Page 8: of Maritime Reporter Magazine (October 1973)

Pentagone 82— (Continued from page 9) generator. Each has a continuous rating of l,500-hp/1050-kw, 480 volt at 60 cycles. GEGO-Baylor static rectifiers supply direct-cur- rent for the draw works (three 1,000-hp electric motors), the ro- tary (one 800-hp electric motor), two mud pumps (two 800-hp elec- tric motors each), and one auxil- iary mud pump (one 3'50-hp elec- tric motor). The emergency gen- erator is rated at 250 kw, 480 volt and 60 cycles.

The draw works is an EiMSCO model C-3 fitted with ELMAGGO 7838 auxiliary brake and a Crown "O" Matic protector. The rotary talble is an independently driven

EM3CO model T-3750. The der- rick is an EMiSCO 148 feet by 36 feet type with 1,150,000 pounds

API capacity. The heave compen- sator is a VETICO hydraulic-mo- tion compensator system having a 400,000 pound maximum string ca- pacity and a 15-foot stroke.

There are two 1,600-hp triplex mud pumps, supercharged. Each pump is driven by two d-c electric motors. The auxiliary mud pump is rated at 375 hp and is of the duplex type. There are six Mission centrifugal mixing pumps for su- percharging, transfer, degasser and desilter operations. There are five mud pits with a total capacity of 2,440 barrels.

For bulk mud and cement stor- age there are eight 1,645 cubic feet pressure tanks, each with weight indicator, three surge tanks equipped with weight indicators and BJ mud auto-mixer.

The cementing system consists of two Dowel 1 GR. 10,000 psi W.P. pumps and two centrifugal mixing pumps.

The blowout prevention system consists of one 20j4-inch single ram plus single bag-type pre- venters of 2,000 psi c.w.p., 22- inch integrated marine riser, one 13^-inch double rams (10,000 psi c.w.p.) plus single-lbag (5,000 psi c.w.p.) preventer, and a 16-inch integrated marine riser.

There are four 60,000 pounds, each, with a 40-foot stroke marine riser tensioners for 1^2-inch wire and four 14,000 pounds, each, with a 30-foot stroke guide line tension- ers for ^-inch wire.

There are two BOP hydraulic control systems, providing 100 per- cent redundancy, with one 240-gal- lon accumulator unit with electric and air pumps and mixing tank and one 10,000 psi test system.

The rig is equipped with a

Schlumberger electric logging unit.

An Aqua-Chem, Model S.300

SPE.E. sea-water distillation unit provides all fresh-water require- ments.

The living quarters accommo- date 74 people in fully air-condi- tioned spaces and is designed to take care of tropical and subarctic conditions.

The 6,461 square foot helicopter deck provides an unobstructed area for S.61 and Super Frelon helicop- ters. This landing pad is outfitted with nets, lights, a beacon and a 1,000-gallon releasable fuel tank.

The life-saving equipment con- sists of two 35-man life boats, six 6-man inflatable life rafts, ten 6- man rafts and four escape nets.

Marathon Manufacturing

Company

The Marathon Manufacturing

Company is primarily a manufac- turer of industrial metal products.

The product mix of the company is diversified. In addition to mobile offshore-drilling platforms, it in- cludes heavy off-highway equip- ment, service boats, towboats, chemical carriers, crane and deck barges, railroad tank and hopper cars, reinforcing bars, pre-engi- neered steel buildings and other products.

Marathon Manufacturing Com- pany is the evolution of a com- pany incorporated in 1959 under the Small Business Investment Act as Mid-Atlantic Small Business

Investment Company—the third largest in the United States. The following year, the firm's name was changed to Business Funds, Inc., still retaining its license as an

SBIC.

Prior to 1967, Business Funds' basic activities consisted of making investments in the equity capital and long-term debt securities to such concerns, and the financial ad- ministration of their investments, including consultancy and advisory services.

In July, 1967, Business Funds voluntarily withdrew its license to operate as a Small Business In- vestment 'Company, and a year later began a program of expansion and diversification. This program continues today.

In January, 1969, Business

Funds, Inc. deregistered under the

Investment Company Act of 1940 and became an operating company in the area of basic manufactur- ing. Also in 1969, the firm's name was changed to -that of today—

Marathon Manufacturing Com- pany.

Marathon expanded in the ma- rine field and obtained facilities and developed products in the en- suing years. The firm launched its first self-contained, self-elevating mobile offshore drilling platform in 1956. From this modest begin- ning, Marathon has become a world leader in the manufacture of these rigs with building facilities at

Vicksiburg, Miss.; Brownsville,

Texas, Scotland and Singapore. In addition, support facilities for this production are maintained at

Longview, Texas, and Vicksburg.

A key to Marathon's pre-eminence in the offshore drilling platform business was its development of the dependable electro-mechanical elevating system.

Marathon entered the semi- sub- mersible and drill-ship construction phases of offshore petroleum ex- ploration in 1971.

To better support the increased demand of the world's petroleum industry in its continuing search for natural energy reserves, Mara- thon built a $25 million total capa- bility shipyard at Brownsvillte,

Texas, and acquired a world-fa- mous shipyard at Clydebank, near

Glasgow.

In 1971, the $25 million expan- sion program was launched at

Marathon's Brownsville shipyard facility. The installation covers some 133 acres and includes a 2,500-foot frontage on the Browns- ville Ship Channel with more acre- age and frontage available for fu- ture expansion. Wiith a work force of approximately 2,200 people, this facility excels in engineering and fabrication to manufacture and launch semi-submersible drilling platforms, workboats, tugs, supply vessels, chemical carriers and oth- ('Continued on next page)

PRINCIPAL EQUIPMENT SUPPLIERS

MANUFACTURER SYSTEM

Baylor Company

Continental Emsco

General Motors, Electro-Motive Division

Vetco Offshore, Inc.

Koomey Division, Stewart & Stevenson

The Rucker Company

Hutchinson Hayes Int'l., Inc.

Hance Industries

Carrier Corp.

Comex, France

Mission Manufacturing Co., Division of TRW

The Schubert Co., Inc.

Brissoneau & Lotz, France

Dowell—supplied by Dowell Schlumberger, Inc.

Manitowoc Engineering Co.

Marathon LeTourneau Offshore

General Hotel Supply Co., Inc.

Construction Services, Inc.

Rig-A-Lite Division of Esquire

Metal Arts Division of Dixilyn

Inter Equipment Co.—supplied by Peden Iron & Steel

Thyrister System, Propulsion System, Situation Control System, and

Drilling Operations Control

Derrick, Rotary Table, Draw Works, and Mud Pumps

Main Diesel and Electric Generators

Undersea Systems

BOP Accumulator System

Tensioning System

Shale Shaker

Ventilation and Air-Conditioning Installation

Air-Conditioning and Refrigeration Systems

Diving Equipment

Auxiliary and Fire Pumps

Fire-Fighting and Foam System

Anchor Winches and Fairleaders

Dry-Mud Storage

Cranes

Cranes

Galley Equipment

Insulation

Derrick and Deck Lighting

Elevators

Water Purification Unit

ONE OF FIVE—Each of the columns has a diameter of 3) feet 4 inches and a pontoon at the foot measuring 70 feet in diameter and 23 feet in height. It is 1 34 feet from the base of the pontoons to the main deck. The draft when under tow is 24 feet and during drilling operations the draft is 72 feet. The horizontal bracing tubes have a diameter of 8)4 feet and a diagonal of IVA feet. The platform forms the upper tie. 10 Maritime Reporter/Engineering News