DOWNHOLE TOOL - PARADIGM OILFIELD SERVICES LTD

Title:

DOWNHOLE TOOL

Document Type and Number:

WIPO Patent Application WO/2010/092389

Kind Code:

A3

Abstract:

The present invention relates to downhole tools, and in particular an underreamer tool (1) for use in a wellbore of an oil or gas well and a method of actuation. In an embodiment, the underreamer tool (1) has body (10) having a longitudinal axis(18) and a fluid conduit, a tool element (20) and an actuation device (90) configured to urge the tool element (20) relative to the body (10) from a first configuration into a second configuration. In this embodiment, a portion (30) of the tool (1) has a curved actuation surface (30e) and as the tool element (20) is urged across the curved actuation surface (30e), the tool element (20) is moved radially with respect to the body (10) of the tool (1). Typically, the actuation device (90) may include a piston (60) driven by pressure of fluid circulated through the fluid flow conduit (16).

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Inventors:

RITCHIE DARREN JOHN (GB)
MACHOCKI KRZYSZTOF (GB)
MACKENZIE ALAN (GB)

Application Number:

PCT/GB2010/050219

Publication Date:

May 05, 2011

Filing Date:

February 11, 2010

Export Citation:

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Assignee:

PARADIGM OILFIELD SERVICES LTD (GB)
RITCHIE DARREN JOHN (GB)
MACHOCKI KRZYSZTOF (GB)
MACKENZIE ALAN (GB)

International Classes:

E21B23/00

Foreign References:

DE2723785A1	1978-11-30
US20020070052A1	2002-06-13
US20070163808A1	2007-07-19

Other References: