SUPPORTING MECHANICAL PACKER Russian patent published in 2015 - IPC E21B33/128 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil industry. To increase tightness of the packer installation in the well the supporting mechanical packer contains body, connected telescopically by means of the cuffs with the support nipple with possibility of their axial movement between each other. The body has a ring seal, connecting coupling, adjustment nut with top pressing ring stop installed in the coupling with possibility to adjust position of the ring seal on the body between stops on the adjustment nut and bush connected with support nipple. In the bush a stepped surface is made resting by step projection against collar on the body. On the collar a groove is made, it interacts with shear pins installed in the bush. On the body triangular notches are made, they interact with collet inside which the counter triangular notches and external cone are made. The collet is located in the cavity of the bush with rest against end of the supporting nipple, and is held against axial movements by lock ring with internal cone interacting with the external cone of the collet to fix the ring seal in compressed state, with possibility of movement along the body to length exceeding compression of the ring seal with radial expansion till tight disconnection of the well cavity. The lock ring is made with groove for additional shear pins installed in the bush.

EFFECT: invention can be used to disconnect the well cavities by packers with radial expansion under axial pressure.

3 cl, 1 dwg