Drop Ball Circulating Sub For Oil Well Downhole Testing Service
The Drop Ball Circulating Subs are the kind of circulating valve and used for oil well drill stem testing operation, fracturing operation. This circulating valves are manufactured from High strength Alloy Steel. The standard is is pin by box and activated by dropping a chrome steel ball, which lands on a sleeve and as pressure increases, the pins in the sleeve are sheared. This causes the sleeve to move down and expose four ports in the side of the sub diverting the fluid flow.

Technical parameter of Drop Ball Circulating Sub

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.