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2 135 876

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IPC

(21) (22)

Application

98104356/06, 1998-03-06

(24)

Start date

1998-03-06

(22)

Actual filing date

1998-03-06

(45)

Published

1999-08-27

(72)

Inventor

Degaj A.S.Grigor'Ev A.G.Davydov V.Ja.Gubin Ju.G.Katjushkin V.G.Makurin L.V.Prokhorov N.N.Shatilo S.P.Galichenko E.N.Medvedev A.P.

(73)

Holder

Oao Trubnyj Zavod"Predprijatie

THREADED JOINT FOR PIPE LINES Russian patent published in 1999 - IPC

Abstract RU 2135876 C1

FIELD: special-purpose highly-hermetic treaded joints with sleeves in gas and oil lines. SUBSTANCE: threaded joint has taper with trapezoidal profile at ends of pipes and sleeve whose central portion of inner surface is made in form of thrust shoulder with end surfaces corresponding to end surfaces of ends of pipes. End surfaces of pipe ends and thrust shoulder are made at angle relative to longitudinal axis. Sleeve has cylindrical surfaces whose diameter is lesser than outer diameter of pipe on side of outer ends of sleeve. Pipes are provided with mating cylindrical surfaces of respective length and diameter. Besides that, holes for wrench are provided in center portion of outer surface of sleeve. EFFECT: enhanced reliability of joint. 2 cl, 1 dwg

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RU 2 135 876 C1

Authors

Degaj A.S.

Grigor'Ev A.G.

Davydov V.Ja.

Gubin Ju.G.

Katjushkin V.G.

Makurin L.V.

Prokhorov N.N.

Shatilo S.P.

Galichenko E.N.

Medvedev A.P.

Dates

1999-08-27—Published

1998-03-06—Filed