A downhole stimulation system and a drop device

摘要

The present invention relates to a downhole system (100) for installation in a borehole (36) for creating a cased well (2). The downhole system comprises a plurality of casing sections (101) mounted to form a casing string (102), and a plurality of sleeves (3), each sleeve comprising a sliding sleeve part (103) and a tubular part (104) mounted as part of the casing string comprising at least one opening (32), the sliding sleeve part (103) being movable from a first position in which the sliding sleeve part closes the opening (32) to a second position in which the fluid is allowed to flow through the opening (32). Each sleeve (3) comprises a sleeve activation means adapted to move the sliding sleeve part (103) from the second position to the first position.