It is crucial to select the correct drilling jar and placement for each well – a drilling jar is expected to work properly when stuck to avoid expensive fishing operations or a BHA loss downhole.
Correct OD selection, BHA placement, and tool specifications that meet or exceed your drilling requirements, cover the basic criteria to take into consideration when selecting a drilling jar. Below you will find the recommended ODs for various hole sizes:
| HOLE SIZE | RECOMMENDED DRILLING JAR SIZE OR SIZES |
| 34" | 9 1/2" and 10" |
| 28" | 9 1/2" and 10" |
| 22" | 9 1/2" and 10" |
| 17" | 9" and 9 1/2" |
| 16" | 9" and 9 1/2" |
| 12 1/4" | 8" and 9" |
| 12" | 8" and 9" |
| 8 1/2" | 6 1/2" and 6 3/4" |
| 8 3/8" | 6 1/2" and 6 3/4" |
| 6 1/8" | 5" |
| 6" | 5" |
| 5 5/8" | 4 1/8" and 5" |
Poor selection and placement will risk your drilling operations. At Cougar, we resolve the issue. Offering three drilling jar models, OD's from 3.50" to 10.00", you can rest assure that you will find the correct jar for your application. Cougar also offers jar placement services and software to ensure long life and reliability of the tools, and it will also ensure the jar can be fired as intended with maximized jarring forces.
COUGAR DRILLING JARS AVAILABLE
Count on Cougar Drilling Solutions for your drilling jar needs. Please contact a representative for direct sales or for rental availability in your region.