Cut-to-retrieve multiport packers are an effective choice when stacking isolation packers for ICs. Retrieval of the entire IC completion in one trip is facilitated by the nature of the cut-to-release desigu, and explosive jet cutters can effectively sever control lines and electric lines to facilitate the retrieval. Intervention to cut the packer targets can be effectively performed using wireline as a conveying string, and the pump-down method is a cost-effective alternative to e-line tractors, even in ERD well trajectories. The use of explosive jet cutters is very efficient in cutting the packer targets, but the shock from the explosive charge can affect the integrity of gauges and/or flow control valves that are placed in proximity of the packers. It is recommended that a minimum "distance of 20 ft be kept between a cut-to-release packer and a flow control valve or gauge if explosive jet cutters are planned to be used during the retrieval operation. The compatibility of wireline tractors, electronic release disconnect and explosive firing system has not been tested before, and therefore precluded the tractor option to be selected as one of the back-up contingency methods. Further stack-up testing of these components could facilitate alternative options in future IC completions work-over or intervention operations.
展开▼
