What is a Hinged Set Screw Stop Collar?
A Hinged Set Screw Stop Collar is a metallic ring composed of two halves joined by a hinge.
The two-piece, hinged design allows the collar to be opened and latched onto the casing pipe at any point along its length. This means installation is quick and does not require slipping the collar over the end of the casing joint. Once the collar is latched around the casing, it is secured by tightening one or more set screws (typically using an Allen wrench). The sharpened tip of the set screw penetrates the pipe’s outer surface, creating a positive mechanical lock or “bite” into the casing material.
Key advantages of Hinged Set Screw Stop Collar
High Positive Holding Force: The set screw mechanism provides a direct, high-strength mechanical lock. By biting into the casing surface, it generates a superior axial holding force compared to friction-only collars (like pure Slip-On types), making it highly reliable under high axial loads.
Quick and Flexible Installation: The latch-on (hinged) design is highly efficient on the rig floor. It allows the operator to install the collar anywhere on the casing (including mid-joint, between centralizers, or over minor imperfections) without having to manipulate the collar over the entire length of the pipe.
Cost-Effectiveness: It is generally a cost-effective choice that provides a high level of performance suitable for most standard drilling applications.
Hinged Set Screw Stop Collar is suitable for
Deviated and Horizontal Wells: The high holding force is essential for resisting the significant drag and running forces encountered when running heavy casing strings in non-vertical well sections.
Standard Casing Grades: Ideal for use with carbon steel casing where the minor surface damage (scoring) caused by the set screws is not a critical metallurgical concern regarding corrosion or structural failure.
Rapid Installation Scenarios: Any situation where minimizing rig time is a priority, as the hinged design makes placement very fast compared to slip-on types.
Securing Most Accessories: It is the standard choice for securing all types of casing centralizers (bow-spring and solid-body) and cement baskets.
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Hinged Set Screw 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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