Puyang Zhongshi Group Co., Ltd.
Puyang Zhongshi Group Co., Ltd.
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Centralizer Stop Collars
a. Mobile Screw-Type Stop Collar: Place the collar over the casing and securely tighten the screws using a wrench.
b. Fixed Screw-Type Stop Collar: Fit the collar around the casing, insert the screws, and gently tap them into position using a hammer.
c. Buckle-Type Stop Collar: Attach the stop collar onto the casing, fasten it with the buckle mechanism, and ensure proper locking with a pin. Subsequently, gently tap the screws into place using a hammer.
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Discover the essential role and notable features of centralizer stop collars, also referred to as position rings, stop circulars, brake rings, and more. These collars serve as a device to limit the slip of centralizers or cement baskets on a casing during the cementing process. Equipped with three types - mobile screw, fixed screw, and buckle - their primary function is to restrict the axial movement of the centralizer or cement basket along the casing.
Step-by-Step Guide to Install and Utilize Centralizer Stop Collars
3. Property Parameters of Centralizer Stop Collars:
| 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 |
Puyang Zhongshi Group Co., Ltd is a professional manufacturer of various oilfield equipments and cementing accessories since 1997, restructured enterprise of SINOPEC. Our group have 10 years export experience and 9 subsidiary factories, more than 500 employees. We are the first-class supplier of resources market of SINOPEC and CNPC.
We have the certificates of API 5CT, API 10D, API 11E, API 6A, API 11AX, ISO 9001 and ISO 14001. Our foreign customers are mainly from America, Central Asia, Russia, Southeast Asia, Middle East, etc.