Wingoil Fully Dissolvable & Disintegrating Frac Plug

Applications

• Mainly used in vertical or horizontal well casings for layered section fracturing.

• Completion casing open hole layered sectioned fracturing construction.

• Other temporary plugging operations.

Features

The structure is simple and user-friendly, offering various specifications—Φ72, Φ85, Φ88, Φ98, Φ102, and Φ108—to accommodate staged fracturing requirements for different well diameters.

• High Compressive Strength: Designed to withstand operations in medium and deep wells, with all components, including sealing parts, made from degradable materials that leave no residue after dissolution.
• Specialized Fracturing Bridge Plug: Equipped with a central production channel, allowing direct production after fracturing. The plug fully dissolves in wellbore fluid, eliminating the need for drilling.
• Compact Design: Features a short body length and minimal seat-seal displacement.
• Enhanced Performance: Compared to rubber-tube-sealed soluble bridge plugs, it offers better temperature adaptability—performing well in both lower and higher temperature ranges—and ensures thorough dissolution post-construction.
• Drillability: In special cases where removal is required, the plug can be efficiently drilled out using standard high-performance milling tools.
• Adaptability in Non-Water Environments: For non-water operation wells, the plug can be used alongside acidic rapid-degradation fluids.

Working Principle

The Wingoil all-metal dissolvable frac bridge plug is a temporary isolation frac plug designed and manufactured using water-soluble materials. It consists of components such as a throwaway screw, top wire, ceramic column, O-ring, sealing ring, lower support, slips, and take-off ring.

1. Installation:

The plug is attached to the adapter of the plug-feeding tool using the throwaway screw. It is then delivered to the designated setting position via cable or coiled tubing.

2. Positioning and Activation:

Once positioned using CCL calibration, the plug is activated either by igniting the plug-feeding tool or by pumping liquid from the surface. The generated gas pressure from a gunpowder column or hydraulic pressure from the pumped liquid pushes the vertebral body. The take-off ring restricts the movement of the mandrel, allowing relative displacement between the mandrel and vertebral body.

• The vertebral body moves downward, pushing the sealing ring and slip cone.
• The sealing ring deforms under thrust, expanding to seal the sleeve’s inner cavity while the inclined surface of the slips extends outward.
• The slips bite into the casing’s inner wall to ensure anchoring.

3. Setting and Disconnection:

When the applied thrust reaches 120-130 KN or higher, the plug is fully set and anchored. The mandrel of the plug-feeding tool is then disengaged by disconnecting the hand-off screw, allowing the plug-feeding tool to be retrieved.

4. Fracturing Operation:

After setting, the inner cavity of the plug is sealed by an inserted sphere, creating a one-way flow channel. Fluid can only flow upward from the bottom, while the upper fluid is blocked, ensuring the bridge plug remains sealed during fracturing.

5. Post-Fracturing:

Once fracturing is completed, fluid from the lower interval flows through the one-way channel for normal blasting or production. During this process, the Wingoil all-metal dissolvable bridge plug degrades and dissolves in the wellbore fluid, leaving no residue.

Operation Manual

• Before deploying the bridge plug for plugging operations, ensure the wellbore is thoroughly cleaned, scraped, and cleaned to guarantee unobstructed flow.

• Inspect the assembly of the plug-feeding tool carefully prior to lowering it into the well. All connections must be secure, and the outer cylinder of the tool should fully abut the mandrel shoulder.

• When lowering the tool using a pipe string or cable, maintain a controlled speed not exceeding 30 m/min. Sudden lifting, abrupt release, or strong impacts are strictly prohibited. If pumping is used, the recommended displacement is 1.8–2 m³/min.

• For staged fracturing wells, accurately measure the displacement to ensure the complete removal of sand from the casing in the plugging section.

• During hydraulic plug-feeding operations, increase the pump injection pressure incrementally in 5 MPa steps, pausing for one minute at each step to achieve stable setting.

Operation Precautions

• Store the tool in a cool, dry environment.

• During transportation, ensure it is securely placed in a protective box, avoiding any strong collisions.

• Do not use the tool if there is any local deformation or abnormality on its outer surface.

• The bridge plug must not be deployed until the wellbore sand has been thoroughly cleaned following fracturing sand plugging.

• In the event of abnormal conditions during horizontal well pumping, analyze the cause. If early setting is ruled out, adjust the displacement as needed to continue pumping.