Hydraulic Jar / Big John Jar For DST service Fracturing Service

The Big John Jar is a kind of hydraulic jar used in drill stem testing service. The hydraulic jar is the part of tool string to help remove stuck tools.
The hydraulic jar helps free a stuck tool or tool string by resisting a pull on the workstring, when the workstring is stretched by the pull, tension in the jar is released and an upward impact is delivered to the stuck tool. The pulling strength of 5” Big John Jar is 222.2kN.

Features and Benefits of Hydraulic Jar

• Design of the hydraulic system ensures long life with little maintenance.
• Rig time is reduced.
• Jar can be re-cocked rapidly.
• Jar time delay is adjustable.
• Amount of pull to trip the jar can be varied within the limits of the time- delay system.

Technical parameter of Hydraulic Jar

ZZ TOP Oil Tools Co., Ltd located in XI’AN City in China, we are in full service on design, production and supply of oilfield downhole tools and Wellhead Equipment.

Over more than 10 years, we become a fast growing organization, now our two sub-factories, equipped with CNC lathes, Miller, deep-hole drilling &boring machine and other advanced machines, have enough production capacity to meet the customers’ requirement. And we build a professional & strong team including technical, sales, logistic and leading management department, which make our company success of manufacturing and providing cost-effective downhole tools and create added value for customers around the world.

Now our tools are supplied to worldwide and enjoy the good reputation.We always focus on providing the our clients with highly efficient & expertized service and approach each enquiry with meticulous attention to technical specifications and insist on “Traceability, Serialization” for each tools. We will keep innovating and providing more durable products and reliable service for worldwide customers.