Drill collars working procedure Conform to the requirment of API Spec 7;Non-API standard type of drill collars are also available.Also,it is in good quality and high standard.
- Standard: ASTM, API, ASTM A523-1996
- Grade: Cr-Mo alloy, 35CrMo4
- Thickness: 12 inch
- Section Shape: Square
- Place of Origin: Heilongjiang, China (Mainland)
- Brand Name: TIANHE
- upply Ability: 20000 Piece/Pieces per Year
- Payment Terms: L/C,T/T
Packge and Delivery
Packaging Details: international standard
Delivery Detail: 30 days
01 Design & working procedure Conform to the requirment of API Spec 7
02 Non-API standard type of drill collars are also available as per client'request
03 Cold-rolled thread roots
04 Thread connections are performed with stress relief grooves
05 phosphated threads applied
Tianhe Oil Group is an integrated corporation engaged in petroleum equipment design, manufacture, sale, rental, and maintenance, oil engineering services and oilfield exploration and development.
Tianhe Oil Group has 5 business scopes throughout 50 countries and regions as follows:
2、Rigs and Offshore Services
3、Oilfield Engineering Services
4、Oilfield Exploration and Development
5、Processing Trade with Provided Materials
Through continuous innovation for years, we not only set up a new modernized enterprise management system but also have an outstanding management group.Our enterprise has been the member of Council of China National Petroleum and Petroleum & Chemical Equipment Association and Class-1 Network Supplier, member of Council of China National Petroleum & Gas Group; member of Material Market of China Petroleum & Chemical Group; manufacturer assigned separately by China National offshore Oil Corporation; High Technology Enterprise of Heilongjiang Province; and excellent enterprise of "the Tenth Five-Year Plan" Manufacture Informationization Project of Heilongjiang Province. Our company obtained ISO9001-2000 approval and certificates of authority to use the API monogram of American Petroleum Institute. We have a land of 150,000 square meters and more than 470 employees, including 17 senior engineers, 57 assistant engineers and all kinds of technologists. We also have 323 sets of production equipment and 27 sets of test equipment.Our main products are drill collars, spiral drill collars, heavy drill pipes, spiral heavy drill pipes, all kinds of drill tools, work-over tools, cementing tools, coring tools, fishing tools and accessory parts, hydraulic service units, hydraulic jar testers, spiral drill tool testers and BOP cleaning systems. They have been extended to 120 kinds and 1000 kinds of specifications. Furthermore, 3 national patents are obtained.Adhering to the principle of development in science and technology, we have established good cooperation relationships with more than 10 research institutes and famous companies at home and abroad. All our products have been well exported to the USA, Canada, Russia, India, the Middle East, North Africa and Ukraine.In the future, we will keep enhancing comprehensive capability and do our utmost to develop oil and gas industry in the world by providing super products and fist class services.