1. Continuous Flow (IPO) Valves
Dual Gas Lift
Continuous Flow (IPO) Valves
Offshore West Africa
Well X-1 (long) and X-1D (short)

2. RCF Series - IPO Valves for Continuous Flow
Special IPO gas lift valves for continuous flow (R-1CF & RCF-2) used in redesign of well, X-1
RCF series valves are simply IPO valves with gas chokes positioned upstream of valve port or seat
Valve configuration maintains tubing sensitivity after valve is in open position

3. Formation Tops W/ Pay Orig. KB TH 59’ Curr. KBTH 59’
Orig. KB Elev. 91’
(Above Sea Level)
Jkt
TVDSS 6422
’ TD
WLM Zero MD
Directional Well
Max Angle ft
LONG STRING – 2-7/8”
MD TVD SS
SCSSV ’ ’
N-Nip ’ ’
GLM # ’ ’
GLM # ’ ’
GLM # ’ ’
GLM # ’ ’
GLM # ’ ’
GLM # ’ ’
GLM # ‘ ’
GLM # ’ ’
GLM # ’ ’
GLM # ’ ’
GLM # ’ ’
2 7/8” X-LN ’ ’
9 5/8” U-Pkr Ext 5588’ ’
9 5/8” 51.B Pkr ’ ’
9 5/8” L-Pkr Ext 5596’ ’
Blast Jts ’ ’
2 7/8” X-LN ’ ’
9 5/8” FHL Pkr ’ ’
2 7/8” X-LNp ’ ’
Perf Pup Jt ’ ’
2 7/8” XN-LNp ’ ’
EOT ’ ’
2 7/8” 6.50 #, L-80 CSH Tubing
SHORT STRING – 3-1/2”
MD TVDss
SCSSV 496’ 404’
X-LNp 1001’ 902’
GLM # ’ 1282’
GLM # ’ 1892’
GLM # ’ 2357’
GLM # ’ 2707’
GLM # ’ 3056’
GLM # ’ 3407’
GLM # ’ 3700’
GLM # ’ 3993’
GLM # ’ 4316’
GLM # ’ 4609’
GLM # ’ 4902’
3 1/2” X-LNp 5580’ 5141’
9 5/8” U-Pkr Ext 5591’ 5152’
9 5/8” 51.B Pkr 5591’ 5152’
9 5/8” L-Pkr Ext 5597’ 5157’
3 1/2” X-LNp 5612’ 5171’
Perf Pup Jt 5613’ 5172’
3 1/2” XN-LNp 5619’ 5177’
EOT 5629’ 5187’
Formation Tops W/ Pay
MD TVDss
4523’ ’
4740’ ’
4946’ ’
5595’ ’
5640’ ’
6188’ ’
6659’ ’
6830’ ’

4. Well X1 (Dual) History
Well completed as common annulus dual; G/L mandrels contained dummy valves; both wells came in flowing naturally
Waterflood injection initiated into reservoirs
Due to increasing water cut and declining production, R-2 IPO valves were installed in 3.5” short string; valves were designed for 800 psi KO, 750 psi OP
Due to increasing water cut and declining production, R-1CF IPO valves were installed in 2-7/8” long string; valves were designed for 750 psi OP
July 1996
June 1998
Sept. 1998
Mar. 2000

5. X-1D (short)
Sept 1998 – R-2 IPO gas lift valves installed for unloading and gas lift operation, if required
PI = 3.35 B/D/psi
BHT = 165 deg F
Design Rate = 2000 B/D
%WC = 80%
GL Pressure = 800 psi
Recorded SBHP = 1600 psi (26 Sept 98)

6. Well X-1 (Dual) History
High lift gas usage to both strings and production decline from short string prompted re-design of both strings; higher available gas lift pressure supply of 1150 psi allowed both strings to be designed for PSO pressure of 1050 psi
R-1CF and R-2CF continuous flow valves were installed by slick-line
Tests showed lift gas reduction in both strings, with oil increase of 560 barrels from short string
Jan. 2002
Feb. 2002

7. X-1 (Long)
After GLV redesign and installation, well producing 1,750 bfpd with Qi = 500 mcfpd and lifting from GLV depth (4104 ft TVD)

8. X-1D (short)
Jan 2002 – redesign with RCF-2 valves for 1050 psi Operating Pressure
BFPD =
2500 [+1000 bfpd]
Qi = 750 Mcfpd
[-500 Mcfpd]
Injection Depth = 4993’ TVD

9. Well Test Data X-1

10. Well Test Data – X-1D

11. X-1 GLV Installation

12. X-1D GLV Installation

13. X-1 Results
R-1CF & RCF-2 gas lift valves allow GL designer to maintain higher injection pressure, thus deeper injection depth
Different Injection Depths for each tubing string ’ TVD for X-1 and 4993’ TVD for X-1D
X-1 - increase in fluid rate by 10%
X-1D - increase in fluid rate by 65%
Combined (Qi) gas injection rate was reduced by 25%
Combined oil gain was 560 bopd

14. Continuous Flow (IPO) Valves
Dual Gas Lift
Continuous Flow (IPO) Valves
?? QUESTIONS ??