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Con's of Inverted Oil Emulsion

Mud—Statfjord 'A' Platform."

Paper 261 — "High Density

Clear Fluids for Completions and

Workovers."

Paper 262 — "New Computer- ized Solids Control Program Re- duces Drilling Costs in North

Sea."

Paper 263—"Successful Stimu- lation Practices — Offshore Hol- land."

Session No. 24 — Floating and

Compliant Structures.

Paper 264 — "The Hutton Ten- sion Leg Platform."

Paper 265 — "Dynamic Behav- ior of Models of Tethered Buoy- ant Platforms."

Paper 266—"The Development of Articulated Buoyant Column

Systems as an Aid to Economic

Offshore Production."

Paper 267 — "Test-CONAT, A

Large Scale Test in the Vicinity of the Research Platform 'Nord- see'."

Paper 268—"Floating Concrete

Platform for Deep Water Oil Pro- duction and Storage." $2.5-Million Facilities

Expansion Under Way

At Wiley Manufacturing

JESCO, Inc., a Unit of AMCA

International Corporation located in Fulton, Miss., has received a contract for approximately $2.5 million for the design and con- struction of manufacturing facil- ities at Wiley Manufacturing in

Port Deposit, Md.

The facilities are part of an expansion project at Wiley, also a Unit of AMCA International, in conjunction with the $129-mil- lion contract that was awarded to

Wiley this spring for the fabrica- tion of tunnel tubes for the new

Fort McHenry 1-95 twin vehicular tunnels to go under the harbor at

Baltimore.

Varco-Pruden, a third Unit of

AMCA International based in

Memphis, Tenn., will furnish met- al buildings for the expansion project, which is currently in progress and scheduled for com- pletion early in 1981.

Tracor And MBAssociates

Executives Announce

Completion Of Merger

Frank W. McBee Jr., president of Tracor, Inc., Austin, Texas, and

Robert Mainhardt, president of

MBAssociates, San Ramon, Calif., have jointly announced the com- pletion of the merger of MBAsso- ciates (MBA) into a wholly owned subsidiary of Tracor.

Terms of the merger, approved by the directors of both compa- nies and the shareholders of MBA, call for Tracor to issue .3125 of one share of Tracor common stock for each of MBA's approxi- mate 1.2 million shares outstand- ing. (MBA shareholders will re- ceive written instructions regard- ing the conversion of MBA shares to Tracor shares as soon as is practicable.)

MBA, based in San Ramon, will continue the development and manufacture of its countermeas- ures, ordnance, and automated systems product lines as part of

Tracor's Aerospace operations, which are headquartered in Aus- tin under the direction of group vice president Hardy M. Caton.

The products of MBA complement

Tracor's current defense systems business and broaden the compa- ny's technological competence in this market, according to Mr.

McBee.

Tracor, Inc. is an international technological products and serv- ices company headquartered in

Austin. The company is a major technical contractor in sonar and health programs, a leading manu- facturer of scientific instruments and advanced electronic systems, and a major high-volume produc- er of electronic and electrome- chanical components.

SCHOTTEL-Rudderpropellers for Main Propulsion of Offshore Giant

The mammoth crane and work-ship "ODIN" is regarded as the most powerful and modern offshore work-ship in the world. (Length = 178.15 m, Beam = 42.79 m, Depth = 16.48m, Draught max. 12m.) built by NDSM, Amsterdam, for Heerema, The Hague, this vessel was designed specifi- cally for operation in the northern part of the North Sea.

Converted from the hull of the 53,000 tdw tanker „ARAM A-

NAC", the "ODIN" ensures maximum stability and has cross-flooding for the crane operation. This was achieved by removing the former engine room and adding wing sta- bilizing tanks to extend the width of the vessel. The slewing crane constructed by the American Hoist and Derrick Co. is the largest ever supplied for a crane ship. Its lifing capaci- ty over the stern is 3,000 tons at 32 m outreach and as a sle- wing crane 2,700 tons at 44 m outreach. While erecting the offshore platform "Claymore" in the Thistle-Field, the "ODIN" set a new world record by lifting a 2,407 tons struc- ture at 44 m outreach.

To cope with the sometimes severe weather conditions in unprotected areas such as the North Atlantic, the "ODIN" was fitted out with a main propulsion and manoeuvring sys- tem consisting of three electrically driven steerable retrac- table SCHOTTEL-Rudderpropellers, type S1500 LSV, each having a capacity of 1,470 kW (2,000 hp). These units, con- tainerized in 10 m steel cylinders 4 m in diameter, were deli- vered ready for installation by SCHOTTEL- NEDERLAND

B.V., The Hague.

At the shipyard they simply had to be installed in the three wells intended for them (two at the stern and one forward) and subsequently connected to the power lines from the control-centre. Each of the cantainerized units includes a direct-current propulsion motor and its water cooling sys- tem, the lubricating system for the rudderpropeller, an electro-magnetic brake, a gravity drainage system con- trolled by a level switch, as well as all the necessary control and alarm systems. For optimum hydro-dynamic efficien- cy the 5-bladed propellers are monted in nozzles. The stee- ring of the three SCHOTTEL units is centrally controlled.

The steerable thrust of the SCHOTTEL-Rudderpropeller, which turns through a full 360°, enables the giant offshore work-ship to attain maximum manoeuvrability, allowing for exact positioning eben under extremely difficult condi- tions.

Up to the present over 15,000 SCHOTTEL units with more than 4 million hp propulsion capacity have been delivered for ships of all types all over the world.

SCHOTTEL International:

The SCHOTTEL-Group, with its headquarters at Spay on the Rhine offers world-wide sales and service through

SCHOTTEL-companies located at The Hague, London, Pa- ris, Vienna, Hamburg, Basle, Miami, Buenos Aires, Rio de

Janeiro, Singapore, Sydney and representatives throug- hout the world.

SCHOTTEL-WERFT, D-5401 Spay/F.R.G., Tel. 0 26 28/611

SCHOTTEL OF AMERICA, INC., 8375 N.W. 56 Street,

Miami/Florida 33166, Tel. (305) 592-7350

October 1, 1980 ZIDELL 21