Offshore marine structure with corrosion protection
This patent describes a marine structure having a deck and a rotatable drill string for drilling wellbores into the floor of a body of water; a jacket comprised of corrodible metallic members including support legs which are mutually interconnected with cross braces, and which jacket rests on the floor and supports the deck above the water's surface, a drilling template incorporated into the jacket to accommodate drilling conductors for guiding the rotatable drill string which is lowered from the deck to form a vertical wellbore, the drilling template including vertically aligned elongated conductor guides arranged in a horizontal pattern to define a drill conductor array comprised of external conductors, which encompass at least one internal conductor, a cathodic protection system protecting the corrodible metallic members of the marine structure comprising a first sacrificial anode system disposed on discrete submerged jacket members to afford corrosion protection to the jacket members as well as to submerged sections of the drill conductor array, and other sacrificial anodes removably carried on at least one internal conductor to supplement the cathodic protection afforded by the first sacrificial anodes.
- Assignee:
- Texaco, Inc., White Plains, NY
- Patent Number(s):
- US 4629366
- OSTI ID:
- 6929748
- Resource Relation:
- Patent File Date: Filed date 22 Oct 1984
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
03 NATURAL GAS
42 ENGINEERING
OFFSHORE PLATFORMS
CATHODIC PROTECTION
DESIGN
ALIGNMENT
ANODES
DRILL PIPES
ELONGATION
FASTENERS
JACKETS
METALS
MOORINGS
NATURAL GAS WELLS
OIL WELLS
ROTATION
SEA BED
SUPPORTS
CORROSION PROTECTION
DRILLING EQUIPMENT
ELECTRODES
ELEMENTS
EQUIPMENT
MECHANICAL STRUCTURES
MOTION
PIPES
WELLS
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing
420206 - Engineering- Mining & Drilling Equipment & Facilities- (1980-1989)
423000 - Engineering- Marine Engineering- (1980-)