DEVICE FOR FORMATION TREATMENT IN HORIZONTAL WELL Russian patent published in 2015 - IPC E21B33/12 

FIELD: oil and gas industry.

SUBSTANCE: invention is referred to oil and gas producing industry, and namely to devices for separation of formations in a horizontal well at separate injection of different reagents to them. The device for formation treatment in horizontal well comprises a packer including a case feedthrough in axial direction with an elastic cup, from above the packer case is fixed rigidly to a disconnector, that includes a barrel with radial openings with upper and lower threads, a slide valve placed inside the barrel and coupled with it by a shier tie, and a rod, the slide valve is complete with plug catching baffle for throwing element, which is thrown inside the device before treatment of the formation placed above the packer, the lower ring made as a cover screwed onto the lower thread of the disconnector barrel, at that from below the cover is equipped with exterior thread to connect the feedthrough packer with the case. At the packer feedthrough case there are toothed notches, and below in the feedthrough case there are through grooves, at that at external surface of the feedthrough case there is a pusher equipped with a locking ring above the toothed notches of the feedthrough case, at that by means of shear bolts inserted into through grooves of the feedthrough case the pusher is coupled to a movable saddle mounted inside the feedthrough case, moreover the movable saddle is complete with return valve passing bottom-up, at that the pusher may have axial impact on the elastic cup pre-assembled of alternating rubber and metal rings with axial compression and radial expansion outside rubber rings of the packer elastic cup; at that at axial movement of the pusher downwards together with the movable saddle in regard to the feedthrough case the pusher may fix the feedthrough case by the locking ting in toothed notches with destruction of shear bolts in the moving saddle, moreover the lower metal ring is fixed to the feedthrough case by shear tie. The slide valve is fixed rigidly to it by the rod as well as by axial openings in circumferential direction, at that the cover is equipped with axial central opening that may interact hermetically with the slide valve rod, at that the throwing element is made as a top cementing plug, besides the disconnector barrel is equipped with two inner circular grooves with split spring-supported locking rings capable to fix top cementing plug by its upper end upon axial movement of the slide valve in regard to the disconnector barrel.

EFFECT: excluded unsealed setting of the device packer in the horizontal borehole or loss in the packer sealing in process of the device operation, as well as expanded functionality of the device and improve reliability of its operation.

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