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2 172 385

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(51)

IPC

(21) (22)

Application

2000107135/03, 2000-03-21

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Start date

2000-03-21

(22)

Actual filing date

2000-03-21

(45)

Published

2001-08-20

(72)

Inventor

Takhautdinov Sh.F.Studenskij M.N.Jusupov I.G.Abdrakhmanov G.S.Zajnullin A.G.Khamit'Janov N.Kh.Kashapov I.K.Zagidullin R.G.

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Tatarskij Nauchno-Issledovatel'Skij I Proektnyj Institut Nefti

DRILLING REAMER Russian patent published in 2001 - IPC

Abstract RU 2172385 C1

FIELD: drilling equipment, particularly, devices for expansion of well diameter in preset interval. SUBSTANCE: drilling reamer has hollow body accommodating spring-loaded rod connected with piston. Piston is connected by means of tie- rods with supports in which trunnions with roller cutters are attached to legs installed in body inclined recesses. Roller cutters have teeth located at different intervals. Piston tie-rods are double-linked and hinged to leg supports. EFFECT: higher serviceability of reamer and quality of well bore milling. 3 cl, 4 dwg, 1 tbl

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RU 2 172 385 C1

Authors

Takhautdinov Sh.F.

Studenskij M.N.

Jusupov I.G.

Abdrakhmanov G.S.

Zajnullin A.G.

Khamit'Janov N.Kh.

Kashapov I.K.

Zagidullin R.G.

Dates

2001-08-20—Published

2000-03-21—Filed