Apparatus and methods of milling a restricted casing shoe
AssigneeWeatherford/Lamb, Inc.
InventorsBill Rhinehart, Thomas M. Redlinger, Thurman B. Carter, Wei Xu, Hubert E. Halford, Martin Stulberg
Life of this patent
Estimating the term…
Abstract
A method of removing a restriction in a tubular located in a well includes providing a drilling assembly with a drill bit and a reamer, the reamer having a cutting structure for removing the restriction; drilling through a lower portion of the tubular; expanding the reamer at a location below the restriction; and urging the reamer back toward the restriction to remove the restriction.
Claims28
A method of removing a restriction in a tubular located in a well, comprising:
- providing a drilling assembly with a drill bit and a reamer, the reamer having a cutting structure for removing the restriction;
- drilling through a lower portion of the tubular;
- expanding the reamer at a location below the restriction;
- and
- urging the reamer back toward the restriction to remove the restriction.
An apparatus for removing a restriction in a tubular located in a well, comprising:
- a drilling assembly having a drill bit and a reamer, wherein the reamer includes a cutting arm pivotable between an unexpanded position and an expanded position, wherein the cutting arm includes a drilling zone adapted to extend a length of the well and a milling zone adapted to expand a width of the well;
- an actuating device for moving the cutting arm to the expanded position;
- and
- a retracting mechanism having a sleeve engageable with the cutting arm to return the cutting arm to the unexpanded position, wherein the sleeve is movable relative to the actuating device.
An apparatus for removing a restriction in a tubular located in a well, comprising:
- a drilling assembly having a drill bit and a reamer, wherein the reamer includes a cutting arm pivotable between an unexpanded position and an expanded position, wherein the cutting arm includes a drilling zone adapted to extend a length of the well and a milling zone adapted to expand a width of the well;
- and
- a retracting mechanism having a sleeve engageable with the cutting arm to return the cutting arm to the unexpanded position, and a biasing member in an expanded position when the cutting arm is extended.
An apparatus for removing a restriction in a tubular located in a well, comprising:
- a drilling assembly having a drill bit and a reamer, wherein the reamer includes a cutting arm pivotable between an unexpanded position and an expanded position, wherein the cutting arm includes a drilling zone adapted to extend a length of the well and a milling zone adapted to expand a width of the well;
- an actuating device for moving the cutting arm to the expanded position;
- and
- a retracting mechanism includes a sleeve engageable with the cutting arm to return the cutting arm to the unexpanded position and a biasing member in an extended position when the cutting arm is expanded.
Dependencies are inferred from the claim text.