Tianjin Dalipu Oil Country Tubular Goods Co., Ltd
fox tube,rectangular steel pipe,pipe fittings,stainless steel elbow,stainless steel flange, Manufacturer and Supplier - China(CN)
Information for Buyers
Sub X-over VAM TOP(interchangeble) And NEW VAM(interchangeble) Crossover
Surface treatment Black painting, black varnish, transparent oil, hot galvanized, 3PE, epoxy coating,BE,PE.etc.
Seamless & welded
cold drawn /cold rolling /honing
1.hydraulic cylinder /pneumatic cylinder
2. Low and middle pressure fluid transportation pipeline
5. Petroleunm and natural gas industry
3.Certifactes: ISO ,API 7-1
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’
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