Wellhead Allocation Assembly

The Wellhead Allocation Assembly is skid mounted, with three phase operation to measure and recombine water, oil and gas to transport to a central gathering facility. Available in 36 OD x 10’-0" s/s x 1440# horizontal bucket and weir style.

Key Benefits

  • Expedited production drawings available as early as 4-5 business days for faster planning
  • Single well or multi well designs available along with full pad well designs
  • Robust skid design and commitment to service help bring operations online quickly
  • Cost-effective maintenance
  • Installation and commissioning of the units to facilitate and speed startup
  • Industry-leading delivery to speed startup

How it Works

The production stream first encounters the inlet deflector, which causes initial separation of gas from liquid. The heavier liquid descends while the gas rises. In the second stage the stream slows even further and the larger liquid particles fall from the gas. Next the mist extractor captures smaller liquid particles entrained in the gas. Liquids exit the bottom of the vessel and the natural gas exits the top.

The gas exits the separator through a senior orifice fitting with back pressure control and piped to skid edge. The oil and water outlet exits the separator through separate control valves and turbine meters. The gas and liquids can be piped separately or comingled.

Standard Features & Options

Standard Features

  • Fully NACE (MR-O175) compliant
  • Senior orifice fitting
  • Oil and water turbine meters
  • High and low level switch bridles
  • Gas back pressure valve
  • Full flow pressure relief valve
  • Sight glass/level gauges with gauge cock
  • Liquid level controllers
  • Pressure indicator
  • Temperature indicator connection
  • Instrument gas supply drip pots with piping manifold
  • High and low pressure regulators
  • Lifting lugs for safe handling
  • ASME standards in design and construction
  • Skid mounted assembly


  • API 14C rated
  • Coriolis Liquid Meters
  • Manway
  • Carbide trim
  • Paint System
  • Customization to meet additional specifications