Off-shore drilling

Details Off-shore drilling Off-shore drilling

1987-01-02

1988-08-09

Novosad, Stephen J.

Boring or penetrating the earth

Boring a submerged formation

175 8, 414 22, E21B 1920

Patent

active

047621850

ABSTRACT:
A semi-submersible drill rig structure includes a ring-like enclosure surrounding a central drilling axis. In the structure are magazines holding drill string elements vertically. Lifting means on the structure raise the vertical drill string elements from their magazines and carry them to the drilling axis. A guide ring is displaceable to and from the drilling axis, in synchronism with the lifting means, to restrain the lower end of each raised element against pendulation. The magazines are rotatable about vertical axes to bring the individual elements under the line of movement of the lifting means and guide ring. Well casing elements are similarly restrained by the guide ring as they also are carried in a vertical orientation to the drilling axis. The disposition of the magazines in a structure surrounding the drilling axis provides a relatively calm region through which the drilling operations can be conducted.

REFERENCES:
patent: 3650339 (1972-03-01), Selfe et al.
patent: 3699688 (1972-10-01), Estes
patent: 3961673 (1976-06-01), Wolters et al.
patent: 4044895 (1977-08-01), Adair
patent: 4251176 (1981-02-01), Sizei et al.
patent: 4502551 (1985-03-01), Rule et al.

Affiliated with

Also associated with

Rating

Off-shore drilling does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Off-shore drilling, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Off-shore drilling will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-913271