Device for guiding a drilling string during underwater drilling

Details Device for guiding a drilling string during underwater drilling Device for guiding a drilling string during underwater drilling

1975-06-25

1977-10-11

Purser, Ernest R.

Boring or penetrating the earth

Boring a submerged formation

175 7, E21B 712

Patent

active

040530221

ABSTRACT:
Device for guiding a drilling string from a floating drilling rig comprises a flexible guide tube having an inner diameter which is constant and an outer diameter which decreases progressively from its median zone toward each end, the median zone being connected by swivel means to lateral and longitudinal members connected to the floating drilling rig.
This device is especially adapted for floating drilling rigs having a well through which the string descends.

REFERENCES:
patent: 3142343 (1964-07-01), Otteman et al.
patent: 3163239 (1964-12-01), De Vries et al.
patent: 3503460 (1970-03-01), Gadbois
patent: 3516488 (1970-06-01), Joubert et al.
patent: 3528497 (1970-09-01), Lehman
patent: 3618679 (1971-11-01), Crooke

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