BOTTOM HOLE ARRANGEMENT OF WELL Russian patent published in 2009 - IPC E21B43/11 

FIELD: oil and gas production.

SUBSTANCE: invention refers to well development and operation of multi-bed deposits of hydrocarbons, particularly to process and engineering of simultaneous-separate operation of several objects with one well; it can be implemented for pull-out of hole, for example for perforating, acid treatment, and hydraulic breaking of reservoir (HBR) operated with one well. Bottom hole arrangement of well for perforating of reservoirs of a multi-bed deposit consists of perforators, connected to a flow string and equipped with seats for a valve for alternate actuation of perforators; the seats are located on side surface of a single tube body. A blind plug with a fishing head is installed in the seat of the tube body in its lower part; also each of perforators is equipped with a valve turning a body with a slide valve on. Slides of valves are connected with a common rod by means of drivers; the common rod consists of separate sections of adjusted length facilitating alternate opening of channels of perforator valves. Dimensions of seats for slides of valves differ and increase in the direction from a lower valve to an upper one. The rod is equipped with an indexing mechanism ensuring its arrangement corresponding either to opening of one of the valves of the perforator or to closing all of them, or to setting rod into the lowest position, or to the position of extracting. In its low part the rod is equipped with a grip designed to interact with the fishing head of the plug. In upper part of the rod there is the fishing rod which facilitates reciprocal motion of the rod by means of a down hole tool. Internal surfaces of bodies of the valves are equipped with grooves for fixation of inter well equipment installed in openings of bodies.

EFFECT: upgraded efficiency of reservoir effecting operations, reduced time of operations.

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