Solutions
Block Lifting & Leap Frogging
In large-scale offshore campaigns—such as Plug and Abandonment (P&A), Hydraulic Workover Unit (HWU) interventions, and well-servicing programs—equipment downtime directly inflates project costs. When operating across multiple offshore platforms, waiting for lifting equipment to be rigged down, transported, and reassembled on the next structure creates severe operational bottlenecks.
To eliminate non-productive time (NPT) and advance project schedules, Thunder Cranes applies the revolutionary logistics concept of “leap-frogging.” By strategically staging multiple modular crane packages across successive platforms, offshore operators achieve continuous operational execution without waiting for lifting assets to catch up.
Key Project Details
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Core Concept: Staggering multiple portable modular cranes across sequential platforms to pre-rig facilities before intervention crews arrive.
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Primary Target: High-volume offshore campaigns (P&A, HWU, Coiled Tubing, and Rigless Jacking Units).
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Key Objective: Eliminate stand-by time for high-day-rate units and drastically compress the overall campaign timeline.
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Primary Benefits: Reduced total project expenditures, optimized asset utilization, zero dependency on native platform cranes, and minimized overall campaign duration.
How the Leap-Frogging Logistics Model Works
Instead of relying on a single modular crane system that must be dismantled and moved sequentially alongside the main work unit, the leap-frogging strategy utilizes two or more modular crane packages (such as the TC90):
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Active Interventions on Platform A: The primary work package (e.g., HWU or RPU) performs well operations supported by the first modular crane (Crane 1).
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Pre-Rigging on Platform B: Days before operations wrap up on Platform A, a second crane (Crane 2) is mobilized and fully rigged up and load-tested on Platform B.
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Seamless Transition: Once work on Platform A concludes, the work package immediately transfers to Platform B, where Crane 2 is ready to receive and assemble it without delay.
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Leap-Frogging to Platform C: While work commences on Platform B, Crane 1 is rigged down on Platform A, moved directly to Platform C, and assembled in advance for the next transition.
Operational Advantages & Impact
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Maximizing High-Day-Rate Asset Utilization: High-cost services like HWUs, Rigless Pulling Units, and Coiled Tubing Units incur high standby rates. Leap-frogging ensures these assets are continuously operational.
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Elimination of NPT: Pre-rigging target platforms completely avoids the period where intervention crews sit idle waiting for crane assembly, testing, and inspection.
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Complementing Platform & Vessel Capabilities: Modular cranes free up native platform cranes for daily operational duties and complement lift vessels by allowing simultaneous multi-platform preparations.
Campaign Results
By applying leap-frogging logistics across multi-well offshore campaigns, operators save critical days on every platform transition. Scaled across dozens of well interventions, this schedule acceleration delivers millions in logistical savings and sets a benchmark for efficient offshore project execution.
