[12] Patent
[11] Patent No.:GC0007578  
[45] Date of Publishing the Grant of the Patent: 30/Apr /2018                48/2018  
Number of the Decision to Grant the Patent:2018/126011
Date of the Decision to Grant the Patent:15/Apr/2018

[21] Application No.:GC 2013-23993

[22] Filing Date:1/4/2013

[30] Priority:

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

[72] Inventors:1- CHANG, Chung،2- Arthur CHENG ،3- KAINER, Gary

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

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




Int. Cl.: G01V 1/52 (2006.01)

[56] Cited Documents:

-US 2011/0308858 A1 (MENGER et al.) 22 December 2011
-US 2008/0142266 A1 (NICHOLS et al.) 19 June 2008
-US 5,343,001 A (COWLES et al.) 30 August 1994
-US 5,289,433 A (COWLES et al.) 22 February 1994
-US 5,728,978 A (ROBERTS et al.) 17 March 1998
-US 2005/0279565 A1 (ARIAN et al.) 22 December 2005
-US 7,997,380 82 (ARIAN et al) 16 August 2011
-US 2007/01195899 A1 (HALL et al.) 31 May 2007
-US 7,377,315 82 (HALL et al.) 27 May 2008
Examiner: Eng. Mohammed A. AlShamrani

[57] Abstract: Various systems and methods for implementing and using a variable stiffness downhole tool housing include cylindrical segments positioned along a common axis, with a pair of segments each coupled to a bulkhead and positioned at either axial end of the tool housing. The housing also includes a flexible cylindrical sleeve, positioned along the common axis between two of the plurality of cylindrical segments, that includes two regions with an outer diameter no larger than a common segment inner diameter and a third region located between the two regions and with an outer diameter no larger than a common segment outer diameter (the two regions each at least partially inserted into an end of one segment). A stiffness controller controls the stiffness of the tool housing by controlling at least part of an axial force exerted between the two segments.
No. of claims: 20     No. of figures: 8


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