Expandable underreamer/stabilizer

Details Expandable underreamer/stabilizer Expandable underreamer/stabilizer

E - Fixed Constructions

21

B

E21B 10/34 (2006.01) E21B 10/26 (2006.01)

Patent

CA 2557923

A downhole tool is disclosed that functions as an underreamer, or alternatively, as a stabilizer in an underreamed borehole. An embodiment of the tool includes one or more moveable arms disposed within a body having a flowbore therethrough in fluid communication with the wellbore annulus. The tool alternates between collapsed and expanded positions in response to differential fluid pressure between the flowbore and the wellbore annulus. In one embodiment, the tool moves automatically in response to differential pressure. In a second embodiment, the tool must be selectively actuated before it is moveable. When the tool expands, the arms are preferably translated axially upwardly, while simultaneously being extended radially outwardly from the body. The expanded tool diameter is adjustable at the surface without changing components. The arms may include borehole engaging pads that comprise cutting structures or wear structures or both, depending upon the function of the tool.

Affiliated with

Also associated with

Rating

Expandable underreamer/stabilizer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Expandable underreamer/stabilizer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Expandable underreamer/stabilizer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1921619