Abstract: The present invention relates to a contamination-resistant sand control apparatus and a method for preventing the contamination of sand control devices. More particularly, the invention involves placing time-release treatment chemicals in a flow channel that communicates with the sand control device. The treatment chemicals take the form of time-release capsules or are coated on a surface of the sand control device and may include scale inhibitors, paraffin inhibitors, asphaltene inhibitors, enzymes and the like. The treatment chemicals prevent and clear the formation and buildup of particulates on a surface of the sand control apparatus.

Abstract: Apparatus and methods are disclosed for sequentially treating multiple zones in underground formation in a single trip of the well treatment work string. In the one embodiment, the work string includes composite tubing having electrical conductors embedded within the walls, the conductors enabling power transmission and two way communication between the surface and the sensor or detectors downhole so that real time data can be sensed and communicated. Isolation packers are actuated via electrical signals from the surface communicated to the bottom hole assembly via the conductors. A detector located in the bottom hole assembly may be provided to detect perforations or other anomalies in the casing, such as joints, enabling the surface controller to position packers properly in blank segments of casing so that well intervals can be properly isolated and the adjacent formation effectively treated.