Pump Out Reverse Circulating Valve / Circulating Sub For Drill Stem Testing Service

The Pump Out Reverse Circulating Valve is a Hollow Plug Impact type Circulating Sub. The Pump Out Reverse Circulating Valve is used in the more difficult well testing operations, where depth and high-pressure differential across the plug sometimes make it difficult to open a conventional reversing sub.

The Pump Out Reversing Sub allows removal of free oil or gas in the pipe (minimizing the risk of fire) while the tool is coming out of the hole. It is also used to circulate and condition the drilling fluid when necessary.

The Pump Out Reversing Circulating Valve / Circulating Sub also equipped with a shear pin with plate to be a backup device in case the plug can not be broken by flute bar, applying the tubing pressure, the pin can be sheared by the pressure and build the communication.

Technical parameter of Pump Out Reverse Circulating Valve

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.