Extendable cutting tools for use in a wellbore
US8540035B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2009 |
| Grant date | Sep 24, 2013 |
| Priority date | — |
| Expiry date | Aug 27, 2030 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/14
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Embodiments of the present invention generally relate to extendable cutting tools for use in a wellbore. In one embodiment, a tool for use in a wellbore includes a tubular body having a bore therethrough, an opening through a wall thereof, and a connector at each longitudinal end thereof; and an arm. The arm is pivotally connected to a first piston and rotationally coupled to the body, is disposed in the opening in a retracted position, and is movable to an extended position where an outer surface of the arm extends outward past an outer surface of the body. The tool further includes the first piston. The first piston is disposed in the body bore, has a bore therethrough, and is operable to move the arm from the retracted position to the extended position in response to fluid pressure in the piston bore exceeding fluid pressure in the opening. The tool further includes a lock operable to retain the first piston in the retracted position; and a second piston operably coupled to the lock.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.