PULSE Ultrasonic Chemical Injection Metering Valves Cimv Overview Brochure
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PULSE
Ultrasonic chemical injection metering valves
Cameron PULSE* ultrasonic chemical injection metering valves (CIMVs)
are remotely operated, ROV-retrievable, self-regulating subsea chemical
injection metering systems. Self regulation is an integral part of all our
CIMV technology and only requires one user-defined input—flow rate—
for the system to monitor and control using onboard closed-loop control.
At the core of each PULSE CIMV is a nonintrusive line-of-sight ultrasonic
flowmeter that reinvents achievable accuracy levels in CIMVs. Use of an
ultrasonic flowmeter is replacing intrusive flow measurement techniques in
other designs, introducing a step change in CIMV technology. The ultrasonic
flowmeter fires an ultrasonic pulse with and against the chemical flow, then
measures the difference in time of flight in both directions.
The ultrasonic flowmeter is combined in closed-loop control with an
electrically actuated throttling valve. Real-time feedback from the ultrasonic
flowmeter is used to autonomously control the throttling valve, indefinitely
maintaining an injection rate set point despite up- and downstream system
disturbances. This technology is particulate tolerant, provides consistent
best-in-class accuracy, and reliably measures chemical inhibitor flow rate
without the need for filtration. It also features a high turndown ratio for
adjustment from minimum to maximum flow combined with a low native
pressure drop.
Insert-retrievable, self-regulating subsea
chemical injection metering valves for
greater accuracy and reliability in low-dose
inhibitor injection and hydrate mitigation
2
Onboard closed-loop control
In automatic mode, the PULSE CIMVs use real-time flow rate feedback in
closed-loop control to adjust the throttling valve and maintain the injection
flow rate irrespective of any disturbance in the upstream and downstream
pressures. For example, in a situation where several CIMVs are tied to a
common chemical supply header, the header pressure may fall as the other
chemical injection valves in the system adjust. If it does, the flow rate
across the throttling valve will also drop. This will, in turn, be registered by
the flowmeter. If the measured flow rate falls outside the adjustable dead
bands, the onboard algorithm will proportionally adjust the throttling valve
to correct the flow rate.
These CIMVs also have manual modes of operation in which the closed-
loop control is suspended and the valve is operated in open-loop control
while an adjustable throttling valve and a flowmeter in series provides flow
rate feedback. Operation of our CIMVs is user friendly with a single user-
defined input—flow rate—and a straightforward user interface combined
with onboard diagnostics for improved monitoring of the system.
Low-, medium- and high-flow CIMVs
The Cameron PULSE LF low-flow ultrasonic CIMV is designed for long-
step-out, deepwater projects with complex system architectures, requiring
subsea distributed injection of chemical inhibitors to address flow
assurance challenges. It provides greater control and accuracy over the
levels of low-dose inhibitors (LDIs) that are added to the flow at lower
capex and opex compared with point-to-point injection.
The technology uses a precision needle valve to regulate the flow through
the system. The needle has an equal-percentage flow curve, providing
exceptional control over a large flow range. It is operated by an electric
actuator, which provides fine system adjustment and is controlled by the
feedback from the microbore nonintrusive line-of-sight ultrasonic flowmeter
via an onboard closed-loop control algorithm.
The PULSE MF medium-flow and HF high-flow ultrasonic CIMVs are
designed for hydrate mitigation and handle the contaminated regenerated
monoethylene glycol (MEG) stream without requiring subsea filtration.
They were developed to further optimize the MEG or methanol distribution
system, reducing the distribution system pressure rating and achieving
significant cost savings.
These CIMVs incorporate a large-bore flowmeter that meters contaminated
MEG and methanol streams up to 7,000 galUS/h [26,500L/h] while still
consistently achieving a high turndown ratio in excess of 130:1. They use a
field-proven multiple orifice valve (MOV) choke trim technology to provide
an erosion-resistant throttling element. The MOV trim consists of two
sintered and hot-isostatic-pressed (HIP) tungsten carbide discs—one fixed,
and the other rotated by a stepper motor via a gear train. Both discs have
specially shaped, extended-range orifices that, when rotated relative to
each other, achieve precise control with a high turndown ratio and fine
system adjustment.
The PULSE CIMV retrievable technology uses onboard diagnostics to
stream back accurate performance data, giving operators a clear picture
of what is happening at the injection point and allowing full inhibition
without overdosing.
3
Designed for injection of LDIs for wax, scale, and corrosion, the PULSE LF CIMV uses a nonintrusive
ultrasonic flowmeter and a microneedle and seat throttling valve in closed-loop control. It has been
engineered to handle flow rates from 0.07 to 159galUS/h [0.25 to 600 L/h] and is retrievable by ROV,
whether mounted in a horizontal or vertical orientation.
Flow measurement
At the core of the PULSE LF CIMV is our patented microbore nonintrusive line-of-sight ultrasonic
flowmeter. The ultrasonic flowmeter has no moving parts and, unlike the Venturi-type flowmeter,
is pressure independent with a low native pressure drop. Flow rate is determined by time-of-flight
measurement of an ultrasonic pulse traveling with and against the chemical flow. This technology
features a high turndown ratio, is particulate tolerant, provides consistent high accuracy of reading,
and reliably measures chemical inhibitor flow rate without the need for subsea filtration.
For redundancy, a secondary method of flow determination is supplied that consists of two pressure
sensors across the throttling valve and a linear variable differential transformer to provide valve
position. This information can be used with trended field data to determine the flow rate.
Throttling valve
The PULSE LF CIMV includes a precision needle valve to regulate the flow through the system.
The needle has an equal-percentage flow curve, providing exceptional control over a large flow range.
It is operated by a precision electric actuator that enables fine system adjustment and is controlled by
the feedback from the ultrasonic flowmeter via the onboard closed-loop control algorithm.
PULSE LF CIMV System Architecture
■ ROV-retrievable, self-regulating metering valve
■ Application: corrosion, scale, wax inhibitors,
and LDIs
■ Flow range of 0.07–159 galUS/h
[0.25–600 L/h]
■ Microbore nonintrusive line-of-sight
ultrasonic flowmeter
■ Accuracy better than ±2% of reading
■ 10,000-psi [68.9-MPa] and 15,000-psi
[103.4-MPa] maximum working pressure
■ 13,123-ft [4,000-m] water depth
■ 154-lbm [70-kg] insert weight in water
■ Vertical or horizontal tree
or manifold mounting
■ CANbus, CiA 443, or Modbus communication
■ Redundant flow measurement system
■ Onboard control and diagnostics
PULSE LF Low-Flow Ultrasonic CIMV
Nonintrusive line-of-sight ultrasonic flowmeter.
Microneedle and seat.
PULSE LF CIMV insert and receptacle.
LOW FLOW CIMV System Architecture
Electronic control module
Pressure sensor
Electrical connector
Flow path
Motor-actuated control valve (with position feedback)
PT
DTM2
ECMUCM
M
PT
DTM
ECM UCM
PT
DTM
M
Ultrasonic control module
Microbore ultrasonic flowmeter
6.35-mm [0.25-in] poppeted
hydraulic coupler
Power/communications signal
INLET OUTLET
4
PULSE LF CIMV 0.07–159 galUS/h [0.25–600 L/h]
Technical Details
Model Remotely operated, ROV-retrievable PULSE LF CIMV
Application LDIs (corrosion, scale, wax, asphaltene, demulsifiers, etc.)
Installation orientation Horizontal or vertical
Design standard API 17D/ISO 13628-4; API 17F/ISO 13628-6
Design life 25 years
Failure mode Fail as is; will continue to inject on loss of power or communication
Pressure rating 10,000 psi [68.9 MPa] or 15,000 psi [103.4 MPa]
Max. differential pressure† 3,500 psi [24.1 MPa] for flow rates < 0.26 galUS/h [1 L/h]
Min. differential pressure†< 50 psi [0.34 MPa] for flow rates up to 26 galUS/h [100 L/h]
< 500 psi [3.45 MPa] for flow rates up to 159 galUS/h [600 L/h]
Hydraulic connection Hunting® RS-4 hydraulic couplers (two off) poppetted with weld tails (size and material per project)
Electrical connection Seven-way electrical connector (OneSubsea Diamould* electric connectors, Siemens Tronic®, Teledyne ODI®, stab and ROV mate options)
Envelope dimensions
Total length Approx. 41.7 in [1,059 mm]
Insert diameter Approx. 10 in [254 mm]
Insert weight Approx. 154 lbm [70 kg] in water, suitable for ROV deployment
ROV lockdown interface API 17H/ISO 13628-8 Class 4
Temperature rating electronics
Storage 0 to 122 degF [–18 to 50 degC]
Operational 23 to 104 degF [–5 to 40 degC]
Working depth 13,123 ft [4,000 m]
Flow range
Standard 0.07–159 galUS/h [0.25–600 L/h]
Turndown 2,400:1
Cleanliness Particulate-tolerant system; recommended SAE AS4059 Class 12 B-F (supplied flushed to SAE AS4059 Class 6 B-F)
Accuracy Better than ±2% of reading above 0.53 galUS/h [2 L/h]
Pressure sensors Two off (used to determine secondary flow)
Additional features Secondary flow system and onboard status indicators (e.g., zero flow, max flow, reverse flow, totalizer, and diagnostics)
Pressure-Containing and Pressure-Controlling Component Materials
Valve trim Nickel alloy 718 and Stellite® 6 stainless steel
Valve body Duplex stainless steel
Valve seals (stem) Polytetrafluoroethylene (PTFE) based stack
Flowmeter 22% chromium duplex body with nickel alloy 718 transducers
Pressure seals Metal-to-metal nickel alloy with elastomeric backups
Electrical Controlling Components
Motor Stepper
Power consumption
Min. 2.2 W (no flow metering); <6W (during flow rate monitoring)
Norm <8.6 W (motor operating)
Max. <14.5 W (at 39.2-degF environment based on full pressure)
Electronics system Housed in 1-atm housing
Interface protocol CANOpen, CiA 443 Version 3, SIIS Level 2 fault-tolerant CANbus, or Modbus
Inrush current < 600 mA for < 500 ms (SIIS Level 2 compliant)
Default bit rate 50 kbps
† Max. and min. differential pressures are based on a 40-cP fluid at minimum and maximum flow rates, respectively, to maintain controllability. Higher or lower differential pressures are possible dependent on flowing conditions.
5
Horizontal installation—insert with stab mate electrical connector and receptacle.
Vertical installation—insert with stab mate electrical connector and receptacle.
PULSE LF CIMV Typical Configurations
6
PULSE LF CIMV Insert and Receptacle Features
ROV bucket
ROV grab handle
Class 4
ROV interface
Hydraulic
coupler (×2)
Stab mate electrical
connector (not part
of CIMV scope
of supply)
Lockdown latch
Lockdown
indication band
Receptacle
tray
Installation
and lockdown
indication bands
Receptacle
mounting
Seven-way
stab mate
electrical
connector
Guide
pin (×2)
Hydraulic
coupler (×2)
Insert
alignment
key (×2) Protective skirt
Receptacle
guide funnel
Lockdown latch
guide and slot
Hydraulic coupler
weld tail (×2)
7
The PULSE MF CIMV is designed for injection of MEG and methanol as part of a subsea hydrate
mitigation strategy. It handles the contaminated regenerated MEG stream. At the heart of the PULSE
MF and HF CIMVs is our patented nonintrusive line-of-sight ultrasonic flowmeter, developed with our
advanced ultrasonic time-of-flight technology. The robust nonintrusive particulate-tolerant nature of
the medium- and high-flow CIMVs means that no subsea filtration of the MEG or methanol is required.
Flow measurement
The large-diameter, nonintrusive line-of-sight ultrasonic flowmeter at the heart of the PULSE MF
CIMV fires an ultrasonic pulse with and against the flow, measuring the difference in time of flight
in both directions. The ∆T measured is the speed of the fluid, allowing the flow rate to be accurately
calculated.
As with the PULSE LF CIMV, a secondary flow determination system is supplied that consists of two
pressure sensors across the throttling valve and a rotary position sensor to provide valve position.
Processing at the system level can then be used to convert this data to flow rates via a table of trended
field data.
Throttling valve
The PULSE MF and HF CIMVs use a field-proven MOV choke trim technology to provide an erosion-
resistant throttling element. The MOV trim consists of two sintered and HIP tungsten carbide discs—
one fixed and the other rotated by a stepper motor via a gear train. Both discs have specially shaped,
extended-range orifices that, when rotated relative to each other, easily achieve a turndown ratio in
excess of 137:1 with fine system adjustment.
PULSE MF CIMV System Architecture
PULSE MF Medium-Flow Ultrasonic CIMV
■ Insert-retrievable, self-regulating
metering valve
■ Application: hydrate mitigation (regenerated
MEG and methanol)
■ Flow range from 21 to 2,906+ galUS/h
[80 to 11,000+ L/h]
■ 1-in [25.4-mm] poppeted
or poppetless couplers
■ Patented large-bore, nonintrusive
line-of-sight flowmeter
■ Accuracy better than ±3%
of reading
■ 10,000-psi [68.9-MPa] maximum
working pressure
■ 10,000-ft [3,048-m] water depth
■ Insert weight approx. 551 lbm [250 kg]
in water
■ Vertical mounting on tree or manifold
■ CANbus, CiA 443, or Modbus communication
■ Redundant flow measurement system
■ Onboard control and diagnostics
MEDIUM FLOW CIMV System Architecture
Electronic control module
Pressure sensor
Electrical connector
Flow path
Motor-actuated control valve (with position feedback)
PT
DTM2
ECMUCM
M
PT
DTM
ECM UCM
PT
DTM
M
Ultrasonic control module
Ultrasonic flowmeter
25.4-mm [1-in] nominal poppeted
hydraulic coupler
Power/communications signal
INLET OUTLET
Ultrasonic transducer
Ultrasonic signal
Ultrasonic transducer
Flow
PULSE MF CIMV insert and receptacle.
8
PULSE MF CIMV 21–2,906+ galUS/h [80–11,000+ L/h]
Technical Details
Model Cameron remotely operated, insert-retrievable PULSE MF CIMV
Application MEG, regenerated MEG, and methanol dosing
Installation orientation Vertical
Design standard API 17D/ISO 13628-4; API 17F/ISO 13628-6
Design life 25 years
Failure mode Fail as is; will continue to inject on loss of power or communication
Pressure rating 10,000 psi [68.9 MPa]
Optional 15,000 psi [103.4 MPa]
Max. differential pressure†3,500 psi [24.1 MPa]
Min. differential pressure†< 150 psi [1.03 MPa]
Hydraulic connection 1-in [25.4-mm] Hunting RS-16 hydraulic couplers (two off) poppeted or nonpoppeted with weld tails (size and material as per project)
Electrical connection Seven-way electrical connector (OneSubsea Diamould, Siemens Tronic, Teledyne ODI, stab and ROV mate options)
Envelope dimensions
Total length Approx. 44.9 in [1,141 mm]
Insert diameter Approx. 10 in [254 mm]
Insert weight Approx. 551 lbm [250 kg] in water, suitable for ROV deployment with buoyancy or wireline
ROV lockdown interface API 17H/ISO 13628-8 Class 4
Electronics temperature rating
Storage 0 to 122 degF [–18 to 50 degC]
Operational 23 to 104 degF [–5 to 40 degC]
Working depth 10,000 ft [3,048 m]
Filter None required
Flow range 21–2,906+ galUS/h [80–11,000+ L/h]
Turndown: 137:1
Cleanliness No filtration necessary; particulate-tolerant design with large throughbores, nonintrusive flowmeter, and erosion-resistant choke trim technology
Accuracy Better than ±3% of reading over entire flow range
Pressure sensors Two off (used for secondary flow measurement)
Additional features Secondary flow determination system and onboard status indicators (e.g., zero flow, max flow, reverse flow, flow totalizer, and diagnostics)
Pressure-Containing and Pressure-Controlling Component Materials
Valve trim Nickel alloy 718 and tungsten carbide with tungsten carbide wear sleeve
Valve body Duplex stainless steel
Valve seals (stem) Spring-energized PTFE seal
Flowmeter Nickel alloy 625
Pressure seals Metal-to-metal nickel alloy with inert elastomeric backups
Electrical Controlling Components
Motor High-efficiency stepper
Power consumption
Minimum < 4 watts (quiescent)
Normal 9.6 watts (motor operating)
Maximum < 12 watts (at 39 degF [4 degC] and full 10,000-psi [68.9-MPa] pressure)
Electronics system Housed in 1-atm housing
Interface protocol CANOpen, CiA 443 Ver 3, SIIS Level 2 fault-tolerant CANbus, or Modbus
Inrush current < 600 mA for < 500 ms (SIIS Level 2 compliant)
Default bit rate 50 kbps
† Max. and min. differential pressures are based on a 25-cP fluid at minimum and maximum flow rates, respectively, to maintain controllability. Higher or lower differential pressures are possible dependent on flowing conditions.
9
CIMV insert and receptacle assembly. CIMV receptacle. CIMV insert.
PULSE MF CIMV Insert and Receptacle Features
Lockdown
mechanism
Alignment key
Stab mate
electrical connector
Couplers (×2)
Pressure-balanced
insert housing
10
11
PULSE HF High-Flow Ultrasonic CIMV
Developed for the ultrahigh-flow MEG and methanol requirements of large gas projects, and
effective during startup and continuous hydrate inhibition, the Cameron PULSE HF CIMV is
designed for a flow range of from 42 to 7,000galUS/h [160 to 26,500 L/h] and tested in excess
of 7,925 galUS/h [30,000 L/h]. Even at these ultrahigh design flow rates, the large-diameter
nominal throughbore in the PULSE HF CIMV results in average erosion velocities below the API
recommendation and, with a tungsten carbide throttling element based on the field-proven MOV
choke trim technology, risk of trim erosion is greatly reduced.
The large-throughbore, nonintrusive line-of-sight ultrasonic flowmeter also results in an inherently
low-pressure-drop device, with minimal pressure head above the injection pressure required.
For example, with the valve set at 80% open, a pressure drop of only 100 psi [0.69 MPa] is
required to inject fluid at 6,604 galUS/h [25,000 L/h].
0
3,000
10,000
15,000
20,000
25,000
30,000
0 10 20 30 40 50 60 70 80 90 100
Flow rate, L/h
Valve position, % open
Flow rate vs. valve position for 25 cP regenerated MEG (curves of constant DP)
110.3 bar [1,600 psi] (extrapolated)
55.2 bar [800 psi]
27.6 bar [400 psi]
13.8 bar [200 psi]
6.9 bar [100 psi]
HIGH FLOW CIMV System Architecture
Electronic control module
Pressure sensor
Electrical connector
Flow path
Motor-actuated control valve (with position feedback)
PT
DTM2
ECMUCM
M
PT
DTM
ECM UCM
PT
DTM
M
Ultrasonic control module
Ultrasonic owmeter
38-mm [1.5-in] nominal hydraulic coupler
Power/communications signal
INLET OUTLET
PULSE HF CIMV System Architecture
■ Insert-retrievable, self-regulating metering valve
■ Application: hydrate mitigation
(regenerated MEG and methanol)
■ Flow range of 42 to 7,000+ galUS/h
[160 to 26,500+ L/h]
■ 1.5-in [38.1-mm] nominal throughbore coupler
■ Ultralow pressure drop
■ Patented large-bore, nonintrusive line-of-sight
ultrasonic flowmeter
■ Accuracy better than ±3% of reading
■ 10,000-psi [68.9-MPa] MWP
■ 10,000-ft [3,048-m] water depth
■ Insert weight approx. 551 lbm [250 kg] in water
■ Vertical mounting on tree or manifold
■ CANbus, CiA 443, or Modbus communication
■ Redundant flow measurement system
■ Onboard control and diagnostics
PULSE HF CIMV insert and receptacle.
12
PULSE HF CIMV 42–7,000+ galUS/h [160–26,500+ L/h]
Technical Details
Model Cameron remotely operated, insert-retrievable, PULSE HF CIMV
Application MEG, regenerated MEG, and methanol dosing
Installation orientation Vertical
Design standard API 17D/ISO 13628-4, API 17F/ISO 13628-6
Design life 25 years
Failure mode Fail as is; will continue to inject on loss of power or communication
Pressure rating 10,000 psi [68.9 MPa]
Optional 15,000 psi [103.4 MPa]
Max. differential pressure†3,500 psi [24.1 MPa]
Min. differential pressure†<100 psi [0.69 MPa]
Hydraulic connection 1.45-in [37-mm] nominal throughbore; nonpoppeted couplers with metal-to-metal sealing
Electrical connection Seven-way electrical connector (OneSubsea Diamould, Siemens Tronic, Teledyne ODI, stab and ROV mate options)
Envelope dimensions
Total length Approx. 69 in [1,753 mm]
Insert diameter Approx. 10 in [254 mm]
Insert weight Approx. 551 lbm [250 kg] in water, suitable for ROV deployment with buoyancy or wireline
ROV lockdown interface API 17H/ISO 13628-8 Class 4
Temperature rating electronics
Storage 0 to 122 degF [–18 to 50 degC]
Operational 23 to 104 degF [–5 to 40 degC]
Working depth 10,000 ft [3,048 m]
Filter None required
Flow range 42–7,000+ galUS/h [160–26,500+ L/h]
Turndown: 165:1
Cleanliness No filtration necessary; particulate-tolerant design with large throughbores, nonintrusive flowmeter, and erosion-resistant choke trim technology
Accuracy Better than ± 3% of reading over entire flow range
Pressure sensors Two off (used for secondary flow measurement)
Additional features Secondary flow determination system and onboard status indicators (e.g., zero flow, max flow, reverse flow, flow totalizer, and diagnostics)
Pressure-Containing and Pressure-Controlling Component Materials
Valve trim Nickel alloy 718 and tungsten carbide with tungsten carbide wear sleeve
Valve body Duplex stainless steel
Valve seals (stem) Spring-energized PFTE seal
Flowmeter Nickel alloy 625
Pressure seals Metal-to-metal nickel alloy with inert elastomeric backups
Electrical Controlling Components
Motor High-efficiency stepper
Power consumption
Minimum < 4 watts (quiescent)
Normal 9.6 watts (motor operating)
Maximum < 12 watts (at 39 degF [4 degC] and full 10,000-psi [68.9-MPa] pressure)
Electronics system Housed in 1-atm housing
Interface protocol CANOpen, CiA 443 Ver. 3, SIIS Level 2 fault-tolerant CANbus, or Modbus
Inrush current < 600 mA for < 500 ms (SIIS Level 2 compliant)
Default bit rate 50 kbps
† Max. and min. differential pressures are based on a 25-cP fluid at minimum and maximum flow rates, respectively, to maintain controllability. Higher or lower differential pressures are possible dependent on flowing conditions.
13
PULSE HF CIMV Insert and Receptacle Features
Alignment
indication band
Insert alignment key
Guide pin hole
Coupler inlet
and outlet
Electrical connector
(not part of CIMV
scope of supply)
Class 4
ROV interface
Hinged lifting handle
ROV bucket
Dog-in-window lockdown
Pressure-balanced
insert housing
CIMV manifold
Protective skirt
for connectors
Insert
alignment key
Receptacle
block
Receptacle
alignment keyway
Insert alignment
indication
Receptacle
housing
Flange
connection
Receptacle
guide funnel
Seven-pin
electrical connector
Stab coupler inlet
and outlet Four tapped holes for
receptacle mounting
Guide pin
14
Nonretrievable PULSE HF and MF CIMVs
Our PULSE HF and MF CIMV technologies are also available in a nonretrievable unit, providing a
smaller, lighter unit that is suited to applications in flow control modules or other subsea retrievable
packages. Manufactured from a single duplex manifold, the nonretrievable technologies use the same
internals as the retrievable versions and can be mounted either vertically or horizontally.
Specification
Process connections (studded) 1⁄-in [46-mm] API 10K or 2-in [50.8-mm] SPO® Compact flange
Weight (in water) Approx. 440 lbm [200 kg]
Size (height × diameter) 32.5 in × 10 in [825.5 mm × 254 mm]
Pressure rating 10,000 psi [68.9 MPa]
Depth rating 10,000 ft [3,048 m]
Electrical interface Four-pin OneSubsea Diamould, Siemens Tronic, Teledyne ODI,
diver connector with 4.9-ft- [1.5-m-] long jumper
Mounting Vertical or horizontal; fixing points provided in top and base
■ Fixed-mounted, self-regulating metering valve
■ Application: hydrate mitigation (regenerated MEG and methanol)
■ Flow range from 21 to 2,906 galUS/h or 42 to 7,000+ galUS/h
[80 to 11,000 L/h or 160 to 26,500+ L/h]
■ Ultralow pressure drop
■ Studded inlet and outlet
■ Patented nonintrusive ultrasonic flowmeter
■ Accuracy better than ±3% of reading
■ 10,000-psi [68.9-MPa] MWP
■ 10,000-ft [3,048-m] water depth
■ Vertical or horizontal mounting on tree or manifold
■ CANbus, CiA 443, or Modbus communication
■ Redundant flow determination system
■ Onboard control and diagnostics
15
Ancillary Equipment
Cameron has developed a complete suite of ancillary equipment to support the operator and subsea
production system equipment supplier with every aspect of the supply, installation, commissioning,
and aftermarket support for this equipment.
Simulators
The PULSE CIMV simulator facilitates testing of the subsea control module and the electrical and
software interfaces. The simulator has the same electrical behavior as the actual PULSE CIMV.
The software and interface modules of the simulator are identical to the ones that run on the
PULSE CIMV. The simulator has the capability to adjust the pressure values and flow rates as well as
simulate multiple fault modes and operating conditions, as implemented in the metering valve.
Flushing insert and long-term protective cap
This item is an ROV- or wireline-deployed insert module, consisting of the lock-down mechanisms
and hydraulic couplers that allow flow between the inlet and outlet coupler, i.e., the operator can
inject chemicals subsea, but only unmetered. This same item can be used as a long-term protective
cap while the tree is installed subsea without the PULSE CIMV insert installed; for flushing of the
chemical lines between the stab plates and the tree valve block during factory acceptance tests,
site integrating tests, and later in the field where the CIMV insert is not installed; or as a short-term
protective cap during changeout operation subsea.
Additional CIMV receptacle
Additional receptacles can be affixed to the subsea tree or manifold during fabrication and connected
directly to the chemical lines for future chemicals. The receptacles are offered in horizontal and
vertical mounting arrangements and contain lock-down interface and hydraulic couplers for connection
to the chemical lines. For a stab-mate electrical connector configuration, the mating half of the
electrical connector is supplied by the control system supplier and mounted to the receptacle during
tree build.
Ship and test skids
Cameron provides a full range of CIMV insert ship and test skids for low-, medium- and high-flow
units. The skid can be supplied with hydraulic and electrical interfaces to test the CIMV inserts before
deployment. Portable electronic test units with power supplies and test interface software can also
be supplied.
Simulator.
PULSE HF CIMV flushing insert (left) and
PULSE MF CIMV receptacle (right).
PULSE MF CIMV insert
ship and test skid.
16
Microbore Nonintrusive
Line-of-Sight Ultrasonic Flowmeter
Chemical flow path through
ultrasonic flowmeter.
Outlet body
and transducer
Flowmeter pipe
Inlet body
and transducer
Fluid inlet
coupler
Chemical flow path through
throttling valve.
Stepper motor
Drive train
Microneedle
and seat valve
Fluid outlet
coupler
Valve body
Flowmeter applications extend to low flow
Nonintrusive line-of-sight ultrasonic flowmeters were introduced in 2010 in our medium- and
high-flow CIMVs for hydrate mitigation using regenerated MEG and methanol injection. Ultrasonic
flowmeter technology was selected for this application based on its particulate tolerance, its ability
to handle contaminated flow streams, a high turndown ratio, accuracy, and low native pressure
drop. Other types of CIMV flow measurement technologies are particulate sensitive and experience
blockages and measurement inaccuracy in these applications. What emerged from operator
participation in our R&D program is a field-proven technology for medium- and high-flow chemical
injection for hydrate management, operating on deepwater large-bore gas wells across the globe.
Cameron launched a microbore nonintrusive line-of-sight ultrasonic flowmeter development program
for LDIs based on a growing operator need for reliable and accurate subsea distributed chemical
injection. In development for several years, the microbore ultrasonic flowmeter was subjected to
extensive qualification testing in terms of pressure, temperature, vibration, electronic reliability, and
characterization of the flow across its full pressure and flow rate range with varying fluid properties
to confirm its industry-leading accuracy and repeatability across the entire range. The microbore
ultrasonic flowmeter accuracy is better than ±2% of reading, whereas the conventional Venturi-type
flowmeter accuracy can range from 5% to 10% full scale.
The outcome of this development is the introduction of the PULSE LF CIMV. The patented ultrasonic
flowmeters, now across our complete CIMV product family, offer the following advantages:
■ Nonintrusive flow measurement with no moving parts maximizes long-term reliability
of the subsea chemical injection system
■ Debris tolerance with no risk of flowmeter blockage combined with a self-flushing throttling valve
■ Very high turndown ratio from maximum to minimum flow rate measurement, allowing one CIMV
model to cover a wide range of applications
■ Pressure-independent flow measurement with low native pressure drop for optimized chemical
distribution systems and high-pressure applications
■ Insensitivity to chemical properties enables operators to make chemical decisions independent
of installed hardware.
How it works
The microbore ultrasonic flowmeter used in the PULSE LF CIMV and the large-bore ultrasonic
flowmeter used in the PULSE MF and HF CIMVs are line-of-sight meters with an ultrasonic transducer
at either end of the metering path. An ultrasonic pulse is transmitted through the fluid from either
transducer with and against the flow direction. The difference in time of flight of the sound pulses in
either direction (∆T) is accurately measured by the onboard ultrasonic control module (UCM). From
that ∆T measurement, flow rate of the chemical passing through the flowmeter is calculated. The
flowmeter is combined with an electrically actuated throttling valve in closed-loop control. Flow rate
monitoring and valve actuation via the onboard closed-loop control algorithm, along with external
communications, are managed by the electronic control module (ECM) that streams back operational
performance data to the operator via the master control station. Real-time feedback from the
flowmeter is used to autonomously control the throttling valve, maintaining a user-defined injection
rate set point indefinitely regardless of up- or downstream system disturbances.
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Premier Manufacturing
Cameron PULSE CIMV and subsea choke facility in Longford, Ireland.
The Cameron PULSE CIMV and subsea choke facility in Longford, Ireland,
has global responsibility for the design and manufacture of all subsea
chokes and intervention tooling, as well as subsea CIMV technologies.
This plant is equipped with sophisticated machine tools and flow control
technology, including computer numeric control machining centers;
fabrication and weld-cladding stations; hydrotest bays; TV-monitored
hydrostatic and gas test facilities rated to 30,000 psi [206.8 MPa];
hyperbaric and environmental test chambers; advanced nondestructive
examination capabilities, including X-ray, ultrasonic testing, and positive
material identification; and a semiautomated blast-and-paint facility.
The Cameron in-house R&D group works hand-in-hand with sales and
marketing teams worldwide, with further support provided by Cameron
Services locations. Wherever you need us, we’re already there.
Cameron has developed a complete suite of ancillary equipment to support
the operator and SPS equipment supplier with every aspect of the supply,
installation commissioning, and aftermarket support for this equipment.
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