The primary job of a frac plug is to isolate between stages. Once set, the plug anchors in and seals the casing to provide isolation. The seal stops fluid from bypassing the stage, and the anchor ensures the plug doesn’t move during the frac.

Plug Setting

Plugs deploy on wireline with an explosive setting tool. The setting tool uses a power charge to exert an axial force on the plug components. As the setting tool strokes downward, it compresses the seal and anchor to lock it into the casing.

Plug Seal

The plug seal is a rubber element. When compressed, it creates a seal on the casing ID and the plug mandrel’s OD. The element must span the mandrel/casing gap and generate enough pressure between the two to hold up to 10,000 psi of pressure.

Plug Anchor

Components called cones & slips create the anchor. During setting, the slips ramp up the cone creating a wedge between the cone and the casing ID. The slips have hardened edges or inserts designed to bite into and lock inside the casing. Most plugs have a slip system above and below the seal. The lower slip keeps the plug from moving downward during the frac, and the upper slip ensures the compression stays in the element after setting.

WellBoss Anchor & Seal

Boss Hog plugs are synonymous with maintaining isolation, and the Boss Hog all composite are no different. Our proprietary slip materials and geometries ensure zonal isolation every single time. The latest Boss Hog All Composite has 70,000+ runs combining isolation with ease of milling.

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