Winching operations

Inverter to the motor segments the strong external circuits induction pulse signal interference. Electromagnetic interference on the line in the winch operation process, the test results is shown in Figure 4. 

Winch operations can be particularly hazardous for both powered and/or non powered plant and need to be carefully monitored to ensure that anchors and lines arc not overloaded and that they are not fouled by other vessels or fishery equipment (Figure 5.12). There is limited guidance on the use of winches in this environment although the CIP Construction Manual covers some issues. A summary guide for good practice is given in the box below and Section 2.2.8. 

Helicopter Tie Down Points Safety Net Access Points Winching Operations Normally Unattended Installations Chapter 4 Visual Aids General... 

Consider the connector, often a winch connected to the tripod or davit system that allows the attendant to raise and lower the entrant. Always use mechanical devices that are rated for personnel use (not just materials) and incorporate fail-safe back-up braking systems in case the winch operator loses control of the crank. Some winches have a power drive option allowing automatic or manual operation, very beneficial when raising/lowering for long periods of time. 

Figure 8.5, Hydraulic winch operating system of a fishing vessel...

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. 

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. 

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,... 

Smith [25] has described a device for sampling immediately above the sediment water interface of the ocean. The device consists of a nozzle supported by a benthic sled, a hose, and a centrifugal deck pump, and is operated from a floating platform. Water immediately above the sediment surface is drawn through the nozzle and pumped through the hose to the floating platform, where samples are taken. The benthic sled is manipulated by means of a hand winch and a hydrowire. 

Operationally, it is not always easy lo determine whether a giien sample is a rmcroemulsion or macroemulsion. However, the formal differences between microeinulsions and macroemulsions are well defined. A micmcmulsinn is a single, thermodynamically si.ible. equilibiium phase, a macroemulsion is a dispersion of droplets or particles lhat contains two nr more phases, winch are liquids or liquid crystals... 

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