A drill tool joint
By setting independent grooves and shoulder surfaces at both ends of the drill joint, the stress distribution is optimized, solving the problems of stress concentration and poor sealing performance in the existing technology, and realizing high strength and high efficiency drilling of the joint.
CN122304629APending Publication Date: 2026-06-30CHINA NAT PETROLEUM CORP +1
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA NAT PETROLEUM CORP
- Filing Date
- 2024-12-27
- Publication Date
- 2026-06-30
AI Technical Summary
Technical Problem
While existing drill bit joints improve the strength and torque resistance of threaded connections, they cannot effectively reduce stress concentration, and are difficult to process, have poor sealing performance, and increase manufacturing costs.
Method used
A drill bit joint is designed by setting independent first and second grooves at both ends of the joint, combined with steps and shoulder surfaces to form a V-shaped structure, thereby optimizing stress distribution and enhancing sealing performance.
Benefits of technology
It reduces stress concentration, improves the structural strength and sealing performance of the joint, extends its service life, reduces manufacturing costs, and ensures safe and efficient drilling.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN122304629A_ABST
Abstract
This invention relates to oil drilling tools and proposes a drill joint comprising: a first joint and a second joint, which are threadedly connected. At least one first groove is present at the junction of the head end of the first joint and the tail end of the second joint, adjacent to the threaded connection of the first and second joints. At least one second groove is present at the junction of the tail end of the first joint and the head end of the second joint, also adjacent to the threaded connection of the first and second joints. Due to the presence of the first and second grooves, when the first and second joints are under stress, the first and second grooves can reduce stress concentration at that location, thereby improving the overall structural strength. Furthermore, the first and second grooves are independently distributed, thus avoiding the possibility of multiple first or second grooves connecting into a single groove simply to reduce stress concentration, indirectly improving the structural strength of the drill joint connection to a certain extent.
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