Winch

Figure 5.37 depicts the basic set up of a wireline logging operation. A sonde is lowered downhole after the drill string has been removed. The sonde is connected via an insulated and reinforced electrical cable to a winch unit at the surface. At a speed of about 600m per hour the cable Is spooled upward and the sonde continuously records formation properties like natural gamma ray radiation, formation resistivity or formation density. The measured data is sent through the cable and is recorded and processed in a sophisticated logging unita the surface. Offshore, this unit will be located in a cabin, while on land it is truck mounted. In either situation data can be transmitted in real time via satellite to company headquarters if required. 

The modem winch is constmcted of stainless steel and may be built foi atmospheric temperatures or it may be a heavy-walled, sealed unit suitable for high temperature/high pressure work. Sophisticated controls are added to monitor the entire dye cycle and ensure that dyeings are as consistent as possible. 

Another extremely popular machine of this type is the jet dyeing machine which conserves energy by reducing the cloth-to-Hquor ratio to 1 10 or lower as compared to 1 20 for the winch. In this machine, the fabric which is in a rope form is transported by movement of the dye Hquor through a Venturi jet. This method provides intimate contact between the dye Hquor and each meter of material. The machine operates at 40—135°C. 

Overflow machines (Fig. 12) may be thought of as hybrids of jets and winches. They usually feature a winch reel which, unlike the cloth-guiding roUer in a jet, is normally driven and provides motive power to the fabric. There is also some driving force on the cloth from the circulation of the Hquor through the overflow tube down which they both pass. Both pressurized and nonpressurized versions exist and are available from a large number of different makers. 

Specification for general purpose electrical power driven winches for lifting and hauling... 

Applications include electric motor drives for conveyors and other material handling equipment such as stacker reclaimers, crushers, haulages, ball mills, cranes, hammer mills, rotary dryers, centrifuges, reciprocating pumps, winches, fans and wire drawing machines. 

Steel works conveyors, crushers, w agon tipplers, skid gears, furnace charges, bogie drives in bogie hearth furnaces, furnace winch drives, cranes, pumps, compressors and fans. 

The 211 control rods were moved in and out of the core by winches driven by electric motors. Power and neutron flux distribution were measured by in-core self-powered ion chambers, which were inaccurate at lower power. At low power, ion chambers in the graphite reflector were used. 

The HFBR core uses fully-enriched (93%) uranium oxide-aluminum cermet curved plates dad m aluminum. The core height is 0.58 m and the diameter is 0.48 m or a volume of 103.7 Itr. The U-235 weighs 9.83 kg supported by a grid plate on the vessel bottom. The coolant flow u downward. Iience. How reversal is necessary for natural circulation. It operating temperature and pressure are 60 ( and 195 psi. There are 8 main and 8 auxiliary control rod blades made of europium oxide (Lii A)o and dysprosium oxide (DyjO,), clad in stainless steel that operate in the reflector region. The scram system is the winch-clutch release type to drop the blades into the reflector region. Actuation of scram causes a setback for the auxiliary control rods which are driven upward by drive motors,... 

Interspersed among the principal lattice positions are 162 secondary positions for 66 safe Is, instrument rods, tie bolts connecting the water plenum to the top shield, and special components. The safety rods use a winch-cable system that releases when the clutch is deenergized to drop the safeu rods into the core. 

Let us then consider an arbitrarily selected point in a pipe in winch gas and solid particles are flowing. The flow of the mixture of gas and solid parti cles need not be homogeneous, i.e., the concentration of particles may vary across the cross-section of the pipe. This means that the mixture ratio p. should generally be regarded as a function of position in the pipe, and therefore the definition, Eq. (14.1), should be replaced by... 

The radiant section tube coils of horizontal fired heaters are arranged horizontally so as to line the sidewalls and the roof of the combustion chamber. In addition, tliere is a convection section of tube coils, winch are positioned as a horizontal bank of tubes above the combustion cham her. Nonnally the tubes are fired vertically from the floor, but they can also be fired horizontally by side wall mounted burners located below the tube coil. Tins economical, high dficiency design currently represents the majority of new horizontal-tube-t1icd heater installations. Duties run from 5 to 250 MMBtu/hr. Six types o) horizontal-tube-fired heaters arc-shown in Figure 3-21. 

The roinnil.troi ethyl aceioacetale would ini]jly the properties of, i ketone,, i icw winch is borne out by its reduction to a hydro. y-.ieid,... 

In France only stt-am stills are used, to the eiclusinn of apparatus used with open hivs, winch in burniug the Gower somewhat impart-s to ihe esseutial oil a slighily hnrui odour thr French ottos obtained with dleam dn not otTer Ihis drawback. 

Winde,/. windlass, winch jack hoist worm (screw) bindweed (Glass) stria, winden, v.t. wind, coil, reel, roll, twist. — v.r. wind, coil, wriggle. —fgewimden, p.a. wound, coiled, rolled, twisted, spiral. 

The lever is such a part of everyday activity that its application usually requires no conscious thought the pop top on a soda can, a doorknob, a wrench, pliers, a fishing pole, a faucet with a handle that lifts, a wheelbarrow, fingernail clippers, and so on. The crank and winch used to pull a heavy boat out of the water up onto a trailer can be thought of as a lever in circular form. 

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