We are China manufacturer of high quality grade 55, grade 105 Threaded Rods and threaded bars in astm f1554 standard. Our advantages and more services of threaded steel rods includes:
1) Wide range of diameters from 1/2" - 4"
2) Customized Length from 100mm to 12000mm
3) Good threads at 60 degree
4) Good straightness: 1mm/m max
5) Even hardness on whole bars
5) Proper mechanical properties
7) Full sets of testing equipment: Surface, Dimenstion. Mechanical properties testing
8) Fast delivery time
Grade 55 Threaded Rod,Astm F1554 Grade 105,Astm F1554 Threaded Rods,F1554 Grade 55 Threaded Rod SHANDONG LE REN SPECIAL STEEL CO., LTD. , https://www.js-luggagecarts.com
The drilling rig is a key project of the National 863 Program. It has applied for 7 new items of energy-saving high-power oil drilling winch, oil winch new shifting mechanism, two-half butt-type rope trough winch drum, and rig derrick hydraulic lifting type herringbone. Utility model patents. In addition, the two sides of the invention have applied for two invention patents for the simultaneous cooling of the inner and outer surfaces of the casing of the drilling pump and the casting steel and manufacturing method for the oil rig suspension system. The former is still applying for international patents.
Compared with the 9000-meter rig with 5 patents, the 12,000-meter rig embodies the technical innovation capability of gemstone machinery in terms of overall integration, component design and manufacturing. Some media said that if the 9000-meter rig is known as the "Shenzhou VI" of China's oil industry, then the 12,000-meter rig is the "Chang'e No.1".
Gem Machinery Company's 12,000-meter deep well drilling rig declared 9 patents
The 12,000-meter deep well drilling rig independently developed by Gems Machinery Co., Ltd. has applied for 9 patents recently, setting a record for the most patented technology used in a single drilling rig.