Apparatus and methods for cleaning a well
US4919204A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 19, 1989 |
| Grant date | Apr 24, 1990 |
| Priority date | — |
| Expiry date | Jan 19, 2009 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B41/0078
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Apparatus for pressurized cleaning of well flow conductors. The apparatus has a non-rotating inner mandrel, an adapter to connect the inner mandrel to a work string, a rotating housing on the exterior of the inner mandrel, and a nozzle body attached to the housing. An alternative embodiment of the invention allows cleaning tools to be attached to a modified nozzle body and rotated therewith. Fluid pressure flowing through the inner mandrel will cause the housing to rotate relative to the inner mandrel. Rotation is used to direct fluid jets in the nozzle body towards different portions of the interior of the flow conductor. Rotation of a cleaning tool can also be used for combined mechanical and hydraulic drilling to remove deposits from within a well flow conductor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.