FIELD: oil and gas industry, particularly to clean inner casing pipe surface before oil and gas well completion.
SUBSTANCE: device comprises at least one brush body formed of rigid material selected from group consisted of high-density polyurethane, high-density polypropylene, nylon, orlon, phenolic resin-based materials, rigid caoutchouc, aluminum, combinations thereof, high-density polyethylene and wood in predetermined combinations. Device also has at least one brush arranged on outer body surface or near or inside the body. The brush is shaped to provide contact between the brush and inner casing pipe surface during device lowering into casing pipe of well penetrating oil field. At least one cementing plug of elastomeric material is also provided. The cementing plug is dimensioned to provide inner casing pipe surface cleaning.
EFFECT: increased efficiency due to provision of brush bristle contact with casing pipe during device lowering in well.
4 cl, 9 dwg
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