Wellbore wash nozzle system
US6189618A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 1998 |
| Grant date | Feb 20, 2001 |
| Priority date | — |
| Expiry date | Apr 20, 2018 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/08
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A wash nozzle for wellbore washing operations has been invented, the wash nozzle, in one aspect having a central mandrel with a top, a bottom, and a fluid flow bore therethrough from top to bottom, at least one mandrel port through the central mandrel for fluid flow from within the central mandrel's fluid flow bore to an exterior of the central mandrel, a hollow sleeve rotatably mounted around the central mandrel, and at least one sleeve port through the sleeve for fluid flow from within the sleeve from the exterior of the central mandrel to an exterior of the sleeve, the at least one sleeve port defined by a wall on the sleeve. In one aspect the wash nozzle includes apparatus for selective rotation of the sleeve about the mandrel. In one aspect flow through the wash nozzle is stopped to effect sleeve rotation and, in one particular aspect, flow through the nozzle is then re-established. Methods have been invented using such wash nozzles for wellbore washing operations and/or cuttings removal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.