| 摘要 |
<p>A method for pulling casing pipes / liner (0) in a petroleum well, comprising the steps of: a) perforating an actual section (0p) of said casing pipe (0) in said well by means of a perforating gun (1), and then b) washing, by means of a washing tool (2) in at least one casing pipe annulus outside the perforated section of said casing pipe (0p) for removing debris material, particles, cement or other bonding substances which otherwise hold said casing pipe section (0) stuck. c) cutting, by means of a cutting tool (3) said casing pipe within or below the perforated section (0p) for releasing it from the deeper residing, remaining portion of said casing pipe in said well. d) pulling said released, washed-out section of said casing pipe (0) out of said well.</p> |
