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2 121 079

(13)

(51)

IPC

(21) (22)

Application

96117925/06, 1996-09-09

(22)

Actual filing date

1996-09-09

(45)

Published

1998-10-27

(72)

Inventor

Liftman I.B.Shvejkovskij Ju.I.Kolotygin V.N.Fozekosh D.I.

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Nauchno-Issledovatel'Skij Tekhnologicheskij Institut"

PLUNGER Russian patent published in 1998 - IPC

Abstract RU 2121079 C1

FIELD: well sucker-rod pumps used in oil production industry. SUBSTANCE: proposed plunger includes mud removers with equalizing holes. Mud removers are manufactured in the form of split rings made from high-strength material. EFFECT: enhanced operational reliability of plunger and sucker-rod pump as whole. 1 dwg

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RU 2 121 079 C1

Authors

Liftman I.B.

Shvejkovskij Ju.I.

Kolotygin V.N.

Fozekosh D.I.

Dates

1998-10-27—Published

1996-09-09—Filed