an inner bore () through the housing including a seal to prevent flow from the inner bore out through the lower end; an opening () to the inner bore above the seal; a bracing means () for maintaining the housing against axial movement in the borehole once the housing is in a selected position within the borehole; a piston () mounted in sliding engagement wiht the housing for axial movement relative to the housing, the piston positioned to act between a pressure differential establishable between the inner bore and the borehole between the seal and the lower end to drive the piston axially relative to the housing; and a grapple connected to the piston for axial movement therewith.