Stop Collar is used to hold centralizer or cement baskets on any position of casing, which ensures the positions of centralizer or cement basket to meet the design. The stop collars are available in two types: higned type and slip on type. The stop collars can be installed on any position on casing to limit the axial movement of centralizer and cement baskets.
Usage
1. Fastening screw stop ring when use, first set into the casing, and then using a wrench to tighten the screws.
2. Fixed screw type when use, first set into the casing, and then insert screws, type in with a hammer.
3. Snap fit stop ring, direct stop ring button on the casing, use pin lock, then knocked into the screws.
Hinged Bolted Stop Collars
An economical collar suitable for sub-critical annular tolerances. Available in size range 4 1/2" to 20", it has a cross bolt design which makes it an efficient and user friendly device.
Hinged Spiral Nail Stop Collars
Available in the size range 4 1/2" to 20", this device can be set in both upset and non-upset casing to provide maximum clearance during rotation. It has a groove in the middle into which a spiral nail can be driven for improved grip on the casing. The broader band firmly grips the collar into position around the casing.
Hinged Stop Collar with Set Screw
Available in the size range 4 1/2" to 20", this device has a high cost-utility ratio. This hinged collar with a row of set screws positions easily and firmly around the casing.
Slip on Stop Collars with Set Screws
This slip-on set screw device is recommended for small hole operations.
Available in size range 2-7/8" to 20" and is gripped by a row of screws, this is a heavy duty device.
Specifications,mm |
13 3/8″ |
10 3/4″ |
9 5/8″ |
8 1/8″ |
7 5/8″ |
7″ |
5 1/2″ |
5″ |
4 1/2″ |
| ID,mm |
338 |
272 |
245 |
206 |
193 |
177 |
139 |
126 |
114 |
| OD,mm |
350 |
284 |
257 |
218 |
285 |
189 |
151 |
138 |
126 |
| Holding Force,KN |
40 |
40 |
40 |
30 |
30 |
30 |
30 |
24 |
24 |
| Stop Collar(Snap Ring)Type |
Type |
Size(mm) |
Weight(kg) |
| 13 3/8" |
Fixed Screw |
Φ370x50 |
9 |
| 9 5/8" |
Fixed Screw |
Φ270x50 |
7.3 |
| 7" |
Fixed Screw |
Φ195x40 |
5.1 |
| 5 1/2" |
Fixed Screw |
Φ154x30 |
3.2 |
Single Piece Slip On Set Screw Stop Collar
Features
1.Available in sizes 4-1/2" to 20"
2.It is single piece collar
3.Screws to induce gripping force
4.Used in high axial loads place
5.Easy to install
Advantages
1. Slip on set screw stop collar ring is a one-piece stop collar.
2. The outside ends of these heavy duty stop collar are generally tapered to a degree(single piece develled/double develled) which helps to hold the casing centralizer and avoid the ends to hit the Bows / Vanes when the casing centralizers are placed over them.
3. This kinds of set screw stop collar is recommended for small hole operation.
4. It is used when holding force requirement is very high.
5. The Slip on Set Screw Stop Collar are available in sizes 4-1/2" to 20".
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