A torque adaptive back reaming tool
By designing a reversing mechanism and a triangular gear mechanism, and combining them with high-strength aerospace materials, the problems of low utilization rate of the forward-threaded drill rod and non-adaptive torque output in traditional reverse-threading tools have been solved, thus improving safety and efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CNPC GREATWALL DRILLING COMPANY
- Filing Date
- 2025-01-17
- Publication Date
- 2026-07-17
AI Technical Summary
In existing technologies, the traditional reverse threading method requires the use of reverse threading drill rods, resulting in low utilization rate and high resource costs of forward threading drill rods. Furthermore, the torque output of traditional multi-stage planetary gear transmissions is not adaptive, which can easily lead to deformation and failure of the output shaft.
A reversing mechanism is used to connect the forward-engaged drill rod to the reverse-engaged device, combined with a triangular gear mechanism to achieve adaptive torque variation, and a high-strength aerospace material output shaft is used. A three-stage planetary gear set is designed to reduce speed and increase torque.
It improves the utilization rate of forward-threaded drill pipe, increases the safety and reliability of reverse-threaded operations, reduces resource costs, and improves the success rate and efficiency of operations.
Smart Images
Figure CN122407115A_ABST