Drilling speed improvement device capable of producing both hydraulic pulse and impact vibration
US10718176B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 2019 |
| Grant date | Jul 21, 2020 |
| Priority date | — |
| Expiry date | Nov 14, 2039 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention discloses a drilling speed improvement device capable of producing both hydraulic pulse and impact vibration. The device has a pressure transfer rod that is arranged at an upper end of a lower joint. A spring chamber is formed among a drill body, the pressure transfer rod and the lower joint. A spring is arranged in the spring chamber. A communicating hole is formed in the drill body. A piston is arranged at an upper end of the pressure transfer rod. A pressure bearing head is arranged at an upper end of the piston. A pressure bearing base is arranged on the inner side of an upper joint. Drill bit impact loads and drilling fluid pulse jets are modulated by the longitudinal vibration energy of a drill stem, the rock breaking efficiency of a drill bit is improved by both dynamic and static loads, and harm caused by vibration of the drill stem is reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.