Improvements in or Relating to Well Abandonment
OwnerDavid Stewartinventor
Life of this patent
Estimating the term…
Abstract
Method and apparatus for removing a section (20) of well tubing (10). A bridge plug (30) is located in the well tubing (10). A first bottom hole assembly (18) comprising a cutting tool (22) and a swivel sub (24) is run-in and landed on the bridge plug (30) and the well tubing (10) is cut to provide a depth reference in this weight set configuration. A second bottom hole assembly (60) comprising a tubing removal tool such as a milling tool (22) is then run in and is landed on the bridge plug (30) to use the depth reference to locate the cut position on any re-entry into the well.
Claims26
A method of removing a section of well tubing, comprising the steps:
- (a) locating a bridge plug in the well tubing;
- (b) providing a first string with a first bottom hole assembly comprising a cutting tool and a swivel sub;
- (c) running the first string into the well tubing and landing the first bottom hole assembly on the bridge plug;
- (d) cutting the well tubing with the first bottom hole assembly landed on the bridge plug to thereby provide a depth reference;
- (e) running in a second string and landing a second bottom hole assembly comprising a tubing removal tool on the bridge plug to obtain the depth reference;
- (f) positioning the tubing removal tool in the well tubing by relation to the depth reference;
- and
- (g) using the tubing removal tool to remove a section of the well tubing.
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Apparatus for removing a section of well tubing, comprising:
- a tubular string supporting a bottom hole assembly suspended therefrom;
- the bottom hole assembly comprising, in order from an end of the tubular string:
- a combined cutting and tubing removal tool;
- and
- a swivel, wherein:
- the swivel is configured to allow rotation of the combined cutting and tubing removal tool when the tubular string is landed on a plug in the well tubing.
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Dependencies are inferred from the claim text.