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CASE STUDY

Halliburton LockJar® system helps operator avoid nonproductive time

Avoid nonproductive time and costly fishing jobs in openhole logging operations

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Opportunity

Deep Water

Opportunity
Specific Challenge

Avoid jar activations in tight hole conditions.

REGION - GULF OF MEXICO REGION - GULF OF MEXICO

Gulf of Mexico

REGION - GULF OF MEXICO

Challenge

  • Act as a reliable power and telemetry conduit during logging operations
  • Avoid jar activations in tight hole conditions
  • Free a logging tool string if it becomes stuck

Solution

  • Provide a conductive path designed to facilitate power and telemetry
  • Create an impact load that will act on the stuck point in an uphole direction 

Result

  • Logging runs were completed without lost time associated with electrical failure
  • Tool strings were not subjected to stress wave punishment
  • Successfully freed stuck tool string

Overview 

An operator was conducting logging operations in a deepwater well using another service company’s formation evaluation tool string and wireline unit. Halliburton’s LockJar® Multi-Conductor E-Line Jar was added to the other service company’s tool string on two logging runs, and six stuck points were encountered. The LockJar system freed the tool string from all six stuck points, helping the operator avoid considerable nonproductive time, while performing flawlessly as a telemetry and power conduit. 

Challenge 

An operator in deepwater Gulf of Mexico was conducting logging operations in a well with another service company’s formation evaluation tools and wireline unit. The Halliburton LockJar® Multi-Conductor E-Line Jar was selected for this project to help avoid time-consuming and expensive stuck strings and fishing jobs in wireline logging operations.

Solution 

The versatile LockJar system features a hydraulic time delay that overcomes mechanical jar limitations by providing time for increased surface pull to work a tool string free from a tight spot without activating the LockJar system. Should the LockJar system need to be activated to free the tool string, the hydraulic time delay allows full utilization of surface pull capabilities to maximize impact load intensity on the stuck point, in combination with high-strength cable and solid weak point.

Result 

The LockJar hydraulic jar was included in two logging runs on this operator’s well, and six stuck points were encountered. The LockJar system freed the tool string from all six stuck points while performing flawlessly in its passive state as a telemetry and power conduit. The logging runs were completed without any nonproductive time associated with a stuck tool string.