Polished rod load cell
US11542809B2 · kind B2 · utility
0Cited by
12References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 10, 2020 |
| Grant date | Jan 3, 2023 |
| Priority date | — |
| Expiry date | Oct 23, 2040 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/127
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for measuring strain in a polished rod of a beam pump unit includes a body having an upper wide section, a lower wide section, and a narrow section having a reduced width in comparison to each of the upper and lower wide sections. A bore is formed in the narrow section. The apparatus also includes at least two connectors configured to connect the body to the rod. The bore is positioned between the two connectors in a direction that is parallel to an axis of the rod. The apparatus further includes a strain gauge positioned in the bore, so as to measure strain in the rod between the two points of connection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.