CONTAINER FOR FEEDING INHIBITOR INTO WELL (VERSIONS) Russian patent published in 2017 - IPC E21B37/06 

FIELD: oil and gas industry.

SUBSTANCE: according to both version the container consists of a body 1, in which walls there are perforated holes 2. The holes 2 in the body 1 are made in its upper 3 and/or in middle 4 parts. The body 1 is provided with perforated bottom 5 and the upper 6 plugs at the ends, or perforated lower and blind 20 upper plugs. At least one cylindrical container 7 is placed inside the container, filled with inhibitor 8 and provided at the ends with blind cover 9 and a bottom 10. The vessel 7 is perforated in radial direction. The diameter of holes 11 is 1-7 mm. According to the second version, the vessel 7 is made in the form of a capsule with end projections, preferably rounded close to hemispherical, with a blind cover and a blind bottom integral with the capsule body. The capsule is perforated in side areas, the holes can be slightly displaced to the end projections and thereof size is 1-7 mm. In both variants the containers are not fixed in the body 1 and form gaps between their outer walls and inner surface of the body 1. The ratio of total area of holes 2 in the body 1 of the container to the total area of holes 11 (or 19) in all vessels 7 contained within the body 1, must be 1 k (0.003-70), respectively.

EFFECT: increased inhibitor dosage duration due to uniformity of inhibitor dissolution under different temperature wellbore conditions and at different content including increased content of mechanical impurities in formation liquid.

16 cl, 1 tbl, 2 dwg