Introduction Slotted screen is a sand control equipment with slots on oil casing. The flow capacity is determined by slot length, density and distribution pattern. It allows maximum flow area while retaining the minimum strength requirements, thereby ensuring the flowing properties..

Features

 Pipe and slots in the same pipe body, which is convenient when ran downhole;

 High strength, allowing bending to some extend, suitable for various complex well conditions;

 As a completion string, it plays the role of sand control and well wall support;

 Simple construction and low operation cost;

 Minimum slot openingwidth: 0.15mm;

Application

 Conventional casing and open hole completions;

 Loose sandstone and medium-coarse formation sand;

 Oil and gas wells and water source wells with low production requirements.

Specifications

Introduction One type of shrouded metal mesh screen. It is a patented product of COSL. The unique structure jacket can hold sand and maintain good flow-through capability. CMS can be applied in most reservoirs where sand control measures is preferred.

Features

Two layer of 316L stainless steel filter media, high reliability and good anti-damaging performance;

Drainage layer jammed in between the filter media layers, improving the flow properties;

High permeability and porosity, large open area, high sand retention accuracy;

Anti-acid and alkaline, anti-high temperature, long service life;

Compact structure, high strength, easy to run into the long horizontal wells;

Simple construction, easy for operation, lower the completion costs, and increase the rate of success in installation;

Strong resistance to deformation. Maintaining good sand control performance with radial strain up to 40%;

Aperture size of CMS screen usually ranges from 60μm to 300μm.

Application

Stand alone, open hole especially; can also be used for gravel packing and fracture-packing operations;

High production rate wells, water source wells and water injection wells;

High temperature high pressure well and corrosive wells;

Overhaul completion and thermal production wells.

Specifications

Introduction The composite screen is a combination of metal mesh screen and wire-wrapped screen. It is composed of 2 layers of metal filter screens, 2 drainage layers, and 1 layer of wire-wrapped layers. The dual filtration system has excellent sand control performance and erosion resistance. It is suitable for harsh environments such as thermal production wells, high-yield wells and severe corrosion.

Features

Metal mesh filter layer and wire-wrapped filter layer provide dual filter system with good sand control ability;

316L stainless steel wire woven mesh filter structure, high sand control reliability, strong damage resistance;

The setting of supporting drainage network can effectively improve the flow of fluid;

High permeability, high porosity, large effective flow area;

Acid and alkali resistance, high temperature resistance and erosion resistance;

High strength, strong deformation resistance, Maintaining good sand control performance with radial strain up to 40%

High precision sand control, can provide 60μm~300μm filtration rating range of products.

Application

Medium or serious sand production;

Sand control with medium-fine sand or silty-fine sand;

Heavy oil or light oil with medium-high shale content;

High temperature and high pressure wells, thermal recovery wells, corrosive oil and gas wells.

Specifications

Introduction Punched screen consists of stainless punched jacket and base pipe. Punched screen is an ideal substitute of slotted liner due to better anticorrosion performance and relative small OD

Features

Optimized design for perforation on base pipe, high mechanical properties;

Easy RIH due to relative small OD. The OD of jacket is no larger than that of coupling.

Slot width: 0.15-2.0mm;

High precision of slot;

Good performance of anticorrosion, long service life;

Open ratio: 2%~25%;

Side slot, good anti-plugging ability.

Applications

Single pay zone, multi-layer with almost same pressure & lithology, commingled producing multi-layer wells; no limitation of thickness of pay zone;

Cased hole and open hole completion;

Loose reservoir with middle & coarse sand;

Water source wells, thermal production wells, heavy oil wells and corrosive wells.

Specifications

Introduction Wire-wrapped screen is widely used in sand control operation of oil and gas wells, and is mainly composed of stainless steel wire-wrapped jacket and base pipe. It is generally used in combination with gravel packing process allowing good sand control performance and long service life.

Features

Convenient for reverse washing, hard to clog with the design of T-shaped self-cleaning seams

Acid and alkali resistance, long service life;

Full welded structure with high strength;

Minimum opening width 0.15 mm;

High opening rate;

Mature technology for sand control application;

Better adaptability.

Application

It is suitable for medium and low pressure oil and gas wells with high production requirements;

In addition, it is also applicable to water source wells, thermal production wells, heavy oil wells and corrosive wells.

Specifications

Introduction The button screen is directly processed with stepped holes on the base pipe. The reinforced filter material is used to ensure the effectiveness of sand control while effectively reducing the outside diameter of the screen. It is suitable for oil and gas wells that have restricted requirements on the outside diameter of the screen.

Features

Smaller outer diameter, lighter weight, and lower downhole friction;

Large effective flow area, high permeability, and high sand control accuracy;

Simple and convenient operation are conducive to reducing the operating costs and increasing the success rate of downhole operating;

Strong deformation resistance;

Available 60 μm~300 μm filtration rating range products.

Application

Wells with special requirements for the outer diameter size of screen;

Conventional casing completion, especially for open hole completion, can also be used for gravel packing sand control operations;

High temperature and high pressure wells, thermal recovery wells, corrosive oil and gas wells and the well completed again after the workover.

Specifications

Introduction Inflow and sand control screen is a product of COSL screen series. Its core components are inflow control valves (ICD and AICD). Combined with the functions of screen products, it can effectively adjust the production differential pressure in horizontal section, improve the seepage profile in horizontal section, prevent bottom water coning and extend the anhydrous oil production period.

Features

It can effectively delay the rise of water cut and bottom water breakthrough in new wells;

For old wells with high water cut, the seepage profile can be effectively improved;

Simple and convenient operation are conducive to reducing construction costs and increasing the success rate of downhole;

Wire-wrapped inflow control screen and metal mesh inflow control screen tube can be customized according to customer needs

Application

Oil and gas wells with water control demand.

Specifications

Introduction Pre-packed sand control screen is mainly composed of 4 layers of structure, including the base pipe, the inner protective jacket, the gravel layer, and the outer protective jacket.  the completion section is directly ran downhole after the gravel is filled, achieving high-efficiency sand control from packed gravel layer.

Features

The ceramsite filling is completed in the workshop, saveing time and cost of on-site filling operation while ensuring the filling quality.

Improving the effectiveness of sand control in highly deviated wells and horizontal wells;

The pre-filled ceramsite can be customized upon request (conventional ceramsite, lightweight ceramsite, hydrophobic ceramsite, etc. ) ;

The ceramsite in the pre-filling layer is unconsolidated and can move slightly under pressure to achieve self-cleaning.

Application

Suitable for loose sandstone reservoir;

Suitable for sand control operation of cased deformation wells;

Suitable for well completion and sand control with short well section;

High temperature and high pressure wells, thermal production wells, corrosive oil and gas wells and the secondary well completion after workover.

Specifications