Drilling rig with independent table structure

Details Drilling rig with independent table structure Drilling rig with independent table structure

1975-07-07

1977-05-24

Purser, Ernest R.

Tool driving or impacting

Advance causing or controlling means

Tool advances relative to drive

52116, 52299, E21B 1500

Patent

active

040249247

ABSTRACT:
An improved portable drilling rig for drilling deep boreholes in the earth, in which the table or working floor of the rig, on which the rotary table and draw works are supported, is on a separate framework supported on and attached to a structural frame or base, for the drilling rig. The floor structure is broken down into a plurality of parts for ease in transportation, each of which have independent columns and cross-bracing. The central portion of the floor which supports the rotary table, and which must support the full weight of the drill pipe, has special heavy columns which are supported on a structural base in substantially the same position as the base connection of the mast, when in a raised position. Therefore, weight can be transferred from the rotary table to the crown block and vice versa, and the weight is still applied to the base frame in substantially the same position.

REFERENCES:
patent: 2403080 (1946-07-01), Hilborn
patent: 3333377 (1967-08-01), Woolslayer
patent: 3749183 (1973-07-01), Branham et al.
patent: 3796272 (1974-03-01), Branhan et al.
patent: 3803780 (1974-04-01), Donnally

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