DJ6 Hydraulic Mechanical Drilling Jar

High-Impact. Versatile. Durable.

The DJ6’s proprietary internal latch eliminates the need for external jar clamp and prevents the jar from misfiring downhole.


Overview

THE CHALLENGE

When your drill string is stuck downhole, you need a high-impact drilling jar to apply force to the stuck point in the drill string. This frees the drill string and allows you to continue drilling ahead or pull out of the hole.

Drilling jars create a delayed hammer-anvil effect, either hydraulically or mechanically.

With a hydraulic drilling jar, once the latch is released, the tool goes into metering mode. It compresses fluid until the release pressure is accomplished. At that point the fluid is released and the hammer impacts the anvil, applying a fixed force to the string.

With a mechanical drilling jar, the use of heavy drill collars or heavy weight drill pipe is key to creating a strong impact force. This is accomplished by overcoming a fixed latch setting and releasing the string weight (hammer) to the tool (anvil), applying a fixed force to the drill string.

Either type of jar can work in downward jarring operations. However, only hydraulic or hydra-mechanic drilling jars can fire upward.

The solution

Our DJ6 hydraulic mechanical drilling jars are among the toughest and most durable in the industry. With reliable, state-of-the-art design, they’re ideal for directional, horizontal and deep hole applications, on and offshore.

The DJ6 fires up hydraulically and down mechanically. It employs a proprietary internal latch to prevent accidental firing downhole. It’s available in ODs from 3.50” to 10.00”.

Benefits

DJ6 HYDRAULIC MECHANICAL DRILLING JAR BENEFITS

  • Cougar proprietary internal latch prevents jar from misfiring downhole
  • No need for external jar clamp on surface
  • Standard operating temperatures up to 250°F (121°C)
  • Seals available for temperatures up to 400°F (204°C)
  • Adjustable configuration for optimized firing impact force
  • Maximum stroke length for increased impact force
  • Ability to reset latch and return to drilling without pulling out of hole

Specs

AVAILABILITY

  • FOR SALE: all tool sizes available worldwide.
  • FOR RENT: varies by location, contact us for size availability in your region.
ENGLISH UNITS
Tool
Model
OD
(in)
ID
(in)
Length
(ft)
Weight
(lb)
Pump Open
Area (in²)
Latch Setting
Range (lbf)
Maximum Pull
for Firing (lbf)
Maximum Pull
after Firing (lbf)
Maximum
Torque (ft-lb)
DJ6-3503.5001.15018.04504.9
0–36,000*
54,000119,000
5,000
DJ6-4184.1252.00018.05507.8
0–45,000*
115,000190,000
14,000
DJ6-5004.8752.25017.070011.0
0–40,000*
84,000380,000
17,000
DJ6-6506.5502.50017.51,40016.8
0–110,000*156,000
685,000
40,000
DJ6-6756.8802.62517.51,50018.70–110,000*179,000625,00040,000
DJ6-8008.1502.81319.02,30028.2 0–110,000*291,0001,150,00068,000
DJ6-9009.1502.81319.53,10033.2
0–120,000*
361,000
1,500,000
121,000
DJ6-9509.5502.81319.53,20033.20–120,000*361,0001,500,000141,000
DJ6-100010.0003.00019.53,80033.20–120,000*400,0001,500,000170,000
SI UNITS
Tool
Model
OD
(mm)
ID
(mm)
Length
(m)
Weight
(kg)
Pump Open
Area (cm²)
Latch Setting
Range (daN)
Maximum Pull
for Firing (daN)
Maximum Pull
after Firing (daN)
Maximum
Torque (Nm)
DJ6-35089295.520431.6
0–16,000*
24,00052,000
6,700
DJ6-418105515.524950.3
0–20,000*
51,10084,500
18,900
DJ6-500124575.231771.0
0–17,700*
37,300169,000
23,000
DJ6-65016664 5.3635108.4
0–48,900*69,300
304,700
54,200
DJ6-675175675.3680120.70–48,900*79,600278,000
54,200
DJ6-800207715.91,043181.90–48,900*129,400511,50092,200
DJ6-900232715.91,406214.2
0–53,300*
160,500
667,200
164,000
DJ6-950243715.91,451214.2
0–53,300*
160,500667,200191,100
DJ6-1000254765.91,723214.2
0–53,300*
177,900667,200230,500

* Down lock loads will typically be 60-70% of the up value

**Standard operating temperatures up to 250°F / 121°C

***Seals available for temperatures up to 400°F / 204°C


Published torque specs based on ‘high torque’ configuration and materials. Please contact your Cougar Drilling Solutions sales agent for accurate torque specs on all available models.

Resources

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