Double Slip Composite Bridge Plug | API 11D1 | 10,000 PSI | Bidirectional Anchor

The Double Slip Composite Bridge Plug is a high-performance downhole isolation tool specifically developed for zonal isolation in oil and gas wells, particularly for applications requiring bidirectional anchoring stability under high differential pressure. Unlike single-slip configurations that provide one-way anchoring, this plug features upper and lower slips that engage the casing wall from both directions, preventing plug displacement in either direction during pressure fluctuations - making it especially suitable for high-pressure multi-stage fracturing, deviated wells, and wells with significant pressure reversals. The plug body is manufactured from high-grade glass fiber-reinforced epoxy resin composite (with carbon fiber-reinforced thermoplastic available as an upgrade), with only a minimal number of metal components - including shear pins and hard metal slip inserts - for critical functions. This composite construction provides excellent mechanical strength, corrosion resistance, and rapid drillability: after operations are complete, the plug mills into small, lightweight cuttings that are quickly circulated out of the wellbore, avoiding stuck pipe issues and reducing total drill-out time by up to 50% compared to traditional cast iron bridge plugs. A key differentiator of this design is the integrated one-way check valve, which allows fluid to flow from the lower zone to the upper zone after fracturing - enabling rapid flowback and well commissioning while reducing bottomhole pressure to minimize post-fracturing cross-zone contamination. The dual-element packing system (optimized from traditional three-element designs for shorter overall length) provides reliable annular sealing at rated pressures up to 10,000 PSI (70MPa) and temperatures from -40°C to 150°C (-40°F to 300°F). Setting is accomplished via standard wireline ignition or hydraulic activation using Baker #10/#20 compatible setting tools, with run-in speeds up to 500 ft/min. Available for casing sizes from 3.5" to 7" with full customization of outer diameter, inner diameter, length, and pressure/temperature ratings, the double slip composite bridge plug is widely applied in plug-and-perf completions, multi-stage fracturing, temporary well abandonment, bottom water shutoff, and deviated well isolation - providing a reliable, cost-effective, and easily removable zonal isolation solution for demanding well conditions.

1. Bidirectional Double-Slip Anchoring for Superior Stability

Equipped with upper and lower slips, the bridge plug achieves bidirectional anchoring in the casing - the upper slip resists downward force while the lower slip resists upward force - significantly improving total anchoring force and directional stability compared to single-slip designs. The slips are manufactured from high-strength composite material with precision-embedded hard metal inserts (carbide button teeth) that firmly engage the casing wall, preventing plug movement or rotation even under sustained high differential pressure up to 10,000 PSI (70MPa) and during subsequent milling operations. This bidirectional anchoring is particularly valuable in high-pressure fracturing, deviated wells, and wells with pressure reversals where single-slip plugs may experience slippage.

2. High-Strength Composite Material with Rapid Drill-Out

The main structural components are manufactured from high-grade glass fiber-reinforced epoxy resin composite, with carbon fiber-reinforced thermoplastic available as a high-performance upgrade. Only critical functional parts - shear pins and hard metal slip inserts - remain metallic. This composite construction delivers excellent mechanical strength, chemical corrosion resistance, and low permeability, while being up to 60% lighter than equivalent cast iron bridge plugs. Most importantly, the composite body is engineered for fast drill-out: a single plug can be milled out in 10–30 minutes using conventional tools, generating fine, lightweight cuttings that are easily circulated out of the wellbore - reducing total drill-out and cleanout time by up to 50% compared to cast iron alternatives and minimizing the risk of stuck pipe from accumulated metal debris.

3. Dual-Element Sealing System with Reliable Pressure Containment

Featuring a dual-packer design optimized from traditional three-element structures for shorter overall length, the plug uses high-quality mold-made rubber packing elements with smooth surface finish. Under setting force, the two sealing elements expand evenly to form a tight, uniform seal against the casing inner wall, effectively isolating wellbore zones. The system is tested and rated to withstand working pressures up to 10,000 PSI (70MPa) and temperatures from -40°C to 150°C (-40°F to 300°F), maintaining seal integrity even in extreme downhole environments and preventing cross-zone fluid flow during fracturing, cementing, or testing operations.

4. Integrated One-Way Check Valve for Rapid Flowback

A unique feature of this bridge plug is the built-in one-way check valve that allows fluid to flow from the fractured zone below to the wellbore above, while preventing reverse flow. This enables rapid flowback after fracturing operations for quick well commissioning, reduces bottomhole pressure to minimize post-fracturing cross-zone contamination, and facilitates safer deployment of milling tools by equalizing pressure across the plug. The check valve adds significant operational efficiency compared to bridge plugs without this feature, which require additional perforation or intervention to initiate flowback.

5. Fast Deployment with Standard Tool Compatibility

The plug is connected to the setting tool via shear pins and set through wireline ignition or hydraulic activation - both standard methods in oilfield operations. After setting, the shear pins fracture and the setting tool releases and is retrieved. The streamlined composite body allows run-in speeds up to 500 ft/min (152 m/min), reducing trip time while minimizing the risk of premature setting, expansion, or jamming during deployment through deviated wellbores and casing restrictions. The plug is fully compatible with standard Baker #10 and #20 setting tools and requires no specialized equipment or operator training.

6. Wide Size Range with Full Customization

The plug is available for casing sizes from 3.5" to 7" (99.56mm to 177.8mm), covering the majority of production and intermediate casing sizes used in oil and gas wells. Outer diameter, inner diameter, overall length, pressure rating, temperature rating, and composite material formulation can all be customized to match specific well conditions and operational requirements. OEM and ODM services are available, including custom branding and private labeling, to meet your specific market and functional needs.

The Double Slip Composite Bridge Plug operates through a reliable setting process, bidirectional zonal isolation service, and rapid drill-out removal:

Step 1: Running and Positioning

The bridge plug is connected to a Baker #10 or #20 compatible setting tool via shear pins and run into the wellbore via wireline or hydraulic deployment. The streamlined composite body allows run-in speeds up to 500 ft/min, and the plug is lowered to the predetermined target depth.

Step 2: Setting Activation

Setting is initiated by wireline ignition or hydraulic pressure activation. The setting tool generates axial force that drives the upper and lower setting cones along the mandrel, expanding both slips radially outward simultaneously. The hard metal inserts on the slips embed into the casing wall, creating a firm bidirectional anchor - upper slip resists downward movement, lower slip resists upward movement.

Step 3: Seal Compression

As setting force increases, the cones shear the shear pins and continue moving, compressing the dual-element rubber packing system. The two elastomer elements expand evenly against the casing inner diameter, forming a pressure-adaptive gas-tight seal across the annulus between the plug and casing.

Step 4: Setting Tool Release

After the plug is fully set with both slips anchored and the seal compressed, the shear pins connecting the setting tool to the plug fracture at predetermined load. The setting tool is released and retrieved to surface, leaving the plug securely anchored downhole.

Step 5: Zonal Isolation Service

During fracturing, cementing, or testing operations, the bidirectional double-slip anchor maintains stable plug positioning under differential pressure up to 10,000 PSI (70MPa), while the dual-element seal prevents fluid cross-flow between isolated zones. The integrated check valve allows controlled one-way fluid flow from the lower zone to the upper zone for flowback operations.

Step 6: Drill-Out Removal

After downhole operations are complete, the composite bridge plug is drilled out using conventional milling tools (coiled tubing or jointed pipe). The composite body mills out in 10–30 minutes per plug, generating fine debris that is circulated out of the wellbore, restoring full drift diameter for production or subsequent operations.

Every Double Slip Composite Bridge Plug is manufactured under an ISO 9001:2015 certified quality management system and designed in accordance with API 11D1 specifications for downhole packers and bridge plugs. Our quality assurance process covers the full product lifecycle:

Raw Material Control

Composite material batches - glass fiber-reinforced epoxy resin or carbon fiber-reinforced thermoplastic - are sourced from approved suppliers and accompanied by material test reports (MTR) verifying fiber content, resin system, and mechanical properties. Each batch undergoes tensile strength testing, flexural testing, hardness testing, and chemical resistance verification. Hard metal slip inserts and elastomer sealing elements are inspected for dimensional accuracy and material certification before assembly.

In-Process Manufacturing Control

Composite body components are manufactured using documented layup, curing, and machining processes. Critical dimensions - including outer diameter, seal groove dimensions, slip insert positioning, cone angles, and check valve function - are inspected at first-article, in-process, and final inspection stages using calibrated micrometers, bore gauges, and coordinate measuring machines.

Performance Testing (100% of production)

• Hydrostatic Pressure Seal Test: Each plug is assembled and tested at rated differential pressure (10,000 PSI / 70MPa) with zero visible leakage as the pass criterion

• Setting Function Test: Sample plugs from each production lot are set in test casing to verify dual-slip expansion, seal compression, check valve function, and shear pin release

• Drill-Out Efficiency Test: Representative samples are drilled out to verify drill-out time within 10–30 minutes and debris characteristics • Check Valve Function Test: Each integrated check valve is tested for correct one-way flow direction and sealing

• Tensile and Compression Testing: Composite material samples tested to verify mechanical properties meet specification

Warranty and Support

We provide a 12-month warranty from the date of shipment against manufacturing defects in materials and workmanship. Our engineering team provides 24-hour online technical support for product selection, running procedures, drill-out parameter optimization, and field troubleshooting.

1. Multi-Stage Hydraulic Fracturing (Plug-and-Perf)

The double slip composite bridge plug is the core zonal isolation tool for plug-and-perf (PnP) multi-stage fracturing in shale gas, tight oil, and low-permeability reservoirs - the primary demand scenario in North America and the Middle East. The bidirectional anchoring design ensures stable plug positioning during high-rate pump-ins and pressure reversals between stages, while the integrated check valve enables rapid flowback after each stage or after total completion. After all fracturing stages are complete, the plugs are drilled out in a single run - 10–30 minutes per plug - restoring full bore access for production.

2. Temporary Well Plugging and Workover

Used for temporary wellbore isolation during workover operations, leak testing, cementing, and well killing, the plug blocks formation fluid flow to ensure safe above-plug operations. The bidirectional anchoring provides reliable isolation even when pressure differentials shift direction during workover, and the composite construction resists corrosion from well killing fluids and acid treatments. After operations are complete, the plug is quickly drilled out to resume normal well operations.

3. Deviated Well and Deformed Casing Applications

The double slip anchoring design has strong adaptability to non-vertical wellbores, providing stable anchoring in deviated wells, horizontal sections, and wells with slightly oval or deformed casing where single-slip plugs may not engage uniformly. The upper and lower slips distribute anchoring force across two contact zones, reducing the risk of partial engagement or slippage in non-uniform casing conditions.

4. Corrosive Formation and Offshore Operations

The glass fiber or carbon fiber composite body is inherently corrosion-resistant, making the plug suitable for oil and gas wells with high acid, alkali, or salt content - including offshore oilfields and high-H2S/CO2 formations where traditional metal bridge plugs may experience corrosion-related failure. The lightweight composite construction also reduces transportation and handling costs on offshore platforms where deck weight and crane capacity are constrained.

5. Bottom Water Shutoff and Well Completion Optimization

The plug can be used for temporary bottom water shutoff during completion or recompletion operations, isolating water-producing zones while upper zones are treated or produced. The integrated check valve allows controlled flowback from below if needed. When used in conjunction with fracturing balls, setting tools, and other completion equipment, the double slip composite bridge plug forms part of a complete optimized well completion system - shortening completion cycle time, reducing operational costs, and improving overall hydrocarbon recovery efficiency.

Q: What is the difference between double-slip and single-slip composite bridge plugs?

A: The primary difference is anchoring configuration. A double-slip plug has upper and lower slips that provide bidirectional anchoring - resisting force from both above and below - making it more stable under high differential pressure, pressure reversals, and in deviated wells. A single-slip plug has one slip assembly and is more compact, shorter, and typically more cost-effective for standard-pressure vertical wells. Both types are fully composite and drillable. The choice depends on well conditions: double-slip for high-pressure, deviated, or pressure-reversal wells; single-slip for standard wells where compact size and lower cost are priorities.

Q: What is the difference between a composite bridge plug and a cast iron bridge plug?

A: A composite bridge plug uses a non-metallic composite body (glass fiber or carbon fiber reinforced) that drills out in 10–30 minutes per plug with fine, easily circulated debris. A cast iron bridge plug is metallic and typically requires 45–90 minutes per plug to drill out, generating larger metal cuttings that increase stuck pipe risk. Composite plugs are also up to 60% lighter and more corrosion-resistant. Cast iron plugs are generally lower in unit cost and may be preferred for permanent abandonment where drill-out speed is less critical.

Q: What is the difference between a composite bridge plug and a dissolvable bridge plug?

A: A composite bridge plug requires mechanical drill-out after use (10–30 minutes per plug), while a dissolvable bridge plug degrades completely in wellbore chloride fluids without any intervention. Dissolvable plugs eliminate coiled tubing mill-out entirely but are significantly more expensive. Composite plugs provide a cost-effective middle ground - faster and cleaner drill-out than cast iron, at a fraction of the cost of dissolvable technology.

Q: How does the integrated check valve work?

A: The built-in one-way check valve allows fluid to flow from the lower zone (below the plug) to the upper zone (above the plug), but prevents reverse flow. After fracturing, this enables rapid flowback of treatment fluids from the lower zone through the plug to the surface - accelerating well cleanup and commissioning. It also helps equalize pressure across the plug before milling operations begin, reducing the risk of pressure surges when the plug is penetrated.

Q: What is the drill-out time and what parameters are recommended?

A: The composite body drills out in 10–30 minutes per plug using conventional milling tools, depending on plug size, milling tool type, and well conditions. Recommended drill-out parameters: rotation speed 60–150 RPM, weight-on-bit 5–15 kN, drilling fluid viscosity 15–30 mPa·s, minimum annular velocity 36.6 m/min to ensure effective debris circulation. We provide detailed drill-out procedures with each order.

Q: What casing sizes and certifications are available?

A: Standard sizes cover 3.5" to 7" casing (99.56mm to 177.8mm), with custom outer diameters, inner diameters, and lengths available. The plug is designed and manufactured to API 11D1 specifications, and our facility is ISO 9001:2015 certified. CE/PED certification and third-party inspection (BV, SGS, DNV) are available on request.

Q: What is the MOQ, delivery time, and sample policy?

A: The MOQ is 1 piece for standard models. We provide free samples for standard products (customer covers shipping cost); customized samples require a sample fee that is deductible from subsequent orders. Standard products ship within 7–15 working days; customized products require 20–30 working days. We ship from Shanghai or Ningbo port, with door-to-door delivery available on request. Payment terms include T/T (30% deposit, 70% before shipment), L/C at sight, and Western Union.

Q: What setting tools are compatible and what are the deployment methods?

A: The plug is fully compatible with standard Baker #10 and #20 setting tools. Setting can be accomplished via wireline ignition or hydraulic activation, both standard oilfield methods. Run-in speeds up to 500 ft/min (152 m/min) are possible, and the plug is suitable for vertical, deviated, and horizontal well deployments. No specialized equipment or operator training is required.

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