AlphaV™ Single-Trip Casing-Exit System Eliminated Dedicated Wellbore-Preparation Run Increased Trip Speed 150%, Saving a Total of 20 Hours’ Rigtime

Set whipstock to target depth without the need for a dedicated wellbore preparation run.
Increase trip speed over conventional re-entry methods.
Complete window and rathole in one milling trip.

Weatherford ISDT experts recommended that the offshore operator run the AlphaV single-trip casing-exit system for its ability to eliminate the wellbore preparation run by including a gauge mill and scraper assembly just below the packer on the toolstring—ensuring a clean setting area for the whipstock.
The system also replaces traditional shear bolts with the patented hydraulic-mill release (HMR) system to enable high-torque and load-bearing capabilities for increased tripping speed. This also enhances safety during tripping operations when abrupt workstring movement can cause premature shear of the whipstock assembly.
The AlphaV system was mobilized to the rigsite and run to target depth. Once the whipstock was set and milling assembly released, a sidetrack window was then milled—all in a single trip.

The exclusive HMR system allowed the operator to increase trip speed by 150%, as compared to conventional casing-exit systems.
The integral full-coverage scraper in the AlphaV system enabled the operator to clean and scrape the setting area in the same trip, prior to setting the whipstock. This eliminated any need for a wellbore-preparation run, saving 19 rigtime hours.
Whipstock toolface orientation, packer setting, and mill release were all conducted hydraulically within predetermined ranges.
The drilling BHA successfully passed through the window without any restriction or interference, ensuring the quality and reliability of the sidetrack—meeting all client KPIs.

Details

Location

Indonesia

Well Type

Offshore

Hole Size

12-1/4 in. (31.12 mm)

Hole Angle

40°

Setting Depth

2,350 ft (716.14 m)

Casing Type/Size

72#SD P110/13-3/8 in. (33.97 cm)

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AlphaV^™ Single-Trip Casing-Exit System