Slickline · Intervention
Slickline Tool String
The stack of tools hung from the wire: weight bars, jars and, at the bottom, the tool that does the job, such as a bailer or a paraffin scraper.
What it does
Weight bars give the string mass against well pressure. Slickline jars have free travel to build momentum and can be fired repeatedly to set, shear or free tools. A bailer collects sand and debris; a scraper clears wax from the tubing.
Basics
| Weight bars | Mass for the string |
| Jars | Free travel, fire repeatedly |
| Bailer | Collects sand and debris |
| Scraper | Removes paraffin from the tubing |
Common failures
- Tools stopped by wax or sand in the tubing
Troubleshooting
- Symptom
- Tools stop short of the target depth
- Likely cause
- Paraffin or sand in the tubing
- What to check
- Run a scraper or bailer first