Patent RU-2611798-C1 (RU)
Title: Wireline drillable packer with setting tool
Inventor: STRAKHOV DMITRIJ VITALEVICH
IPC: E21B33/12
Filed: 2015-12-08
Granted: 2017-03-01
Abstract: FIELD: oil-and-gas industry. 
     SUBSTANCE: invention relates to a drillable packer with a setting tool. The wireline drillable packer with the setting tool, comprises a barrel with a hollow piston, a fairing divided a hollow piston into a fluid-filled lower cylinder with a high pressure cavity and an upper cylinder with a low pressure cavity, a sealing member of the packer with upper and lower stops, upper anchor assembly interacting with the lower cylinder, and the upper anchor assembly is equipped with a conical sleeve and slips, which are mounted with the possibility of radial expansion between the upper stop and the conical sleeve as they get closer, and the barrel is rigidly joined with the hollow piston and the lower stop, and made as an assembly of a packer body and a rod joined together by a shear element, the rod is connected with the hollow piston, while the hollow piston is rigidly connected with the upper cylinder, which is provided with an additional piston, and the lower cylinder is designed to move downward relative to the hollow piston and the bearing by the pusher against the top stop, limited by an external stop mounted on the rod, the additional piston is equipped with a stem tightly inserted in the hollow piston and it is arranged in the upper cylinder, and the rod is made hollow and plugged from the bottom when the rod cavity is interconnected with the high pressure cavity - underpiston cavity of the lower cylinder and the conical sleeve is designed to interact with the sealing element from above, the top stop has a possibility of fixing after the movement relative to the outer circular incisions of the housing by split keys or by a spring-loaded washer located in the circular groove of the upper stop, wherein the wireline drillable packer with setting tool is also equipped with bottom anchor assembly comprising a conical bushing and slips, which are mounted with the possibility of radial expansion between the lower stop and the conical sleeve as they get closer, and the conical sleeve of the lower anchor assembly interacts with the sealing element from the bottom, and the additional piston rod is hollow and plugged the bottom, the inner cavity of the rod through the holes is interconnected with the low pressure cavity of the upper cylinder, thereby increasing the cylinder volume and the pressure drop in the well and in the low pressure cavity. The sitting tool is equipped from the top with a knock-off valve for interconnecting after opening of the knock-off valve of the low pressure hollow with the well space. The upper cylinder fairing has a possibility to move down after the opening of the knock-off valve and connected with a cable via a take-off assembly, the moving part of which interacts with a knock-off pin of the knock-off valve. The take-off assembly is provided with an electric motor with a screw-nut pair coupled with a movable part of the take-off assembly which by means of electrical signal destroys the knock-off pin of the setting tool and opens the hole of the knock-off valve for interconnection between the low pressure chamber and the well space. The knock-off valve opens only after the electrical signal via the cable due to destruction of the knock-off pin of the knock-off valve by the movable part of the take-off assembly. 
     EFFECT: invention allows to simplify the design and improve the performance. 
     1 dwg