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2 039 204

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IPC

(21) (22)

Application

4951382/03, 1991-06-28

(22)

Actual filing date

1991-06-28

(45)

Published

1995-07-09

(72)

Inventor

Ehdel'Man Ja.A.Perlov G.F.Messer A.G.Makushin V.V.Surkov D.V.Gotlib M.V.Basovich V.S.Berdichevskij V.I.Pisarnitskij A.D.Guberman D.M.Nikolaev V.F.

(73)

Holder

Nauchno-Issledovatel'Skij Institut Burovoj Tekhniki VniibtKol'Skaja Kompleksnaja Geologorazvedochnaja Ehkspeditsija Sverkhglubokogo Burenija

CORE A BOREHOLE TOOL AND METHOD OF ITS PRODUCTION Russian patent published in 1995 - IPC

Abstract RU 2039204 C1

FIELD: drilling. SUBSTANCE: core collector of the tool is made in the form of corrugated sheet a pipe. Grooves of the sheet are used for liquid passing. Outer grooves are used for liquid passing in direction to bottom hole and inner grooves from bottom hole. Ratio of grooves areas, their locations and conditions of continuity of inclined grooves are given. EFFECT: core a borehole tool and its production method are used in boreholes drilling. 5 cl, 2 dwg

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RU 2 039 204 C1

Authors

Ehdel'Man Ja.A.

Perlov G.F.

Messer A.G.

Makushin V.V.

Surkov D.V.

Gotlib M.V.

Basovich V.S.

Berdichevskij V.I.

Pisarnitskij A.D.

Guberman D.M.

Nikolaev V.F.

Dates

1995-07-09—Published

1991-06-28—Filed