The bow is inset into the end collars to provide maximum annular clearance. Integral set screws in the bottom collar allow for pulling centralizer into the hole without the use of stop collars; however, when this is done, it limits or stops the ability to pull the string from the hole once run. ..These are very popular when running liners.
Single-piece, non-welded centralisers have addressed the
failings of multipart and solid body centralisers with some
designs producing benefits such as zero start force and
zero running force that reduce drag significantly. Reducing
torque ensures that casings can be rotated easily, in both
cased and open holes, at a deeper level than before.
failings of multipart and solid body centralisers with some
designs producing benefits such as zero start force and
zero running force that reduce drag significantly. Reducing
torque ensures that casings can be rotated easily, in both
cased and open holes, at a deeper level than before.
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
|
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