MULTIPOSITION TOOL FOR FORMATION FRACTURING WITHOUT PERFORMING ANY ADDITIONAL LIFTING AND LOWERING OPERATIONS Russian patent published in 2012 - IPC E21B43/26 E21B34/06 

FIELD: oil and gas industry.

SUBSTANCE: formation fracturing tool has a lowering position and two operating positions. In the through channel of the formation fracturing tool there located is a coupling having a passage with possibility of its being aligned with the first passage in the tool body, and namely in the first operating position when the formation fracturing operations are being implemented. The housing includes the second passage with restricted section, which is located in the housing and closed with the coupling at implementation of formation fracturing operations. After the formation fracturing operations are completed, the coupling is moved by means of the return mechanism of the formation fracturing tool from the first operating position to the second operating position in order to implement the production operations. The first passage is closed in the second operating position, and the coupling passage is combined with the second passage. The movement of the coupling from the first operating position to the second operating position is performed without any need for performing any additional lowering and lifting operations in the well using any other tools and instruments.

EFFECT: reduction of labour intensity for formation fracturing operations.

20 cl, 3 dwg