MB-4

13-5/8″ Internal Latch Multi-Bowl

Wellhead System

MB-4

13-5/8″ Internal Latch Multi-Bowl

Wellhead System

Eliminate lock screws, minimize potential leak paths and reduce costs.

The MB-4 is our most flexible wellhead system featuring an internal latch ring, a detachable flange and an optional quick connect all within a compact, single-body design. Hangers and packoffs are designed to minimize “tilt,” ensuring ease of packoff installation and retrieval in a highly deviated well. Advanced surface treatments are used to ensure reliability of running tools even under the most demanding conditions. The MB-4 is designed to be customizable to suit your drilling needs.

Why Choose a Downing MB-4 Wellhead System?

Improve Safety

  • Lock screw leak paths eliminated
  • Employees spend less time under rig floor

Minimize Downtime & Costs

  • Quick Connector saves up to 1 hour per BOP rig up/down cycle
  • Fewer makeup/breakout cycles 
  • Reduced rig up/downs and BOP testing
  • Less time waiting on cement and casing cutting processes
  • Realized total time savings exceeding 24 hours per well vs conventional wellhead systems

Improve Efficiencies

  • Run, land and install housing through the rig floor

Application:

  • 3+ Casing Strings
  • Multi & Single Well Pads

Key Features: 

  • Unitized design reduces height
  • Optional quick connect, ideal for batch/pad drilling
  • No lock screws below the tubing head
  • Threaded on 13-5/8” 5K & 10K API OEC flanges
  • Nested 11” bowl accommodates standard C-22 style slip hanger
  • Robust FS, S, and Dovetail seals used in packoff assemblies
  • Enhanced cementing operations with fluted mandrel hangers
  • Variety of configurations available
  • Pressure Ratings: 5,000, 10,000 psi
  • Temp Ratings: P + U (-20°F to +250°F)