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HMDA

UHJDA Product Flyer

Product Catalog

Imperial

Nominal OD
(inch)
Length
(ft)
Thru Bore
(inch)
Tensile Yield
(lbs)
Torsional Limit
(ft lbs)
Nominal Up Latch Setting
(lbs)
Nominal Down Latch Setting
(lbs)
Max Pull During Delay
(lbs)
Free Stroke Up/Down (inches)Total Stroke
(inches)
4.7518.32.25370 60021 50055 00030 00085 0008.025.0
6.5019.72.75 1 220 00051 00090 00040 000175 0008.025.0
6.75 17.92.751 220 00051 50095 00042 000190 0008.025.0
8.0019.72.811 293 900103 200100 00045 000240 0008.025.0
9.5020.63.002 106 900189 300 110 00050 000300 0008.025.0

Metric

Nominal OD
(mm)
Length (m)Thru Bore (mm)Tensile Yield (daN)Torsional Limit
(Nm)
Nominal Up Latch Setting
(daN)
Nominal Down Latch Setting
(daN)
Max Pull During Delay
(daN)
Free Stroke Up/Down
(mm)
Total Stroke
(mm)
1215.657164 80029 10024 50013 30037 800200640
1656.070542 70069 10040 00017 80077 800200640
1715.570542 70069 80042 30018 70084 500200640
2036.071575 500139 90044 50020 000106 800 200640
2416.376937 100256 70048 90022 200133 400200640

Double Acting Hydraulic / Mechanical Drilling Jar

The Park City Downhole Tools Hydraulic – Mechanical Double Acting Drilling Jar (HMDA) is a double acting jar, designed to deliver hydraulic delay when jarring up or down, complete with a mechanical lock in each direction. The HMDA incorporates a latch mechanism to keep the jar locked in the neutral position and eliminate unexpected jarring while tripping or racking back on the derrick.

Features & Benefits
  • The HMDA is normally operated in the latched position to reduce unexpected jarring while drilling and eliminate movement between jar components, increasing service life.
  • The HMDA operates with a simple up and down motion and is not affected by torque.
  • The spline drive and latch mechanism are enclosed in a single, sealed oil chamber without ports to the annulus.  Such ports on other jars may fill with cuttings and restrict the down jar stroke.
  • The hydraulic delay mechanism is located in a separate chamber to prevent contamination and increase reliability.
  • Impact force is controlled by the metering device that ensures consistent delay times over the full range of operating temperatures.
  • With the latch mechanism in the latched position, the inner mandrel and outer housing act integrally, virtually eliminating seal and inner tool wear during normal drilling conditions. There is no need to extend or open the jar before running in the hole.
  • 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 HMDA can be run in tension or in compression within the preset latch settings.
Operation

Jarring Up

  • Jarring up is achieved by applying sufficient overpull to overcome the latch setting, which initiates the hydraulic time delay. During the time delay, the overpull at surface can be adjusted to vary the impact force. See the table for the maximum load during delay.
  • 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. During the time delay, the load at the surface can be adjusted to vary the impact force. See the table for the maximum load during delay.
  • After impact, pull up with enough force to re-engage the mechanical latch then repeat the jarring cycle as required.
Gallery

HMDA

HMDA Product Flyer

Product Catalog

Technical Specifications

Imperial

Nominal OD
(inch)
Length
(ft)
Thru Bore
(inch)
Tensile Yield
(lbs)
Torsional Limit
(ft lbs)
Nominal Up Latch Setting
(lbs)
Nominal Down Latch Setting
(lbs)
Max Pull During Delay
(lbs)
Free Stroke Up/Down (inches)Total Stroke
(inches)
4.7518.32.25370 60021 50055 00030 00085 0008.025.0
6.5019.72.75 1 220 00051 00090 00040 000175 0008.025.0
6.75 17.92.751 220 00051 50095 00042 000190 0008.025.0
8.0019.72.811 293 900103 200100 00045 000240 0008.025.0
9.5020.63.002 106 900189 300 110 00050 000300 0008.025.0


Metric

Nominal OD
(mm)
Length (m)Thru Bore (mm)Tensile Yield (daN)Torsional Limit
(Nm)
Nominal Up Latch Setting
(daN)
Nominal Down Latch Setting
(daN)
Max Pull During Delay
(daN)
Free Stroke Up/Down
(mm)
Total Stroke
(mm)
1215.657164 80029 10024 50013 30037 800200640
1656.070542 70069 10040 00017 80077 800200640
1715.570542 70069 80042 30018 70084 500200640
2036.071575 500139 90044 50020 000106 800 200640
2416.376937 100256 70048 90022 200133 400200640

Specifications are based on as new condition and are subject to change without notice.

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Brad Martens

Brad Martens has 39 years of experience in management and sales roles, both domestic and international. A belief in quality and performance of products sets Park City apart from competitors. Providing value and putting the customer first is critical to our success.

Bob Howard

Mr. Howard has 46 years industry experience and has held operations management positions both domestically and internationally.  Bob  is a strong proponent of “uncompromised quality” with a dedicated commitment to meeting Customers’ performance expectations.

Bob Ferguson

Bob Ferguson is the CFO of the newly formed Park City Drilling Technologies. Bob has more than 30 years experience and has held various senior financial roles in the oil and gas industry.

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