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2 029 061

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Application

4951785/03, 1991-06-28

(22)

Actual filing date

1991-06-28

(45)

Published

1995-02-20

(72)

Inventor

Ehdel'Man Ja.A.Nikitin S.V.Ravilov F.F.Rajkhert L.A.Nikolaev V.F.Makushin V.V.Messer A.G.Sianka-Ibarra L.Surkov D.V.Solov'Eva N.A.

(73)

Holder

Nauchno-Issledovatel'Skij Institut Burovoj Tekhniki

MULTISTAGE TOGGLE-TYPE CORE CATCHER Russian patent published in 1995 - IPC

Abstract RU 2029061 C1

FIELD: drilling equipment. SUBSTANCE: holder 1 of core catcher accommodates levers 3 with turning shafts 4 located in holder recesses 6 and 5. Toggles 3 are set to horizontal position by springs and located at different heights. Lower recesses 5 located on one half of circumference of holder are below recesses 6 found on the other half of holder circumference. As a result cutting edges of toggles whose shafts are located in upper recesses 6 adjoin core above the cutting edges of toggles whose shafts are located in lower recesses 5. EFFECT: simplified design and reduced labor input in manufacture. 3 dwg

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RU 2 029 061 C1

Authors

Ehdel'Man Ja.A.

Nikitin S.V.

Ravilov F.F.

Rajkhert L.A.

Nikolaev V.F.

Makushin V.V.

Messer A.G.

Sianka-Ibarra L.

Surkov D.V.

Solov'Eva N.A.

Dates

1995-02-20—Published

1991-06-28—Filed

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