The ’S’ Series running tool is used for basic drop off mechanical release liners. The right-hand releasing running thread is used to attach the liner top assembly to the running string. Often used for scab liners, gravel packs and drop off systems, its simple mechanics allow for easy operations. Once rotated off the liner top, you have the ability to stay sealed into the tie-back for continued operations. Compression is often applied after to set the packer or DSP .