The Experimental Study on the Partition Heat Treatment Process of High Grade Wireline Coring Rod

Abstract:

In order to improve stress conditions of wireline coring drill rod and extend the service life of wireline coring drill rod to meet the special deep hole drilling and construction requirements,this paper carries out the experimental study on the partition heat treatment process of wireline coring drill rod.The experiment chooses high grade thin-walled tubes,the interval of about 300mm rod ends are bath quenching and tempering process, which ensures the mechanical properties of the quenched area,hardness and microstructure uniformity is good, while heat treatment transitional area of influence is small.Prototype manufacturing special deep hole wireline coring rod has features of strong rigidity at both ends of the connection section rigid and good toughness at central rod,the drill rod used in Shandong Laizhou site drills 2845.55m, use effect is very good.