Improvements In Or Relating To Well Abandonment and Slot Recovery
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United States of America Patent
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Issued Date -
Sep 19, 2024
app pub date -
Jul 14, 2022
filing date -
Jul 15, 2021
priority date (Note) -
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status (Latency Note)
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Abstract
Method of removing casing from a well, in which an annulus between the outside of the casing and the inside of a surrounding downhole body is at least partially filled by debris. the perforated section of casing is washed in casing lengths shorter than the perforation length and an attempt made to pull the casing after each shorter length is washed. If the casing is free after washing only a shorter section of the perforated section of casing then it can be recovered and saves the washing time. A bottom hole assembly is described which includes a downhole power tool to exert a greater force to pull the section of casing between washing steps.
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