[12] Patent
[11] Patent No.:GC0009418  
[45] Date of Publishing the Grant of the Patent: 31/Dec /2018                56/2018  
Number of the Decision to Grant the Patent:2018/141925
Date of the Decision to Grant the Patent:19/Dec/2018

[21] Application No.:GC 2014-26530

[22] Filing Date:27/2/2014

[30] Priority:

[33] State [32] Priority date [31] Priority No.

[72] Inventors:1- DONOVAN, Stacey B.،2- DANCER, William W.

[73] Owner: Halliburton Energy Services,Inc., 10200 Bellaire Boulevard, Houston, 77072, Texas , USA

[74] Agent: Saba & Co. T.M.P




Int. Cl.: E21B 29/06, 7/08 (2006.01)

[56] Cited Documents:

-US 2005-0167113 Al (SMITH, RAY C. et al.) 04 August 2005
-US 2010-0224414 Al (RADFORD, STEVEN R. et al.) 09 September 2010
-US 2008-0017378 Al (MCGLOTHEN, JODY R. et al.) 24 January 2008
-US 2011-0220357 Al (SEGURA, RICHARD et al.) 15 September 2011
-US 2009-0133877 Al (NEFF, MICHAEL CLAUDE) 28 May 2009
Examiner: Eng. Ghassan F. AlBuhairan

[57] Abstract: A window milling system can include a window mill having selectively retractable and extendable blades, and a whipstock assembly having a receptacle therein, the window mill being secured relative to the whipstock assembly the blades are received in the receptacle. A method of cutting a window through a wellbore lining can include cutting through the lining with a window mill, then retracting blades of the window mill, and then outwardly extending the blades in a whipstock assembly, thereby securing the whipstock assembly to the window mill. A window mill can include multiple blades adapted for cutting through a wellbore lining, the blades being outwardly extendable relative to a body of the window mill in a well. Another method of cutting a window through a wellbore lining can include a window mill drilling a wellbore outward a substantial distance from the window after the window mill cutting through the lining.
No. of claims: 19     No. of figures: 8


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