DEVICE FOR TRAPPING MECHANICAL IMPURITIES Russian patent published in 2019 - IPC E21B43/08 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil industry, is used in development and operation of oil, gas and injection wells, performance of various process operations, is intended for trapping and retaining mechanical impurities in inter-tube space. Device comprises a casing ending with a nipple part, a case, a coupling, a hollow rod connected in the upper part with a coupling, in the lower part – with a bushing installed between the rod and casing. Rod can move axially relative to the casing. Rod accommodates radial channels communicated with annular chamber between rod and casing accommodating piston interacting with bushing end. Sealing element is installed in the upper part of the stock. In the middle part the stock has an annular ledge interacting with the internal collar of the collet installed in the body.

EFFECT: higher operational reliability of downstream equipment in the well, protection against spillage with mechanical impurities, possibility of installation in any packer assemblies, including self-contained, hydraulic balance and independence from differences of pipe and annular pressures, elimination of piston effect during descent and lifting of device, as well as possibility to control activation and deactivation load.

3 cl, 1 dwg