Downhole mechanical percussive hammer drill assembly
US10415314B2 · kind B2 · utility
2Cited by
21References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 8, 2015 |
| Grant date | Sep 17, 2019 |
| Priority date | — |
| Expiry date | Nov 16, 2035 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B6/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A modular, mechanical percussive hammer assembly may be used with drill strings, wireline cable, and coiled tubing. Rotation of a splined driveshaft by downhole electric, hydraulic or mud motor rotates a downwardly-biased hammer and drill body rotatively captured within a upwardly-biased stationary anvil. A bit is carried by the drill body. The hammer contacts and rotates along a cammed control surface of the anvil as the driveshaft is rotated. Interaction between the cammed control surface and the hammer operated to create an axial impact force that is transmitted to the drill body and drill bit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.