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Non Weld Bow Centralizers (S 10) |
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Eneroil's Steefabs Brand Non Weld Bow Centralizers are high quality, developed to exceed API 10 D specifications for use in most demanding conditions. The Non Weld Bow Centralizers combine the highest
Non Weld Centralizer restoring force with the lowest starting force. Premium quality Bows
made of special alloy steel with uniform hardness provide optimum performance. The bows
with extended profile prevent them from hitting against casing collars. The bows are available
in a range to accommodate any well profile. Quality steel and non weld design ensure extra
strong grip while integral hinges folded on the inside are connected by high strength locking
pin for maximum structural robustness. Steelfabs Brand non weld bow centralizers are used to position the
casing in the centre of the wellbore in vertical, deviated as
well as horizontal wells. The non weld bow centralizers reduce
the effect of channeling by improving cement flow. This results
in a more uniform thickness between the casing and the wel
lbore. By reducing the pipe movement before the cement sets
in, the centralizers are able to minimize gas channeling. The
centralizers provide a semi rigid casing standoff.
Non
weld design features self locking of lips forholding bows to
end collars.Bows of special alloy steel are hot formed and tempered for optimum strength,
resilience and uniformity. They are then flattened as per specifications for consistent
performance. High restoring force combined with low starting force is achieved with
all 5 bow heights. Their installation on the casing pipe is very convenient.
It requires only the placement of the two assembled halves on the pipe and iinserting the pin in the end collar hinge. The centralizer when unassembled makes a compact package, greatly reducing shipping cost. Assembly at site is conveniently done, hydraulically or pneumatically.
The non weld bow centralizers are available in sizes 4½" to 24".
|
Centralizer Bow Configuration & Standard Bow Heights |
|
| |
BST 0 |
BST 1 |
BST 2 |
BST 3 |
BST 4 |
in. |
0.965 |
1.161 |
1.437 |
2.303 |
3.051 |
mm |
24.5 |
29.5 |
36.5 |
58.5 |
77.5 |
Non Weld Bow Centralizers (S 10) |
Casing Size |
Bow Type
|
Max. O.D. Size
|
Casing Size |
Bow Type
|
Max. O.D. Size
|
Casing Size |
Bow Type
|
Max. O.D. Size
|
in. |
in. |
mm. |
in. |
in. |
mm. |
in. |
in. |
mm. |
4 ½
|
BST-0 |
6.579 |
167.1 |
7 ⅝
|
BST-0 |
9.760 |
247.9 |
13 ⅜ |
BST-0 |
15.567 |
395.4 |
BST-1 |
6.972 |
177.1 |
BST-1 |
10.154 |
257.9 |
BST-1 |
15.961 |
405.4 |
BST-2 |
7.524 |
191.1 |
BST-2 |
10.705 |
271.9 |
BST-2 |
16.512 |
419.4 |
BST-3 |
9.256 |
235.1 |
BST-3 |
12.437 |
315.9 |
BST-3 |
18.244 |
463.4 |
BST-4 |
10.752 |
273.1 |
BST-4 |
13.933 |
353.9 |
BST-4 |
19.740 |
501.4 |
|
5
|
BST-0 |
7.098 |
180.3 |
8 ⅝ |
BST-0 |
10.756 |
273.2 |
16
|
BST-0 |
18.193 |
462.1 |
BST-1 |
7.492 |
190.3 |
BST-1 |
11.150 |
283.2 |
BST-1 |
18.587 |
472.1 |
BST-2 |
8.043 |
204.3 |
BST-2 |
11.701 |
297.2 |
BST-2 |
19.138 |
486.1 |
BST-3 |
9.776 |
248.3 |
BST-3 |
13.433 |
341.2 |
BST-3 |
20.870 |
530.1 |
BST-4 |
11.272 |
286.3 |
BST-4 |
14.929 |
379.2 |
BST-4 |
22.366 |
568.1 |
5 ½
|
BST-0 |
7.614 |
193.4 |
9 ⅝
|
BST-0 |
11.748 |
298.4 |
18 ⅝
|
BST-0 |
20.854 |
529.7 |
BST-1 |
8.008 |
203.4 |
BST-1 |
12.142 |
308.4 |
BST-1 |
21.248 |
539.7 |
BST-2 |
8.559 |
217.4 |
BST-2 |
12.693 |
322.4 |
BST-2 |
21.799 |
553.7 |
BST-3 |
10.291 |
261.4 |
BST-3 |
14.425 |
366.4 |
BST-3 |
23.531 |
597.7 |
BST-4 |
11.787 |
299.4 |
BST-4 |
15.921 |
404.4 |
BST-4 |
25.028 |
635.7 |
6 ⅝
|
BST-0 |
8.728 |
221.7 |
10 ¾ |
BST-0 |
12.902 |
327.7 |
20 |
BST-0 |
22.248 |
565.7 |
BST-1 |
9.122 |
231.7 |
BST-1 |
13.295 |
337.7 |
BST-1 |
22.642 |
575.1 |
BST-2 |
9.673 |
245.7 |
BST-2 |
13.846 |
351.7 |
BST-2 |
23.193 |
589.1 |
BST-3 |
11.406 |
289.7 |
BST-3 |
15.579 |
395.7 |
BST-3 |
24.925 |
633.1 |
BST-4 |
12.902 |
327.7 |
BST-4 |
17.075 |
433.7 |
BST-4 |
26.421 |
671.1 |
|
7 |
BST-0 |
9.126 |
231.8 |
11 ¾
|
BST-0 |
13.898 |
353.0 |
24 |
BST-0 |
26.298 |
667.9 |
BST-1 |
9.520 |
241.8 |
BST-1 |
14.291 |
363.0 |
BST-1 |
26.692 |
677.9 |
BST-2 |
10.071 |
255.8 |
BST-2 |
14.843 |
377.0 |
BST-2 |
27.243 |
691.9 |
BST-3 |
11.803 |
299.8 |
BST-3 |
16.575 |
421.0 |
BST-3 |
29.015 |
736.9 |
BST-4 |
13.299 |
337.8 |
BST-4 |
18.071 |
459.0 |
BST-4 |
30.511 |
774.9 |
Bow Spring Selection Guide Non Weld Centralizers
|
Casing Size |
Bow Type
|
Preferred Hole Size Combination |
Casing Size |
Bow Type
|
Preferred Hole Size Combination |
Casing Size |
Bow Type
|
Preferred Hole size Combination |
in. |
in. |
in. |
in. |
in. |
in. |
4½
|
BST-0 |
6, 6⅛, 6¼ |
7⅝
|
BST-0 |
--- |
13⅜ |
BST-0 |
--- |
BST-1 |
--- |
BST-1 |
9½ |
BST-1 |
14¾ |
BST-2 |
--- |
BST-2 |
--- |
BST-2 |
--- |
BST-3 |
7⅞, 8½ |
BST-3 |
--- |
BST-3 |
15½, 16 |
BST-4 |
--- |
BST-4 |
--- |
BST-4 |
17½ |
|
5
|
BST-0 |
6¼ |
8⅝
|
BST-0 |
9¾ |
16
|
BST-0 |
--- |
BST-1 |
6¾ |
BST-1 |
--- |
BST-1 |
17½ |
BST-2 |
--- |
BST-2 |
--- |
BST-2 |
18½ |
BST-3 |
8½ |
BST-3 |
12¼ |
BST-3 |
18½ |
BST-4 |
12¼ |
BST-4 |
--- |
BST-4 |
20, 22 |
|
5½
|
BST-0 |
6⅝ |
9⅝ |
BST-0 |
--- |
18⅝
|
BST-0 |
--- |
BST-1 |
--- |
BST-1 |
11⅜ |
BST-1 |
--- |
BST-2 |
7⅞ |
BST-2 |
11⅜ |
BST-2 |
--- |
BST-3 |
8⅜, 3½, 8¾ |
BST-3 |
11¾, 12¼, 12½, 12⅝ |
BST-3 |
22 |
BST-4 |
--- |
BST-4 |
--- |
BST-4 |
24 |
|
6⅝
|
BST-0 |
7⅞ |
10¾ |
BST-0 |
--- |
20
|
BST-0 |
--- |
BST-1 |
8½, 8⅝ |
BST-1 |
12¼ |
BST-1 |
--- |
BST-2 |
8⅝, 8¾ |
BST-2 |
12¼, 12½, 12⅝, 13 ½ |
BST-2 |
--- |
BST-3 |
9⅞ |
BST-3 |
--- |
BST-3 |
--- |
BST-4 |
12¼ |
BST-4 |
14¾ |
BST-4 |
24 |
|
7 |
BST-0 |
8⅜, 8½ |
11¾
|
BST-0 |
--- |
|
BST-1 |
8½, 8⅝, 8¾ |
BST-1 |
--- |
BST-2 |
8½, 8⅝, 8¾ |
BST-2 |
--- |
BST-3 |
9⅞ |
BST-3 |
--- |
BST-4 |
12¼ |
BST-4 |
--- |
PERFORMANCE REQUIREMENT: As per API Specification 10D
Force in lbs
|
|
API
|
|
Casing Size in inches |
Non Weld Centralizer
|
Starting Force (max.) |
Restoring Force (min.) |
4 ½ |
464 |
464 |
5 |
520 |
520 |
5 ½ |
620 |
620 |
6 ⅝ |
960 |
960 |
7 |
1040 |
1040 |
7 ⅝ |
1056 |
1056 |
8 ⅝ |
1440 |
1440 |
9 ⅝ |
1600 |
1600 |
10 ¾ |
2040 |
1020 |
11 ¾ |
2160 |
1080 |
13 ⅜ |
2440 |
1220 |
16 |
2600 |
1300 |
18 ⅝ |
3500 |
1750 |
20 |
3760 |
1880 |
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> Non Weld Bow Centralizers (S 10)
> Non Weld Positive Centralizers (S 20)
> Non Weld Semi-Rigid Bow Centralizers (S 29)
> Non-Weld bow Centralizers with Turbo Fins (S 30) |
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