EXTERNAL TUBING GRAB Russian patent published in 1997 - IPC

Abstract RU 2086751 C1

FIELD: oil and gas production industry. SUBSTANCE: this is used in routine and overhaul repair of wells. External tubing grab has body with openings in which seated are wings of spring-loaded collet, and collet rotation mechanism. This mechanism is made in the form of bush which is rigidly connected with collet and wings and located in body between collet and spring. Made in outer surface of bush are slots with bevelled protrusions. Seated in them is screw rigidly connected with body. Pitch of rotation mechanism is equal to half angle between openings. EFFECT: high efficiency. 5 dwg

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RU 2 086 751 C1

Authors

Vagapov Ju.G.

Vagapov S.Ju.

Ishbaev G.G.

Akchurin Kh.I.

Dates

1997-08-10—Published

1995-04-19—Filed