Well drilling acceleration tool
US11920437B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 11, 2020 |
| Grant date | Mar 5, 2024 |
| Priority date | — |
| Expiry date | Nov 9, 2040 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B4/16
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A speed-enhancing drilling tool includes an upstream drill string (10), which has a drive motor and a first driving rod coupled therewith, a downstream drilling bit; and a percussive device connected between the upstream drilling string and the downstream drilling bit. The first driving rod extending axially and the drive motor are configured to drive the first driving rod in rotation. The percussive device has a rotary driving part having an upper end engaged with the first driving rod to rotate together therewith; and a rotary working part having an upper end engaged with a lower end of the rotary driving part and a lower end connected with the downstream drilling bit. The rotary working part can be driven by the rotary driving part to rotate about its axis, and axially movable relative thereto; and a percussion generating part arranged around the rotary working part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.