AlfaPolymer
Description
AlfaPolymer is a high-tech AlfaDirect wrapped sand screen product combined with expandable polymer technology. The main idea is to use special materials that can take an expanded shape and create close contact with an open well bore.
This feature of polymer sand screen reduces the risk of sand production by reducing voids around the well during expansion. The expanded polymer shell remains permeable to the oil fluid, which ensures the oil recovery. A special activation fluid is used to activate the polymer expansion process.
The idea of a polymer expansion sand screen is based on a number of gravel sand screen designs, in which fluid filtration occurs in the area of the gravel part of the sand screen, which allows achieving high parameters for permeability and purification of the fluid from mechanical impurities. But the implementation of such gravel packing is quite expensive and not always successfully applied. In this regard, polymer expanding sand screens have good prospects for their implementation in production technologies in the oil and gas industry.
Parameters
- Base screen: AlfaDirect direct wire wrapped sand screen;
- Pressed hardened polymer pre-installed on top;
- Base pipe 102 mm for OS 152.4 mm and base pipe 139.7 mm for OS 215.9 mm;
- Polymer sections length: 2000 - 9000 mm;
- Centring system for each system depending on design of AlfaPolymer;
- OD: 146 mm (over centralizers), 143 mm (over polymer);
- Polymer expanding restrictions system: stop rings;
- Expansion ratio: over 40%.
Usage
AlfaPolymer has a wide range of applications for sand control. It can be used in non-uniform reservoirs of oil fields.
Benefits
- Replacing costly and risky gravel packing;
- Used to create a permeable system that prevents sloughing of sand;
- The system does not violate the integrity of the rock during well operation (natural destruction of the rock is excluded, since there is no space for sand migration);
- A durable artificial system that allows to work at a given depression without the risk of massive sand production;
- Relatively safe technology for running complex ERD wells.
