Wellbore milling system
US5743331A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 1996 |
| Grant date | Apr 28, 1998 |
| Priority date | — |
| Expiry date | Sep 18, 2016 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B34/10
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention, in one aspect, discloses a system for selectively anchoring a wellbore tool at a desired location in a wellbore or tubular member such as casing or tubing; such a system with a selectively settable anchor assembly that has a piston that is moved upwardly by fluid under pressure from the surface thereby moving one or more movable slips out from a body of the anchor assembly to set the anchor assembly in place; and such a system with a whipstock connected to the anchor assembly. Fluid under pressure pumped from the surface down a workstring to which the system is connected flows to the anchor assembly through or adjacent the whipstock. In one aspect a mill (or mills) is releasably connected to the whipstock. In one aspect, fluid under pressure flows through or adjacent the mill(s) to the whipstock. In one aspect a selectively actuable valve assembly is provided for selectively controlling the flow of fluid under pressure from an inlet end of the valve assembly out through an outlet end thereof for flow, e.g., to a mill, whipstock and/or anchor assembly. In one aspect such a valve assembly is used with a system as previously described to selectively provide actu…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.