Silex DTS’ raise bore integral pipes and stabilizers are made from two distinct grades of steel alloy. Silex DTS characterized the two type of steel alloy as high strength and superior strength.
High-Strength for Enhanced Durability
High Strength Steel Alloy. Silex DTS’ high strength steel alloy is the original AISI steel. The steel is heat treated to produce a deeper carburized surface, which results in higher ultimate tensile strength and yield strength. Superior Strength Steel Alloy. Machines with greater output and a demand for larger pipes, Silex DTS turn to a superior strength steel alloy. The steel grade steel was more superior for large diameter raise drill pipe. The steel when heated, quenched and tempered through heat treat, delivered the toughness and fatigue strength far superior than other alloy steel.
Diameter Range
Material
Ultimate Tensile Strength Min.
Yield strength Min.
up to 97/8”
high strength
930MPa (135,000PSI)
758MPa (110,000PSI)
above 10”
Superior strength
1035MPa (150,000PSI)
965MPa (140,000PSI)
About DI Thread
Silex DTS offer the DI-22 thread connection, which is specially designed for raise boring application. The thick thread tip makes it able to with stand high pulls. All threads are CNC machined for precision and gauged after manufacturing. The gauges are specially made and certified by the USA Standard Gauge of Inspection.
Quality Inspection
Silex DTS’ quality procedures are beyond the standard industry. Drill pipes are mechanically tested for consistency, strength and durability through the stage of manufacturing and heat treatment process. Raise pipes and stabilizers are inspected through five mechanical testing, which include hardness, notch, tensile, yield, and ultrasonic test.
