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High Output Hydraulic / Mechanical Drilling Jar - (HO-HMJ)

Home  ›  Products  ›  High Output Hydraulic / Mechanical Drilling Jar – (HO-HMJ)

Description

In today’s Drilling applications longer reach Horizontal sections are becoming more popular. With that in mind it has also become more difficult to determine just how much pull the drilling jars are being subjected to. We are seeing more Drilling jars with damages due to being over pulled and no longer able to fire.

Challenger Downhole Tools has worked to help alleviate this situation by creating High Output Drilling Jar. The HO-HMJ (High Output-Hydraulic / Mechanical Drilling Jar) is capable of withstanding up to 50% greater pull during delay; this will help eliminate the damage to jars being over pulled and rendering them useless.

The HO-HMJ has 50% greater pulling power during delay than any other Drilling Jar of comparable size. This ability to pull harder during delay also will increase the impact of the jar once it does fire providing a significantly greater hitting force.

With longer reach horizontals being drilled and greater amounts of hole drag being created, the Challenger HO HMJ, (High Output-Hydraulic / Mechanical Drilling Jar) has been designed to function in these environments. The HO-HMJ is very effective in Horizontal applications providing Weight or Pull can be applied to the Drilling Jars.

Features & Benefits

  • The Jar is normally operated in the latched position to reduce unexpected jarring while drilling, and eliminate movement between jar components to increase service life.
  • The Jar operates with a simple up and down motion and is not affected by torque.
  • Standard seals in the tool are effective to 250°F (120°C). The jar can be dressed with seals effective to 400°F (200°C) for hot hole environments. External sealing surfaces are tungsten carbide-coated to enhance wear and corrosion resistance.
  • The Jar can be run in tension or in compression within the preset latch settings.

Operation

Jarring Up

  • Jarring up is achieved by applying sufficient over pull to overcome the latch setting, which initiates the hydraulic time delay. During the time delay, the over pull at surface can be adjusted to vary the impact force.
  • After impact, apply a down force sufficient to close jar and re-engage latch, then repeat the jarring cycle as required.

Jarring Down

  • Jarring down is achieved by applying sufficient downward force to overcome the latch setting and pump open force. At that point, the Jar will release and jar downward.
  • After impact, pick up the work string to re-engage the mechanical latch then repeat the jarring cycle as required.
 

Imperial

Nominal OD (inch)
Length (ft)
Thru Bore (inch)
Approx. Weight (lbs)
Pump Open Area (in2)
Torsional Limit (ft lbs)
Nominal Up Latch Setting (lbs)
Nominal Down Latch Setting (lbs)
Max Pull During Delay (lbs)
Tensile Yeild (lbs)
4.75 19.6 2.25 765 11.8 20,000 55,000 30,000 132,000 391,000
5.25 19.6 2.25 890 11.8 31,500 55,000 30,000 132,000 391,000
6.25 20.5 2.25 1,570 19.6 48,500 90,000 40,000 250,000 777,000
6.50 20.5 2.25 1,630 19.6 52,400 90,000 40,000 250,000 777,000
6.62 20.6 2.75 1,600 21.7 53,800 90,000 40,000 250,000 722,500
6.75 20.5 2.75 1,760 23.8 48,800 95,000 42,000 270,000 907,500
8.00 20.7 2.81 2,600 30.7 98,000 100,000 45,000 400,000 949,000

Metric

Nominal OD (inch)
Length (m)
Thru Bore
Approx. Weight (kgs)
Pump Open Area (mm2)
Torsional Limit (N•m)
Nominal Up Latch Setting (daN)
Nominal Down Latch Setting (daN)
Max Pull During Delay (daN)
Tensile Yeild (daN)
121 6.0 57.2 350 7 606 27 120 24 460 13 340 58 710 173 900
133 6.0 57.2 400 7,606 42,710 24,460 13,340 58,710 173,900
159 6.2 57.2 710 12,664 65,760 40,030 17,790 111,200 345,600
165 6.2 57.2 740 12,664 71,040 40,030 17,790 111,200 345,600
168 6.3 69.9 730 13,968 72,940 40,030 17,790 111,200 321,400
171 6.2 69.9 800 15,323 66,160 42,260 18,680 120,100 403,700
203 6.3 71.4 1,180 19,806 132,870 44,480 20,020 177,920 422,100

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