Drilling rig equipped with pairs of block and tackle systems

Details Drilling rig equipped with pairs of block and tackle systems Drilling rig equipped with pairs of block and tackle systems

1981-10-26

1984-01-03

Spar, Robert J.

Material or article handling

Well pipe or rod racking mechanism

With slope change

414745, 175 85, 166178, 254285, 254336, 254415, E21B 1900

Patent

active

044239947

ABSTRACT:
This invention relates to drilling rigs, and more particularly to novel apparatus for supporting a plurality of pairs of block and tackle systems with the tackle systems of each pair operable sequentially and alternately, the one being used to support a main drilling or tubing string while the other is being used to rack stands of tubing therefrom.

REFERENCES:
patent: 2226947 (1940-12-01), Sheldon
patent: 2643005 (1953-06-01), De Jarnett
patent: 3658298 (1972-04-01), Moore et al.
patent: 4208158 (1980-06-01), Davies et al.

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