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Hydra-Mech Double Acting Jar (HMDA) // Outer Diameter 6 1/2" Inner Diameter 69.85 mm (2 3/4") Length 23 ft Connectors 4 1/2" IF

Outer Diameter

Inner Diameter



Product Technical Configuration

Outer Diameter 6 1/2"
Length 23 ft
Inner Diameter 69.85 mm (2 3/4")
Connectors 4 1/2" IF

Product country of origin: Canada

Location of the product: Canada

Available:  For Sale

Supplier reference: RIA-HMDA-3

Original manufacturer: Wenzel Downhole Tools ULC

Finalized quotes will be sent directly to the supplier


For safe handling and predictable jarring action during operation, the Wenzel double-acting hydraulic mechanical (HMDA) jar provides effective jarring action in both directions. The HMDA is designed to deliver a hydraulic delay when jarring in both the up and down directions.

What makes this jar different is the mechanical latch that keeps the jar locked in the neutral position. This latch eliminates unexpected jarring during operation and handling--and keeps people safe.


The HMDA, like all other Wenzel jars, is designed without housing ports to the annulus. Such ports can restrict jar stroke, impact strength and seal integrity.

We have also minimized the number of oil chambers, which in turn reduces the seals required and increases jar reliability.



At Wenzel, our downhole tools and service are born out of your specific drilling needs.

We take pride in our work and in your success. When you choose Wenzel, you’re not just another customer–you’re part of the family.

Our offering goes far beyond what you’ll find on this site. If you are searching for a drilling solution that can’t be achieved with the products and specifications found within these pages, work with us to engineer and manufacture one that will get the job done.


Wenzel’s culture of safety, customer focus, exceptional quality and continuous innovation is a source of pride and identity. From the selection of steel to customer delivery and maintenance, our processes and people set the industry benchmark for conscientious and reliable offerings. Everyday, we work to pioneer and patent new concepts in product capabilities for unique drilling situations, and continuously improve our quality management system.

All material is of impeccable quality and sourced from well-respected suppliers in G7 countries. We track each product component’s lifecycle, reaching back to the mill certification and material base element composition. Our comprehensive manufacturing capability includes state-of-the-art equipment, certified engineers and journeyperson machinists and programmers.

Our specialized tungsten-carbide coating application processes include High Velocity Oxygen Fuel (HVOF), High Velocity Air Fuel (HVAF) and Plasma Transfer Arc (PTA). HVAF and PTA systems use automated robots to apply coatings, ensuring accurate and consistent repeatability.

All manufactured parts are subject to a 100% dimensional inspection.

The men and women in our shops are experienced tradespersons, certified engineers and highly knowledgeable, skilled professionals. We work shoulder to shoulder – within our company, with our suppliers, vendors, certified distributors and with you – to advance technology and provide leading downhole drilling solutions.

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Related Product Variants

Product Name Outer Diameter Length Inner Diameter Connectors
Hydra-Mech Double Acting Jar (HMDA) 6 1/2" 23 ft 69.85 mm (2 3/4") 4 1/2" IF

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