Hydril Annu-Flex

Redefining your BOP Reliability

A variation of our GX annular BOP, Hydril's Annu-Flex combines either a single or dual subsea annular blowout preventer with a maintenance-free, flexible underwater riser joint. Together, the BOP head/flex joint combination reduces overall stack height and requires fewer stack connections. Additionally, the Annu-Flex offers rapid and economical maintenance, simple and reliable operations, and long service life. These benefits can be attributed to its distinctive design and distinguishing features which include:

  • A flex joint design that eliminates friction that causes binding and galling as well as the need for lubrication and pressure compensation commonly found in ball-type designs.
  • An elastomer element, the key component of the subsea flexible joint, is permanently bonded to an inner housing and outer ring.
  • A guide ring/wear bushing absorbs through-the-bore wear during normal operations to protect the elastomer element and the main housing.
  • A housing/latched head to retain full working pressure rating.

Selected Engineering Data*

Annu-Flex Annular BOP
Designation  
Bore Size (inches) 18-3/4
Working pressure (psi) 10,000
Hydraulic Operating Pressure (psi) 1,500
Gal. to Close (U.S. gal.) 58
Gal. to Open (U.S. gal.) 58
Clearance Diameter (inches) 84
Weight (lbs) 121,539
Length (inches) 240
Flex Joint
Designation  
Rated Working Pressure 2,000 psi
Maximum Tension 2 million lb
Bending Moment 20,000 ft-lb/°
Flex from vertical 10°

* See brochure for additional data

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