Drill rod having internally projecting portions
US9932775B2 · kind B2 · utility
2Cited by
6References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 17, 2015 |
| Grant date | Apr 3, 2018 |
| Priority date | — |
| Expiry date | Jul 17, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L9/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A threaded drill string component having a hollow elongate body with a box end portion, an opposing pin end portion and a cylindrical mid-body portion that extends longitudinally between the respective box and pin end portions and has a variable wall diameter. The mid-body inner wall of the mid-body portion has at least one projecting portion or upset that is spaced from both the box and pin end portions and extends inwardly toward a central longitudinal axis of the hollow body and a plurality of troughs defined in the mid-body inner wall of the mid-body portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.