Stop Collar Cementing Tools downhole tools cross over subs oilfield fishing tools

Specifications
1. API standard.
2. ISO certificate.
3. Registered with Sinopec.
4. Technical service.
5. Professional service for export.
Description:
1. Hold centralizers or cement baskets on any position of casing, which ensures the positions of centralizers or cement basket to meet the design.
2. The stop collars are available in three types: Knock-On Type, Spiral Nail Type and Set Screw Type.
3. The stop collars can be installed on any position on casing to limit the axial movement of centralizers and cement baskets