Weatherford Flow Meters

8/12/2019 Weatherford Flow Meters

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Accurate, real-time, multiphase owmetering

mpletion

oduction

ervention

Drilling

aluation Production optimization

Articial lift

Control systems

Flow measurement Custom measurement solutions Multiphase water-cut meter Real-time well testing systems Water-cut meters Wet-gas, modular multiphase meters

Reservoir monitoring

Software

Subsea production

Alpha VSRD MultiphaseFlowmeter



© 2010 Weatherford. All rights reserved.2

Weatherford’s Alpha VSRD is a technological breakthrough in

multiphase metering that offers improved accuracy and simplied

operation compared to other products on the market. By combining

traditional Venturi and gamma densitometer technologies with

Weatherford’s innovative sonar and Red Eye® technologies, the Alpha

VSRD excels where other multiphase meters fall short. These key

technologies improve ow-rate measurements and dramatically reduce

sensitivity to varying uid properties thereby eliminating the need for

frequent recalibrations. For trouble-free wellhead ow measurement or

separator replacement, the Alpha VSRD multiphase owmeter is the

right solution.

Applications

• Individual well monitoring. The Alpha VSRD owmeter provides a

cost-effective means of tracking real-time hydrocarbon production data

from each well.

• Test separator replacement. The compact Alpha VSRD multiphase

owmeter is an ideal replacement for bulky test separators, especially

for high-pressure or corrosive well streams. Furthermore, because

there is no need for purging, well tests can be performed in less time,

which translates into more frequent tests of your critical assets.• Wet gas or multiphase. Unlike other multiphase meters that cannot

operate on high gas wells, the Alpha VSRD meter handles any gas/

liquid ratio. It is a wet-gas and multiphase meter in one. This feature

is key for slugging wells that uctuate between gas-dominant and

liquid-dominant ow regimes.

Multiphase metering technology offers improved

accuracy and simplied operation.



© 2010 Weatherford. All rights reserved. 3

Alpha VSRD Multiphase Flowmeter

Modbus is a registered trademark of Schneider Automation Inc.

Features

The Alpha VSRD owmeter is fully integrated. The ow computer maintains all

uid and set-up parameters and reports real-time oil, water and gas rates, as well

as produced volumes at line or standard conditions. The data are available on the

touch pad display and via MODBUS®. Low power consumption and high ambient

temperature rating make it suitable for solar panel power and desert applications.

The meter also includes remote pressure seals on the meter body to reduce the

chance of plugging. It is designed for Class I, Zone 1 hazardous locations.

• Cost effective

• Robust

• Large turndown (ratio of maximum-to-minimum ow rate) up to 10:1

• Broad operating envelope

• 2- to 10-in. line sizes




Principle of operation

Alpha VSRD is based on an extended-throat Venturi meter, a sonar owmeter,

a Red Eye® MP water-cut meter and a gamma densitometer. This combination

of technologies has a wide operating envelope and offers maximum accuracy in

wet-gas and liquid-dominant multiphase streams.

The sonar owmeter measures the convection of turbulent vortices using an

array of dynamic strain sensors. Sonar has the unique capability to measure total

ow rate accurately over an extremely wide range of Reynolds numbers (ow

rate, uid types) with a negligible overreading in wet-gas ows. Overreading is

the ratio of apparent ow rate to the actual ow rate.

The Venturi owmeter is based on the measurement of static pressure drop

across a converging pipe section. The pressure drop is proportional to the

increase in kinetic energy of the ow stream, that is conservation of momentum.

The Red Eye MP water-cut meter is a lter spectrometer that employs the

principle of near-infrared absorption to measure water content in a liquid or

multiphase stream. The meter reports accurate water cut independent of ow

regime, ow rates, water salinity and hydrate inhibitors.

The gamma densitometer uses a small radioactive source and measures the

attenuation across the process pipe. The attenuation provides a measure of the

gas and liquid content (gas void fraction) in the pipe.

The Alpha VSRD combines these four technologies for a robust, full-range

multiphase owmeter for the measurement of gas, oil/condensate and water rates.

Venturi

Flowmeter

Sonar

Flowmeter

Gamma

Densitometer

Red Eye MP

Water-Cut Meter

Flow Calculations

Qt = f(∆P, VS, FP, G)

QI = f(p, FP)

Qg= f(p, FP)

FP = Fluid Properties

G = Geometry

Qo = (1 - WLR) x QI

Qw = WLR x QI

PVT Fluid

Properties

Pressure

Temperature

P, T

∆P

Velocity

Water Cut

Liquid

and gas

flow

rates

Qo

Qw

Qg

Density

Sensor processing ow diagram





Specications

Operating

Supply voltage 11 to 30 VDC

Power requirement < 30 W

Communications interface RS485 Modbus

Process temperature, °F (°C)1 -4 to 185 (-20 to 85)

Communications

Host port RS485 serial port supports MODBUS protocol only

Local display, in. (cm) 6 (15.24) color touchscreen

Mechanical

Material options

316/316L stainless steel

Duplex

Other 2

Nominal pipe sizes1 2, 3, 4, 6, 8 or 10

Flange style1 ANSI 600, 900 and 1500

Pressure rating, psi (bar)

1

Up to 3,000 (206.84)Electronics temperature rating,

°F (°C)

-40 to 158 (-40 to 70) owmeter

14 to 140 (-10 to 60) ow computer

Environmental

Hazard rating (owmeter) Class I, Division 1

Material NACE MR0175/ISO 15156 Compliance

Gamma source Cs-137, 2mCi

1For other ranges, contact an authorized Weatherford representative.

2For other materials, contact an authorized Weatherford representative.

Performance

GVF < 20% 20% < GVF < 90% 90% < GVF < 98% GVF > 98%

Gas ow rate relative uncertainty ±10% ±7% ±5% ±5%

Gas ow rate repeatability ±0.1% ±0.1% ±0.05% ±0.05%

Liquid ow rate relative uncertainty ±5% ±7% ±10% ±75 bpd

Liquid ow rate repeatability ±0.05% ±0.1% ±0.1% ±10 bpd

GVF < 20% 20% < GVF < 95% 95% < GVF < 98% 98% < GVF < 99.5%

Water/liquid ratio absolute uncertainty ±2% ±3% ±4% ±10%

Water/liquid ratio absolute repeatability ±0.2% ±0.5% ±1% ±3%




Specications (continued)

Dimensions

Typical Alpha VSRD multiphase owmeter installation

Flowmeter Dimensions, in. (cm) Flow Computer Dimensions, in. (cm)

A* 36 (91.44) Height 19.125 (48.58)

B* 24 (60.96) Width 16.00 (40.64)

C No minimum requirement Depth 9.375 (23.81)

D No minimum requirement

*Approximate dimensions





Ordering variables

Position Choice Code Description

A Red Eye® MP1 water-cut meter +gamma densitometer

RD Both required for multiphase metering

B Process line size2

2 2 in.

3 3 in.

4 4 in.

6 6 in.

8 8 in.

10 10 in.

C Pressure rating2

P6 ANSI 600 equivalent,

1,200-psi (82.74-bar) cold working pressure (CWP)

P9 ANSI 900 equivalent, 1,800-psi (124.11-bar) CWP

P15 ANSI 1500 equivalent, 3,000-psi (206.84-bar) CWP

D Flange typeRF Raised face

RTJ Ring-type joint

E Wetted material316 316/316L stainless steel (SS)

DUP Duplex

F Differential pressure1 2 to 200 in. H

2O

2 10 to 840 in. H2O

G Static pressure1 30 to 1,500 psia (2.07 to 103.42 bara)

2 60 to 3,000 psia (4.14 to 206.84 bara)

H Power 1 11 to 30 VDC

2 115 to 230 VAC

I Pressure taps

1 Open

2 Sealed

1Refer to Red Eye MP water-cut meter brochure for conguration options.

2For other ranges, contact an authorized Weatherford representative.

The model number for the Alpha is built as follows: Alpha VS-A-B-C-D-E-F-G-H-I

Example: Alpha VSRD-3-P6-RF-316-2-1-1-1 would be described as having an

integrated spool Red Eye MP water-cut meter, gamma densitometer,

a 3-in. line, 1,200-psi (82.74-bar) CWP, raised-face ange, 316/316L

stainless steel, 10- to 840-in. H2O differential pressure, 30- to 1,500-

psia (2.07- to 103.42-bar) static pressure with 11 to 30 VDC supply

power and open-pressure tap lines.



weatherford.com

Weatherford products and services are subject to the Company’s standard terms and conditions, available on request or at weatherford.com. For more information contact an authorized Weatherford representative. Unless noted

otherwise, trademarks and service marks herein are the property of Weatherford and may be registered in the United States and/or other countries. Weatherford products named herein may be protected by one or more U.S.

and/or foreign patents. For more information, contact [email protected]. Specications are subject to change without notice. Weatherford sells its products and services in accordance with t he terms and conditions set

forth in the applicable contract between Weatherford and the client.

© 2010 Weatherford. All rights reserved. 7950.00


Weatherford provides worldwide service and support from more than 900 locations in

approximately 100 countries. To nd out more about our ow measurement technologies,

contact an authorized Weatherford representative or visit weatherford.com.

Accurate, real-time, multiphase owmetering

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Weatherford Flow Meters