Boring or penetrating the earth – Processes
Patent
1995-04-19
1999-08-10
Dang, Hoang C.
Boring or penetrating the earth
Processes
175 40, 175340, E21B 700, E21B 4500
Patent
active
059343893
ABSTRACT:
An apparatus and a method for adjusting the total flow area of a drilling bit concurrently with drilling which includes a bit having a plurality of nozzles, each nozzle having a flow area and the bit having a total flow area, with at least one nozzle which is initially open and having a first flow area and at least one other nozzle which is initially closed and having a second flow area including a closure means for maintaining the nozzle in an initially closed state below a pre-selected differential pressure across the bit.
REFERENCES:
patent: 2950090 (1960-08-01), Swart
patent: 2987130 (1961-06-01), McIntyre
patent: 3087558 (1963-04-01), Dougherty, Jr.
patent: 3189107 (1965-06-01), Galle
patent: 3213949 (1965-10-01), Kistler, Jr.
patent: 3261413 (1966-07-01), Kistler, Jr.
patent: 3645331 (1972-02-01), Maurer et al.
patent: 3645346 (1972-02-01), Miller et al.
patent: 4114705 (1978-09-01), Milan
patent: 4372402 (1983-02-01), Trevino, Jr.
patent: 4942930 (1990-07-01), Millsapps, Jr.
patent: 5020724 (1991-06-01), Kiyono et al.
J.A. Short, Drilling and Casing Operations, Tulsa, Oklahoma, PennWell Publishing Company, pp. 241-248, TN871.25537.
Morris, Jr. William C.
Ramsey Mark S.
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