Page 59: of Maritime Reporter Magazine (April 1998)

INTERNATIONAL OFFSHORE TECHNOLOGY

Drilling Deeper While Maintaining Costs

While drilling and well con- struction operations represent a substantial proportion of offshore field development costs, especially in deepwater areas like the

Atlantic Margin, a new joint indus- try project is investigating a sys- tem to help control costs.

Coiled tubing (CT) technology is increasingly seen as a cost-effec- tive means of putting a drill bit in the reservoir, and its capabilities are developing rapidly, particular- ly on sidetrack and deepening operations.

The U.K's Center for Marine and Petroleum Technology has developed a Joint Industry Project which proposes the development of the concept of Drilling

Independent of Depth (DIODe), the basis of which is to adapt coiled tubing technology for seabed well construction and intervention operations. The DIODe project is a concept for an entirely new method of drilling and well servicing oper- ations, and has evolved to save costs as well as initiate new think- ing about the entire process of how offshore drilling operations are undertaken.

DIODe is perceived as a mobile unit capable of being easily moved from one seabed location to anoth- er, with minimal surface facilities and perhaps, ultimately no surface facilities at all. Using remote con- trol technology that is already understood (for example, the man- ufacturers of ROVs) the system will be controlled via an umbilical to a surface support vessel. The same umbilical will be used to sup- ply DIODe with power, drilling flu- ids and other consumables, possi- bly using the closed loop drilling fluid systems developed for under- balanced drilling.

For further information on opportunities regarding the pro- ject, contact Jane Kennedy of the

CMPT at tel: +44 1224 853400; fax: +44 1224 706601; e-mail: [email protected]

ABS SafeHull Developed

For FPSOs

As the Floating Production

Storage and Offloading units market continues to grow, so too do the business opportunities for related product and service sup- pliers. The American Bureau of

Shipping has responded to the challenge by developing its advanced SafeHull, dynamic- based design evaluation system for application to FPSOs.

Engineers at ABS have extended the SafeHull system so that it can be used to evaluate ship- shaped FPSOs with bow or stern turrets, and for those stationed with spread moorings. It is also available for the assessment of purpose-built designs and FPSO conversions.

Circle 61 on Reader Service Card

April, 1998 61

HEAVY-DUTY SIGNALS by^en^f

Model S-120 Piston Horn

Chosen for use on aircraft carriers as well as commercial vessels over 200 meters in length, the S-120 utilizes an oscillating piston driven by 7-1/2 horse- power 3 phase 220/440 volt electric motor producing 143 dB and a funda- mental frequency of S4 Hz in 1/3 octave band at one meter.

Kahlenberg Signals were developed to withstand the pun- ishing use of commercial and military service. Their dura- bility has been demonstrated over decades of service on ocean-going vessels ranging from naval warships to com- mercial vessels. Military specifications have required extensive testing for many of these whistles and the accessories supplied with them, which have proven the exceptional qualities of Kahlenberg design and manufac- turing.

OTHER QUALITY KAHLENBERG

PRODUCTS AND SERVICES INCLUDE:

FAIRWATERS, PROPELLER REBUILDING, PRO-

PELLERS UP TO 120-DIA, SHAFTS, COUPLINGS,

BEARINGS, STUFFING BOXES, AIR COMPRESSORS,

SOLENOID VALVES, USCG- ASME AIR RECEIVERS,

FOG SIGNAL TIMERS, WHISTLE LIGHTS, AUTOMATIC

AND AT WILL CONTROLS,

KAHLENBERG BROTHERS COMPANY

P.O. Box 358, 1966 MONROE ST.

TWO RIVERS, Wise. 54241

PHONE: (920) 793-4507

CABLE: KAHLENBERG

FAX: (920) 793-1346

MARINE PRODUCTS SINCE 1895

Model S-203C S-203 CHT •

For vessels over 75 meters in length, this design allows both whistles to exceed 143 dB (1/3 octave band). The S-2036 and

S-203 CHT are virtually mainte- nance free Durability is ensured by the use of bronze and marine aluminum construction materials through out. For the most extreme cold weather operation,

Model S-203 CHT (shown) includes a thermostatically con- trolled, heated enclosure for both the combination manual/electric valve, and the horn sounding body.

Circle 252 on Reader Service Card ^ Please send me free updated versions^ | of my AT&T cable charts.

Company

Zip

Vessel Name

The ocean bottom can be a maze of unseen obstacles, including our submarine cables. To avoid tangling with these cables, send for a free cable chart showing the exact locations of even our most recent installations. That way, you won't get caught in uncharted territory.

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