H2 Needle-and-Seat Choke | ProductsSLB

H2

Needle-and-seat choke

With pressure ratings to 15,000 psi, Cameron H2 needle-and-seat chokes handle standard, erosive, and corrosive service.

Available configurations

  • Positive chokes provide a fixed flow condition with a large selection of available bean sizes and types
  • Adjustable chokes provide variable flow rates but can be locked into position if a fixed flow rate is required
  • Combination bean and seat converts the adjustable choke to a positive/adjustable choke for bringing on the well slowly with the adjustable feature.

Once the desired flow rate is reached, the choke can be operated as a positive choke. This reduces wear on the wing or master gate valves because they are not used to control flow. In every application, the H2 choke delivers long life and low maintenance.

Features

  • Externally threaded body
  • Automatic venting of body pressure when you unscrews the bonnet nut one turn
  • Bleed valve allows safely venting the body cavity pressure before removing the bonnet assembly
  • Compliance with API Spec 6A, including performance verification testing for PR-2 choke valves
  • Forged body
  • Easy operation and maintenance
H2 Needle-and-Seat Choke 3D Model

Specifications

Nominal Size, in  Available Needle/Max. Orifice Size, in Pressure Range, psi
2 1 2,000–10,000; 15,000
3 2 2,000–10,000
4 3 2,000–5,000

Material Recommendations

API Material Class  Body Bonnet Choke Trim (Stem, Seat, and Bean)
AA and BB: General service Alloy steel Alloy steel Stainless steel or stainless steel and tungsten carbide
CC: Nonsour, high CO2 Stainless steel Stainless steel Stainless steel or stainless steel and tungsten carbide
DD and EE:  0.5 sour, low CO2 Alloy steel Alloy steel Stainless steel and tungsten carbide
FF: 0.5 sour, high CO2 Stainless steel Stainless steel Stainless steel and tungsten carbide
HH: High H2S, high CO2 Corrosion-resistant alloy Corrosion-resistant alloy
Corrosion-resistant alloy and tungsten carbide

In compliance with NACE Standard MR0175

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