Relating to well abandonment
Number of patents in Portfolio can not be more than 2000
United States of America
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Apr 12, 2022
Grant Date -
Jul 1, 2021
app pub date -
Sep 28, 2018
filing date -
Sep 28, 2018
priority date (Note) -
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status (Latency Note)
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Abstract
Apparatus (10) and method for removing a section of well tubing. A work string including a hydraulic tensioning device (14) and a section mill (12) a run in a rigless arrangement to provide continuous upward milling of the tubing (24) by raising the work string at a desired rate of progress. The hydraulic tensioning device (14) has a lower end (34) moveable longitudinally relative to the work string by application of fluid pressure in the work string to apply a weight on the section mill. The hydraulic tensioning device includes a self-correcting mechanism (30) to maintain the lower end at a position between a fully extended position and a fully retracted position to provide continuous milling of the tubing by the section mill at a milling rate matching the rate at which the work string is lifted. Embodiments are described for use in a rigless well abandonment procedure.
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