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Ann: Mukuyu-2 wireline logging progress update, page-322

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Kiwigeo8339

3,706 Posts.

2852

09/11/23

14:18

Post #: 70810957
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Originally posted by Kiwigeo8339: ↑

"Whaat size cable ya know used here?
whats the breaking strain of that size cable?"

The multi conductor cable they use for this sort of work is usually around 10-13mm outside diameter.
Breaking strain of the cable......probably around 5-6000lbs but don't quote me on that
Note that the cable has weak point installed which will always part before the cable does. The weak point failure tension is the critical figure you use when working out your maximum safe pull (MSP) during a wireline run. MSP is as measured at the winch so it will vary according to tool weight, amount of cable you've got paid out as well as weak point specs.

One important thing I always did as soon as I sat down for a wireline run was to check that the Winchman had the MSP and a hole diagram drawn on the unit window in black Texta. Nothing worse then getting stuck and having to furiously fumble to find your MSP calculations.

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Ok I checked my vast library of logging stuff and here's some SLB cable specs.

CABLE DIAMETER WT/FT BREAK. STRAIN (LBS)
7 - 46 15/32" 0.330 16,000
7 - 46V 15/32" 0.330 16,700
1 - 22 7/32" 0.080 5,100

CABLE WEAK BREAKING STRAIN POINTS (LBS)
Strong 5,450 - 6,900
Standard 4,800 - 5,400
Deep Well 3,500 - 4,400

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