Hinged Non Welded Bow Spring Centralizers

• Certification: ISO 9001:2000, ISO 9001:2008
• Surface Treatment: Spray-Paint
• Centralizer Type: Elastic
• Structure: Automatic Reversing
• Material: Cast Steel
• Type: Centralizer
• Model NO.: 4 1/2"-20"
• Drawing: Available
• Sample: Available
• Spec: 4 1 /2"-20"
• ODM: Available
• Markings: Available
• OEM: Available
• Color: Blue
• Height: 350mm
• Bows: 6PCS
• Standard: API 10d
• Transport Package: Wood Cases
• Specification: 4 1/2"-20"
• Trademark: ZS
• Origin: Henan, China
• HS Code: 843143100
• Production Capacity: 10000PCS/Month

Product Description

                      Hinged Non Welded Bow Spring Centralizers

 

Designed for high restoring force combined with low starting force for centralizing the casing pipe in vertical, deviated and horizontal wells. High performance characteristics are combined with easy field assembly Bow springs are of high quality alloy steel, hot bent to shape using dies and then heat treated under controlled temp / time cycles for consistent spring characteristics. Collars are of widened design for greater frame strength and to prevent bows hitting casing. Integral hinges are designed to wrap to the inside and are with eight sections and seven shear points for minimum disorientation even under severe stress. Hinge locking pins are of high strength steel for maximum structural strength. Bows can be configured for any hole dia from choice of five standard bow heights for optimum starting and restoring forces. Compatibility of the bows with various end collar sizes reduces inventory requirements and provides tremendous flexibility of casing and hole size combinations. Centralizers undergo a special process of rust prevention before painting . These can be shipped in half assembled condition for economy in shipping and storage costs.

Fuction of casing Casing centralizer:
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.

Featrues:
1,Our newest design has features making them ideal for both tubing and casing applications:
2,The non-weld design eliminates any weak spots.
3,Tapered pin hold the bows and hinges in the collars
4,High-quality, super-strengthen spring-steel bows and especialy designed collar hinges provide reliable downhole performance.
5,The whole casing centralizer is made without any rivet and no welding.
6,The whole casing centralizer is composed of 3 parts, the spring, the hinges and tapered pin.
7,Easy for installation and transport
8,Conform to API 10D standard









 
Specifications
 
 

Casing Size	Hole Size	Max O.D.
in.	in.	mm	in.
20	24/26	650/714	25.591/28.110
18-5/8	22/24	590/680	23.228/26.772
16	20/22	550/613	21.654/24.132
14	18	484	19.055
13-3/8	17-1/2	470	18.504
12-3/4	17- 1/2	466	18.346
10-3/4	12-1/4	370	14.567
9-5/8	12-1/4	375	14.764
7-5/8	9-7/8	273	10.748
7	8- 1/2	252	9.921
6-5/8	8- 1/2	245	9.646
5- 1/2	8- 1/2	256	10,079
5	6- 1/2	190	7.480
4-1/2	6	181	7.126