Page 10: of Maritime Reporter Magazine (July 1981)

SUPER 300

MAIN DECK VIEW i nC0MPANI0NWAY (TYPICAL)

MARATHON LeTOURNEAU

COMPANY CRANE (TYP)

DRAWWORKS \

OFFICE-"

ROTARY- •

SET BACK -fc -J , W-1500 WINCH (TYPICAL) ANCH0R RACK

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QUARTERS ... m.

DRILL FLOOR IN V-OOOR SHALE SHAKER

DRILLING POSITION RAMP HOUSE

HELIPORT ' " '173 -0" ACROSS FLATSP

Marathon Introduces New Super 300 Jackup

For Harsh Environments

Marathon's new Super 300 self- elevating offshore drilling plat- form, introduced during the 1981

Offshore Technology Conference, is designed to meet an offshore industry need for a jackup com- patible with harsh environments too severe for standard 300-foot water depth rigs, but not hostile enough to require a "Gorilla" rig.

YOIITS

IPAQK A^IIIOR

Vortex Spark Arrestors, in use for more than 40 years, are cus- tom-designed for specific engine/vessel installations. Although suitable for all size diesel engines, they become most economical in the 5000 bhp range and higher. Vortex was selected for Sun

Ship Hulls 676 and 677 powered with 14,400 bhp Sulzer diesels.

The Vortex/Uniflo design offers: 1. POSITIVE VORTICAL ACTION: all sparks extracted. 2. DUST CHANNEL: sparks immediately extracted from hot gas chamber. 3. ABSOLUTELY DRY: no corrosive action. 4. MAINTENANCE FREE: no moving parts. 5. MINIMUM DRAFT LOSS: straight through design. 6. CANNOT CLOG: large, accessible passages. 7. SELF CLEANING: solids provide scouring action.

F.I L

Send for descriptive literature on our full line of spark arrestors, muf- flers, and dust catchers for coal and oiJ-burning vessels.

MAPECO PRODUCTS, INC. 20 VESEY ST. • NEW YORK. N Y. 10007 212/732-7863 • TELEX 12-6075 -DERRICK IN —DERRICK IN -CANTILEVER ( SLOT DRILLING

DRILLING POSITION

POSITION

SUBSTRUCTURE SUBBASE

SUPER 300

SIDE ELEVATION

MARATHON LeTOURNEAU

CRANE (TYPICAL)

HELIPORT (73'-0" ACROSS FLATS)

CONTROL HOUSE ^ : AUXGEN Si HOUSE- g OUARTERSggig.

WiTYPirT|CH / CR™UFE (IYHLAL) I B0ST COMPANIONWAY

Like Marathon's Gorilla, the Su- per 300 will have both cantilever and slot drilling capabilities.

The Super 300 is engineered to survive 60-foot waves and 100- knot winds in 300 feet of water.

Its ample variable load capacity makes this jackup suitable for work in areas where frequent re- supply of consumables is imprac- ticable.

With its slot and cantilever drilling configurations, Mara- thon's newest jackup is capable of operating on those frontiers of offshore drilling where fre- quent storms or other climatic conditions presently hinder re- supply and prohibit exploration or development activities. The

Super 300 drilling pattern allows full design storm rating for ex- ploratory wells drilled through the slot. Conventional cantilever drilling can be carried out in less- er weather conditions. In the can- tilevered position, the derrick can be extended 45 feet past the stern and 12 feet on either side of the centerline. This results in a total drilling pattern of 70 by 24 feet.

The Super 300 incorporates field-proven features such as the rack and pinion elevating system used for more than 20 years on all Marathon jackups. This sys- tem uses four, six-high gear units for each square leg to provide a constant jacking speed of 90 feet per hour. The constantly engaged pinion gears of this system pro- vide an additive upward and downward fail-safe drive force as the rig is raised or lowered.

Overall length of the Super 300 is 270 feet, while the overall width is 250 feet. With a hull depth of 28 feet, the unit is big- ger and heavier than Marathon's

Class 116 jackup and can carry more variable and fixed load—up to a total of 10,500,000 pounds.

In an optional version of the

Super 300, the 443-foot-long legs can be lengthened to 510 feet to allow drilling in 350-foot waters.

Maximum storm conditions for this special configuration are 55- foot waves and 100-knot winds.

Marathon Manufacturing Com- pany is the leading manufacturer of mobile offshore jackup drilling rigs, and is a multiproduct com- pany manufacturing materials- handling equipment, fabricated metal products, steel buildings, white oils, batteries, and con- sumer goods, and provides civil engineering and construction services. Marathon Manufactur- ing is a wholly owned subsidiary of The Penn Central Corporation.

For more information and free literature on the Super 300 jackup,

Write 20 on Reader Service Card

Paper On Real Time Monitoring

Presented At Pacific Northwest SNAME

At the spring meeting in Vic- the Pacific Northwest Section of toria, British Columbia, Canada, The Society of Naval Architects

At spring meeting of SNAME Pacific Northwest Section (L to R): Ronald B. Thicke; coauthors Robert E. Nichol and Bruce Hutchison; Les Coward, Section chairman; and author Karl Strauss. 12 Write 198 on Reader Service Card Maritime Reporter/Engineering News