Safety system for underwater cutting

Details Safety system for underwater cutting Safety system for underwater cutting

2005-08-09

2005-08-09

Dang, Hoang (Department: 3672)

Wells

Submerged well

Means removably connected to permanent well structure

C166S055000, C166S298000

Reexamination Certificate

active

06926085

ABSTRACT:
Apparatus for a method of cutting pipes underwater comprising jetting a jacket down over the pipe, blowing mud out from between the pipe and the jacket so the annulus between the pipe and the jacket is substantially filled with water and/or air, and performing the cutting operation from within the pipe, wherein the jacket has the features mentioned herein.

REFERENCES:
patent: 3848667 (1974-11-01), Clark, Jr.
patent: 3938600 (1976-02-01), Essmeier
patent: 4144936 (1979-03-01), Evans
patent: 4619556 (1986-10-01), Parra
patent: 4799829 (1989-01-01), Kenny
patent: 4919210 (1990-04-01), Schaefer, Jr.
patent: 5238069 (1993-08-01), Schaefer, Jr. et al.
patent: 5259458 (1993-11-01), Schaefer, Jr. et al.

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