Improved no-turn tool

Details Improved no-turn tool Improved no-turn tool

E - Fixed Constructions

21

B

E21B 23/00 (2006.01) E21B 23/01 (2006.01)

Patent

CA 2231614

A no-turn tool for use in a well string which provides high radial extension of the slips. Such a no-turn tool comprises a mandrel with surrounding housing, and slips mounted for tangential motion in relation to the mandrel through slip apertures spaced circumferentially around the housing. A slip drive on the mandrel operatively connected to the slips, preferably by use of a pinion gear meshed with teeth on the slips, drives the slips, preferably by rotation of the mandrel, along respective tangents to the mandrel through the respective slip apertures of the housing. Drag blocks, preferably self-centering, are mounted in drag block apertures in the housing and are urged outward of the housing by springs. The drag blocks are preferably mounted parallel to the slips for independent motion in relation to the slips. A method of securing a downhole tool in a well, in which the method comprising the steps of providing a no-turn tool on a well string, the no-turn having slips mounted in a housing for tangential motion in relation to a mandrel mounted within the housing and driving the slips tangentially outward in relation to the mandrel until the slips engage a fixed surface.

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