Characteristic:

1. Welded bow spring centralizer with hinged pin design is available and widely applied in the well and easily installed over stop collars or couplings on all standard casing grades.
2. The bow spring centralize can improve the cement flow in the shortest time.
3. Various height of welded bow spring centralizer can be available to offer excellent restoring forces.
4. This bow centralizer increases the holding force by adding evenly spaced integral set screws to assist the welded straight bow springs, a stop collar or coupling is not required with this centralizer.
5. The bow of welded bow centralizer is made of high grade spring steel which is heat treated,can provide maximum standoff during cemention and any bow height is available to provide excellent restoring forces.
6. The rigid end collar is hinged type,it provide solid support for end bands,it is aslo easy installation.
7. All the welded bow spring centralizers are tested and meet or exceed API specification 10D for reliability and durability during operations.

Puyang Zhongshi Group Co., Ltd., restructured from SINOPEC in 1997 has 20 years experience on manufacturing petroleum machinery products . The company registered capital is 10 million U.S. dollars, with annual export 30 million U.S. Dollars.

We have competitive price of our main products like: subsurface sucker rod pump, pumping unit, cementing tools, wellhead (Christmas Tree), etc, with certificates of API11AX,API11E,API6A,API5CT,ISO14001 and ISO9001 approved. We have 9 factories, 580 employees, including more than 160 technicians and engineers.

With 20 years manufacturing experience and more than 10 years exporting experience, our main clients include all oilfields in China such as: Zhongyuan, Daqing, Shengli, Changqing, Nanyang, Karamay, etc and we have exported to more than 30 countries abroad such as: Indonesia, Thailand, Myanmar, Russia, Kazakhstan, Venezuela, Peru, Columbia, Canada, America, Sudan, Egypt, Iran, Australia etc.

We would like to cooperate with friends from all over the world with high quality products and service to achieve mutual development .