Method of deep drilling

Details Method of deep drilling Method of deep drilling

1981-02-12

1984-11-20

Leppink, James A.

Wells

Processes

Placing fluid into the formation

166 55, 166207, 175 72, 175171, E21B 720, E21B 2304

Patent

active

044833997

ABSTRACT:
Deep drilling is facilitated by the following steps practiced separately or in any combination:
(1) Periodically and sequentially fracturing zones adjacent the bottom of the bore hole with a thixotropic fastsetting fluid that is accepted into the fracture to overstress the zone, such fracturing and injection being periodic as a function of the progression of the drill.
(2) Casing the bore hole with ductile, pre-annealed casing sections, each of which is run down through the previously set casing and swaged in situ to a diameter large enough to allow the next section to run down through it.
(3) Drilling the bore hole using a drill string of a low density alloy and a high density drilling mud so that the drill string is partially floated.

REFERENCES:
patent: 1233888 (1917-07-01), Leonard
patent: 1880218 (1932-10-01), Simmons
patent: 2214226 (1940-09-01), English
patent: 2447629 (1948-08-01), Beissinger et al.
patent: 2583316 (1952-01-01), Bannister
patent: 3188850 (1965-06-01), Lintricum et al.
patent: 3228469 (1966-04-01), Kern et al.
patent: 3409093 (1968-11-01), Cunningham et al.
patent: 3616855 (1971-11-01), Colgate
patent: 3973628 (1976-08-01), Colgate

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