Drilling and casing landing apparatus and method

Details Drilling and casing landing apparatus and method Drilling and casing landing apparatus and method

1977-11-04

1979-01-09

Pate, III, William

Boring or penetrating the earth

Processes

175 96, 175107, 175171, 175258, E21B 312, E21B 922

Patent

active

041333969

ABSTRACT:
Casing is run into a well bore hole on a running pipe string. Fluid motor and drill apparatus is supported in the casing, with the drill extending below the lower end of the casing to drill the bore hole in advance of the casing. For subsea drilling operations, the casing is suspended from a riser housing which lands on a subsea base, and the running pipe is released from the riser housing to enable retrieval of the motor and drill assembly. Plural motors are employed for drilling large holes.

REFERENCES:
patent: 1461713 (1923-07-01), Gilman et al.
patent: 2016068 (1935-10-01), Bannister
patent: 2588068 (1952-03-01), Williams et al.
patent: 2595126 (1952-04-01), Causey
patent: 3356167 (1967-12-01), Trent
patent: 3519071 (1976-07-01), Word, Jr.
patent: 3539023 (1970-11-01), Tedrow
patent: 3621910 (1971-11-01), Sanford
patent: 3661218 (1972-05-01), Brown
patent: 3732143 (1973-05-01), Joosse
patent: 3770067 (1973-11-01), Ikeda

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