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Cable Installation for
Deep Wells

Cable Tension During
Installation

Operational Situations

Working Loads

Receiving & Handling

Installation & Spooling

Operating and Maintenance

Common Abuses

Damage Caused by
Excessive Tension

Wire Line Spooling

Installation Tension for
Well Logging Cables Chart

Cable Damage Due
to Drum Crush

Figures 1 - 5

Example for a 7H42 Cable

Example for a 7H47 Cable

Cable Installation
Tensions

Installation Tension
Graph

Manual Menu

CABLE TENSION DURING INSTALLATION

During cable installation, it is very important to build up cable tension as quickly as possible so that the cable in the lower layers will have as high a tension as possible.  The higher the cable tension — the more resistant the cable is to being crushed.  This is because the armor wires act as a barrier or fence between the core and the outside world.  If a fence is pulled tight, it deflects less under any outside force.  Less deflection of the fence means less deflection of the armor wires into the core.

Camesa recommends that for installation of open hole cables including the 7/16", 15/32", and the "0.476 - Slammer" that the cable bed layer on the drum be put on at 2500 lbs, the second layer at 4000 lbs., the third layer at 5500 lbs.

The installation tension in the layers above the 3rd layer should be kept at 5500 lbs for approximately 14,000 ft. in the case of a 25,000 ft. cable.  The cable tension for the remaining cable to be installed can be tapered off at a uniform rate so that it is several hundred pounds in the outermost or top layer.

Operational Situations

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