IV. Surge Reduction System - f. Dart Catcher

The Allamon Tool Company Dart Catcher was designed in order to enhance cement jobs and drill out for operators running large sub-sea casing strings in deepwater. The Dart Catcher is run near the bottom of an inner workstring during deployment of a large sub-sea casing string. Upon the drill pipe wiping dart landing in the Dart Catcher a pressure indication is created prior to the tool shifting into the by-pass position. The pressure indication provides critical displacement volume information to the service technician and operator. Following the pressure indication the Dart Catcher shifts to the by-pass position and allows for completion of cement displacement. The drill pipe wiping dart remains in the Dart Catcher and is retrieved from the wellbore upon removal of the workstring, therefore enhancing drill-out of the casing shoe. Features/Benefits Pressure indication for enhanced cement displacement Retrievable dart for enhanced drill-out Dart Catcher Series OD (in.) Minimum ID (in.) Tensile Rating (kips) Pressure Rating (psi) 300 7.06 3.068 1,789 5,000