First Semisubmersible Drilling Rig Built On U.S. East Coast Christened At Bethlehem Steel's Baltimore, Md. Shipyard
The Ocean Scout, the first semisubmersible oil well drilling rig to be constructed on the East Coast of the U.S., was christened on December 10, 1973, at Bethlehem Steel's Fort McHenry shipyard, '.Baltimore, Md. It was delivered to Ocean Drilling & Exploration Company of New Orleans, La. Sponsor of the rig was Mrs. William A. Hover, wife of the group vice president of the Pennzoil Company, which will operate the rig in the Gulf of Mexico.
Designed to be a mobile offshore drilling unit suitable for unrestricted ocean service, the Ocean Scout, with a lower hull length of 202 feet and width of 182 feet, carries a drilling derrick on its upper deck and was designed by Breit Engineering, Inc. of New Orleans.
The lower hull consists of two watertight structures 202 feet long, 32 feet wide and 28 feet deep, joined so that they are 150 feet apart on centers. Main members of the structure rising from the two sections of the lower hull are four 32-foot-diameter corner stability columns and four 10-foot-diameter interior columns all interconnected by truss work.
Atop them is the upper deck, which is 170 feet long, 150 feet in width, and 14 feet deep.
The upper deck is watertight and contains the machinery spaces. Overall, the rig will measure 108 feet from the bottom of the lower hull base line to the upper deck.
The operational draft will be 48 feet in depths of water from 80 feet to 600 feet. Towing will be done with wire towing hawsers.
Provisions are made for carrying drilling water, fuel oil, liquid mud, cement and other drilling supplies. The living quarters, including staterooms, galley, mess, lounge, hospital, offices and passageways, will be air-conditioned.
Accommodations are designed for a crew of 59.
The most modern fire-fighting equipment, as well as all necessary navigation aids are provided.
About 7,000 tons of steel were used in constructing the rig which, with its drilling derrick installed to full height, will tower 231 feet above the water when under tow. Since clearance under the Chesapeake Bay Bridge is only 186.5 feet, the upper portion of the derrick will be erected at an anchorage just below the Bay Bridge.
The Ocean Scout will be moored by eight 30,000-pound anchors, each with 2,500 feet of 2^-inch-diameter stud link anchor chain.
The unit is capable of drilling a hole in excess of 20,000 feet. Major items of drilling equipment include a 147-foot derrick, a 3,000- hp drawworks and two 1,300-hp mud pumps.
The main power plant for both drilling and vessel service includes diesel engines with over 5,100-hp combined capability.
The sub-sea system includes a 20-inch blowout preventer stack with a 24-inch integral marine riser and a 13^-inch 5,000-psi blowout preventer stack with a 16-inch integral marine riser. The marine riser is equipped with a hydraulic tensioning system. An underwater TV system is utilized to monitor and assist with sub-sea operations.
Two revolving cranes are situated aboard the drilling rig to provide loading and unloading capability.
Following the christening, Joseph D. Ingham, general manager of the Bethlehem's Baltimore ship repair and conversion yards, was the host at a luncheon in honor of the sponsor.
Other stories from January 15, 1974 issue
- Offshore Seminar To Be Held Feb. 4-8 In Houston, Texas page: 4
- Dearborn-Storm To Add New Jackup Rigs At Cost Of $29 Million page: 5
- The Presque Isle page: 7
- Bergesen Heads Firm Seeking To Purchase Boston Navy Yard page: 11
- Navy Energy R&D Office Relocated page: 12
- Moore And McCormack Co. Plan To Change Firm's Name page: 12
- Navy Amphibious Assault Landing Craft To Be Built By Todd Seattle Shipyard page: 14
- SNAME New England Section And AWS Hear Japanese Shipbuilding Report At Joint Meeting page: 14
- Midshipmen Hear Panel Of Four Discuss Offshore Drilling Careers For USMMA Graduates page: 19
- Pacific Lighting Marine Awards Contract For Two LNGs To Sun Shipbuilding With Option To Build Three More Ships page: 19
- Supertanker Brooklyn Sold By Seatrain To General Electric Credit page: 22
- Lykes Elects Four New Vice Presidents page: 24
- Kent E. Hoffmeister Named Engineering VP At Nashville Bridge page: 24
- South African Marine Elects Charles Parkhill page: 25
- Giant Gantry Crane Ordered From Krupp By Newport News Ship page: 25
- GATX Subsidiary Orders Second Coal Carrier From Bay Shipbuilding page: 26
- Year-End Report page: 27
- N.Y. SNAME, NYPE, IME And ASNE Joint Meeting Hears Paper On Silencing Marine Gas Turbines page: 27
- American Ship Receives Orders Totaling $31 Million For Towboats And Barges page: 30
- First Semisubmersible Drilling Rig Built On U.S. East Coast Christened At Bethlehem Steel's Baltimore, Md. Shipyard page: 31
- Second French Cargo Vessel Delivered At Sorel page: 34
- Colt Industries Names J.F. Morgan President Power Systems Div. page: 34
- J.J. Henry Company Moorestown/Norfolk Announces Promotions page: 34
- Sydney Swan Retires From American Bureau page: 35
- More Navy Ship Repair Work For Private Shipyards page: 37
- Sun Ship Builds Big, Fast Trailership In Record Time page: 37
- Stewart & Stevenson Open London Office; Knapp Named Manager page: 38
- Captain Robert E. Hart Named New President Marine Index Bureau page: 39
- Military Sealift Command Invites Offers To Operate Nine 25,000-Dwt Tankers page: 41
- Hydro Products Introduces New Right Angle Adaptor For Underwater TV Camera page: 41