completed the release technique for such packers of the present invention removes such uncertainties the release tool 122 can be run thru tubing on slick line or wire line and latched at latch 124 a pressure intensifier 126 of the type previously described rests on shoulder 128 of the packer or anchor p application of pressure from the surface or the electric line tool puts opposing forces at latch 124 and shoulder 128 until the narrow portion 110 fails in tension this releases the hold of the set position by the lock ring 122 and allows extension and radial retraction of the slips 116 and the sealing element 114 the break 130 is shown in fig1 d if there are multiple packers or anchors p in the well the process can be repeated for each one that is needed to be released as well the setting process can be repeated to set in any order desired other packers or anchors p to isolate a desired zone for example the release tool can be delivered through the production tubing or on wire line or slick line after the production tubing has been removed other downhole tools can be expanded and extended for release in the manner described above other than packers or anchors some examples are screens and perforated liners the techniques described above will also allow for expansion and extension of.