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Case Study of the First Large Bore Remote Open Fluid Loss Control Device Compatible with all Multilateral Well Levels


 The first large bore remote open fluid loss control device (FLCD) presented in this paper was developed specifically for a tri-lateral TAML level 4 well and then successfully trial tested. Multilateral wells with limited or no pressure integrity at the junction add additional challenges in regards to the design of a fluid loss control device. In those applications, positive pressure cannot be applied against the junction to remotely open the FLCD. Moreover, depending on the final multilateral completion deployed, the access to the FLCD installed in the laterals may be prevented like in the case of the monobore intelligent completion reviewed in this paper featuring inflow control valves (ICVs) across each lateral entrance. Therefore, retrievable FLCDs cannot be used in those instances and the required interventions would add rig time and cost. Alternatively, treatment with Hydroxyethylcellulose (HEC) pills and/or loss circulation material (LCM) can cause skin damage to the reservoir that can affect production negatively. All these requirements were considered to design the FLCD technology presented in this paper to make it compatible for any TAML level in a multilateral well.