Heavy_Weight.pdfVIP

103 G R A N T P R I D E C O Heavy Weight Drill Pipe Tube Materials Mechanical Properties Minimum Minimum Yield Strength Tensile Strength psi psi 55,000 95,000 Traceability Material and process trace-ability are maintained foreach Heavy Weight Drill Pipe component. For the tool joints, the mill material certifications are confirmed by incoming testing and each tool joint blank is given a three-digit heat code. This code is traceable through the manufacturing process. The heavy weight drill pipe tube is given a per- manent identification number. Mechanical properties for tool joint materials are tabulated on page 17 of this catalog. Grant Prideco Heavy WeightDrill Pipe is manufacturedby welding extra-long tool joints to heavy wall tubes. Standard heavy weight tool joints are manu- factured from AISI 4142H-4145H modified drill collar material. The heavy weight pipe body is manu- factured from AISI 1340 material. Extra-long tool joints are designed to provide increased space for con- nection rework. Materials Cold Rolling Drill pipe undergoes repeated,severe tensile stresses during adrilling operation. These cyclic stresses are particularly focused on the thread roots and can cause pipe failure. Grant Prideco helps alleviate this prob- lem by compressing (“cold rolling”) the thread roots on every piece of heavy weight drill pipe. Because the threads are in a compressed state to begin with, the endurance limit to bending forces is increased, thereby decreasing fatigue. ? Grant Prideco. All rights reserved. August 2001 H E A V Y W E I G H T D R I L L P I P E 104 ? Grant Prideco. All rights reserved. August 2001 eXtremeTM XDTM-90 Heavy Weight Drill Pipe XD?-90 Heavy Weight Drill Pipe (HWDP) is a proprietary product offered by Grant Prideco for service in H2S environments. XD?-90 HWDP is available in both Standard and Spiral HWDP. XD?-90 HWDP provides higher strength and a tempered martensite microstructure for enhanced resistance to crack initiation and crack propag