Avoiding cable damage whilst Pipe-Conveyed Logging

10 October 2013 Hi folks

Our pipe-conveyed logging (earlier discussion) went well and we were able to achieve the data objectives.

However, we noted that there is potential for cable damage at surface when the slips are set.  At that moment the side-entry sub has been installed, with the cable fed through, the packoff secured and this is below the rotary table.. and now there's cable on the outside of the drillstring.

When the slips are set there is not much room for the cable which can get crimped.  We are looking at options which include:

1.  Use of grooved Bushings, with the groove cut to accommodate the cable.  That way it is recessed when the slips are set.

2.  Removing a segment of the slips.

I am familiar with Option 1. But then we get into a discussion about who will supply this; I am used to it being supplied by the electric-line company.  But, in discussions, the point was raised that there may be many different rotary openings and rigs and so it wasn't so practical to expect the logging company to provide; furthermore it involved modifying equipment normally provided by the Drilling contractor.

We'd be interested in the members' views on the above and in particular if you have come across (and overcome) any objections to modifying equipment.

Thanks and kind regards

Dave

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