U Surface Ram-Type BOP | SLB


Surface ram-type BOP

25K BOP stack in the field

The U BOP is the most widely used ram-type BOP in the world and has our widest bore-size range.

The U BOP is designed to maximize reliability and performance while simplifying maintenance.

  • Hydraulic stud tensioning is available on larger sizes to ensure that stud loading is consistently accurate and even.
  • Bonnet seal carriers eliminate the need for high makeup torque on bonnet studs and nuts.
  • Wedge locks can be interlocked with the BOP operating system using sequence caps to ensure the wedge lock is retracted before applying pressure to open the BOP.
  • Other features include hydraulically opening bonnets, a forged body, and a wide selection of rams to meet a variety of applications.
U Ram-Type BOP 3D Model
Offshore (surface) and onshore
Bore sizes and working pressures
7 1/16, 11, and 13 5/8 in: 3,000 to 15,000 psi
16 3/4 in: 3,000 to 10,000 psi
20 3/4 in: 3,000 psi
21 1/4 in: 2,000, 5000, and 10,000 psi
26 3/4 in: 3,000 psi
Body styles
Single, double, triple, or quad
Lock types
Standard: Manual
Optional: Hydraulic
Hydraulically opening
Available bonnets
Large-bore and FXT
Field-replaceable bonnet cylinders, pistons, and seals

Ram-type BOP