1. Perforated Base Pipe

API 5CT casing or tubing can be drilled with CNC equipment using staggered, longitudinal, or other specified hole patterns. Hole diameter and density are selected to provide the required flow area without removing more pipe wall than the design permits. The finished holes are normally deburred before the screen jacket is fitted.

2. Wedge-Wire Jacket

The jacket is made by winding V-shaped profile wire around longitudinal support rods and welding the contact points. Because the slot is narrower at the outside surface and opens toward the inside, particles that enter the opening are less likely to become wedged in the slot.

3. End Rings and Collars

End rings or collars secure the screen jacket to the base pipe. Their dimensions and weld details depend on the connection design and the loads expected during running in hole (RIH), including handling, torque, and axial forces.

The base pipe is positioned on a CNC drilling machine and the specified hole pattern is produced around the pipe. Hole position and diameter are checked during production, and burrs are removed from the bore and outside surface so that they do not interfere with flow or screen assembly.

The V-wire is formed around the support rods while the winding pitch is controlled by the welding machine. Slot opening is checked against the purchase specification, and the wire-to-rod contacts are welded as the jacket is formed.

After welding, the jacket is fitted over the perforated base pipe. Where support rings are specified, they are installed at the required spacing to keep the jacket aligned with the pipe during handling and service.

End rings are welded to the base pipe and jacket using the welding procedure specified for the selected materials. The joint is intended to hold the jacket in position and limit flow bypass around the screen ends.

Dầu nặng & Phục hồi nhiệt (NÓI)

SAGD and other thermal-recovery wells expose completion components to repeated heating and cooling. For these services, stainless or duplex screen materials may be considered where the temperature, fluid chemistry, and mechanical loads justify their use. The selected alloy and base pipe still need to be checked against the actual completion conditions.

Giếng hydrocarbon áp suất cao sâu

Deep wells can impose substantial collapse and tensile loads on the screen assembly. A heavier-wall L80, P110, or other specified base pipe can be selected when the calculated loads require it. Collapse resistance should be established from the actual pipe dimensions, cấp, connection and well conditions rather than from a single nominal pressure figure.

Giếng ngang mở rộng

Horizontal completions can place the screen under drag, uốn, and side loads during running. A rigid base pipe helps carry these loads, while centralizers and the running procedure are used to control contact with the wellbore.

An 8-round connection is commonly used where the casing design calls for this thread form and the expected joint loads are within its rated capacity.

Longer or premium connections may be selected when higher joint strength or improved sealing performance is required. The connection should be rated as a complete pipe-and-coupling assembly.

Buttress or other high-strength connection profiles are used when the completion design calls for greater axial load capacity. The choice should follow the casing program and connection manufacturer’s rating.

Thread protectors are fitted to exposed pin and box ends where applicable. They help keep dirt and handling damage away from the connection surfaces.

The screen jacket can be wrapped and restrained with suitable protective material to reduce impact from adjacent pipes and lifting equipment during transport.

Depending on shipment size and destination, screens may be packed in treated wooden cases or bundled on steel frames. Spacers are used where necessary to keep adjacent screen surfaces from rubbing against each other.

Use suitable lifting slings and protectors, and keep elevator dies or slips from contacting the wire jacket directly. The screen surface should not be used as a lifting or gripping point.

Apply the specified thread compound to the connection surfaces in accordance with the casing running procedure. Keep excess compound away from the screen slots and verify makeup according to the connection specification.

Run the assembly at a controlled speed to limit surge effects. Trong giếng lệch, centralization and the planned RIH procedure can reduce contact between the screen and the low side of the hole.