US 11,840,902 B2
Well abandonment
Alan Fairweather, Aberdeen (GB); and David Stewart, Aberdeen (GB)
Assigned to ARDYNE HOLDINGS LIMITED, Aberdeen (GB)
Filed by Ardyne Holdings Limited, Aberdeen (GB)
Filed on Apr. 13, 2022, as Appl. No. 17/719,448.
Claims priority of application No. 2105602 (GB), filed on Apr. 19, 2021.
Prior Publication US 2022/0333454 A1, Oct. 20, 2022
Int. Cl. E21B 31/16 (2006.01); E21B 31/20 (2006.01); E21B 29/00 (2006.01)
CPC E21B 31/16 (2013.01) [E21B 31/20 (2013.01); E21B 29/005 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method of recovering casing from a wellbore, comprising the steps:
(a) mounting a bottomhole assembly (BHA) on a pipe string, the BHA comprising a casing cutter and a casing spear;
(b) running the BHA into the casing;
(c) locating the casing spear at an upper point in the casing, the upper point being above an estimated stuck point;
(d) mounting a logging tool on a wireline string and running the wireline string through a central bore of the pipe string to exit the pipe string below the casing spear;
(e) logging a first length of the casing with the logging tool by movement of the wireline string, the first length including the estimated stuck position;
(f) applying tension to the casing by pulling the pipe string upwards, with the casing spear anchored to the casing;
(g) logging a second length of the casing with the logging tool by movement of the wireline string, the second length including the estimated stuck position and overlapping at least a portion of the first length;
(h) identifying a verified stuck point by comparison of logs of step (e) and step (g);
(i) moving the casing cutter to a cutting position relative to the identified stuck point;
(j) cutting the casing to provide a cut section of casing; and
(k) pulling the pipe string with the casing spear anchored to the cut section of casing to recover the cut section of casing from the wellbore.