Production string activated wellbore sealing apparatus and method for sealing a wellbore using a production string

A wellbore sealing apparatus positioned along production string tubing, the apparatus comprising,

• an outer sleeve, having an uphole end, a downhole end and a slot positioned between both ends;
• an inner mandrel telescopically received within the downhole end of the outer sleeve, a downhole end and a midsection, the midsection having a peg positioned to interact with the slot in the outer sleeve;
• a compressible and horizontally expanding sealing element disposed on the midsection of the inner mandrel;
• an actuator interaction assembly, disposed on the downhole end of the inner mandrel, having a means to couple to an actuator;
• a top seal pusher disposed on the inner mandrel positioned between the outer sleeve and the sealing element;
• and
• a bottom seal pusher disposed on the inner mandrel positioned between the sealing element and the actuator interaction assembly;
• wherein when the actuator interaction assembly couples to the actuator, the inner mandrel is pushed into the outer sleeve and the top and bottom seal pushers exert pressure on the sealing element such that it compresses and expands to form a seal with the wellbore.