DEVICE FOR WELL CLEANING Russian patent published in 2002 - IPC

Abstract RU 2186947 C2

FIELD: oil producing industry; equipment applicable in cleaning of bottom-hole formation zone from drillings, sand, paraffin, resins and other accumulations difficult to remove by washing. SUBSTANCE: device consists of hollow rod made with two rows of radial channels separated by solid transverse partition. Radial channels in initial position are closed by movable spring-loaded bushing with cylindrical hollow inside it. Rod is connected with packer expanding cone. Device body has check valve and shank, and it is connected with packer expanding cone. Hollow rod has knocking-off valve. In initial position, expanding cone is connected with body and hollow rod by shear members. In working position, expanding cone is engageable with body projection, and hollow rod is engageable with projection of expanding cone. EFFECT: simplified design, higher efficiency of cleaning. 1 dwg

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RU 2 186 947 C2

Authors

Jusupov I.G.

Gabdullin R.G.

Strakhov D.V.

Asadullin M.F.

Dates

2002-08-10—Published

2000-10-30—Filed