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2 167 358

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C2

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IPC

(21) (22)

Application

98119354/06, 1998-10-23

(24)

Start date

1998-10-23

(22)

Actual filing date

1998-10-23

(45)

Published

2001-05-20

(72)

Inventor

Grachev V.V.Dobrenkov A.N.Rudnitskij A.V.Ippolitov V.V.

(73)

Holder

OaoObshchestvo S Ogranichennoj Otvetstvennost'Ju Institut Prirodnykh Gazov I Gazovykh Tekhnologij Vniigaz"

PIPE THICKENED THREADED JOINT Russian patent published in 2001 - IPC

Abstract RU 2167358 C2

FIELD: oil and gas industry. SUBSTANCE: invention relates to oil-field equipment. Pipe joint has pipes with external thread at their ends and drawn together by coupling, sealing ring. The latter is positioned in end grooves made on internal side of pipes. It is made concave inside pipe joint. Ends of grooves may be tapered, spherical as well as cylindrical. Concave surface of sealing ring is made hyperbolic or wave-shaped. EFFECT: enhanced sealing of pipe joint. 4 cl, 6 dwg

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RU 2 167 358 C2

Authors

Grachev V.V.

Dobrenkov A.N.

Rudnitskij A.V.

Ippolitov V.V.

Dates

2001-05-20—Published

1998-10-23—Filed

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