Nonretrievable Chokes | Schlumberger Products

Nonretrievable Chokes

Proven, reliable choice

Nonretrievable choke valve.

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  
Pressure ratings
15,000 psi
Water depths
9,800 ft
Temperatures range
–50 to 350 degF [–46 to 177 degC]
Trim sizes
2–8 in
Controllable Cv
1–1,000
Actuation
Cameron SLCA hydraulic stepping linear choke actuator (3,000- or 5,000-psi supply), RD250 ROV gearbox, or electric actuator
Position feedback
Linear variable differential transformer analog (4 to 20 mA) or digital CANBus
Service life
20 years (excluding wearing trim elements)
Certification
API Specs 6A and 17D, ISO 10423 and 13628-4, NACE MR0175, NORSOK

Model
Description
Nominal Size, in
Max. Working Pressure, psi
Max. Cv
Flow Curve Type
CC30FNR
Gas lift
3
5,000
13.6
Plug and cage, equal percentage
Production
3
5,000
86
Plug and cage, linear
Production
3
5,000
64
Plug and cage, equal percentage
CC40FNR
Production
4
5,000
256
Plug and cage, linear
Production
4
5,000
206
Plug and cage, equal percentage
CC40FNR 10K
Production
4
10,000
256
Plug and cage, linear
Production
4 10,000
206
Plug and cage, equal percentage
CC40FNR HP
Production
4 15,000
130
External sleeve, equal percentage
CC40FNR
Water injection
4
5,000
76
3-in, three-stage, multistage
CC50FNR 10K
Production
5
10,000
428
Plug and cage, linear
CC60FNR
Production
6
5,000
544
Plug and cage, equal percentage
CC80FNR
Production
8
7,500
1,000
Plug and cage, linear

Nominal size refers to the seat nominal diameter, not the inlet or outlet end connection size.

Reduced-capacity and custom trims available.

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