Method and apparatus for measuring pumping rod position and other aspects of a pumping system by use of an accelerometer
US5406482A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1991 |
| Grant date | Apr 11, 1995 |
| Priority date | — |
| Expiry date | Dec 17, 2011 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An oil well pumping unit has a walking beam which raises and lowers a rod connected to a downhole pump. To perform well analysis, it is desirable to know the position of the rod during the stroke. An accelerometer is mounted on the pumping system unit to move in conjunction with the rod. An output signal from the accelerometer is digitized and provided to a portable computer. The computer processes the digitized accelerometer signal to integrate it to first produce a velocity data set and second produce a position data set. Operations are carried out to modify the signal and produce a position trace with stroke markers to indicate positions of the rod during its cyclical operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.