downhole
composite
pipes
Akiet BV
Casing Solutions where steel falls short of expectations
• Dutch Company specialized in composite tubular
systems for deep down-hole applications
• Ten years of Composite R&D programs focused on
down hole applications only
downhole
composite
pipes
World Record
• HSCC™ successfully installed at
16,450 ft TVD
• Ran 7” casing in 8-3/8” hole
• Field proven glued connections and
steel-composite cross-overs
• Standard elevators and slips used
• Fit for purpose running gear
downhole
composite
pipes
Customer Need
• Horizontal and extended reach wells increase
productivity
• Friction from weight and buckling cause
limitations in running heavy steel casings
• Akiet developed light weight composite casings
with required strengths and OCTG dimensions
downhole
composite
pipes
Composites
• A combination of continuous fibers embedded in a resin
o Light weight ( ≈ 16.69 ppg) – almost in suspension in mud
o Anisotropic strength characteristics – engineered to application
o Internal wear-resistant liners possible
o Allow for See-Through-Logging™ (STL™)
downhole
composite
pipes
Akiet offer
• Composite well engineering
• Composite casing design
• Composite tubular manufacturing
• Slender, reliable couplings
• Installation services
downhole
composite
pipes
Composite Well Engineering
• Define all load cases including duration and fluid exposure
• A fluid or gas holding body may not crack: matrix failure as criterion to determine composite structure
• Check load versus design
• Prepare running program
downhole
composite
pipes
Composite Casing Design
• Proprietary software for very accurate buckling simulation based on anisotropic and non-anisotropic materials
• Finite Element Model to calculate lay-up design to match load requirements
• Variables take special manufacturing technology into account and include: o Fibre type, volume and orientation
o Resin type and volume (Wall thickness)
o Curing duration
downhole
composite
pipes
Extended Reach Well simulations
• Reach potential of >26,250 ft horizontal sections
• Light weight composite string below heavy steel casing optimises running weights
• No special installation techniques like floating required
• Installed without rotation: no load on connections
• Circulation possible to ease installation. Enables to:
o Apply pressure to ‘stiffen’ pipe
o Pump down casing
downhole
composite
pipes
Composite Tubulars
• Akiet has achieved breakthroughs by using different
technology than regular GRE winding
• High Strength (burst, collapse, tension, compression
and torque)
o Low void ratio
o Ideal fibre orientation in directions of highest loads
• Standard OCTG dimensions, 39 feet lengths
• Flexible yet sturdy
• Wear resistant, variety of liners available
downhole
composite
pipes
Slender Reliable Couplings
Proprietary field proven coupling technology
• Low offsets, slender design
• Ability to interface steel-composite, composite-
composite and composite-steel
• Stronger than tubular itself
• Glued in place with quick-drying cohesives
downhole
composite
pipes
Installation Services
Execution of running program
• Competent Staff
• Special Akiet alignment tools
• Standard drill floor layout
• Safe air-driven equipment
downhole
composite
pipes
Additional advantages over steel
• Light weight o Smaller rigs
o Drilling with casing possible (Enhanced Composite Casing Installation™), further reducing rig size
o Lower transport cost, helicopter transportable
o Easier and safer handling
• Corrosion resistant (CO2, H2S and more) o Longer well life
o Any damage does not cause corrosion
o No cement required for corrosion protection
• Transparent for logging measurements (See-Through-Logging™, STL™)
o Open hole tools usable in cased hole (E.g. Magnetic surveying)
o Time-lapse logging for advanced reservoir modelling
downhole
composite
pipes
Quality
• There is no certification for deep-well composite
casings because they did not exist
• Trial and testing program agreed with customer
• Example:
o First orders were tested under supervision of independant
agency TNO and Delft University of Technology
o Results were accepted by customers
downhole
composite
pipes
Substantiation of claims
• Example test results of earlier order for pipe and connection 7”
Target load (incl Safety Factors)
Test result
Tension 89 klbs 280 klbs
Compression 32 klbs 100 klbs
Burst 3945 psi 3988 psi Collapse 2639 psi 3002 psi
Torsion 2212 ft.lbs 12022 1)ft.lbs 1) No failure at limit of testing gear
Akiet BV www.akiet.com [email protected] +31 6 83 79 51 87
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