MILLING SYSTEM FOR ABANDONING A WELLBORE

Title:

MILLING SYSTEM FOR ABANDONING A WELLBORE

Document Type and Number:

WIPO Patent Application WO/2015/054227

Kind Code:

A3

Abstract:

A mill for use in a wellbore includes a tubular housing having a bore therethrough and a plurality of eccentrically arranged pockets formed in a wall thereof and an arm disposed in each pocket. Each arm has a body portion and a blade portion extending from an outer surface of the body portion and is movable between an extended position and a retracted position. The mill further includes cutters disposed along each blade portion and a block disposed in each pocket and connected to the housing. Each block has a guide engaged with a mating guide of the respective body portion and an inner passage for providing fluid communication between the housing bore and the respective pocket. The mill further includes an actuator for extending the arms.

Inventors:

BANSAL RAM K (US)
HAQ MOHAMMED ALEEMUL (US)
BAILEY THOMAS F (US)
SEGURA RICHARD J (US)
SMITH IAN (GB)

Application Number:

PCT/US2014/059462

Publication Date:

August 20, 2015

Filing Date:

October 07, 2014

Export Citation:

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Assignee:

WEATHERFORD LAMB (US)

International Classes:

E21B29/00; E21B10/26; E21B10/32; E21B33/13

Domestic Patent References:

WO1997011250A1

1997-03-27

Foreign References:

US20110220357A1	2011-09-15
US3419077A	1968-12-31
US5620051A	1997-04-15

Other References: