[12] Patent
[11] Patent No.:GC0009336  
[45] Date of Publishing the Grant of the Patent: 31/Dec /2018                56/2018  
Number of the Decision to Grant the Patent:2018/141364
Date of the Decision to Grant the Patent:11/Dec/2018

[21] Application No.:GC 2016-30752

[22] Filing Date:18/1/2016

[30] Priority:

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

[72] Inventors:1- Gustav E. LANGE،2- Fraser WHEELER

[73] Owner: Halliburton Energy Services, Inc., 3000 N. Sam Houston Parkway E., 77032-3219 Texas , Houston, USA

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




Int. Cl.: E21B 17/20, 47/024, 7/06 (2006.01)

[56] Cited Documents:

-US 4 880 067 A (JELSMA HENK H [US]) 14 November 1989
-US 2006/042792 A1 (CONNELL MICHAEL L [US]) 02 March 2006
Examiner: Eng. Mohammed A. AlShamrani

[57] Abstract: Adjustable drill string housings are described for use in the directional drilling of wellbores, e.g. wellbores for hydrocarbon recovery wells. The adjustable drill string housings permit adjustment of a bend angle in the housings without removing the housings from a wellbore. In some exemplary embodiments, the bend angle can be adjusted by changing the internal stresses in a support member carried by the housings. In other embodiments, the bend angle may be adjusted by causing failure of sacrificial support members carried by the housings, and the failure may be caused by delivering chemicals through a chemical delivery system to the sacrificial support members. Methods of operating the adjustable drill string housings include multi-lateral drilling operations wherein the bend angle is adjusted when a casing window has been detected.
No. of claims: 18     No. of figures: 32


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