WATER-SOLUBLE CONTAINER FOR REAGENT DELIVERY TO A WELL Russian patent published in 2023 - IPC E21B37/06 

FIELD: well drilling; oil production.

SUBSTANCE: invention relates in particular to underground well equipment, namely to a container designed to deliver a solid reagent to a well and to supply it to a process or formation fluid. The water-soluble container for delivering the reagent to the well contains a hollow cylindrical body 1 filled with a reagent 4, in which one end of the body is closed by the top cover 2, and the other end is closed by the bottom cover 3, made with a protrusion from the outside in the form of a cone. Housing 1, top 2 and bottom 3 covers are made of a material containing, wt.%: polyvinyl alcohol 9-62; polyethylene glycol 34-85; urea 2-6; glycerine 2-3. Moreover, the top cover 2 is made in the form of a disk, and the bottom cover 3 is made solid in the form of a disk with a protrusion on the outer side in the form of a cone, the opening angle of which is 120 or 150 degrees, while both covers 2 and 3 are pressed into the body 1 and hermetically sealed.

EFFECT: tightness and simplicity of the container design, overcoming the hydraulic resistance of the liquid with less friction losses, complete dissolution of the container.

1 cl, 1 dwg, 3 ex