Thru-Tubing Inflatable Cement Retainer The Thru-Tubing Cement Retainer (TTCR) allows permanent isolation and cementation of a lower zone without pulling the production tubing and packer. The built-in retrievable spotting valve provides a means of spotting cement to the top of the tool so unwanted fluids are not pumped into the formation. Because the retainer and spotting valve operations do not require rotation, the tool can be run on coiled tubing as well as threaded tubing. Thru-Tubing Cement Retainer Body OD [inch] Element OD [inch] Specification Inside Diameter [inch] Length with Spotting Valve [inch] Length without Spotting Valve [inch] Guide Ring OD [inch] Min. Restriction to Pass Through [inch] 1.690 1.690 0.460 175 112 1.753 1.859 2.125 2.125 0.625 175 112 2.188 2.338 2.500 2.563 2.750 2.750 2.813 3.025 3.000 3.000 0.815 177 114 3.063 3.300 3.375 3.438 3.713