Slotted Liner: High-Efficiency Filtration for Demanding Environments

The slotted liner is a precision-engineered tubular component extensively used in oil, gas, and water wells for effective sand control and fluid filtration. Manufactured using advanced laser cutting technology, it ensures non-contact processing to prevent deformation of the base pipe. This process produces high-precision slots with vertical, smooth, and burr-free edges, in full compliance with API Standard. The slotted Liner is engineered to withstand harsh environments while optimizing fluid flow and maintaining structural integrity.

Slotted liner

Category

Slotting Pattern

Staggered slotted liner

The slotting pattern of slotted liner is straight.

Straight slotted liner

The slotting pattern of slotted liner is gang.

Gang slotted liner

Slot Shape

Straight slot
Straight slot has straight sides with equal width through the wall of the casing. It is normally used in consolidated formations or when slots of 0.030" or wider are specified. Higher resistance to wear and more economical than keystone.

Straight slot

keystone slot
Keystone slot is like a reversed “V” with narrower spacing at the liner surface and wider spacing in the inside casing wall. This shape allows for sand grains to bridge across the opening and ensures all the particles that enter into the hole will completely go through the wall. Keystone shaped slots substantially reduce the possibility of clogging and improve work efficiency.

Keystone slot

Specifications

Standard: API 5CT
Grade: J55, K55, N80, L80, P110 etc.
Outside Diameter: 2-3/8" – 20"
Thickness: Max 16 mm
Slot width: 0.1–6 mm
Slot length: 30–500 mm
The open area: According to customer's requirements
Pipe length: 0–12 m
End connection type: Plain ends, flange or threads

Slot Density

Open area refers to the percentage of the pipe surface that is open per unit length (%), which directly impacts sand control performance. Open area is a critical factor influencing the sand control capability of slotted liners.

Once the open area, slot width, and liner diameter are determined, the open area per foot can be calculated using the following formula:

Formula for calculating open area per foot.

N represents slot density, or the number of slots per foot.
D represents the outer diameter of the liner (in inches).
C represents the percentage of open area.
W represents slot width (in inches).
L represents slot length (in inches).

Features

Flexible diameter. Customized according to borehole size and pump specifications to ensure optimal compatibility.
Slot customization. Slot width, length, and density can be tailored to match filtration media or gravel size.
Mechanical strength. Compressive and tensile strengths are engineered according to installation depth to ensure reliability.
Standard length. Optimized for containerized transportation.
Connection methods. Welding, API threads, or flange connections ensure secure assembly.

Applications

Oil and gas wells: It filters 99% of sand particles, reducing pump wear and maintenance costs and serves as a core sand control tool in horizontal wells and heavy oil thermal recovery.
Water wells: It prevents aquifer sediments from entering.
Geothermal systems: It controls particulates in high-temperature fluids.

Gallery

2 staggered stainless steel slotted liners

Staggered slotted liner

Straight slotted liner

Bundled with chains and nylon rope

Truck transportation

Get In Touch

Just tell us your requirements and your problems, we will help you solve them. Our professional sales representatives will provide you the suggestions of sand control screens and applications.

Queelian Wong +86-15963806918/+86-0633-3691680

E-mail sales@goldoxwiremesh.com

Address No. 252 Beijing Road Rizhao City, Shandong Province, China.