Setting method for coiled tubing run, through tubing bridge plug

摘要

A through tubing downhole tool, such as a bridge plug is delivered on coiled tubing. The setting process entails an initial pressurization to anchor the tool and compress its sealing element. The remainder of the needed force for setting the tool can come from an upward pull on the coiled tubing. Should more force than can be delivered from a pull on the coiled tubing be required to finish the setting and releasing process from the downhole tool, a jar or impact tool can be incorporated to boost the applied uphole force that is delivered from the pull on the coiled tubing at the surface. Alternatively, a pressure amplifier can be fitted to the coiled tubing so that a smaller pressure applied to the coiled tubing at the surface can deliver the required force to set and release from the downhole tool.