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Home » Products » Downhole Tools » Centralizer

Centralizer

HS :8431431000
Name:Bow Spring Centralizer/Integral Centralizer

Features:
Our rigid centralizer is casting-made. The crew type rigid casing centralizer has obvious advantages over the spring centralizer in its simple structure, reliability, high strength and convenient use on site. It is widely used in casing in vertical or highly-deviated well. The rigid screw-type centralizer is a must for casing spiral in the cementing in vertical wall. It is also necessary for casing rotating in cement isolation in the deviated or horizontal well where the spring centralizer is not strong enough for heavy casing. With four or six contacts, centralizers with different sizes and specifications are available for wellbores of different sizes. The centralizer can rotate and slip freely on the sleeve or be fixed by locator or anchor screw. It also helps remove the mud on the sleeve and make the well wall clear when the casing is put into the well. The rotational flow produced by the centralizer during cementing can increase volumetric sweep efficiency. Working as a tray upholding the casing in the centre makes it important for well cementation.

Installation Instruction:
The casing centralizer should be mounted on the interval that is in accordance with the design requirement. The outer diameter of the centralizer should be based on the size of wallbore.
1. It can be installed directly on the casing
2. It moves freely between couplings
3. It can be installed by hinge on any position on the sleeve.

Specification
Rigid casing centralizer specification
Specification Models Max. outer diameter (㎜) Inner diameter ( ㎜ ) Length (㎜)
41/2in×6in I , II , III 145 116.5 200
5in×6in I , II , III 145 129 200
5 1/2in×8 1/2in I , II , III 205-210 142 200/300
6 5/8in×8 1/2in I , II , III 205-210 171 200/300
7in×8 1/2 in I , II , III 205-210 181 200/300
7in×9 1/2in I , II , III 225-235 181 200/300
7in×9 5/8in I , II , III 225-235 181 200/300
9 5/8in×12 1/4in I , II , III 300-305 248 200
13 3/8in×17 1/2in I , II , III 430-435 346 200
Spring Casing Centralizer Specification
Specification Models Max. outer diameter (㎜) Inner diameter ( ㎜ ) Length (㎜)
41/2"×6" 4 160 116 450/575
4 1/2"×6 1/4" 4 167 116 450/575
4 1/2"×7 7/8" 4 210 116 450/575
4 1/2"×8 1/2" 4 230 116 450/575
5"×6" 4 160 128 450/540
5"×6 3/4" 4 180 128 450/575
5"×7 7/8" 4 210 128 450/575
5 1/2"×7 7/8" 5 210 140 450/575
5 1/2"×8 1/2" 5 216/245 140 450/575
5 1/2"×8 3/4" 5 222/250 140 450/575
5 1/2"×9 7/8" 5 251/264 140 450/575
51/2"×91/2" 5 242/264 140 450/575
7"×8 1/2" 6 216/230 179 450/575
7"×8 3/4" 6 222/233 179 450/575
7"×9 1/2" 6 242/264 179 450/575
7"×9 7/8" 6 251/264 179 550/650
9 5/8"×12 1/4" 8 346 245 550/650
9 5/8"×13 3/8" 8 346/352 245 550/650
9 5/8"×12 13/16" 8 378 245 550/650
10 3/4"×15 1/2" 9 405 275 550/650
φ273.05×φ374 9 374 275 550/650
13 3/8"×17 1/2" 10 440/446 342 550/650
13 5/8"×17 1/2" 11 440/466 342 550/650
20"×26" 17 696 510 550/610/650
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