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GB CD Drilling with Casing Connection

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GB 3P (Original Design) – Designed for deep-stabbing, no cross-threading, and quick makeup in 5 to 6 turns

GB 3P (Original Design)

GB 3 Pitch, Large OD, Deep Stab, No Cross Thread Connection. This connection has high torque capacity and is suitable for circulating and light duty rotation to aid target achievement. Internal shoulder for heavier wall casing.


  • Running Standard Large OD Downhole Casing Applications
  • Rotating To aid string advancement
  • Drilling with Casing / Drilling with Liners
  • Driving


Specialty semi-premium connection machined from API Coupling Stock providing a low-cost Drilling with Casing/Drilling with Liner Connection. The GB CD Connection performances exceed that of standard API connections. Connection designed with refined API BTC Threads and will make up with off-the-shelf API BTC threaded accessories.

Innovative, multiple taper buttress thread design (box only) reduces localized bearing stresses in critical areas for improved fatigue resistance. Pin noses meet in the center for positive indication of proper field makeup. Pin noses, designed for maximum bearing face area, provide high torque resistance.


  • Uses GB 3P threads.
  • Easy-stabbing
  • fast makeup without cross-threading.
  • Meets API Coupling OD and Drift Diameter Specifications.
  • Field proven in a variety of static and dynamic applications.
  • Excellent make/break repeatability under field conditions.
  • Enhanced fatigue life.
  • Heavy cross-section at center of coupling provides hoop stability for enhanced leak resistance and reduced jump-out potential.
  • Can be inspected with standard API Thread Gauges by any properly trained/experienced Third Party.
  • Positive makeup indication with pin nose engagement in center of connection.
  • Also has API Triangle Stamp on Pin for secondary makeup verification.
  • Innovative Multiple Taper Design reduces localized bearing stresses for enhanced fatigue resistance and reduced galling potential.
  • High Torque resistance.


  • Casing sizes 16″ OD to 20″ OD.
  • All API Casing Grades and 16″ OD through 20″ OD Line Pipe; Grades X-56 and X-80.

Running Procedures


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