Sucker rod elevator

By designing a lifting clamp suitable for both coupling-equipped and coupling-less sucker rods, and employing a thrust rod assembly, drive assembly, and buffer design, the compatibility and safety issues of existing lifting clamps have been resolved, achieving stable gripping and reduced maintenance costs.

CN121047503AActive Publication Date: 2025-12-02DEEPSEA INTELLIGENT EQUIP (QINGDAO) CO LTD
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Patent Information

Application Number
CN202511251276.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-09-03
Publication Date
2025-12-02
Estimated Expiration
2045-09-03

AI Technical Summary

Technical Problem

Existing sucker rod clamps cannot adapt to both clamped and non-clamped configurations, resulting in unstable clamping, a risk of slippage, and a lack of precise automatic sensing and feedback, leading to poor operational safety and continuity.

Method used

A sucker rod clamp was designed, which uses a thrust rod assembly, a drive assembly, a claw assembly, and a trigger assembly. Through mechanical linkage, it can stably grip and release sucker rods of two different shapes. Combined with a buffer design, it avoids damage from rigid connection, and uses a hydraulic system to ensure clamping stability and safety.

Benefits of technology

It enables universal gripping of sucker rods with and without couplings, reducing the risk of slippage, minimizing manual intervention, improving operational safety and equipment lifespan, and lowering maintenance costs.

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Abstract

The invention relates to the technical field of oil field machinery, in particular to a sucker rod elevator. Comprising an outer cylinder and an inner cylinder, and the inner cylinder is sleeved with the outer cylinder; the thrust rod assembly comprises a thrust rod, a thrust baffle arranged at the end of the thrust rod and a thrust ejector pin. The clamping jaw driving assembly comprises a jaw seat device, a clamping jaw, a clamping jaw shell and a clamping jaw limiter, the jaw seat device is connected with the thrust cylinder, the clamping jaw is arranged on the jaw seat device, the clamping jaw shell is fixed to the inner side of the inner cylinder, the clamping jaw limiter is fixed in the clamping jaw shell and forms a limiting groove, and the clamping jaw can move along the track of the limiting groove so as to grab or release the sucker rod; a thrust baffle and a thrust ejector pin of the thrust rod assembly are matched with the sucker rod with a coupling and the sucker rod without the coupling respectively, universal grabbing can be achieved without replacing parts, operation steps are reduced, and the slipping risk is reduced. The combined structure of the outer cylinder and the inner cylinder is matched with the subsequent buffer design, so that sucker rod damage caused by rigid butt joint is avoided, and operation continuity is guaranteed.
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