Sour Service Cable Seasoning Procedure

1. Importance of Tension and Speed

1.1 Initial Operation Requirements

The first 5–10 runs shall be operated at a low speed of 30–35 m/min.

1.2 Tension Control During Running In Hole

When running the cable into the wellbore, the tension reduction must not exceed 20%.

Example: With a static tension of 1,000 lbs, the running speed should be controlled so that the cable tension remains above 800 lb.

1.3 Torque Balancing Procedure

For every 600 m of cable deployed, pause the operation for approximately 30 seconds to allow the tool to rotate freely and balance the torque of the armored wires.

Alternatively, slowly pull up the cable by 30–60 m to assist torque release.

This procedure is especially important in directional wells and operations using tools equipped with centralizers.

1.4 Restarting After Direction Change or Shutdown

When restarting after direction change or shutdown, run in slowly and maintain tension at least 20% above static tension.

Example: With a static tension of 1,000 lbs, maintain tension no less than 1,200 lbs during pull-out.

Packer pressure and friction in deviated wells are included in the above tension requirements.

1.5 Packer Operation Recommendation

It is recommended that the packer not act on a moving cable, especially alloy cables.

2.Operating Notes for Alloy Cables

Alloy corrosion-resistant armored wires do not “self-lock” due to interlayer friction. Therefore, alloy cables shall always be used and maintained per new cable standards.

Under tension, inner armor wires embed slightly into the insulation layer, resulting in less overall rotation; the outer armor rotates freely while the inner armor cannot rotate independently.

When sufficient torque accumulates in the outer armor, it will drive the inner armor to rotate.Accordingly, all above specifications must be strictly followed when logging with alloy cables.

3.Key Control Points

All above specifications shall be complied with, among which speed and tension are the most critical.

These two parameters are the easiest to control, and improper control is most likely to cause severe cable damage.

Monitor the tightness of the outer armor closely during operation to effectively extend cable life and avoid failures.

4.Cable Running Speed Specifications

Depth	Standard Cable	Alloy Cable
0–30 m	10 m/min	10 m/min
30–60 m	20 m/min	20 m/min
200 m to Total Depth (TD)	Follow the 67/133 Rule	30 m/min

67/133 Rule

Running In Hole (RIH): Tension at any depth ≥ 67% of (Cable Weight + Tool Weight)

Pulling Out of Hole (POOH): Tension at any depth ≤ 133% of (Cable Weight + Tool Weight + Frictional Resistance)

80/120 Operating Rule

Running In Hole (RIH): Tension ≥ 80% of (Cable Weight + Tool Weight)

Pulling Out of Hole (POOH): Tension ≤ 120% of (Cable Weight + Tool Weight + Frictional Resistance)

Cable Installation Suggestion