Gas hydrates drilling procedure

Details Gas hydrates drilling procedure Gas hydrates drilling procedure

1981-07-06

1983-12-27

Novosad, Stephen J.

Boring or penetrating the earth

With heating or cooling drilling fluid

175 66, E21B 2100, E21B 2106

Patent

active

044225130

ABSTRACT:
When drilling through hydrate-containing strata, instead of increasing the density of the drilling mud to reduce or prevent melting of the hydrates, the density of the mud is maintained at a level sufficiently low to promote melting of the hydrates. The gas generated by the melting hydrates rises to the surface with the drilling mud which is diverted by a rotating diverter at the wellhead to a degasser where the gas is separated from the mud, and the mud is returned to the mud tanks for re-use. If the drill string is to be removed temporarily, the mud density is increased to stop hydrate melting.

REFERENCES:
patent: 3303895 (1967-02-01), Fontenot
patent: 3498393 (1970-03-01), West et al.
patent: 3618680 (1971-11-01), Ellard
patent: 3701388 (1972-10-01), Warren

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