S135 Drill Pipe

　　Size : 2 3/8', 2 7/8',3 1/2',4',4-1/2' ,5'1/2'

　　Grade : E75, X95, G105, S135

　　Place of origin :  China

　　API 5D Drill Pipe

　　Grade: E75, X95, G105, S135

　　Operative Standard: API SPEC 5D,API SP

　　Integral heavy weight  Drill Pipe

　　The drill collars are made of modified AISI 4145H chromium molybdenum alloy steel. These drill collar bars are full-length heat treated and water quenched to obtain ASTM A-370 mechanical properties. Full mechanical and chemical mill test certifications are supplied with all drill collars. These mill test certifications guarantee a hardness range of 285 to 341 BHN and an impact value of 40 ft.-lbs. at room temperature one inch below the surface.

　　1. Usage : One of the most important components of the drill string is to provide drilling bit ofpressure and the drill string rigid role.

　　2. Standard : API 7, API 7-1 and SY/T standards.

　　3. Material : AISI 4145 H .

　　4. Types:drill pipes anddrill collars

　　5. Brand:Shengtian