一、Slotted Pipes(开槽管)

Introduction

Slotted pipe are used for oil and gas wells. Steel casing pipes and tubing are applied to furnishing and installing cased tunnels, where they indicate to pass other utilities or obstructions without open excavation. Steel casing pipes and tube have smooth wall and a minimum yield strength of 35,000 psi. Corrosion-proofing water-based paint is applied on the outside pipe surface to protect against atmospheric corrosion during transportation and storage.

Advantages

1.Varied slot sizes and patters and shapes.

2.Lower cost than wire wrapped screens, in some situations slotted liner now used for the same functionality as sand control screens.

3.Simple installation due to no outer screen added.

4.Low risk of collapse and deformity.

5.The slotted pipes control sand better, which are suitable for the well with sand diameter more than 0.3mm.

6.The slot can be longitudinal and vertical and the section of the slot can be parallel and trapezoid types, which creates wide open area.

7.Easy to operate and to be connected with larger inner diameter.

Applicstions

1. Where well productivity is small and economics cannot support the use of screens.

2. Ideal for sand control for low fines and clay reservoirs.

3. Excellent sand control choice for thermal heavy oil &bitumen reservoirs.

4. Suitable for high CO2/H2S, SAGD, CSS, and CBM.

二、Sand Control Well Screens(防砂井筛管)

Introduction

Sand Control Screens consist of perforated base pipe, middle leak off mesh, wire mesh or metal wool and outside stainless steel protective tube. Perforated base pipe has designed hole. The hole on outside protective tube could be round or bridge slot or customized according to customers' requirements.

Advantages

1.Multi-layer stainless steel filter media has been adopted, with high reliability and collapse resistance in sand control.

2.High permeability, larger area flow and production rate is high.

3.Small outer diameter, light weight, easy to push along the long horizontal section.

4.Anti-acid and alkaline, anti-high temperature, longer service life.

5.Simple construction, easy for operation

6.Multi-layer Sand Control Screens samples deformed to 75% and 40% of original diameter with virtually no increase in sand production.

Applications

Multi-layer Sand Control Screens are mainly applied in cased-hole completion of vertical wells, directional wells and open-hole well.

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