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2 134 765

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C1

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IPC

(21) (22)

Application

98100874/03, 1998-01-05

(22)

Actual filing date

1998-01-05

(45)

Published

1999-08-20

(72)

Inventor

Dorodnov I.P.Shamanov S.A.Jakovenko A.A.

(73)

Holder

Dochernee Obshchestvo S Ogranichennoj Otvetstvennost'Ju Kompanija Rossijskogo Aktsionernogo Obshchestva

REAMER Russian patent published in 1999 - IPC

Abstract RU 2134765 C1

FIELD: bore-hole drilling technology. SUBSTANCE: this relates to drilling deep bore-holes and particularly reamer is used for increasing annular clearance between casing string and wall of bore-hole. Reamer has body with thread, rock-crushing member, washing passage. Rock-crushing member is of torus configuration according to diameter of drill bit with lower bevelled face, and slot. It is located on body with displacement of its axis. Teeth are arranged on rock-crushing member on diametrically opposite surfaces. In addition, body is provided with head-pieces which are made at angle to longitudinal passage of body. Washing passage is made along longitudinal axis of body. Aforesaid embodiment of reamer ensures highly efficient operation. EFFECT: higher efficiency. 4 dwg

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RU 2 134 765 C1

Authors

Dorodnov I.P.

Shamanov S.A.

Jakovenko A.A.

Dates

1999-08-20—Published

1998-01-05—Filed

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