MANAGED PRESSURE
DRILLING PRESENTATION
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A Continuous Circulating Concentric
Casing System for Friction
Controlled Drilling
The Gardes Energy Services MPD System
Provides:
The down hole control of critical high-pressure, high-temperature wells while
drilling using a combination of both standpipe and concentric annulus fluid
injection to create frictional pressures on the return annulus and establish a
desired equivalent circulating density (ECD) at depth to drill near balance, at
balance or under balance in the formation.
During connections, the established standpipe injection volume used while
drilling is added to the normal annulus injection volume on the back side, so
the ECD remains constant, thus eliminating the bottom hole pressure surges
associated with connections and minimizing connection gas influx.
This system overcomes the problems associated with shallow geotechnical
hazards, well bore instability, lost circulation and narrow margins between
formation pore pressure and fracture gradient.
High Temp.,
High Pressure
MPD System
with the
patented dual
fluid friction
circulation.
Increased Concentric Casing circulating
rate creates instantaneous control of
reservoir inflow without the need for
surface pressures or modification of
drilling fluid densities.
Managed pressure drilling can
overcome a variety of problems
including shallow geotechnical
hazards, well bore instability, lost
circulation, and narrow margins
between formation pore pressure
and fracture gradient.
ECD management by planning and
monitoring a Managed Pressure
window.
Narrow ECD window between pore
pressure and bore hole collapse
that can be maintained with
Managed Pressure Drilling and the
Gardes Continuous Circulation dual
string technology
CONTINUOUS CIRCULATING CONCENTRIC CASING
Note: Using less-than-conventional
mud density, well will be
dynamically dead, but may be
statically under-balanced
T
V
D
DYNAMIC
BHP = HH(MW) + AFP
STATIC
BHP = HH(MW)
psi
AFP
ADVANTAGES OF GARDES ENERGY
SERVICES MPD CONCENTRIC CASING
CONTINOUS CIRCULATION SYSTEM
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Expands operating window between ECD and Frac Gradient.
Reduces excessive cost of circulating out connection gas.
Creates near constant and controllable ECD pressures.
Added well control during trips.
Continuous circulation during connections.
Can be run with all down hole deployment casing valves.
Contains all working pressures below rotary table not on rig floor.
System has an attached whip stock (up stock) for multi lateral
deviation or re entry.
System can be run in open or cased holes
System can be stripped out of hole to keep UB environment at
TD.
System can be run in straight, deviated or horizontal configured
well bores.
System is designed for all MPD situations, Under balanced or
tight ECD environments.
The purpose of MPD is to both
ascertain the down hole pressure
environment limits and manage
the annular hydraulic pressure
profile to fit within that window.
9500
9000
8500
Frac Gradient
8000
7500
7000
Pore Pressure
6500
Bore Hole Collapse
6000
5500
The Gardes Energy Services MPD System
Includes Neo Tech 7 Flow Modeling:
Figure 2: Bottom Hole Circulating Pressure (BHCP) vs. Liquid Injection Rates
Through Pre planned flow modeling, Down Hole Pressure
while drilling tools (PWD) and Real Time on location Flow
Modeling we are able to manage the Annular Hydraulic
Fluid Phase: Water Gas Phase: N/A
pressure profile to fit within any window.
4500
4400
Casing Size: 5 1/2"
O.H. Size: 4 3/4"
4300
Min. Vel.: N/A
4200
Min.PDM Vol.: 100 gpm
Bottom Hole Circulating Pressure (psi)
BackPressure: 30 psia
D.P. Size: 2 7/8"
Max PDM Vol.: 160 gpm
Correlations: OLGAS
4100
4000
3900
3800
3700
3600
3500
3400
100 gpm
120 gpm
3300
140 gpm
160 gpm
3200
Reservoir Pressure
Min. Target BHCP
3100
Max. Target BHCP
3000
0
50
100
150
200
Concentric Casing Fluid Injection (gpm)
250
300
Bottom Hole Circulating Pressure (BHCP) vs. Liquid Injection Rates. Actual Case
History Showing BHCP Control with Minimal Pressure Oscillations
4750
4625
4500
4375
4250
4125
4000
3875
3750
3625
3500
3375
3250
Vs
Inj
0
25
50
75
100
125
150
175
200
2250
250
The Gardes Energy Services MPD 4 Phase Surface
System Real Time:
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MPD may be accomplished by
many means including
combinations of backpressure,
variable fluid density, fluid
rheology, circulating friction, and
hole geometry
Wellhead for Continuous Circulation
BOP
Test Port
Secondary Seal
VR Threads
Surface Casing
Intermediate Casing
Wellhead for Continuous Circulation
BOP
Run in
Lockscrews
Running Tool with
Acme Thread
Carrier String Hanger
Micro-Annulus
Carrier String
Test to Working Pressure
Surface Casing
Intermediate Casing
Production Casing
Wellhead for Continuous Circulation
Injection Down Drill Pipe
Drill Pipe
Fluid Returns
Co-mingle
Injection Into
Micro Annulus
Wellhead for Continuous Circulation
Injection Down Drill Pipe
Drill Pipe
Fluid Returns
Co-mingle
Injection Into
Micro Annulus
Click for each Operation
Drilling Operation
1. Drill Surface Hole
2. Set Surface Casing
3. Drill Protective Hole
4. Set Protective Casing
5. Drill Liner Hole
6. Set liner
7. Run Tieback with Down Hole
Deployment Valve with Ports
above the DHDV
8. Rig up RBOP, Programmable
Choke, Surface Equipment, and
test.
9. Drill to Zone of Interest
10. Run Carrier String with
DHDV with or without Upstock
11. Drill out
12. Run Drill String with BHP
Tools and Float Subs
13. Go underbalance with mud
weight light enough to be 600
to 800 psi below BHP but with
annular friction to maintain
surface pressure less than
2,000 psi. Inject down the
backside and inside of the
tieback string taking returns
inside of the carrier string.
Protective and Tieback casing
designed for production
Ports
DHDV
Not necessary to drill out from the
liner or the carrier string to go
underbalanced.
DHDV
Carrier String
Robert Gardes
phone # 337/234-6544
email: rgardes@gardesenergy.com