PACKER Russian patent published in 2021 - IPC E21B33/128 

FIELD: oil industry.

SUBSTANCE: invention relates to the oil industry, namely to downhole devices for multiple pressure testing of a pipe string in a well, including a small diameter. The packer contains a borehole with a shaped groove on the outer surface with alternating axial short and long sections, interconnected by a closed shaped section, a support, a sealing collar mounted with the possibility of axial movement on the outer surface of the rod having a central channel, a cage with a guide pin located in a figured groove, and a centralizer. The sealing collar is fixed with a support from below, and from above by housing spring-loaded to the head in the axial direction and made with the possibility of axial movement along the stem. The head is equipped with a centralizer along the circumference. Above the sealing collar, there is an additional undocking unit containing a fishing head.

EFFECT: invention is aimed at reducing the duration and labor intensity of the packer installation process.

5 cl, 7 dwg