Locator type packer plug is used to convert a model WC-WSSDP & WC-WLSDP retainer production packer that has been previously set, into a temporary bridge plug. It permits the performance of pressuring operation above the packer without affecting the zones below. It is attached with shear screws to a shear sub which is made up on the bottom of the work string or a retrievable squeeze tool. Set-down weight shears the screws and leaves the plug in the packer. It is retrieved with a conventional overshot.