API Oil Well Laser Cut Slotted Liner

API oil well laser cut slotted liner is a sand control screen specifically designed for oil and gas wells, conforming to American Petroleum Institute (API) standards (such as API 5CT or API 5L). It utilizes laser cutting technology to create uniform and precise slots (typically 0.1-4mm wide) on the pipe body, used to control the entry of formation sand during oil and gas extraction while allowing oil and gas fluids to pass through. The following is a detailed introduction:

1. Function

Laser cut slotted liners are used for:

• Sand Control: Preventing sand particles from the formation from entering the well, reducing equipment wear and blockage.
• Oil and Gas Flow: Allowing oil and gas fluids to pass through the slots into the well, ensuring production efficiency.
• Wellbore Stability: Providing structural support to prevent wellbore collapse, especially suitable for horizontal wells or loose sandstone reservoirs.

2. Structure and Features

• Base Pipe Material: Typically uses API standard carbon steel (such as J55, K55, N80) or stainless steel (such as 304, 316L), with high strength and corrosion resistance, suitable for high temperature and high pressure or corrosive environments.
• Slot Design:
  • Slot Type: Straight, trapezoidal (wedge-shaped) or Keystone type. Trapezoidal slots are narrow on the outside and wide on the inside, reducing the risk of blockage.
  • Slot Distribution: Can be linear, staggered or spiral, optimizing flow area and sand control performance.
  • Slot Precision: Laser cutting ensures precise slot width (error ±0.03mm), smooth edges without burrs, reducing fluid resistance.
• Specifications:
  • Outer Diameter: 1.5 inches to 18 inches (50-500mm).
  • Length: Single section ≤15m.
  • Slot Width: 0.1-4mm, customized according to formation sand particle size.
  • Wall Thickness: ≤20mm.
• API Standard: Complies with API 5CT (casing and tubing) or API 5L (line pipe) requirements, ensuring quality, strength and durability.

3. Manufacturing Process

• Laser Cutting Technology: Uses CNC-controlled laser cutting machines or dedicated laser equipment, non-contact cutting, uniform slots, smooth edges, avoiding burrs or deformation caused by traditional mechanical cutting.
• Quality Control:
  • All slots are deburred, cleaned and drift tested internally to meet API standards.
  • Each slot is visually inspected to ensure no blockage or defects.
  • Threads and couplings are cleaned and lubricated to prevent damage during installation.
• Customization: Adjust slot width, quantity and distribution pattern according to oil well geological conditions (such as sand particle size, production requirements)