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Application

4952556/03, 1991-06-28

(22)

Actual filing date

1991-06-28

(45)

Published

1995-02-20

(72)

Inventor

Surkov D.V.Ehdel'Man Ja.A.Messer A.G.Makushin V.V.Nikolaev V.F.Ravilov F.F.Sianka-Ibarra L.

(73)

Holder

Nauchno-Issledovatel'Skij Institut Burovoj Tekhniki

COLLET CORE CATCHER Russian patent published in 1995 - IPC

Abstract RU 2029055 C1

FIELD: drilling equipment. SUBSTANCE: collet core catcher is made in form of ring with conical outer surface and cylindrical inner surface. Cylindrical shank is located above ring conical part. Core catcher has slot over its length at angle to its axis. Walls of slot are flat and parallel to each other. EFFECT: higher efficiency. 2 dwg

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RU 2 029 055 C1

Authors

Surkov D.V.

Ehdel'Man Ja.A.

Messer A.G.

Makushin V.V.

Nikolaev V.F.

Ravilov F.F.

Sianka-Ibarra L.

Dates

1995-02-20—Published

1991-06-28—Filed

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