US 10,309,179 B2 · Downhole casing pulling tool

Abstract

A pulling tool deploys on a workstring to retrieving a well component, such as casing or a liner, stuck downhole. The tool has an anchor, a puller, and an implement. The implement is supported on the end of the puller and engages the component. Hydraulic pressure supplied downhole moves at least one puller piston coupled to the implement along a piston mandrel to pull the implement and component. An anchor mandrel coupled to the workstring and the piston mandrel anchors the pulling tool downhole. The anchor has slips disposed on the anchor mandrel that engage in surrounding casing when an anchor piston disposed on the anchor mandrel is hydraulically actuated with the communicated pressure.

Claims25

Dependent claims

A downhole pulling tool for deploying on a workstring and retrieving a well component using an implement, the tool comprising:

a mandrel coupleable to the workstring;
an anchor disposed on the mandrel and having at least one slip, the at least one slip hydraulically actuated from an unset condition to a set condition, the at least one slip in the set condition wedged against a portion of the mandrel and supporting the anchor downhole;
and
a puller extending from the anchor and being anchored at a point uphole by the anchor, the puller having at least one puller piston disposed on the mandrel, the at least one puller piston supporting the implement and being hydraulically movable relative to the mandrel from an extended condition to a pulled condition.

1 more element

Dependencies are inferred from the claim text.

Downhole casing pulling tool

Life of this patent

Downhole casing pulling tool

Life of this patent

Abstract

Claims25