Overview

Cameron’s first nonretrievable subsea choke was installed in 1975, and with more than 800 of these rugged chokes installed to date, they continue to demonstrate that they are a proven, reliable choice. 

Permanently mounted to a subsea structure such as a Christmas tree or manifold, our subsea choke body can also be incorporated into a retrievable flow control module or choke bridge, which can house flowmeters and instrumentation devices. To maintain or replace the choke or trim, the flow control module or choke bridge is retrieved. These Cameron chokes are usually fitted with a hydraulic stepping or stand-alone DC electric actuator, but can also be adjusted by an ROV or diver.

Specifications

Cameron’s non-retrievable subsea choke design features:

  • Pressure ratings to 15,000 psi
  • Water depths to 9800 ft (3000 m)
  • Temperature ranges from -50° F to 350° F (-46° C to 177° C)
  • Trim sizes from 2" through 8", with controllable Cv from less than 1 up to 1000
  • Actuation – Cameron’s SLCA™ hydraulic stepping linear choke actuator, RD250 ROV gearbox, or an electric actuator
  • Position feedback – Linear variable differential transformer (LVDT) analog (4 mA to 20 mA) or digital CANBus
  • Designed for 20 years of service life, excluding wearing trim elements
  • Meets or exceeds API 6A/17D, ISO 10423/13628-4, NACE MR-01-75/ISO 15156, and NORSOK requirements


Subsea Non-Retrievable Choke Summary 

 Choke   Description   Nom. Size*   MWP psi   Max. Cv**   Flow Curve Type
 CC30FNR
 Non-Retrievable Choke – Gas Lift 
 3"
 5000 
 13.6 
 P&C EQ%
 CC30FNR 
 Non-Retrievable Choke – Production 
 3"
 5000
 86
 P&C Linear
 CC30FNR 
 Non-Retrievable Choke – Production 
 3"
 5000
 64
 P&C EQ%
 CC40FNR 
 Non-Retrievable Choke – Production 
 4"
 5000
 256
 P&C Linear
 CC40FNR 
 Non-Retrievable Choke – Production 
 4"
 5000
 206
 P&C EQ%
 CC40FNR 10k 
 Non-Retrievable Choke – Production 
 4" 
 10,000
 256
 P&C Linear
 CC40FNR 10k
 Non-Retrievable Choke – Production
 4"
 10,000
 206
 P&C EQ%
 CC40FNR HP 
 Non-Retrievable Choke – Production 
 4"
 15,000 
 130 
 ES EQ%
 CC40FNR 
 Non-Retrievable Choke – Water Injection 
 4"
 5000 
 76 
 MS33
 CC50FNR 10k 
 Non-Retrievable Choke – Production 
 5"
 10,000 
 428 
 P&C Linear
 CC60FNR 
 Non-Retrievable Choke – Production 
 6"
 5000 
 544 
 P&C EQ%
 CC80FNR
 Non-Retrievable Choke – Production
 8"
 7500
 1000
 P&C Linear

* Nom. Size refers to the seat nominal diameter, not the inlet or outlet end connection size.

** Reduced capacity and custom trims available.


P&C = Plug and Cage

ES = External Sleeve

EQ% = Equal Percentage

MS33 = 3", Three-Stage, Multistage