Slide reamer and stabilizer tool

摘要

A downhole tool, for selectively reaming a wellbore or stabilizing drill string components within a wellbore, includes an elongate tool body adapted to receive reamer cartridges or stabilizer cartridges depending on the function desired. The reamer cartridges are radially insertable into corresponding pockets in the tool body, with each reamer cartridge having a reamer insert with an array of cutting elements. The reamer insert is disposed within a bushing and is rotatable relative thereto, about a rotational axis transverse to the longitudinal axis of the tool. However, the rotational axis is offset from the tool body axis, resulting in eccentric contact of the cutting elements with the wall of the wellbore, which in turn imparts rotation to the reamer insert when the tool is being moved axially through a wellbore without rotation. When the tool is to be used for stabilization, the reamer cartridges can be removed and replaced with stabilizer cartridges having stabilizer inserts with hard-faced stabilizer cones.

主权项

1. A downhole tool comprising a main body having:
(a) a longitudinal axis; (b) an outer surface; and (c) a plurality of channels formed into said outer surface, said channels dividing the main body into a plurality of blade sections corresponding in number to the number of channels; wherein each of at least two of the blade sections has one or more cartridge pockets formed into the outer surface thereof, each cartridge pocket being configured to receive a tool cartridge having a cylindrical inner surface for housing a tool insert having a cylindrical side surface portion complementary to the cylindrical inner surface, the cylindrical side surface portion having a centroidal axis, such that the tool insert is confined to rotate, by the cylindrical inner surface, about a rotational axis transverse to, and offset from, the longitudinal axis of the main body, the rotational axis being coincident with the centroidal axis of the cylindrical side surface portion of the tool insert.