The PARVEEN Large Bore “Sure-Lok” is a compression set, retrievable packer that allows the tubing to be left in a tension, compression, or neutral condition.Its features include- Internal by-pass,Opposed dovetail slips for positive set,Holds pressure from above or below,Can leave tubing in a tension, compression, or neutral condition,Right hand rotation sets and releases the packer retracted dovetail slips,Converts to mechanical bridge plug with the addition of a valve Optional packing element stems and Large Bore.