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STANDARD HANDBOOK OF PETROLEUM & NATURAL GAS ...

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544 Drilling and Well Completions<br />

recommendations are included in API RP 9B, ”Application, Care and Use of<br />

Wire Rope for Oil Field Service” (see “Wire Rope”).<br />

Inspection and Maintenance illustrations<br />

Figures 4-19 through 4-36 are self-explanatory illustrations of generalized<br />

inspection and maintenance recommendations for each of the hoisting tools.<br />

Wire Rope<br />

Wire rope includes ( 1) bright (uncoated), galvanized, and drawn-galvanized<br />

wire rope of various grades and construction, (2) mooring wire rope, (3) torpedo<br />

lines, (4) well-measuring wire, (5) well-measuring strand, (6) galvanized wire guy<br />

strand, and (7) galvanized structural rope and strand [11,12].<br />

Material<br />

Wire used in the manufacture of wire rope is made from (1) acid or basic<br />

open-hearth steel, (2) basic oxygen steel, or (3) electric furnace steel. Wire tested<br />

before and after fabrication shall meet different tensile and torsional requirements<br />

as specified in Tables 4-9 and 4-10.<br />

(text continued on page 563)<br />

Bearing wear and<br />

sheave wobble<br />

Grease fittings<br />

Loose fasteners<br />

Loose I fasteners -1<br />

MAINTENANCE:<br />

1. Keep clean.<br />

2. Lubricate bearings.<br />

3. Remove any rust and weather protect as required.<br />

4. Check and secure all fasteners.<br />

Cracks and deformation<br />

Check all welds<br />

Figure 4-1 9. Crown block [lo].

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