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Scott Campbell - Rocky Mountain Sales Manager
720-946-1365- Denver Office
CVR SystemCritical Velocity Reduction
Combination of Dead Strings, Capillary Injection Foamer and Plunger Lift
1© 2006 Weatherford. All rights reserved.
Critical Flow Rates
0
500
1,000
1,500
2,000
2,500
3,000
3,500
4,000
0 100 200 300 400 500 600 700 800 900 1,000
Wellhead Pressure (psi)
Flo
w R
ate
(m
cf/
d)
1.00"/0.826"
1.25"/1.076"
1.50"/1.310"
2.0"/1.78"
1.90/1.61
2 1/16"/1.75
2 3/8"/1.995
2 7/8"/2.441
3.5"/2.867
4.5 11.6 lb/ft
5.5 20 lb/ft
7.0" 26 lb./ft
4.5" Casing w / 2 3/8" Tubing
5.5" Casing w / 2 7/8" Tubing
7.0" Casing w / 3 1/2" Tubing
1.00-in. OD/0.826-in. ID CT
1.25-in. OD/1.076-in. ID CT
1.50-in. OD/1.310-in. ID CT
2.00-in. OD/1.780-in. ID CT
1.90-in. OD/1.610-in. ID API Tubing
2 1/16-in. OD/1.750-in. ID API Tubing
2 3/8-in. OD/1.995-in. ID API Tubing
2 7/8-in. OD/2.441-in. ID API Tubing
3.50-in. OD/2.867-in. ID API Tubing
4.5-in., 11.6-lb/ft Casing
5.5-in., 20-lb/ft Casing
7-in., 26-lb/ft Casing
4.5-in. Casing w/2 7/8-in./ Tubing
5.5-in. Casing w/2 7/8-in./ Tubing
7.0-in. Casing w/3 1/2-in./ Tubing
2© 2006 Weatherford. All rights reserved.
Typical Completion:
2 3/8” Production Tubing
4 ½” Casing 11.6# Casing
200 PSI Line Pressure
Extended Perforation Interval
3© 2006 Weatherford. All rights reserved.
Critical flow requirements assuming
200-psi WHBP(FTP):
CFR for 2-3/8” = 406 mcf/dCFR for 4-1/2” = 1.63 MMcf/d
Typical Completion
• Production String: 2-3/8”, 4.7 lb/ft
• Casing: 4-1/2”, 11.6 lb.ft
– 4.000-in. ID
– 3.875-in. drift
– Flow area: 12.5683 in.2
2 3/8”tubing
Extended
perforation
interval
4 ½” casing
A B
4© 2006 Weatherford. All rights reserved.
4 ½” Casing, 2 7/8” Dead String
2 3/8”X-LOC nipple
2 3/8” perforated sub36- ¾” holes
2 3/8” X-nipplew/ retrievable plug
2 3/8” X 2 7/8”crossover
2 7/8” tubing “dead string”
2 3/8” tubing
Shear-out safety jt.
4 ½”., 11.6-lb/ft casing
• Production String: 2 3/8”
• Dead String: 2 7/8” ULTRA FLUSH
– NO couplings = 2 7/8” = 2.875” OD
• Casing: 4-1/2”, 11.6 lb/ft
– Flow area: 12.5683 in.2
• Annular flow area, 2-7/8” inside 4-1/2”
– Flow area: 6.0768 in.2
Critical flow requirements assuming 200-psi WHBP:
CFR for 2-3/8” = 406 mcf/dCFR for 4-1/2” x 2 7/8” annulus = 790 mcf/d
(was 1.63 MMcf/d with open 4 ½” casing)
5© 2006 Weatherford. All rights reserved.
Casing Size
O.D.= 4 ½”
I.D. = 4.00”
Tubing Size
O.D.= 2 7/8”
I.D. = 2.441”
Annulus Area, in2
6.0768
4 ½” Casing, 2 7/8” Tubing
6© 2006 Weatherford. All rights reserved.
2 3/8” perforated sub36- ¾” holes
2 3/8” X 2 7/8”crossover
2 3/8” tubing
2 3/8” X-nipplew/ retrievable plug
¼” capillary injection string
injection valve and mandrel
Shear-out sub
2 7/8” dead string
4 ½” casing
• Production String: 2-3/8”
• Dead String: 2 7/8” ULTRA FLUSH
• Casing: 4 ½”, 11.6-lb/ft casing
– Flow area: 12.5683 in.2
• Annular Flow Area: 2-7/8” inside 4-1/2”
– Flow area: 6.0768 in.2
Critical flow requirements assuming 200-psi WHBP:
2 3/8” = 168 mcf/d with foam(was 406 mcf/d without foam)
4 ½” x 2 7/8” annulus = 327 mcf/d with foam
(was 790 mcf/d without foam)
(was 1.63 MMcf/d without Dead String)
4 ½” Casing, 2 7/8” Dead Stringwith Capillary String for Foamer Injection
7© 2006 Weatherford. All rights reserved.
Bumper Spring
Perforation Interval
THREE ARTIFICIAL LIFT SYSTEMS WORKING TOGETHER:
– Area Reduction (Dead String)
– Surface Tension and Density Reduction (Foamer)
– Plunger Lift (Mechanical Interface)
8© 2006 Weatherford. All rights reserved.
Heavy-Wall Flow Sub with Isolation
Sleeve
Kobe knockout
equalization plug
Seal ring packing
WX-LOK dogs
Internal fishing neck
Heavy-Duty Flow Sub
2 3/8” tubing, 36 ¾” holes
OD = 3.063”
ID = 1.995”
Top sub w/ WX
1.875” profile
Over 5 times
the flow area
of 2 3/8”
tubing
1.875” polished bore
Pressure equalization
knockout plug
Isolation Sleeve
OD = 1.75”
ID = 0.98”
Seal ring packing
9© 2006 Weatherford. All rights reserved.
FWHP = 200 PSI
9.1757
12.3120
6.0768
14.3683
8.1360
18.7978
12.5683
7.0315
4.6800
3.1262
Flow Area
(in.2 )
168.4406.70
6.5015.70
0.021712 3/8-in., 4.7-lb/ft tubing
252.1608.800.032502 7/8-in., 6.5-lb/ft tubing
378.8914.700.048833 1/2-in., 9.20-lb/ft tubing
676.91,634.900.087284 1/2-in., 11.6-lb/ft casing
1,012.52,445.400.130545 1/2-in., 17-lb/ft casing
494.21,193.700.063723 1/2-in. tubing and 5 1/2-in. casing
662.81,600.800.085502 7/8-in. tubing and 5 1/2-in. casing
327.2790.300.042202 7/8-in. tubing and 4 1/2-in. casing
773.91,869.000.099782 3/8-in. tubing and 5 1/2-in. casing
438.31,058.500.056502 3/8-in.tubing and 4 1/2-in. casing
CFR with
Foam
(mcf/d)
CFR with
Water
(mcf/d)
CV with
Foam,
(ft /sec)
CV with
Water,
(ft /sec)
Flow Area
(ft2)
Flow Pattern
CV = Critical velocity, ft/secCFR = Critical flow rate, mcf/dFlowing surface temperature = 70°FDensity of water = 8.4 lb/galZ = 0.97
10© 2006 Weatherford. All rights reserved.
4 ½” Casing with 2 7/8” Dead String with 2 3/8” Production Tubing
11© 2006 Weatherford. All rights reserved.
Installation Pictures
and
Production Data
12© 2006 Weatherford. All rights reserved.
4 1/2" , 11.6#, HCP-110 set at 11,600' w/1,930 sx
2 3/8" , 4.7#, N-80, tubing w/"XN" nipple (1.87") and 22.5' tubing below nipple
EOT--10,732' cut off with chemical cutter
Tubing joint cut off - 22.5' long
XN Nipple @ +/-10,709'
10,746' - 10,752' 10,810' - 10,818' Frac w/1486 bbl Primefrac 30 w/30% N2
10,756' - 10,762' 3SPF 120 Deg. 6,077# 100 mesh and 116,847 # 20-40 Econoprop
Upper & Lower Lewis tested after frac 550mcf/d@150psi
10,878' - 10,881' 10,908' - 10,916' Frac #1 w/429 bbl x-link gell and 6,500# 100 mesh--RAN OUT of crosslinker
3SPF 120 Deg. Frac # 2 wPrimefrac 30, 30% N2, 6,705# 100 mesh and 7,276# Econoprop - Screened out
11,206' - 11,208' 11,299' - 11,301'
11,216' - 11,218' 11,305' - 11,310' Frac w/1,826 bbl Primefrac 30 w/30% N2
11,238' - 11,240' 11,314' - 11,319' 6,899# 100 mesh and 175,962# 20-40 Econoprop
11,254' - 11,256' 11,323' - 11,328' Middle & Lower Almond test after frac 856mcf/d@240psi
2SPF 120 Deg.
11,401' - 11,409' 11,445' - 11,453' Frac Lower Almond w/1,160 bbl Primefrac-30 w/30% N2,
3 SPF 5,500# 100 mesh and 90,231 # 20-40 Econoprop
9' tubing, 2' bit sub and 3-7/8" bit pushed to 11,456'
PBTD 11,516'
FLOAT COL. 11,553'
SHOE 11,600'
TD 11,620'
Lower Lewis
Upper Lewis
Middle Almond
Lower Almond
Example Well “A”Wamsutter, Wyoming
Before Installation
13© 2006 Weatherford. All rights reserved.
4 1/2" , 11.6#, HCP-110 set at 11,600' w/1,930 sx
2 3/8" , 4.7#, N-80 Tubing - 334 Joints
10,746' - 10,752' 10,810' - 10,818' Frac w/1486 bbl Primefrac 30 w/30% N2
10,756' - 10,762' 3SPF 120 Deg. 6,077# 100 mesh and 116,847 # 20-40 Econoprop
Upper & Lower Lewis tested after frac 550mcf/d@150psi
10,878' - 10,881' 10,908' - 10,916' Frac #1 w/429 bbl x-link gell and 6,500# 100 mesh--RAN OUT of crosslinker
3SPF 120 Deg. Frac # 2 wPrimefrac 30, 30% N2, 6,705# 100 mesh and 7,276# Econoprop - Screened out
11,206' - 11,208' 11,299' - 11,301'
11,216' - 11,218' 11,305' - 11,310' Frac w/1,826 bbl Primefrac 30 w/30% N2
11,238' - 11,240' 11,314' - 11,319' 6,899# 100 mesh and 175,962# 20-40 Econoprop
11,254' - 11,256' 11,323' - 11,328' Middle & Lower Almond test after frac 856mcf/d@240psi
2SPF 120 Deg.
11,401' - 11,409' 11,445' - 11,453' Frac Lower Almond w/1,160 bbl Primefrac-30 w/30% N2,
3 SPF 5,500# 100 mesh and 90,231 # 20-40 Econoprop
End of 2 3/8" Tubing --10,709.5' -- 334 Joints
End of Weatherford Assembly -- 10722.8'
Weatherford Assembly
- 2 3/8" Heavy Duty Perforated Flow Sub -- 4.8' -- 36 3/4" holes
- X-Nipple - 1.87" Profile - 1.0'
- 2 3/8" CM1CI -- 4.5'
- XN-Nipple -- 1.0'
- 2 3/8" Sheer out safetly joint - Set at 27,000# - 0.8'
- Crossover -- 1.2'
End of 2 7/8" Dead String -- 11349.2'
9' tubing, 2' bit sub and 3-7/8" bit pushed to 11,456'
PBTD 11,516'
FLOAT COL. 11,553'
SHOE 11,600'
TD 11,620'
Lower Lewis
Upper Lewis
Middle Almond
Lower Almond
Example Well “A”Wamsutter, Wyoming
After Installation
NOT TO SCALE-
End of 2 3/8” Tubing @ 10,709’
End of 2 7/8” Dead String @ 11,349’
650’ of 2 7/8” UFJ
14© 2006 Weatherford. All rights reserved.
CUSTOMER:CUSTOMER:CUSTOMER:CUSTOMER:COMPANY REP:COMPANY REP:COMPANY REP:COMPANY REP:WCS REP:WCS REP:WCS REP:WCS REP:LEASE:LEASE:LEASE:LEASE:WELL NAME AND NUMBER:WELL NAME AND NUMBER:WELL NAME AND NUMBER:WELL NAME AND NUMBER:CASING SIZE AND WEIGHT:CASING SIZE AND WEIGHT:CASING SIZE AND WEIGHT:CASING SIZE AND WEIGHT:LINER SIZE AND WEIGHT:LINER SIZE AND WEIGHT:LINER SIZE AND WEIGHT:LINER SIZE AND WEIGHT:TUBING SIZE AND WEIGHT:TUBING SIZE AND WEIGHT:TUBING SIZE AND WEIGHT:TUBING SIZE AND WEIGHT:DEAD STRING SIZE AND WEIGHT: DEAD STRING SIZE AND WEIGHT: DEAD STRING SIZE AND WEIGHT: DEAD STRING SIZE AND WEIGHT: STATE:STATE:STATE:STATE:COUNTY:COUNTY:COUNTY:COUNTY:
DATE:DATE:DATE:DATE:
ITEMITEMITEMITEM DEPTH
AAAA
B 10,709.50'
C 10,714.30'
D 10,715.30'
E 10,719.80'
F 10,720.80'
G 10,721.60'
H 10,722.80'
I 11,349.20'
650' of 2 7/8" Ultra Flush Joint Tubing
2 3/8" EUE X 2 7/8" X-Over Sub
2 7/8" "Dead String"
4 1/2" 11.6# HCP-1104 1/2" 11.6# HCP-1104 1/2" 11.6# HCP-1104 1/2" 11.6# HCP-110
2 3/8" Mechanical Shear Out Safety
Example Well "B"Example Well "B"Example Well "B"Example Well "B"Wamsutter, WyomingWamsutter, WyomingWamsutter, WyomingWamsutter, WyomingScott CampbellScott CampbellScott CampbellScott Campbell
N/AN/AN/AN/A2 3/8" 4.7# N-802 3/8" 4.7# N-802 3/8" 4.7# N-802 3/8" 4.7# N-80
1/4" Stainless Steel Chemical Injection
Tubing 10,719' Installed
2 7/8" Ultra Flush Joint2 7/8" Ultra Flush Joint2 7/8" Ultra Flush Joint2 7/8" Ultra Flush JointWyomingWyomingWyomingWyomingSweetwaterSweetwaterSweetwaterSweetwater
2 3/8" 4.7# N-80 Production Tubing
2 3/8" X 1.875" WX Profile Nipple With
"XX" Blanking Plug In Place
2 3/8" "CM-1 CI" Chemical Injection Sub
Joint
2 3/8" X 1.875" WXN Nipple
2 3/8" Heavy Duty Perforated Flow Sub
Low er
Almond
11,401'
11,453'
Middle
Almond
11,206'
11,328'
Lower
Lewis
10,878'
10,916'
Upper
Lewis
10,746'
10,762'
A
B
C
D
E
F
G
H
I
PBTD 11,516.00'
Example Well “A”Wamsutter, Wyoming
15© 2006 Weatherford. All rights reserved.
Wamsutter, Wyoming WCVR Install
0
100
200
300
400
500
600
700
800
900
1000
1100
1200
1300
1400
1500
1600
1-Sep-0
515-S
ep-05
1-Oct-
0515 -O
ct-0
5
1-Nov-0
515-N
ov-05
1-Dec-0
515-D
ec-05
1-Jan -0
615-Ja
n-06
1-Feb-0
615-F
eb-06
1-Mar-0
615 -M
ar-06
1-Apr-0
615-A
pr-06
1-May-
0615 -M
ay-06
1-Jun-0
611-Ju
n-06
Date
Pro
du
cti
on
Gas Casing Line
Foamer and plunger
WCVR InstallNatural Flow
Compressor Problems
Foamer Only
16© 2006 Weatherford. All rights reserved.
Example Well B
17© 2006 Weatherford. All rights reserved.
Example Well C
18© 2006 Weatherford. All rights reserved.
Example Well D
19© 2006 Weatherford. All rights reserved.
Example Well D
20© 2006 Weatherford. All rights reserved.
Example Well E
21© 2006 Weatherford. All rights reserved.
WCVR Presentation Summary
• The WCVR System is specifically designed for Extended
Perforation Interval Liquid Loading Gas Wells
• The WCVR System is a creative combination of three
generally accepted methods used to combat liquid loading in
gas wells; area reduction, foamer, plunger lift
• As of this presentation, over 130 WCVR’s have been installed
22© 2006 Weatherford. All rights reserved.
Scott Campbell - Rocky Mountain Sales Manager
720-946-1365 Denver, Colorado Office
CVR SystemCritical Velocity Reduction
Combination of Dead Strings, Capillary Injection Foamer and Plunger Lift
Thank You!
Any Questions?
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