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2 039 236

(13)

C1

(51)

IPC

(21) (22)

Application

5061161/03, 1992-09-01

(22)

Actual filing date

1992-09-01

(45)

Published

1995-07-09

(72)

Inventor

Elpaev N.A.Rapin V.A.

(73)

Holder

Nauchno-Proizvodstvennaja Firma

PROTECTING HELL OF BOREHOLE DEVICE Russian patent published in 1995 - IPC

Abstract RU 2039236 C1

FIELD: oil extracting industry. SUBSTANCE: borehole device body is made of assembled of spaced in respect to each other in axial direction rigid staple-shaped rings of smaller and bigger diameters, located coaxially forming flexible cylinder. Ring of bigger diameter are overlapping intervals in row of smaller diameter rings. Soft soundproof binding material is applied on inner and outer surfaces of cylinder and in cavity between rings. EFFECT: device is used in geophysical examinations of horizontal boreholes. 1 dwg

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RU 2 039 236 C1

Authors

Elpaev N.A.

Rapin V.A.

Dates

1995-07-09—Published

1992-09-01—Filed

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