API 5DP Drill Pipe Oil Drilling Pipe made in china Shengtian

　　Specifications

　　1.Non-Standards

　　2.OD:79.4mm-279.4mm

　　3.Certifactes: ISO ,API 7-1

　　4.Moq: 2tons

　　5.Spiral Drill Collar DC

　　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 Size : OD : 3 1/8”---11”, Length : 10’---31’

　　6.Brand:Shengtian