Bulldog Frac System

The Bulldog Frac system is a versatile, robust means of conducting an annular stimulation through Bulldog Frac sleeves. Eliminating wellbore restrictions, operators can push the limits of each treatment and maximize productivity.

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Each Bulldog™ Frac sleeve is located with an active locating system, shifted, and stimulated by isolating the wellbore with a multi-set packer. Pumping down the coiled tubing annulus permits higher pumping rates and allows for better understanding of fracture geometry and dynamics. Our Bulldog Frac sleeve technology features a mechanical shifting sleeve specifically designed for horizontal multistage completions.

The Bulldog Frac sleeve is activated using our proprietary Bulldog Frac BHA, which allows operators to locate, shift open, isolate, and stimulate each stage with the help of a multi-set packer.


  • Proven packer system designed to withstand up to 69,000 kPa (10,000 psi) differential
  • Slim design and improved clearances over the industry standard
  • Integral abrasive perforating tool
  • Active sleeve-locating system
  • Each sleeve provides accurate depth location during the shifting operations
  • Includes two memory gauges, above and below the packer
  • Pinpoint fracture initiation in cemented applications


  • Increased pumping efficiency and rate with slim design
  • No stage count limitations
  • Fullbore design ensures no choking of production
  • Abrasive perforation contingency allows for "on-the-fly" increase to the number of stimulated intervals
  • Compact and lightweight sleeves can be easily handled on the rig floor
  • Uses the deadleg for fracture diagnostics
  • Ability to pump down the coiled tubing to mitigate an impending screen out


  • Completions requiring reliable, single point of entry
  • Formations with a high frequency of screen outs
  • High stage count stimulation designs
  • Wells requiring abrasive perforating
  • Bulldog Frac Bottomhole Assembly (BHA) Data Sheet
  • Bulldog Frac Dual Shift DS Sleeve Data Sheet
  • Bulldog Frac The Dirty Test Sand Endurance Test Flyer
  • Bulldog Frac System ePoster
  • Bulldog Frac Multi-Open/Close (MOC) Sleeve Data Sheet
  • Bulldog Frac Single Open SO Sleeve Data Sheet

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