Message sent.

Ultimate Hydraulic Mechanical Jar (UHMJ) // Outer Diameter 4 3/4" Inner Diameter 57.15 mm (2 1/4”) Length 19.6 ft Connectors 3 1/2" IF

Outer Diameter

Inner Diameter



Product Technical Configuration

Outer Diameter 4 3/4"
Length 19.6 ft
Inner Diameter 57.15 mm (2 1/4”)
Connectors 3 1/2" IF

Product country of origin: Canada

Location of the product: Canada

Available:  For Sale

Supplier reference: RIA-UHMJ-8

Original manufacturer: Wenzel Downhole Tools ULC

Finalized quotes will be sent directly to the supplier


The Wenzel hydraulic-mechanical drilling jar (HMJ) delivers hydraulic operation when jarring upward, and mechanical operation downward. Our HMJ also features a time delay to allow load variance prior to jarring up, and a safety latch mechanism to prevent unexpected jarring.

Our patented Ultimate configuration substantially increases overpull capacity to the highest in the industry.


This design features multiple high pressure chambers to deliver this high overpull capacity, and allow you to make the most of modern rigs and today's premium strength drill pipe.

Invest in an insurance policy on which you can rely.

Equip yourself with the industry-leading overpull strength of a Wenzel Ultimate drilling jar.


This pre-owned tool has been certified to be in good running order by Wenzel Downhole Tools ULC.



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.

Send sourcing request

Related Product Variants

Product Name Outer Diameter Length Inner Diameter Connectors
Ultimate Hydraulic Mechanical Jar (UHMJ) 4 3/4" 19.6 ft 57.15 mm (2 1/4”) 3 1/2" IF
Ultimate Hydraulic Mechanical Jar (UHMJ) 6 1/2" 20.5 ft 57.15 mm (2 1/4”) 4" FH

Sourcing, Rentals & Services

Looking for specific tools, deals, services, rentals, manpower or any items not currently available on RIA marketplace?

Please send us your request for quotation and we will source accordingly.