|
|
| model gfz-f positive centralizer |
|
| |
features
-
used for cased hole.
-
larger flow area than conventional rigid centralizer.
-
non-welded, pressed by punching, high strength.
-
hinged design allows convenient field installation.
-
can be unfolded and stacked flatly, saving storage and transportation cost.
specifications
|
casing size
|
hole size
|
max o.d.
|
|
in.
|
in.
|
mm
|
in.
|
|
4-1/2
|
6
|
146.1
|
5.752
|
|
5
|
6-1/2
|
158.8
|
6.252
|
|
5-1/2
|
8-1/2
|
209.6
|
8.252
|
|
7
|
8-1/2
|
209.6
|
8.252
|
|
7-5/8
|
9-1/2
|
235
|
9.252
|
|
9-5/8
|
12-1/4
|
304.8
|
12.000
|
|
10-3/4
|
12-1/4
|
304.8
|
12.000
|
|
13-3/8
|
16
|
400
|
15.748
|
|
13-3/8
|
17-1/2
|
438
|
17.244
|
|
|
|
