Reliable Wireline Packer Deployment in Complex Completions

Operators in the Gulf of Mexico have long faced challenges setting plugs and packers in 9 7/8” casing, where the clearance between toolstring and casing wall is minimal. Small changes in diameter—caused by tiebacks, collars, or debris—can prevent conventional conveyance methods from reaching depth. When this occurs, operators are often forced to switch to drill pipe conveyance, significantly increasing rig time and operational costs. To mitigate this risk, Petromac developed a bespoke centering system: the TTB-X-515 taxi. Designed specifically for 9 7/8” casing, this tool accurately centers the packer within 0.1”, reducing drag and helping the assembly transition smoothly through restrictions. The lightweight, high-strength design ensures the packer stays aligned and balanced throughout the run-in-hole, even in the presence of slight ovalities or internal hardware. The TTB-X-515 system has now been successfully deployed in over 15 operations across the Gulf, including challenging wells with known tieback restrictions. In every case, it enabled plug and packer placement on wireline—avoiding the cost, complexity, and delay of switching to pipe. The result: faster deployment, reduced NPT, and lower overall cost per well. Petromac solved a recurring challenge in GoM: entering a 9⅞” liner through the tieback. Fig 1: Centralizing Tool Taxi supporting the tool to seamlessly pass Tiebacks.