FAQs

• What's the material of casing centralizers?

  The main materials of casing centralizers including solid and bow spring centralizers are cast steels, cast aluminum and even composite materials. But the aluminum alloy and zinc alloy will gall and become sticky at high speed and elevated temperature. The composite material is nylon and fiber glass composite material whose features high temperature and wear resistant.

• Why the spiral vane is often used instead of straight vanes?

  Straight vane only provides standoff performance while the spiral vanes can supply the maximum fluid swirl and can remove the maximum mud from around the casing in any hole.

• Why use set screws on rigid centralizers?

  There may be designed with set screws on rigid centralizers, because the set screws can help to get much more holding force. It will have 5000 pounds of axial load without sliding on casing according to test.

• What types of float shoes and collars you can supply?

  We can supply single or double valves float shoes and collars in stab-in types, butt welded types as well as auto-fill types. You can find more types on our Floating Shoes and Collars .

• How to guarantee the quality of cementing tools?

  All our production are accord with API standard, including API 10D, API 10F and API 5CT standard. And we have strict quality control before, during and after production.

• The vane of rigid centralizer is welded or integrated with rigid centralizers?

  It varies. Most of our rigid centralizers are manufactured by mold and casting process, it is better to save processing time and reduce the blowhole quantity on centralizer construction. We can also produce the welded vanes of rigid centralizers as customers' request.

• Can the bow spring and rigid centralizers be coated with colors?

  Yes. Powder coating and painting are the popular and widely used surface treatment for both bow spring and solid rigid centralizers, it can improve the corrosion and rust resistance performance. Besides, they can provide the extremely low friction again in open hole and rough casing pipes. We can customize the colors as customers request.