Drilling device at extracting opening for extraction of coalbed methane
US11203925B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Jan 10, 2020 |
| Grant date | Dec 21, 2021 |
| Priority date | — |
| Expiry date | Feb 15, 2040 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B3/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
In the present disclosure, by providing a rotary torque sensor and an auxiliary drive mechanism, the drilling drive can be well controlled according to the required torque. For example, when encountering rock formations, the auxiliary drive mechanism can be used for simultaneous driving drilling, and when drilling in soft formations, only by disconnecting the transmission can the operation be completed, so as to effectively reduce energy consumption and improve utilization. In the present disclosure, when a rotary torque is greater than a set value, the controller controls the auxiliary drive mechanism to transmit to the main drive column and drive the main drive column, and when the rotary torque is smaller than or equal to the set value, the controller controls the power transmission between the auxiliary drive mechanism and the main drive column to be disconnected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.