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Drilling Jar Selection and Placement

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

DJ6 - Hydraulic Mechanical Drilling Jar - Proprietary Internal Latch

  • The DJ6 fires:
    • Up - Hydraulically
    • Down - Mechanically
  • This jar is ideal for vertical, directional, and shallow hole applications.
  • It employs a proprietary internal latch to prevent accidental downhole while drilling, RIH or POOH.

DJ10 - Dual Hydraulic Drilling Jar - Proprietary Internal Latch

  • The DJ10 fires:
    • Up - Hydraulically
    • Down - Hydraulically
  • This jar is ideal for directional, horizontal, and deep hole applications.
  • The lock loads can be tailored to optimize performance in specific drilling scenarios. 
  • It employs a proprietary internal latch to prevent accidental downhole while drilling, RIH or POOH.

DJ12 - Dual Hydraulic Drilling Jar - NO Proprietary Internal Latch 

  • The DJ12 fires:
    • Up - Hydraulically
    • Down - Hydraulically
  • The DJ12 is the only Cougar jar that does not have an internal latching mechanism.
  • Open metering that can fire the jar upon command without overcoming a lock load.
  • The DJ12 is ideal for directional, horizontal, deep hole applications, fishing, and coring operations.
  • Includes the external Cougar Safety Clamp.

Count on Cougar Drilling Solutions for your drilling jar needs. Please contact a representative for direct sales or for rental availability in your region.

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