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The manufacturers listed here also have other models available in a range of sizes and styles. Visit their Web sites or a local dealer for more details.Farmers love their little rigsUtility tractors are a popular topic of conversation in the Machinery Talk discussion group at Agriculture Online[TM] (www.agriculture.com). One farmer says cost plays a part in deciding to go with a smaller tractor. Models this size run anywhere from $20,000 to $50,000, depending on the configuration and options."When people buy small tractors, they''re usually price-motivated," he says. "Massey Ferguson sells a lot of these tractors, and the reason is that the Perkins is a good motor and they''re affordable."A Canadian organic farmer tells the group he uses his Universal 640 TDC and Massey Ferguson 65 with a mower, PTO auger, three-point hitch, and forklift nearly every day. He spreads gravel, moves heavy items, plants trees, digs rocks in the field, and removes snow in the winter.

OTHER DATA: Typical of Bohai No. 5.WORK AREA: Bohai Gulf, China.BOHAI NO. 9RIG DESIGN: Bohai Oil Design Co., VHT 905.CONSTRUCTION: Dalian Shipyard, 1984.OTHER DATA: Same as Bohai No. 7.BOHAI NO. 6RIG DESIGN: Jack-upCONSTRUCTION: Bethleham Shipyard, Singapore, 1979.PERFORMANCE: Water depth--76 m; Drilling depth--6,000 m.QUARTERS: 93 persons.HULL: 50.6 m x 33.2 m x 4.9 m.VARIABLE LOAD: 1,837 t.HELIPORT: 18.29 m x 33.22 m x 4.88 m.STORAGE: Mud & Cmt Bulk--170 cu m; LiquidMud--238.2 cu m; Fuel--263.4 cu m; Water for

Pump it up"Centrifugal pumps have become more robust, scootercarryingbag with much tighter tolerances and stress analyses of components to increase efficiency and machine time to failure," according to Bruce scootercarryingbag Smith, North American sales manager for Fristam Pumps Inc., Middleton, Wis. Shaft deflection that results in moving parts hitting stationary components in the pump is a major contributor to pump failure, and manufacturers are addressing that concern.Liquid ring pumps are coming into play in the industry as an alternative to standard centrifugal pumps, adds Smith. Although these scavenger pumps have been around for a quarter of a century, pharmaceutical manufacturers have embraced the technology and forced redesigns that have expanded their applications. Liquid ring pumps are particularly adept at handling fluids with entrained air, an issue with cream, which tends to foam during transit. Liquid ring pumps do a superior job in fully evacuating a tank, a material-savings advantage that appeals to ice cream manufacturers and liquid egg processors, according to Smith. Pump improvements have been accelerated with the application of computational fluid dynamics (CFD) software, points out Russell Jones, business development manager-pumps for Alfa Laval in Pleasant Prairie, Wis. "From an R&D point of view, CFD is a big advance in optimizing design and increasing pump efficiency," he says. The technology has been instrumental in boosting pump efficiencies from the 40 percent range to 60 to 70 percent in recent years.