Drilling method

Details Drilling method Drilling method

2007-08-07

2007-08-07

Tsay, Frank S. (Department: 3672)

Wells

Processes

Assembling well part

C166S081100, C175S218000

Reexamination Certificate

active

10442548

ABSTRACT:
Methods and apparati are disclosed for continuous circulation of drilling fluids while adding or removing tubulars to and from a drill string, and also for continuing drilling during the addition or removal of tubulars to and from the drill string.

REFERENCES:
patent: 2245960 (1941-06-01), Claire
patent: 3463231 (1969-08-01), Hutchinson
patent: 3486560 (1969-12-01), Hutchinson
patent: 3559739 (1971-02-01), Hutchinson
patent: 4315553 (1982-02-01), Stallings
patent: 6119772 (2000-09-01), Pruet

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