SPIDER Russian patent published in 1995 - IPC

Abstract RU 2030542 C1

FIELD: well drilling and repair. SUBSTANCE: spider has body with central end hole and radial recess with flap. Scissors are installed above horizontal axle, one ends of them are tied by spring and the other ends have wedges. Axle of scissors is rigidly connected with horizontal axle. On scissors between axle and wedges are rigidly installed bosses. Hydraulic cylinder with rod is located under bosses. Pusher is installed on rod end. EFFECT: higher reliability of spider with simultaneous simplification of design. 2 dwg

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RU 2 030 542 C1

Authors

Ali-Zade V.A.

Ismail-Zade O.M.

Dates

1995-03-10—Published

1990-12-25—Filed