API Hinged Welded Bow Spring Centralizer

• Certification: ISO 9001:2000, ISO 9001:2008
• Surface Treatment: Spray-Paint
• Centralizer Type: Elastic
• Structure: Slider
• Material: Cast Steel
• Type: Centralizer
• Model NO.: 3 1/2"-20"
• Sample: Available
• Drawing: Available
• Size: 3 1/2"-20"
• Color: Red/Orange/Black/Blue
• Markings: Available
• ODM: Acceptable
• OEM: Available
• Height: 350mm
• Bows: 6PCS
• Transport Package: Wood Cases
• Specification: 3 1/2"-20"
• Trademark: ZS
• Origin: China
• HS Code: 843143100
• Production Capacity: 10000PCS/Month

Product Description

                                                    Hinged Welded Bow Spring Centralizer

 
Hinged Welded Bow Spring Centralizer are high quality welded products, which meet or exceed API 10D specification.
Welded Centralizer has more Restoring Force as compare to Non Welded Centralizer. The Centralizers have Bow Spring strongly welded to the End Collar under required temperature and condition with extra low Hydrogen coated Electrodes.
Integral hinge folded on the inside stay intact even under extreme stress. The End Collars are designed with a Reinforcing Rib stamped into the End Collar to give maximum structural toughness. These generally shipped in half assembled condition for economy in shipping and storage cost.

These Hinged welded bow spring Centralizer are available with combination of Bows configure from choice of seven standard Bow height for optimum Starting and Restoring Force. These Hinged welded bow spring centralizer undergo a special Iron Phosphate coating process to prevent from Rust then coated with special Polyester Powder. These are available in all sizes ranging from 3 1/2″ to 20 ".













Function:

 
1. Take casing to designed position by reducing sticking while casing going down.
2. Centralize casing in well.
3. Balance liquid pressure in annular space by reducing adhesion phenomenon.
4. Improving replacing ratio of mud and boosting cementing quality by reducing channeling effect.
5. Reset force of double-bow casing centralizer is higher than single-bow casing centralizer's, and centralization performance is stronger



 
Technical Parameter:

Specification	In-Dia(mm)	Wall Thickness (mm)	Height(mm)	Total height(mm)	Largest Dia(mm)	Spring Number
5-1/2"*8-1/2"	142-148	3-5	55	650	225	5
7"*9-5/8"	181-186	3-5	55	650	255	6
7"*8-1/2"	181-186	3-5	55	650	235	6
8-5/8"*12-1/4"	223-228	3-5	55	650	330	8
9-5/8"*12-1/4"	250-255	3-5	55	650	330	8
10-3/4"*12-1/4"	274-276	3-5	55	650	330	9
13-3/8"*17-1/2"	342-347	3-5	55	650	450	11
18-5/8"*24	476	3-5	55	600	610	12
20"*26	510	3-5	55	600	660	12

Casing centralizer is one of the necessary conventional casing accessories, upon well operations completion, the rational use of casing centralizer can play the role of:

     Reducing lower casing resistance phenomenon, making the casing smoothly down to the design position;

     Making casing centralizer centered within the well;

     Reducing the sticking phenomenon to make the annular space hydrostatic pressure balanced;

     Reduce channeling, improve the mud replacement efficiency, thus improve the cementing quality.