Stabilizer
AssigneeSmith International, Inc.
InventorJackson M. Kellner
Life of this patent
Estimating the term…
Abstract
The eccentric journals of a tandem roller stabilizer are azimuthally positioned relative to each other by the heads of end plate assembly bolts of each roller assembly extending into sockets in the end plates of the adjacent roller assembly.
Claims10
Wall contacting tool comprising a mandrel having a plurality of eccentric roller assemblies disposed in tandem along the length of the mandrel, each of the assemblies being provided with orientation means independent of the mandrel to prevent the assemblies from being positioned in full axial engagement except when in any one of a predetermined limited number of fixed relative azimuthal orientations of the common eccentric diameters.
Wall contacting tool comprising
- a tubular body including a mandrel having at one end a threaded pin adapted to receive a releasable box and having a threaded box at the other end forming a shoulder with the mandrel, and
- a plurality of roller assemblies releaseably mounted on said mandrel, being axially slidable relative to the mandrel when said releasable box is removed, said mandrel having a smooth 360.degree. cylindrical outer periphery, each roller assembly comprising:
- a journal in the form of a sleeve having a smooth 360.degree. cylindrical inner periphery adapted to fit slidably on said mandrel and having an outer periphery eccentric to said inner periphery,
- a roller rotatably mounted on the journal, and
- end plates secured by bolts to each end of the journal retaining the roller against axial displacement relative to the journal,
- the adjacent end plates of each adjacent pair of rollers being azimuthally oriented by the heads of the bolts in one plate entering countersink bores for the heads of the bolts in the adjacent end plate.
Dependencies are inferred from the claim text.