What is a Hinged Spiral Nail Stop Collar?
The Hinged Spiral Nail Stop Collar (also called a Hinged Drive Pin Stop Collar), is a common cementing tool using for fixation of the centralizers. It can be latched onto the casing pipe at any position, enabling fast, mid-joint installation. The collar is secured by driving one or more specially designed spiral nails into pre-drilled holes in the collar once it is wrapped around the casing. The force of the hammer drive action causes the pin to deform or lock within the collar and bite into the casing surface, creating a firm mechanical wedge and lock.
Key advantages of Hinged Spiral Nail Stop Collar
The primary advantages of this type are all related to speed, simplicity, and reliability in the field:
- Fastest Installation Time: This is the chief advantage. The “hammer-and-lock” method is significantly faster than tightening multiple set screws with a wrench or torquing bolts, leading to reduced rig time during casing running operations.
- Excellent Holding Force: The hardened drive pins wedge the collar tightly against the casing, providing a strong, reliable, positive mechanical lock that meets or exceeds API specifications for holding force.
- No Specialized Tools Required: Installation typically requires only a hammer, eliminating the need for specific torque wrenches, Allen keys, or socket sets, which simplifies rig floor operations and tool accountability.
- Positive Visual Confirmation: When the pin is fully seated, the operator has a clear visual confirmation that the collar is secured.
Hinged Spiral Nail Stop Collar is suitable for
- Medium to High-Deviation Wells: The strong mechanical lock makes it suitable for resisting high axial drag forces, ensuring centralizers remain in position.
- Rapid Casing Running Operations: Highly favored in environments where the focus is on maximizing the rate of penetration (ROP) of the casing string due to its minimal installation time.
- Standard Casing Grades: As the pin bites into the casing surface, it is best suited for standard carbon steel casing where minor surface penetration is acceptable.
- Standard Centralization: It is an excellent, reliable option for securing all common types of centralizers (bow-spring and solid-body) and cement baskets.
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Hinged Spiral Nail Stop Collar
why choose puyang zhongshi co ltd?
Premier Authority and Most Capable Supplier in Oilfield
Established in 1996 through the SINOPEC Central Plains Oilfield restructure, Puyang Zhongshi Group Co Ltd operates with a registered capital of 130 million RMB and an annual output of 200 million RMB. We employ over 580 staff, including 160+ technical experts.
Our main product is Oil Machinery, supported by over 10 specialized companies (including cementing tools, pumping units, and wellhead systems) and five international trade departments. For cementing tools, we have a robust monthly capacity of 500 sets of float equipment and 30,000 centralizers.
We have built long-term strategic partnerships across major global markets, including USA, Russia, Kazakhstan, Sudan, Indonesia, Iran, and Venezuela.
fully certified by API & ISO
The API (American Petroleum Institute) certifications our company Puyang Zhongshi Group holds are excellent and position us very strongly in the global oil and gas market. They provide an authoritative, third-party validation of our product quality and system reliability.
Having the API Q1 certification immediately places our company Puyang zhongshi group co ltd in the top tier of suppliers. Many smaller manufacturers only hold ISO 9001, but the Q1 certification signals a commitment to the oil and gas industry’s most demanding quality requirements, especially relevant for services and complex equipment.
Supplier of the SLB, Halliburton & Baker Hughes
We are the stable supplier of the International Big Three—Schlumberger, Halliburton, and Baker Hughes. Our established partnership with these global leaders means our products and services are proven to meet the industry’s most rigorous standards. Our clients include many top oil service companies in the world.
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