14.RC3RC1-WCP-CAL-00, REV 0 (AB)

Project Description: RC3RC1 PLATFORM

Owner: VIETSOVPETRO JOINT VENTURE

Client: SS-TECH ENGINEERING SDN BHD DOCUMENT NO.: RC3RC1-WCP - CAL - OO of 6 DOCUMENT DESCRIPTION:

WCP001

DESIGN CALCULATION

REVISION STATUS DATE DESCRIPTION VERIFIED BY PROJECT

MANAGER

0 12 APR 10 AS BUILT RT MT

Revision Status: P A,B,C,… 0,1,2,3…

Preliminary for information / bid For Client Comments & Approval Approved & Valid for Construction

SEMiTECHSEMITECH OFFSHORE ENGRG & SUPPLY PTE. LTD.6, Penjuru Place, #01‐24 Penjuru Tech Hub Singapore 608 781 Tel: (65) 9767 3409 Fax: (65) 6261 4400

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DOCUMENT TITLE:

WCP-001 DESIGN CALCULATION

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DOCUMENT NO.: RC3RC1-WCP - CAL - 00 REVISION

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TABLE OF CONTENTS

1. RESERVOIR SIZING CALCULATION 2. CALCULATION FOR WELL CLOSETIME 3. CALCULATION FOR AIR SUPPLY REGULATOR 4. DESIGN CALCULATION FOR PUMP SIZING 5. GAS CONSUMPTION CALCULATION

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1. RESERVOIR SIZING CALCULATION Volumes of Wellhead Valves

SCSSV = 2.2 L x Quantity of 6 = 13.2L

MSSV = 3.4 L x Quantity of 6 = 20.4L WSSV = 3.4 L x Quantity of 6 = 20.4L

TOTAL = 54.0L

1.1 All hydraulic field lines are to be pre-filled. This will require 19 gallons (U.S.) to

fill the 2000m of 3/8" 0.065 and 1000m of 1/4" x 0.049 tubing.

1.2 The return header (100m of 1" x 0.035 wall) tubing will hold 11 gallons (U.S.) of fluid. This will fill the second time surface valves are shut-in.

Both A & B above are one time usages of fluid and are given for calculation of required fluid at start-up.

1.3 Reservoir Sizing

Required volume from "A" above = 54.0

20% Spare Capacity = 10.8

Total = 64.8

To operate at 25% & 75% of capacity required x 2

= 130L Conclusion: as requested, 320 L reservoir is provided instead

2. CALCULATION FOR WELL CLOSETIME

2.1. SCSSV Close Time The calculation is basing in accordance with the following data :

- The tube size 1/4'' OD x 0.049” WT from SCSSV to WCP

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- The tube length is 200m from SCSSV to WCP - The SCSSV fully close at hydraulic pressure is 13.8 Bar - SG of hydraulic oil 0.87

Qw = Q2 x 0.87^0.5 = 16 x 0.87^0.5 = 1.99 GPM = 0.094 L

SCSSV close time = 2.2/0.094 = 23.4 sec Safety factor is 2 Result: SCSSV close time 47 sec

2.2. MSSV/WSSV Close time

The calculation is basing in accordance with the following data : - The tube size 1” OD x 0.065” WT from MSSV to WCP - The tube length is 100m , from MSSV to WCP - The MSSV fully close at hydraulic pressure is 6.9 Bar - SG of hydraulic oil 0.87

Qw = Q2 x 0.87^0.5 = 23 GPM = 1.45 L

MSSV close time = 3.4/1.45 = 2.4 sec Safety factor is 2 Result: MSSV close time 5 sec

3. CALCULATION FOR AIR SUPPLY REGULATOR

SCFM(Q) = 16(CV) √ □P(P1+P2) T1SG

= 16 x 1.1 √ 4 x (74.7+70.7) (460+140) x 1 = 17.33 scfm

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SCFM(Q) Flow in standard cubic feet per minutes Cv Flow co-efficient for pressure regulator P1 Absolute inlet pressure (Bar) = 4.14 + 1 = 5.14 P2 Absolute outlet pressure (Bar) = 3.86 + 1 = 4.86 SG Specific gravity relative to air = 1 T1 Absolute inlet temperature degrees rankines = 460 + 140 = 600 �P Pressure drop in pound per square inch (Bar) = 0.275

4. DESIGN CALCULATION FOR PUMP SIZING

4.1. SSV PUMP

The hydraulic Pump sizing for SSV is based on the following technical Data: • To open one SSV Valve within 5 Minutes • The Volume require to open one SSV is 3.4 liter • The Pump Discharge Pressure is 140 Bar • Instrument Air Supply Pressure is 7 Bar

The M37-01-HL pump will deliver 1.05 LPM with an air drive pressure of 7 bar and pump discharge pressure 140 Bar

Please refer to M37-01-HL pump performance chart. The opening Time 3.4 liters/ 1.05 =< 4 Minutes Conclusion: pump M37-01-HL is sufficient to open SSV valve within specified 5 minutes

4.2. SCSSV PUMP

The hydraulic Pump sizing for SCSSV is based on the following technical Data: • To open one SCSSV Valve within 5 Minutes • The Volume require to open of One SCSSV is 2.2 litre (including the volume of

tubing line of actual volume SCSSV will not exceed 0.3L and 1.9L tubing volume.

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Tubing Line will be filled only once (during initial period and it will not be required to fill again of this volume of 1.9L)

• The Pump Discharge Pressure is 490 Bar • Instrument Air Supply Pressure is 7 Bar The proposed M111-01-HL pump will deliver 0.32 LPM with an air drive pressure of 7 barg and pump discharge pressure 490 Bar. Please refer to M111-01-HL pump performance chart. The opening Time 0.3 litre/ 0.32= <1 minute Conclusion: pump M111-01-HL is sufficient to open SCSSV valve within specified 5 minutes

5. GAS CONSUMPTION CALCULATION

The design values for gas consumption shall be calculated using the following method. The peak-load requirement of each unit or group of units modified by a usage or working factor. The continuous demand will be the sum of all the adjusted peak-load requirements.

STANDARD VOLUME PER SECOND

Unit Peak load (l/s)

Usage factor

Continuous demand (l/s)

Tubing 1 0.7 0.7 Pressure gauges 0.4 0.2 0.08 Pneumatic indicators, pressure switches 0.5 0.2 0.1

Air driven hydraulic pumps (10 scfm x 1) + (30 scfm x 1) 20 1 20

Pilot/solenoid/manual relay/flow control needle valve/ level switches 2 0.4 0.8

Pressure regulators 0.7 1 0.7 Total 22.38 l/s

Total continuous demand (air) = =

1342.8 l/m 47.4 scfm

14.RC3RC1-WCP-CAL-00, REV 0 (AB)

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