Multifunctional directional wireline core drilling device
US11255149B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2020 |
| Grant date | Feb 22, 2022 |
| Priority date | — |
| Expiry date | Dec 10, 2040 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/022
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A multifunctional directional wireline core drilling device includes an outer assembly, an inner assembly, a core unjamming mechanism, and a directional coring mechanism. According to the present disclosure, wireline core drilling can be fulfilled; in addition, the directional coring mechanism can truly restore the strike and azimuth of a stratum facture by obtaining a core with an azimuth. By controlling the flow of drilling fluid during drilling, the core unjamming mechanism can effectively reduce core abrasion, generated due to jamming in the core barrel, during drilling, so that the core recovery of a fractured stratum prone to causing core jamming and the drilling efficiency are greatly improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.