Back to results
US 11,230,898 B2Granted
Well abandonment and slot recovery
AssigneeArdyne Holdings Limited
InventorGeorge Telfer
Life of this patent
Estimating the term…
Abstract
Method and apparatus for single-trip cementing and casing cutting for well abandonment and slot recovery. Using a tool string including a casing cutter and a stinger, where the casing cutter has a central through bore including a wall to isolate the cutting assembly from the cement, cement can be passed through the cutter and deposited using the stinger to form a plug. Embodiments of casing cutters are provided for parting an upper length of casing from a lower length of casing.
Claims14
A method comprising, in a single trip in a well bore, the steps:
- (a) running a tool string downhole in the well bore, the tool string including a casing cutter and a stinger;
- (b) passing a fluidised plugging material through the casing cutter and the stinger to deposit a quantity of the fluidised plugging material into the well bore to form a plug;
- (c) drawing the stinger out of at least a portion of the deposited fluidised plugging material;
- and
- (d) using the casing cutter to part an upper length of casing from a lower length of casing.
2 more elements
Dependencies are inferred from the claim text.