• True 13 5/8" OD Connection using the buttress threadform on a 1 1/2 inch per foot taper. Like the GB Riser, the GB T3 Connection was designed for dual use as a drilling riser connection followed by down hole service. This connection is unique as it is run full cross-section for riser service and then special clearance for down-hole service. Connections are turned-down on the pipe after retrieval and inspection.

Features

• Resistant to long-term, low-level fatigue loading as demonstrated by several series of full-scale, 4-point, cyclic bending tests.
  
  
• Twin cantilever design reinforces the coupling limiting expansion and distortion from make-up, reducing assembly pre-stresses, and minimizing thread galling.
  
  
• Uses standard API and MRP gauges and procedures for inspection.
  
  
• Makes up to an internal torque shoulder at a with a minimum torque of 30,000 ft-lbs. and has API triangle stamp for secondary make-up verification on the rig. 
  
  
• 100% joint efficient under all load combinations. Will not jump out (or in) in high angle build sections common in directional drilling. 
  
  
• Maintains pressure integrity when special clearance.

  Options

• Special Clearance OD (SC): Specify GB 3T SC when ordering. See Data Sheets for minimum special clearance OD and associated properties.

• GB T3 Connections are available for 13 5/8" OD, 88.20#, P-110 casing. Can be adapted to 9 7/8" and 11 7/8" OD or any casing with wall thickness of 0.625" or greater.