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2 024 732

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C1

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IPC

(21) (22)

Application

4950910/03, 1991-06-28

(22)

Actual filing date

1991-06-28

(45)

Published

1994-12-15

(72)

Inventor

Surkov D.V.Ehdel'Man Ja.A.Messer A.G.Gel'Fgat M.Ja.Nikolaev V.F.Makushin V.V.

(73)

Holder

Nauchno-Issledovatel'Skij Institut Burovoj Tekhniki

CORE CATCHER Russian patent published in 1994 - IPC

Abstract RU 2024732 C1

FIELD: drilling engineering. SUBSTANCE: core catcher has case with ports, cross-pieces located between the ports and rotatable levers 5, which are provided with a groove on the back part, mounted on shafts. The case is made of two rings 2 with grooves and stands 3 with shanks received in the grooves of the rings. Rivets are used as rollers. Stands 3 have rectangular cross-section and are provided with openings for the rivets. The case is assembled using the rings which have the grooves and stands with the shanks. The levers and rollers are mounted on the stands. For making so, the shanks of the stands are inserted into the grooves of the rings. The end of the roller inserted into the openings of the lever and stand is riveted. EFFECT: enhanced reliability. 3 cl, 2 dwg

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RU 2 024 732 C1

Authors

Surkov D.V.

Ehdel'Man Ja.A.

Messer A.G.

Gel'Fgat M.Ja.

Nikolaev V.F.

Makushin V.V.

Dates

1994-12-15—Published

1991-06-28—Filed

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