Cutting tool for use in a wellbore tubular
AssigneeWeatherford/Lamb, Inc.
InventorsKevin L. Gray, James D. Estes
Life of this patent
Estimating the term…
Abstract
An apparatus and method of determining the point at which a tubular is stuck within another tubular or a wellbore by applying a tensile or torsional force to the stuck tubular and measuring the response of various locations within the tubular. In addition, the apparatus may be combined with a cutting tool to separate the free portion of the tubular from the stuck portion.
Claims30
An apparatus for use in a tubular in a wellbore, comprising:
- an anchoring mechanism for coupling the apparatus to the tubular;
- a housing connectable to a wireline having a conductor;
- and
- a radial cutting torch comprising:
- a body having a surrounding wall defining an elongated chamber;
- at least one aperture formed through the surrounding wall;
- and
- at least one solid combustible charge disposed in the chamber, wherein combustion of the charge directs a flame through the aperture for cutting the tubular.
An apparatus for use in a tubular in a wellbore, comprising:
- an anchoring mechanism for coupling the apparatus to the tubular, the anchor mechanism comprising an arm that is outwardly biased by a spring;
- a housing connectable to a wireline having a conductor;
- and
- a cutting tool for cutting the tubular, the cutting tool comprising:
- a body having an opening formed in a wall thereof;
- and
- a radially extendable cutter arranged to extend from the opening to contact an inside wall of the tubular.
An apparatus for use in a tubular in a wellbore, comprising:
- an anchoring mechanism for coupling the apparatus to the tubular;
- a housing connectable to a wireline having a conductor;
- and
- a radial cutting torch for cutting the tubular, the radial cutting torch comprising:
- a body having a surrounding wall defining an elongated chamber;
- a plurality of spaced apart outer apertures formed through the surrounding wall;
- at least one combustible charge disposed in the chamber;
- a heat shield wall disposed adjacent to a length of the surrounding wall;
- and
- a plurality of spaced apart inner apertures formed through the heat shield wall in alignment with the plurality of spaced apart outer apertures.
An apparatus for use in a tubular in a wellbore, comprising:
- an anchoring mechanism for coupling the apparatus to the tubular;
- a housing connectable to a wireline having a conductor;
- and
- a radial cutting torch for cutting the tubular, the radial cutting torch comprising:
- a body having a surrounding wall defining an elongated chamber;
- a plurality of spaced apart outer apertures formed through the surrounding wall;
- and
- at least one combustible charge disposed in the chamber,
- wherein said combustible charge is located at positions above, at the level of, and below said apertures.
An apparatus for use in a tubular in a wellbore, comprising:
- an anchoring mechanism for coupling the apparatus to the tubular;
- a housing connectable to a wireline having a conductor;
- and
- a radial cutting torch for cutting the tubular, the radial cutting torch comprising:
- a body having a surrounding wall defining an elongated chamber;
- a plurality of spaced apart outer apertures formed through the surrounding wall;
- at least one combustible charge disposed in the chamber;
- a sleeve disposed around the surrounding wall and having an upper end and a lower end located above and below said apertures respectively;
- and
- first and second seals, each seal disposed between a respective end of said sleeve and the surrounding wall to prevent liquid in the wellbore from entering said apertures.
Dependencies are inferred from the claim text.