Through the utilization of the feedback from an electric-line shifting tool, the operator was able to design an intervention to restore hydraulic control of a failed surface-controlled adjustable sliding sleeve without pulling the entire completion. The smart well completions designed by the operator incorporated adjustable sliding sleeves activated hydraulically from the surface to provide downhole choking capability. In this case study, the adjustable sliding sleeves had failed closed and its position could not be determined. The sliding sleeves appeared to fail hydraulically as the well could not be brought onto production after the running of the initial completion. The fully instrumented slim electrical-line shifting tool was deployed to diagnose the condition of the adjustable sliding sleeves, in-situ, before committing to a major workover intervention to pull and replace the completion. With the slim electrical-line shifting tool, the operator was able to successfully latch into the shifting profile and perform a series of shifting operations capturing the real-time data from the shifting tool and the production platform hydraulics and well sensors. This enabled analyzing, diagnosing, and making an informed decision on the best options on how to intervene without the time and cost intensive operation of pulling the completion. This case study demonstrated the value of a fully controllable instrumented electrical-line powered shifting tool for the purposes of troubleshooting and diagnosing of completion problems. Its ability to adjust force and displacement with on-board sensors provided feedback for effectively troubleshooting and diagnosing the condition of well components downhole in real time. Ultimately, the deployment of the instrumented slim shifting tool mitigated a full workover and saved the operator USD 60 million.

New electromechanical anchoring and shifting mechanisms for a 2 1/8-in. wireline shifting tool employ innovative linkage designs to enable passage through 2.2-in.-diameter restrictions and deployment in casings up to 5.0-in. inner diameter. The anchoring system delivers 60,000-lbf force through the entire opening range, and the tool provides more than 16,000 lbf of linear actuation force to the pressure- activated shifter. Using wireline shifting tools for sliding sleeves, pulling plugs, fishing, and other operations requiring high axial forces is becoming more common because the tools generate forces comparable with surface- controlled pipe-conveyed devices while offering excellent operational control and real-time feedback downhole. Because operations may include going through a small-diameter restriction before shifting in a larger borehole, tools must open to a large diameter, a property known as the expansion ratio. However, as the expansion ratio increases, the ability of conventional tools for generating large linear forces diminishes. New anchor and shifting designs feature large expansion ratios while preserving the ability to deliver large linear loads. Solutions are presented to the numerous challenges of the design for a wireline toolstring typically including an anchor, linear actuator, and shifting tool. The anchoring system has the capability to apply constant radial force that is independent of the borehole size. As with all intervention tools, it cannot stick to the tubular and must be fail-safe and fully retractable within the tool outside diameter (OD) in case of a power loss, even in high-debris environments. Integrity of the tubular where the anchor is set must be maintained. The anchoring force must not be influenced by the axial push/pull force of the linear actuator. Self-centralization of the anchoring system is needed to eliminate the large bending forces that would otherwise occur from the linear actuator action. Both the anchor and shifting tool must have features that enable pulling them out of hole reliably, even through a restriction. Force and opening displacement sensors are important in giving real-time feedback of the state of the system. In combination with integrated firmware, this enables the system to react to events in the hundred-milliseconds range for effective, high-accuracy operations. Examples are presented for tool usage for specific applications. The novel designs presented in this paper expand the operating envelope of mechanical services on wireline to operations in wells that were previously not serviceable by such tools. Wider application of wireline tools will lead to reduced operational time and bring an increased success rate and intervention reliability on a lower cost conveyance platform.