Founded in 1997,Puyang Zhongshi Group as certified API 10D casing centralizers manufacturer in China,specializes in design and manufacturing of bow spring centralizers,solid rigid centralizers and stop collars at competitive price.
We have 9 factories, more than 500 employees, competitive prices of our casing accessories like bow spring centralizer, solid rigid centralizer,float equipment, cementing plug etc.
We have certificates of API 5CT,6A,10D,11AX,11E, ISO 14001 and 9001.
With 10 years exporting experience,we have exported to more than 30 countries, be praised by all the customers.
1.Bow spring centralizers have welded and non-welded type, is to help center the casing in the wellbore and allows uniform cement flow around the casing to help protect it at all points. Designed with high restoring force and low starting&running force.
2.End collars are designed with self-locking action, which are easy to assemble.
3.Size from 4 1/2'' to 20'', any special sizes or combination can available on request.
4.Including turbulence generating designs that help clean the annulus and distribute the cement more evenly.
5.All models offer ample clearance for fluid passage, even in highly deviated holes and improve cement flow by reducing the effects of channeling.
6.At the same time,our spring bow of single piece centralizer can bear pressure repeatly.We use two kinds of coating technology,one is powder baking,other is paint baking,thes two is completed by high temperature,what we do is to make the centralizer beautiful from appearance and then have dust-free function.
7.Our single piece centralizer sizes are available from 4-1/2in to 20inch,any special sizes can meet your requirement according to casing and well hole size.
| Bow Spring Casing centralizer |
| Model(in) |
Hooping In-Dia.(mm) |
Hooping height(mm) |
Length(mm) |
Max. Out-Dia.(mm) |
Bow type |
Bow Spring Pieces |
| 5-1/2*8-1/2 |
142-148 |
90-120 |
650±50 |
225±5 |
Singer and Double |
5 |
| 7*9-5/8 |
181-186 |
90-120 |
650±50 |
255±5 |
Singer and Double |
6 |
| 7*8-1/2 |
181-186 |
90-120 |
650±50 |
235±5 |
Singer and Double |
6 |
| 8-5/8*12-1/4 |
223-228 |
90-120 |
650±50 |
330±5 |
Singer and Double |
8 |
| 9-5/8*12-1/4 |
250-255 |
90-120 |
650±50 |
330±5 |
Singer and Double |
8 |
| 10-3/4*12-1/4 |
274-276 |
90-120 |
650±50 |
330±5 |
Singer and Double |
9 |
| 13-3/8*17-1/2 |
342-347 |
90-120 |
650±50 |
450±5 |
Singer and Double |
11 |
| 18-5/8*24 |
476±1 |
90-120 |
600±50 |
610±5 |
Singer and Double |
12 |
| 20*26 |
510±1 |
90-120 |
600±50 |
660±5 |
Singer and Double |
12 |
Audited Supplier 
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