Annulus pressure operated test tools, catalog page 22
HAMMER Jar
Full-bore hydraulic jar for freeing a stuck testing string
Description
The HAMMER jar is a full-bore tool used to free a stuck testing string.
Features
- Hydraulic delay system designed for a long service life
- Can be used repeatedly
- Delay time can be adjusted inside the jar
- Tension force can be adjusted within the strength range of the jar
Operation
Pull the string and apply tension to the jar. When the delay time has elapsed, the tension in the jar is suddenly released and an impact acts on the stuck string. Repeat these steps as necessary.
