Page 6: of Maritime Reporter Magazine (June 1974)

The Zapata Ugland (Continued from page 7) feet; Sack material, 4,500 sacks;

Liquid mud, 1,700 barrels; Pipe rack, 7,600 square feet; Marine riser rack, 4,600 square feet, and

Potaible water, 700 barrels.

Major Drilling and Auxiliary

Equipment—

Derrick: Lee C. Moore—40-foot by 40-foot base, 160 feet high, 18- fooi by 18-foot water table, design- ed to accommodate motion compen- sator and automatic pipe racking.

Rated at 1,000,000 pounds static hook load capacity.

Power Package: Four EMD

Model 16E8 power units, each con- sisting of a Model 645, 16-cylinder engine driving Model A20-6, 600- volt 3-phase 60-Hz alternator. Each unit rated at 1,500 kw. DC power provided through SCR rectifier system. Total engine power, 8,000 hp.

Drawworks: Oilwell E2000 dou- ble drum, with Elmagco 7838 aux- iliary brake, with l-Hs-inch drill line.

Driven by two EMD 79MD DC electric motors, totaling 1,600 hp continuous, 2,000 hp intermittent.

Mud Pumps: Two Oilwell 1700

PT triplex single acting piston slush pumps, each with centrifugal charge pump and Hydril K20-5000 pulsation dampener. Each pump driven by two EMD 79MD DC electric motors totaling 1,600 hp continuous, 2,000 hp intermittent.

Subsea Equipment: 20^4-inch

BOP 2,000 psi working pressure with one Cameron double type U ram preventer and one Rucker-

Shaffer annular preventer with

Cameron 24-inch riser and Regan flow diverter. 13^-inch BOP 10,000 psi working pressure with two Cameron double type U ram preventers and two Rucker-Shaffer annual preventers with Cameron 16->inch riser. Cameron Payne sub- sea hydraulic control system.

Cranes: Two National OS-435

Hydraulic cranes with 120-foot booms, rated at 85 tons at 30-foot radius. Each driven by a Cater- pillar D-343 ATA engine.

Lubricants: Mobil Oil Corpora- tion supplied the lubricants for the equipment in the rig. "Storm Shield" Mooring Sys- tem—

Zapata's "Storm Shield" moor- ing system can withstand storm forces when waves approach from any compass direction with 100- knot-sustained winds, and associ- ated storm conditions act simul- taneously and from the same di- rection.

Chain: Unit is fitted out initially with ten 3,500-foot lengths of high strength ABS approved 3-inch welded stud chain, with capability for a total of ten 5,000-foot lengths of chain.

Anchors: Ten 40.000-pound Baldt

Moorfast anchors.

Windlasses: Four dual and two single wildcat units with maximum pull capacity of 550,000 pounds and stopper capacity of 1,000,000 pounds.

Controls: Control station at each corner of unit where windlasses are located. Tension indicators at windlasses and in barge control center. Chain stoppers equipped for both remote and manual quick release under maximum load.

Analyses: Mooring analyses have been performed to evaluate moor- ing forces and mooring system in water depth range from 150 feet to 1,000 feet using 3,500 feet to 5,000 feet of 3-inch chain and pro- pulsion augmented as needed.

Propulsion Chacteristics—Draft, 22 feet; Lower hull depth, 25 feet;

Lower hull freeboard, 3 feet; Dis- placement, 17,530 S.T.; Self-propul- sion system: Two 10-foot-diameter screw propellers with nozzles (one each hull), each driven by four 750- horsepower electric motors. Each hull fitted with rudders for high maneuverability and steering con- trol ; Speed-power data, based on sea trial results: Calm sea with no wind, 11.0 knots; Calm sea with 20-knot headwind, 9.0 knots; 15- foot seas with 20-knot headwind, 6.0 knots.

Quarters—

Capacity: 82-man capacity on two decks with dual galley-mess arrangement.

Control Center : Third deck con- trol center includes wheelhouse, radio room, chart room, and barge control center.

Helicopter deck: Meets Norwe- gian regulations for either Sikorsky

S-61 and S-70 models, or any other equivalent 25,000-pound unit.

WHEN YOUR REPUTATION IS ON THE LINE, PROTECT IT WITH

Heavy marine work is tough business.

You simply can't risk your reputation on second-best equipment—especially the rope you use.

That's why Jackson ropes are pre- ferred by veteran seamen. Jackson has a longtime record of performing depend- ably under the most rugged conditions.

They're designed to handle easier, resist abrasion and shock loads—and they have reserve strength to tackle the toughest job.

Choose from a complete line of nylon, polys, natural fibers and combinations to match any job. Sizes up to 15-inch cir- cumference . . . lengths to 1800 feet . . . strengths to 500,000 pounds.

Jackson's big on service, too. Marine distributors and specialists are ready to help you any time — from ready-to-go stocks to on-the-job assistance.

Before you buy your next towing, hawser or mooring line, check out Jackson —the extra-performance rope that pro- tects your reputation when it's on the line.

JACKSON % ROPE CORPORATION

Subsidiary of ASPRO, Inc.

Ninth and Oley Streets, Reading, Pa. 19604

Phone 215/376-6761

SALES/SERVICE CENTERS:

READING • CHICAGO • NEW ORLEANS • LOS ANGELES 8 Maritime Reporter/Engineerirtg News