Drill Stem Test is a procedure to determine pressure, permeability in well and the authentic test to estimate productive capacity in oil and gas well before well production.
DST is consist of a packer or packers to Isolate the target zone and control the well flow, to conduct the fluid to surface and obtain the downhole information
The drill-stem testing is to maximize oil reserves, accelerate the exploration schedule and reduce oil production costs and risks associated with drilling.
The whole drill stem testing tools include Round Mandrel Slip Joint, Tubing String Tester Valve (TST), OMNI Valve(Multi Circulating Valve), Rupture Disk Safety Circulating Valve, Rupture Disk (RD) Sampler, Drain Valve, Select Tester Valve, LPR-N Valve, Gauge Carrier, Hydraulic Circulating Valve, Hydraulic Jar (Big John Jar/ BJ jar),RTTS safety joint, RTTS Circulating Valve, RTTS Packer, Champ packer, Radial shock absorber, Vertical shock absorber.