WelPAN™
WelPAN™ cement strengthening additive is a 3.2 mm precision-cut polyacrylonitrile (PAN) acrylic micro-fiber engineered to enhance the mechanical performance and long-term integrity of cement systems. Manufactured from polyacrylonitrile (PAN), the same base polymer used in carbon fiber production, WelPan provides high-strength synthetic reinforcement within the cement matrix. Upon hydration and set, the distributed fibers help mitigate microcrack initiation and propagation, improve tensile and increase resistance to mechanical and thermal stresses. The result is a more resilient cement sheath designed to maintain zonal isolation under demanding downhole conditions.
Advantage
- WelPAN™ creates a distributed micro-reinforcement network within the cement sheath, improving tensile strength and resistance to fracture propagation.
- The 3.2 mm precision-cut fiber length optimizes dispersion and bonding within the cement matrix without adversely affecting slurry pumpability.
- WelPAN fiber chemistry provides high thermal stability and chemical resistance in downhole environments.
- The fiber structure enhances resistance to shrinkage cracking and stress loading.
- WelPAN contributes to improved impact resistance and flexural strength of set cement.
Application
- WelPAN™ is used in primary cementing applications where enhanced mechanical integrity and crack resistance are required to ensure long-term zonal isolation.
- It is particularly suited for wells exposed to thermal cycling, pressure fluctuations, and mechanical loading that can induce micro-annulus formation or sheath debonding.
- The fiber is effective in cementing across depleted, fractured, or stress-sensitive formations where durability and toughness are critical.
- WelPAN can be integrated into both conventional and lightweight slurry designs to improve tensile performance without compromising pumpability.
- It is recommended for wells with elevated risk of sustained casing pressure or long-term structural fatigue where reinforced cement systems provide added reliability.
Environmental Advantage
- WelPAN™ reinforces the cement matrix, limiting fracture development, reducing the likelihood of remedial squeeze operations and additional cement jobs.
- The distributed PAN fiber network enhances mechanical integrity, supporting extended cement sheath service life under cyclic downhole stresses.
- By mitigating cement fracture propagation and structural fatigue, WelPAN lowers long-term failure risk and reduces the need for future material-intensive interventions over the life of the well.
Physical Properties
Appearance: Fine white/yellow synthetic fibers
Temperature: Suitable for elevated downhole temperature conditions
Fiber Type: Polyacrylonitrile (PAN) acrylic monofilament
Fiber Length: 3.2 mm precision cut Diameter: .0.008–0.012 mm
Handling and Storage
WelPAN™ should be stored in a clean, dry environment and protected from moisture prior to use. Packaging should remain sealed until blending to prevent contamination. Standard bulk material handling practices should be followed, and personnel should consult the Safety Data Sheet for appropriate safety procedures and personal protective equipment requirements.
Packaging
- WelPAN™ is packaged in 4 – 10 lb bags per box. 30 boxes per pallet.
