Downhole Products' EXPAND-O-LIZER ESTD-T (Extreme Service Tear Drop - Taper) is the ultimate engineered solution for under-reamed casing applications. Utilizing the already proven EXPAND-O-LIZER ES unique patented design and now incorporating an offset teardrop taper blade design, the EXPAND-O-LIZER ESTD-T lowers insertion forces and increases blade strength, providing superior standoff in the open hole sections.


  • Single piece, spring steel design
  • Unique design significantly reduces insertion and running forces
  • Integral bi-directional drive collar complete with engineered high holding force set screws
  • Testing criteria surpassing API requirements


  • Centralizer placement/T&D analysis available
  • Dedicated engineering support team
  • Product designed to meet specific application requirements
  • Sizes from 4-­1/2” through 28”

For specifications, application solutions, and EXPAND-O-LIZER ESTD-T availability, please contact your local Downhole Products representative.