Pressure pulse attenuator
US6325145A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 15, 2000 |
| Grant date | Dec 4, 2001 |
| Priority date | — |
| Expiry date | Jun 15, 2020 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B31/113
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A downhole in-line tubular accumulator for the attenuation of pressure pulses generated by operation of a downhole vibratory apparatus in an oil or gas well. An inner tube is positioned within a hollow housing, with the inner tube being attached to the housing at their upper ends. The lower end of the inner tube is unattached within the housing, thereby establishing an annular upper cavity between the inner tube and the housing, and an open lower cavity in the housing below the unattached lower end of the inner tube. The attenuator is run into the well on a work string. Pressure pulses traveling through the fluid column in the work string are attenuated by entrapped air in the annular upper cavity in the housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.