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Composite Flexible Pipe f-or Offshore Oil





     Composite Flexible Pipe for Offshore Oilfield is the most advanced non-bonding non-metal flexible pipe in the world, which is designed and manufactured by introducing advanced technology and equipments.
     The product can be designed and manufactured according to detail application parameters, including engineering design and product design. The product design is based on engineering design and reaches relevant index through design and selection of structure and material. The product applies for conveying medium of oil, gas, water, etc for offshore oilfield.




 
1)Flexible pipe for ocean: Dynamic riser analysis, stress fatigue analysis, seabed pipe installation, etc.
2)Structural stress finite element analysis: Material non-linearity, large displacement and strain, problem of contact, etc.
3)Development of engineering analysis software
4)Investigation research-damage analysis of special engineering problem.
5)Stress analysis of wall of flexible pipe for ocean.
6)Design and analysis of end fitting of flexible pipe for ocean.

 


 
1)Flexible pipe for ocean: Dynamic riser analysis, stress fatigue analysis, seabed pipe installation, etc.
2)Structural stress finite element analysis: Material non-linearity, large displacement and strain, problem of contact, etc.
3)Development of engineering analysis software
4)Investigation research-damage analysis of special engineering problem.
5)Stress analysis of wall of flexible pipe for ocean.
6)Design and analysis of end fitting of flexible pipe for ocean.



     Design, production and inspection of composite flexible pipe for offshore oilfield are in conformity with API SPEC 17J standard.

Gravity, Buoyancy
      Considering the practical weight of unit pipe length in air and water, applicable tension for installation can be confirmed for guaranteeing no pipe float in the use process and weight coating design is necessary.
Hydrostatic Pressure
      Composite flexible pipe is affected by long term internal pressure in the use process, so the pipe shall bear certain internal pressure to achieve pressure retaining effect. The structure of reinforcement layer is designed according to tensile strength and specification of reinforcement material, and the maximum support pressure of pipe is calculated through analyzing stress distribution of pipe under pressure with finite element analysis program. 
Tensile Strength
      For the specificity of ocean environment, ocean environment load shall be considered in both pipe installation and use process. The pipe will be under tensile effect in both pipe installation and future maintenance.
Ocean Hydrostatic Pressure
      The pipe will be under the combining effect of ocean and soil in practical work, so it is necessary to do ocean hydrostatic pressure to guarantee the safety of pipe in installation and operation.
Bending Stiffness
      The bending performance of pipe is an important aspect in confirming performance index of flexible pipe. To measure the bending performance of pipe, bending stiffness design is necessary.
Minimum Bending Radius
      Flexible pipe will always be in a bending state in its storage and installation, and the pipe shall keep good mechanics property after reaching its minimum bending radius.
Torsion
      Considering the mechanism between two layers of pipe is complicated for the pipe having many metal layers and spiral wound has great affect on torsion, it is important to test torsion performance.
Transverse Stress Tolerance
      The pipe will be pressed by stretcher in its installation, so the pipe will have deformation or even have destructive permanent deformation under transverse pressure. Therefore, maximum allowable press force of stretcher’s track and stress between displacement and layers on the contact points of track and pipe shall be calculated out. The design of transverse pressure resistance of flexible pipe is very important for evaluating whether or not the pipe can be used safely after accidental press.



     Shallow lay barge which is specially designed for offshore operation is adopted in pipe installation, because the barge can lay seabed pipeline, fill seabed pipeline trench and provide offshore engineering support service and pipeline emergency service, etc. 
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