Technical Tips Every Field Logger Should Know

Logging in the field is a demanding profession that combines technical expertise, safety awareness, and practical efficiency. As Mount Sopris Instruments Chief Technology Officer Curtis puts it,

“Anyone who has logged long enough will eventually have a day where things go bad or came close to being bad.”

The key to success is learning from those moments and from the advice of experienced loggers who have been there before. Below are some of the top recommendations for new and seasoned loggers alike, covering equipment care, safety, efficiency, and technical best practices.

Advice for New Loggers

Protect the wireline.

The wireline is your lifeline in logging. Avoid kinking or bending it beyond its specified bend radius—typically 7–9 inches (18–23 cm) for common single- and four-conductor cables. Always use sheave wheels larger than that radius to extend the life of the cable.

Check the cablehead frequently.

Use a high-range multimeter to confirm electrical isolation of at least 20 MΩ before connecting a tool. This quick 15-second check should be done every time you switch tools. If the cablehead doesn’t meet the threshold, you will need to rehead your cable.

Minimize distractions.

Never chat while actively logging. Even a brief conversation can result in missed depth readings, tangled wireline, or worse. If you must interact with a colleague or customer, stay especially vigilant near the bottom of the hole to avoid creating a “rat’s nest” of cable.

Safety First

Field conditions are unpredictable, but you can reduce risks with a few precautions: – Power down before handling tools. Resistivity tools should always be turned OFF before placing them in or removing them from the borehole. Failure to do so can result in electric shock.

• Ground your equipment. Generators in remote areas can produce unstable power. Use additional grounding rods when needed for the winch or generator.
• Prevent trip hazards. Thin wireline can be easy to overlook. Safety cones around cable paths help protect both people and equipment.
• Know your gear. Familiarity with your setup allows you to react quickly if something goes wrong.

Working Efficiently

Efficiency in logging is less about rushing and more about preparation and organization: – Stay organized. A clean, well-laid-out logging truck makes set-up and take-down much faster. Develop a consistent workflow or standard operating procedure to minimize downtime.

• Test equipment in advance. Don’t wait until you’re onsite to find out a probe isn’t working. Run through your setup in the shop before heading out, especially if it’s been a while since the last job or you’re using unfamiliar tools.
• Be prepared. Confirm your probes, winch, and system are field-ready before arriving at a jobsite. This preparation saves both your time and your customer’s.

Technical Tips for the Field

Small details often make the difference between a smooth logging run and wasted hours: – Never assume a freshly reheaded cablehead is good—test it.

• Learn how to rehead properly.
• Always bring a digital voltmeter (DVM).
• Carry spare parts for quick fixes; leave major repairs for the shop.
• Verify valid tool readings on the surface by logging in time mode. Zeros will record flat lines and waste your entire run.
• Double-check connections—“Is it plugged in?” is a surprisingly common oversight.
• Watch for depth errors caused by a dirty encoder wheel.
• Use clean, reliable power—cheap power sources lead to bad data.
• Don’t leave probes baking in the sun before use.
• Collect good data the first time. Bad data can’t be fixed later.
• If you suspect a tool issue, rerun that section for a repeat log. You might not get another chance.

Final Thoughts

Logging is equal parts technical know-how, discipline, and field awareness. Mistakes are inevitable, but by following expert advice—protecting your wireline, prioritizing safety, staying organized, and double-checking data—you’ll avoid many of the pitfalls that can derail a logging job. As Curtis reminds us, every logger has a tough day eventually. The difference between a minor hiccup and a major problem often comes down to preparation, attention, and applying lessons learned from those who have logged before you.