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2 209 293

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Application

2002102034/03, 2002-01-21

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Start date

2002-01-21

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Actual filing date

2002-01-21

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Published

2003-07-27

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Inventor

Rekin S.A.Rezvanov M.A.Urazakov K.R.

(73)

Holder

Dochernee Obshchestvo S Ogranichennoj Otvetstvennost'Ju Nauchno-Issledovatel'Skij I Proektnyj Institut Nefti" Otkrytogo Aktsionernogo Obshchestva Neftjanaja Kompanija

COUPLING FOR DRILL AND TUBING PIPES Russian patent published in 2003 - IPC

Abstract RU 2209293 C1

FIELD: oil production, particularly, devices for joining of drill and tubing pipes. SUBSTANCE: coupling for drill and tubing pipes has body and ball members in channels made in form of external radial circular bores in body end parts. Ball members are installed for their projection beyond bore through at least 1/3 of their diameter. EFFECT: reduced coefficient of friction between pipes in well, increased service life and operate reliability of drill and tubing pipes and their joints. 1 dwg

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RU 2 209 293 C1

Authors

Rekin S.A.

Rezvanov M.A.

Urazakov K.R.

Dates

2003-07-27—Published

2002-01-21—Filed

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