Tubing string extension
US4444253A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 1982 |
| Grant date | Apr 24, 1984 |
| Priority date | — |
| Expiry date | Jun 21, 2002 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/38
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus adapted for use with a pump equipped tubing string disposed within a casing for use in conjunction with an oil well comprising: a tubing string extension having an upper end, a lower end and an opening extending therethrough intersecting the upper and the lower ends thereof, the upper end being connected to the depending end of the tubing string, the tubing string extension having a reduced diameter portion intermediate the upper and the lower ends thereof, at least two nozzle openings formed through the reduced diameter portion of the tubing string extension, each nozzle opening having one end intersecting the outer peripheral surface of the tubing string extension and an opposite end portion intersecting the opening extending through the reduced diameter portion of the tubing string extension, the fluid passing from the reduced diameter portion of the tubing string extension resulting in a pressure reduction causing fluid to be drawn through the nozzle openings in the tubing string extension and into and through the opening in the tubing string extension; an upper and a lower seal assembly, each seal assembly surrounding the tubing string extension, the upper and the…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.