Lining removal method, system and components thereof

Apparatus to excavate lining in a tubing in a well, comprising:

• a reamer body having a forward end;
• and
• a cutter ring releasably connected to the reamer body;
• wherein the reamer body includes a thread spaced from the forward end and wherein the cutter ring includes a thread defined therein to mate with the thread of the reamer body to thereby connect the cutter ring to the reamer body such that the cutter ring is spaced from the forward end.

Apparatus to excavate lining in a tubing in a well, comprising:

• a reamer body having a forward end;
• and
• a cutter ring releasably connected to the reamer body;
• wherein the reamer body includes a thread defined near an end thereof opposite the forward end and wherein the cutter ring includes a thread defined therein to mate with the thread of the reamer body to thereby connect the cutter ring to the reamer body.

Apparatus to excavate lining in a tubing in a well, comprising:

• a reamer body having a forward end;
• and
• a cutter ring releasably connected to the reamer body;
• wherein the cutter ring is a selected one of a plurality of cutter rings each having the same inner diameter such that each is releasably connectable to the reamer body, but each having a different outer diameter.

A method of excavating material of a lining in tubing in a well, comprising:

• rotating circularly disposed inner cutting elements against a radially inwardly disposed annular portion of the material;
• rotating circularly disposed outer cutting elements against a radially outwardly disposed annular portion of the material;
• and
• rotating reaming elements extending between the inner cutting elements and the outer cutting elements.

A cutting tool to cut lining in tubing in a well, comprising:

• a mandrel;
• a first sleeve disposed on the mandrel;
• a second sleeve disposed on the mandrel and connected to the first sleeve such that the first and second sleeves can rotate relative to each other;
• and
• a cutter blade connected to the second sleeve.

A method of cutting lining in a tubing in a well, comprising:

• lowering a cutter blade into a well having a lining in a tubing;
• engaging the lining with the cutter blade;
• and
• moving the engaged cutter blade up the well such that a spiral cut is formed in the lining.

A lining removal tool, comprising:

• an inner engagement member;
• an outer engagement member;
• and
• a coupling connecting the inner and outer engagement members in fixed rotational relation to each other, wherein the coupling includes:
• an outer connector threadedly connected to the outer engagement member and having a non-circular axial opening defined therethrough;
• and
• a bar having an outer shape complementary to and received in the non-circular hole of the outer connector such that the bar is slidable relative to the outer connector but is rotatable therewith, the bar having an end connected to the inner engagement member.

A lining removal method, comprising:

• rotating a sleeve on a plastic lining in tubing in a well;
• gripping the plastic lining with resilient wires attached to an inner surface of the rotating sleeve;
• and
• removing the sleeve, wires and gripped plastic lining from the tubing and the well.

A removal tool, comprising:

• an inner engagement member;
• an outer engagement member;
• and
• a coupling connecting the inner and outer engagement members in fixed rotational relation to each other, wherein the coupling includes a bar having an outer shape complementary to and received in a non-circular hole defined in fixed relationship with the outer engagement member such that the bar is slidable relative to the outer engagement member but is rotatable therewith, the bar having an end connected to the inner engagement member, wherein the inner engagement member is slidable relative to the outer engagement member but rotatable therewith such that the inner engagement member and the outer engagement member are operatively associated to engage material within a well and remove engaged material from the well.