2. downhole
composite
tubulars
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
3. downhole
composite
tubulars
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
4. downhole
composite
tubulars
Customer Need
• In certain geological settings and applications
corrosion and/or scaling can limit well performance
and productive well life
o Water injection wells
o Loss circulation zones
o CO2 and H2S producing reservoirs
• Akiet developed corrosion free composite casings with
required strength and standard OCTG dimensions
5. downhole
composite
tubulars
Composites
• A combination of continuous fibers embedded in
a resin
o Not affected by acidic or bacteriological corrosion, also after
scratching or wear
o Not susceptible to scaling
o Anisotropic strength characteristics
o Internal wear-resistant liners possible
o Light weight
7. downhole
composite
tubulars
Composite Well Engineering
• A fluid or gas holding body may not crack: matrix
failure as criterion
• Define all load cases taking composite weights
into account including duration and fluid
exposure
• Check load versus design and prepare running
program
8. downhole
composite
tubulars
Composite Casing Design
• Akiet has proprietary modelling software
• Finite Element Model to calculate lay-up design to
match heaviest load requirements
• Variables include:
o Fibre orientation, volume and type
o Resin type and volume
o Curing time
• Takes specific manufacturing technique into
consideration
9. downhole
composite
tubulars
Composite Tubulars
Akiet has achieved breakthroughs by using Rotary
Casting Technology
• High Strength (burst, collapse, compression,
tension and torque)
• Standard OCTG dimensions, 39 feet lengths
• Flexible yet sturdy
• Wear resistant, variety of liners available
10. downhole
composite
tubulars
Slender Reliable Couplings
Proprietary coupling technology
• Low off-set, slender design (VAM TOP equivalent)
• Ability to interface steel-composite, composite-
composite and composite-steel
• Stronger than tubular itself
• Glued in place with quick-drying cohesives
12. downhole
composite
tubulars
Additional advantages over
steel
• Akiet Composite systems are light weight
o Reduced hook-load lighter equipment
o Reduced safety incidents
o Easier handling
o Ability to complete long horizontals
• Akiet composite systems are transparent for
logging
13. downhole
composite
tubulars
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 independent
agency TNO and Delft University of Technology
o Results were accepted by customers
15. downhole
composite
tubulars
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
