Propulsion apparatus for positioning selected tools in tubular members
US5209304A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 16, 1991 |
| Grant date | May 11, 1993 |
| Priority date | — |
| Expiry date | Aug 16, 2011 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B23/10
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A propulsion apparatus is provided for attachment to a selected tool for propelling and positioning the tool in a tubular member in response to fluid pressure in the tubular member and includes a tubular mandrel terminating in a lower free end, a tubular sleeve disposed over the mandrel and adapted for coaxial sliding movement with respect thereto, a cup assembly mounted on the sleeve and cooperating therewith and with the fluid pressure exerted within the tubular member for translating fluid differential pressure developed across the cup assembly into preselected propelling forces, and sleeve retaining means for cooperating with the sleeve and mandrel for positioning and retaining the sleeve in a first position with respect to the mandrel and transmitting the propelling forces to the mandrel and attached tool for propelling and positioning the tool to selected locations within the tubular member. The cup assembly and sleeve retaining means also cooperate to respond to a preselected change in the fluid pressure differential acting across the cup assembly for releasing the sleeve and permitting the sleeve to move from the first position with respect to the mandrel and allow substant…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.