Method and apparatus for preventing debris build-up in underwate

Details Method and apparatus for preventing debris build-up in underwate Method and apparatus for preventing debris build-up in underwate

1976-10-12

1977-11-29

Purser, Ernest R.

Boring or penetrating the earth

Boring a submerged formation

Boring from floating support with submerged independent...

166 5, 175312, E21B 1502

Patent

active

040601404

ABSTRACT:
An improved method and apparatus for preventing buildup of cuttings or debris in underwater oil wells. The apparatus includes a drilling tool in the form of a primary tubular member having an internal diameter a predetermined amount greater than the external diameter of a drill string which is run downwardly through a conventional riser pipe string and underwater wellhead assembly. The drilling tool preferably includes an external shoulder formed on the lower end portion thereof for engagement with a corresponding internal shoulder at the juncture of the riser pipe string and the wellhead assembly for supporting the tool independently of the drill string. An annular resilient seal can be included on the lower end portion of the tool for providing a fluid-tight seal between the lower end portion of the tool and the juncture of the riser pipe string and the wellhead assembly. The tool can include a second tubular member connected at its lower end to the lower end of the primary tubular member. An annular space, open at its upper end, can thus be provided between the two tubular members of the tool for trapping cuttings and debris which may settle out from circulating or non-circulating mud in the annulus between the drill string and the riser pipe string above the tool. The tool is adapted to be retrieved with the drill string upwardly through the riser pipe string to the water surface where any cuttings and debris trapped therein can be disposed of without falling back to the bottom of the borehole.

REFERENCES:
patent: 2670930 (1954-03-01), Farrar
patent: 3012610 (1961-12-01), Bauer et al.
patent: 3102600 (1963-09-01), Jackson
patent: 3137348 (1964-06-01), Ahlstone et al.
patent: 3142344 (1964-07-01), Otteman et al.
patent: 3163220 (1964-12-01), Haeber et al.
patent: 3247914 (1966-04-01), Slack
patent: 3459270 (1969-08-01), Schuh
patent: 3465817 (1969-09-01), Vincent
patent: 3486555 (1969-12-01), Vincent

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