Oil & Gas Well Downhole Drill Stem Testing Tools String APR DST Tools String The Drill Stem Testing Tools / DST tools manufactured by ZZ Top is full bore type and annular pressure operated, applicable for 4 1/2” to 20” casing, the tools OD is 3 7/8”...

Drill Stem Testing Tools Tester Valve / Circulating Valve Ball Valve Section The Ball Valve assembly is the most important part of drill stem testing tools including OMNI circulating valve/Multi - circulating valve, Select tester valve, LPR-N valve and Super safety valve. Normally, the ball valve assembly is made of Inconnel steel, which issure the hardess and make the ball valve ong life service during the well testing...

.... The drill stem testing tools are applicable for 4 1/2” to 20” casing, the tools OD is 3 7/8” and 5”, Working pressure upto 105Mpa, working temperature upto 425F, the DST tools is designed and manufactured according to NACE MR0175 standard,

15K Super Safety Valve Product Details 15K Super Safety Valve 15K Super Safety Valve is a sort of downhole safety valve which is used with BOP for the drill stem testing operation to control the well flow. So during the downhole operation, the BOP safety ...