Production casing ripper

A production casing ripper comprising:

• (a) a swedge;
• (b) a spring housing;
• (c) a coupling;
• (d) a main housing;
• (e) an end piece;
• (f) a blade;
• and
• (g) means for connecting the blade to the plunger;
• wherein the spring housing is a piece of tubing comprising two ends;
• wherein one end of the spring housing is attached to the swedge and the other end of the spring housing is attached to the coupling;
• wherein the main housing is a piece of tubing comprising two ends;
• wherein one end of the main housing is attached to the coupling and the other end of the main housing is attached to the end piece;
• wherein the inside diameter of the main housing is greater than the inside diameter of the spring housing;
• wherein the blade is situated inside of the main housing;
• wherein a plunger is situated inside of the main housing;
• wherein a primary spring is situated inside of the spring housing;
• wherein a primary pull rod comprising two ends is connected to the primary spring at one end and to the plunger at the other end;
• wherein the main housing comprises an aperture;
• wherein when hydraulic pressure is introduced through the swedge, the plunger moves downward inside of the main housing and causes the blade to extend through the aperture in the main housing;
• and
• wherein when the hydraulic pressure is released, the primary spring causes the plunger to return to its original position, thereby causing the blade to retract.