API Single Piece Bow Spring Centralizers with Set Screws

• Customization: Available
• Certification: ISO 9001:2000, ISO 9001:2008, API 10d
• Surface Treatment: Sand Blast
• Model NO.: 4 1/2′′*6′′
• Centralizer Type: Elastic
• Structure: Slider
• Material: Cast Steel
• Type: Centralizer
• Sample: Available
• Color: Red
• OEM: Available
• Height: 305mm
• Standard: API 10d
• Markings: Available
• Drawings: Available
• Bows: 6PCS
• Transport Package: Wood Cases
• Specification: 4 1/2"-20"
• Trademark: zhongshi
• Origin: China
• HS Code: 843143100
• Production Capacity: 10000PCS/Month

Product Description

               API 10D Single Piece Bow Spring Centralizer with Set Screws 


The elastic casing centralizer of our company uses heavy-duty springs to support the casing, which keeps the casing in the center for improved the centralizing performance.

Main features
Pressed by the mold, without welding and rivets, so the centralizer has a solid structure;
The centralizer has a trivalvular structure, which makes it easy for shipping;
The starting force and the reset force are both in accordance with the API standards;
Convenient Installation;
The displacement efficiency is improved more effectively with a spinning disk.





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

Function of casing flexible 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.


Bow spring centralizer
1. These Centralizers are designed for High Restoring Force and Low Starting Force for centralizing the casing pipe in a Vertical, Horizontal and Deviated well
2. Premium quality Bows are made of special alloy steel and hot formed in totally controlled heat treatment plant to achieve the uniform hardness all over

3. Spec and performance index of bow spring casing centralizer meet API Spec 10D. The woven centralizer is connected by pin when in use, the unfolded centralizer can be stacked flatly for convenient storage and transportation.


This integral one-piece bow spring centralizer is a high-end centralization product. The 
centralizers are built to gauge to offer easier, RIH, maximize standoff, and maximize the cement job. The UROS range of centralizers are built mostly for passing through close tolerance situations and then opening back up into under reamed holed sections, or washed out  sections, while still providing quality stand-off  performance. Bow spring sections are based on a straight bladed principle, but are curved in both axial and tangential directions. This cross curvature conforms to the borehole wall, while the axial curvature changes proportionally as it encounters different loads. As the loads increase, the surface contact area also increases, reducing the load per square unit of area. This helps avoid compression and shear failure of the formation surface.


Casing Centralizer Specification:

No.	Type	Inside diameter (mm)	Height (mm)	Total height (mm)	Largest diameter (mm)
1	5"*12-1/4"	128-131	105	690	330
2	5"*20"	128-131	105	720	535
3	5-1/2"*7"	142-148	55	650	215
4	5-1/2"*8-1/2"	142-148	55	650	225
5	6"*8-1/2"	156-158	55	650	235
6	7"*8-1/2"	181-186	55	650	235
7	7"*9-5/8"	181-186	55	650	255
8	7-5/8"*9-5/8"	197-201	55	650	275
9	9-5/8"*12-1/4"	250-255	55	650	330
10	13-3/8"*17-1/2"	342-347	55	650	450
11	5-1/2"*8-1/2"	142-148	110	650	225
12	7"*9-5/8"	181-186	110	650	255
13	7"*8-1/2"	181-186	110	650	235
14	5"*6-1/2"	128-131	110	650	175
15	7-5/8"*9-1/2"	196-200	110	650	250
16	10-3/4"*12-1/4"	274-276	110	650	330
17	5"*6-1/4"	130-132	110	650	170
18	9-5/8"*12-1/4"	250-255	110	650	330
19	13-3/8"*17-1/2"	342-347	110	650	450
20	5-1/2"*8-1/2"	142-148	55	650	225