RTTS safety joint                               Sleeve Type Drain Valve                                  Hydraulic Jar API standard RD Sampler testing tools made in China RD Sampler is a full bore sampler which is used in cased hole and is operated by annulus pressure.  It is mainly used in the full bore  formation testing jobs  to get the formation fluid sample under downhole  pressure state.  The entire tset tube string is kept full boreRead More →