API 7′′x 8 1/2′′ Welded Pipe Made Casing Centralizer

• Sizes: 4 1/2"-20"
• Sample: Available
• Drawing: Available
• ODM: Available
• Color: Red/Black
• Markings: Available
• Model NO.: 4 1/2"-20"
• OEM: Available
• Height: 200mm
• Transport Package: Wood Cases
• Specification: 4 1/2"-20"
• Trademark: zhongshi
• Origin: Henan
• HS Code: 843143100
• Production Capacity: 10000PCS/Month

Product Description

                 API 7''X 8 1/2'' Welded Pipe Made Casing Centralizer

Centralizers can be installed very conveniently and quickly on the casing pipe by merely wrapping the pre-assembled two halves on the pipe and inserting pins in the collar hinges.
 

Salient Features/Advantages of Spring Bows Centralizers
1.	Quality Steel, unique design, workmanship and rigid inspection ensures its versatile application, easy assembly and quick installation.
2.	Special heat treatment of Spring Bows provides required centering force for casing.
3.	Mets A.P.I. Specification and bears A.P.I. monogram.
4.	Choice of Bow height can meet all Centralizer-Hole size combination with the required starting and restoring force.
5.	The Centralizer provides maximum effective centralizing of casing with minimum obstruction to annular flow.
6.	Less space required for packing & storing.

Spring Bows 
The spring bows, the critical parts of the Centralizer, are made of high quality special steel strips. These are sheared to size and normalised to have the proper grain structure. Bows are forged in four different unique designs to have varied heights. These are then hardened and tempered to ensure optimum mechanical properties to meet or exceed the STARTING AND RESTORING FORCD criteria specified in A.P.I. Standard 10-D. Bows are then flattended several times on a special machine tailor made for the purpose to attain constant height and to get permanent setting.
Spring Bows 







  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

Characteristics:
 
A) Designed for High Restoring Force and Low Starting & Running Force 
B) End collars are designed with self-locking action, which are easy to assemble.
C) Undergo special coating process to prevent from rust. 
D) Can be shipped in half assembled condition for economy in shipping and storage costs. 
E) Specification: 4"---20". Any special sizes or combination can available on request.
There are welded and non-welded type, double bow and single bow available for supplying.
Hinged Non Weld Bow Spring Centralizers are designed for high restoring force combined with low starting force for centralizing the casing pipe in vertical, deviated and horizontal wells. 
Feature
 1)Bows can be configured for any hole dia from choice of five standard bow heights for optimum starting and restoring forces. 
2)Compatibility of the bows with various end collar sizes reduces inventory requirements and provides tremendous flexibility of casing and hole size combinations. 
3)Centralizers undergo a special process of rust prevention before painting .