Bulldog Single-Open Frac Sleeve

Bulldog Frac sleeves are activated with the Bulldog Frac BHA, which allows operators to locate, shift open, isolate, and stimulate each stage. Bulldog Frac sleeves are smaller, lighter, and easier to handle than any other sleeve on the market.

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  • Ruler Specifications
  • Resources Resources

Bulldog™ Frac single-open (SO) sleeves were developed from our successful North Sea i-Valve technology, which features a mechanical-shift, single-open sleeve specifically designed for horizontal multistage land applications. The Bulldog Frac sleeve is activated using the proprietary Bulldog Frac bottomhole assembly (BHA), which allows operators to locate, shift open, isolate, and stimulate each stage with the help of a multiset packer. Pumping down the coiled tubing annulus permits higher pumping rates and allows for better understanding of fracture geometry and dynamics.

The Bulldog Frac sleeve is compact, light, and easy to handle, which improves makeup times and reduces safety risks. Because it is a mere 24 in. (610 mm) in length, no pup joints are required. The design of the Bulldog Frac sleeve is full bore and includes a large flow area of 10.5 in.2, a 45% increase over similar products. This means operators can remove choke points for their production while maximizing stimulation flow rates.


  • i-Valve locating and shifting profile
  • i-Frac CEM seal stack design
  • Pinpoint fracture initiation in cemented applications
  • Full-bore body design
  • Each sleeve provides accurate depth location during shifting operations
  • Compact, lightweight, and robust
  • Fully compatible with cemented and openhole completions


  • Increased pumping efficiency and rate
  • No stage count limitations
  • No ID restriction to choke production
  • Safer, simpler, and more efficient handling on the rig floor
  • No handling pup joints required


  • Acid or proppant stimulations
  • Completions requiring reliable single point of entry
  • High stage count stimulation designs
  • Formations with a high frequency of screen-outs

Bulldog Single-Open Frac Sleeve Specifications

Bulldog Frac 450
OD 5.5 in. (139.70 mm)
ID 3.89 in. (98.81 mm)
Length1 24.0 in. (610 mm)
Weight 58 lb (26 kg)
Working pressure 10,000 psi (69,000 kPa)
Tensile strength 338,000 lbf (1503 kN)
Temperature 350 °F (177 °C)
Threads2 LTC standard

1 Lengths may vary depending on end sub threading.

2 Premium connections available

  • Bulldog Frac Single Open SO Sleeve Data Sheet
  • Bulldog Frac Bottomhole Assembly (BHA) Data Sheet
  • Bulldog Frac The Dirty Test Sand Endurance Test Flyer

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