EQUIPMENT FOR SWABBING WELLS ON THE PRODUCTION LINE Russian patent published in 2018 - IPC E21B43/25 F04B47/02 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil industry and can be used for swabbing on the production well string with viscous products, on which the possibility of gas-oil manifestations is excluded. Equipment for swabbing wells on the production line includes a tee with a flush line connected from below to the bottom of the wellhead, and from above is equipped with a junction box with a lubricator equipped with an entry sensor and a cable gland cleanser. At the same time, downhole equipment that consists of a swab, equipped with a load below, and on top with a fishing nipple and a safety rupture element, a pusher and a cable lug for connecting with the rope, is lowered on the rope. Lubricator for the hermetic entry into the connection unit from below is equipped with a tip with an external sampling at the top, a spring-loaded downward glass, spring-loaded outward dies and a central passageway of a larger diameter than the rope tip, and a smaller diameter than the pusher. Connection unit is made in the form of a hollow body with an inner annular groove adapted to interact with the dies after insertion of the tip into the connection unit, and in the connection unit from above there are side openings for the input of the thrust fork configured to interact with the tip sampling and its fixation in the connection unit. Fishing nipple is connected to the swab with a quick-release connection. Between the rupturing element and the pusher, a container with a self-contained depth gauge is mounted on the quick-release couplings. Safety rupture element is made in the form of a quick-release connection tip mounted above the fishing nipple, with a voltage concentrator in the form of a thinning of the tip body, over which a rupture occurs when the permissible load is exceeded. Between the cable lug and the pusher a cargo bar is installed, the length of which is commensurate with the length of the lubricator.

EFFECT: increasing the efficiency of the use of aggregates for swabbing wells and expanding the functionality through the provision of the possibility of reinstalling the elements of equipment for swabbing on the production column and for swabbing in the tubing string in the field directly at the well by the team of the unit.

1 cl, 5 dwg