Sand Screens Keep Sand Participles Out and Ensure Smooth Production

Sand screen is a commonly used solution to control sand production in wellbores.

Sand Screen is an integral part of most downhole sand control systems. Acting as a filter, it allows reservoir fluid ingress to the completion string while keeping the sand out.

• Precise particle size control
• High strength and durability
• Excellent corrosion resistance
• Superior erosion resistance
• High pressure tolerance
• Special discount for large orders and various promotion campaigns

Why we need a sand screen?

Oil and gas reservoirs exist in all types of sands. Besides, wells drilled through unconsolidated rock formations that may collapse into the wellbore. Sand production in wellbores can lead to production impairment due to sand plugging, erosion to completion string and downhole tools and damage surface facilities, etc. Sand screens inserted into the wellbore can enhance wellbore stability, block sand out and optimize productivity when run in unconsolidated formations. Therefore, sand screens are highly recommended in producing oil, natural gas and water.

Application

Sand screen is a commonly used method to control, mitigate and prevent sand production in wellbores and extend the service life of wellbores. It is highly recommended in the following situations:

• Openhole and cased-hole completions
• Vertical, deviated and horizontal completions for oil and gas wells
• Inflow and injection control wells
• Thermal applications
• Standalone and gravel pack completions

Sand screen is widely applied in oil or water wells.

Sand screen installation location

Wire Wrapped Screen

Wire wrapped screen has excellent corrosion resistance and superior erosion resistance.

Wire wrapped screen is one of the most commonly used sand screens around the world. It consists of a base pipe and a filter jacket or only a filter jacket. It adopts world advanced all-weld technology to ensure that wrap wire welded to ribs at every contact point, which provides a robust solid filter for use in both cased and openhole environments. It creates a continuous slot opening and allows water or oil entering well freely in ample quantifies while keeping most of the sand and gravel out of the well.

Structure

• Base pipe: The base pipe is a perforated pipe that conforms to API standards, which is designed to optimize flow while retaining strength.
• Filter jacket: It has longitudinal ribs that support the wrap wire and serve as a drainage layer, ensuring an open flow path to the base pipe perforations. The keystone-shaped wire decreases the risk of screen plugging associated with particles lodged between wires. The wire wrap is manufactured separately from the base pipe, and the wire wrapped jacket is then placed over the base pipe and welded to the base pipe at both ends.

Details

The cross section of the wire wrapped screen

Wire wrapped screen diagram

Advantages

• All welded structure, high mechanical strength
• Superior corrosion and erosion resistance
• Large open flow area
• Self-cleaning function lowering the risk of plugging
• High flow rate with low pressure drop

Specification

• Materials: stainless steel 304, 304L, 316, 316L, or upon request.
• Wire width: 0.090" (2.286 mm)
• Slot depth: 0100" (2.54 mm)
• Slot opening: 0.175 mm to 1.0 mm in increments of 0.10 mm with accuracy of 0.05 mm. Slot size is designed based on formation grain sieve analysis results to ensure optimal sand control performance.
• Length: up to 6 meters.
• End connection: thread connection, flange connection and baffle ring connection

Wire wrapped screen thread connection

Wire wrapped screen flange connection

Wire wrapped screen baffle ring connection

Precise Micropore Composite Screen

Precise micropore composite screen optimizes inflow area and filtration efficiency to provide better sand control performance.

Precise Micropore Composite Screen is designed to filter a high percentage of sands and is used in high velocity wells. It adopts an all metal design with a base pipe, a filter jacket and an outer protective shroud to provide better performance than a wire wrapped screen in unconsolidated formations. It is especially true when it comes to filtering fine particles in formations with more poorly sorted sands. The unique construction of this screen optimizes inflow area and filtration efficiency to provide superior sand control completion performance.

Precise micropore composite is an ideal choice for wellbores in unconsolidated formations.

Precise micropore composite screen has high accuracy and reliability in sand control.

Structure

• Base pipe: The base pipe is a perforated pipe that conforms to API standards, which is designed to optimize flow while retaining strength.
• Filter jacket: The filter jacket is the core of the sand control mechanism and is engineered to meet the filter requirements. It usually consists of an inner support/drainage layer, multiple layers of filter mesh and an outer support/drainage layer. All these layers are made of metal mesh in forms of plain, twill or dutch woven.
  • The inner support/drainage layer: It is placed between the base pipe and multiple layers of filter mesh, which provides even distribution of flow between the base pipe and multiple layers of filter mesh and has the function to support multiple layers of filter mesh.
  • Multiple layers of filter mesh: It is designed to meet the requirements of sand control. A combination of various filter materials can be used to meet different filter requirements to the greatest extent. Its structure can be changeable according to the actual conditions of stratum.
  • The outer support/drainage layer: It is placed between the filter mesh and the outer protective shroud, which is specially designed for enhancing drainage under the final layer.
• Outer protective shroud: The outer protective shroud can be either a perforated pipe or a bridge-type pipe, which protects the filter mesh during deployment and provides support during reverse pressurization.

Details

The bridge-style pipe precise micropore composite screen

The perforated pipe precise micropore composite screen

Advantages

• High accuracy of filtration, high reliability in sand control
• High permeability, larger flow area and high production rate
• Even flow of production fluid across the whole screen
• Small outer diameter, light weight
• Acid and alkaline resistance and high temperature resistance
• Excellent plugging resistance and backwash capability

Specification

• Materials: stainless steel 304, 304L, 316, 316L or upon request.
• End connection: thread connection, flange connection and baffle ring connection

Bridge Slotted Screen

Bridge slotted screen is an ideal filter for water well drilling.

Bridge Slotted Screen is a kind of well filter pipe with bridge holes. It is an economical alternative to other types of sand screens. It has high mechanical strength, a variety of connection styles and easy operation performance. It is an ideal filter for water well drilling. It may work with a perforated pipe to enhance its mechanical strength. In addition, it can also be covered with an anti-corrosive coating to extend its service life.

Details

The structure of the bridge slotted screen

Detail of the bridge slotted screen

Specification

• Material: stainless steel 304, 304L, 316, 316L or upon request.
• Outer Diameter: 50–300 mm
• Slot: 0.25 mm (±0.05 mm)
• Welding style: spiral seam welding and straight seam one
• End connection: thread connection, flange connection and welding connection
• Any size can be customized upon request.

Bridge slotted screen of spiral seam welding>

Bridge slotted screen of straight seam welding

Bridge slotted screen thread connection

Bridge slotted screen flange connection

Bridge slotted screen welding connection

Advantages

• Staggered slot layout for higher stability
• Customizable slot width for most efficient sand control
• Unique slot design that greatly reduces clogging
• Light weight and cost effective
• Various ways of connection
• Easy operation and suitable for field production