The size of the 9 5/8-in. OneTrip StarBurst hollow whipstock creates Levels 3 and 4 multilateral junctions. It is used in 40- to 53.5-lb/ft (59.5- to 79.6-kg/m) casing.

Weatherford’s OneTrip StarBurst multilateral system creates a Level 4 cemented junction with the full-liner access to the lateral bore. As the world’s first one-trip Level 4 multilateral system, the StarBurst system incorporates the proven QuickCut™ milling system for orientation of the whipstock-anchor assembly, milling of the window, and drilling of the rathole in a single run. The unique, multipurpose hollow whipstock is used in the milling, drilling, and completion phases. 

After the window is milled and the lateral is drilled, a conventional lateral liner assembly is run into the lateral and anchored back to the main bore above the window. Once the liner is run, it can be cemented or left uncemented. Perforation of the OneTrip StarBurst hollow whipstock and the liner at the junction is accomplished by the special StarBurst perforating gun, which uses a controlled-depth charge to maintain junction integrity.

A higher pressure and temperature model is available.

The OneTrip StarBurst system is well suited for intelligent completions.

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