Flush mounted self aligning spider

Details Flush mounted self aligning spider Flush mounted self aligning spider

1998-04-03

2000-07-18

Lillis, Eileen Dunn

Boring or penetrating the earth

Wedging slip assembly for supporting a pipe or rod

464163, 188 67, 166 7514, 166 7752, E21B 1906

Patent

active

060893389

ABSTRACT:
A spider for use within the rotary table opening has all movable elements flush with or below the rig floor. The conventional wedge shaped slips are supported and aligned by a slip carrier that has a spherical outer surface that slideably mates with a spherical bowl inner surface in the spider such that the pipe, slip, and slip carrier can tilt as a unit about any horizontal axis that passes through the spherical surface center.

REFERENCES:
patent: 2589159 (1952-02-01), Stone
patent: 5335756 (1994-08-01), Penisson
patent: 5848647 (1998-12-01), Webre et al.

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