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   Casing Centralizers include Rigid Centralizers, RCR( Rigid Centralizers with Rollers) and Bow type Centralizers.
   Rigid Centralizer makes the casing centralized in wellbore and improves cementing quality.
Features:
1.  Spiral blades increase annular turbulence.
2.  With the shape of stream-lined, it enables casing run easily in well bore.
3.  Both straight blade and spiral blade are available.
4.  The material can be cast steel or cast aluminium.
  

Technical Specification:

Specification, mm

114.3

127

139.7

177.8

244.5

 

Casing O.D., mm

151

151

210
212
215

210
212
215

314

   The bow springs of this centralizer have two types as follow:  non-welded single bow spring centralizer and  non-welded double bow spring centralizer. The centralizer are attached to the end rings without welding. The bow spring casing centralizer bow end is connected to the end rings with a locking tab that bears the load force on the centralizer. The centralizers are supplied in hinged segments joined by hinge pins in each segment. All non-welded centralizers meet or exceed the requirements of API Specification 10D, which dictates the minimum restoring and maximum starting forces for centralizers for various casing/hole size combinations.

Technical specification:

Type

Casing Size
(mm/inch)

Minimum Hole
(mm/inch)

I.D.
(mm/inch)

O.D.
(mm/inch)

OAL
(mm/inch)

RCR5

139.7(5-1/2)

215.9(8-1/2)

143(5-5/8)

211(8-5/16)

260(10-1/4)

RCR7

177.8(7)

215.9(8-1/2)

181(7-1/8)

213.4(8-13/32)

260(10-1/4)

RCR9

244. (9-5/8)5

311.15(12-1/4)

247.5(9-11/16)

305.4(12-1/64)

260(10-1/4)

RCR13A

339.7(13-3/8)

406.4(16)

344(13-35/64)

402(15-53/64)

260(10-1/4)

 
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