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STANDARD HANDBOOK OF PETROLEUM & NATURAL GAS ...

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608 Drilling and Well Completions<br />

BASED ON A STAND LENGTH VALUE <strong>OF</strong> 100 FT.<br />

(TAKEN AS A CONVENIENT COMPROMISE BE-<br />

TWEEN 90-Fl. ANO 120-FT. STANDS.)<br />

I .E:<br />

c- 0<br />

GZ<br />

U,<br />

VIWESQ FACTOR &toSC)<br />

0 TO 6,000-Fl.OEPTH<br />

Figure 4-82. Rotary-drilling ton-mile charts [ll].<br />

Slipping and Cutoff Practice for Rotary Drilling Lines<br />

Using a planned program of slipping and cutoff based upon increments of<br />

service can greatly increase the service life of drilling lines. Determining when<br />

to slip and cut depending only on visual inspection, will result in uneven wear,<br />

trouble with spooling (line “cutting in” on the drum), and long cutoffs, thus<br />

decreasing the service life. The general procedure in any program should be

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