[12] Patent
[11] Patent No.:GC0009330  
[45] Date of Publishing the Grant of the Patent: 31/Dec /2018                56/2018  
Number of the Decision to Grant the Patent:2018/141345
Date of the Decision to Grant the Patent:11/Dec/2018

[21] Application No.:GC 2016-30836

[22] Filing Date:7/2/2016

[30] Priority:

[33] State [32] Priority date [31] Priority No.
PCT
6/3/2015
PCT/US15/19257

[72] Inventors:1- PATWA, Ruchir Shirish،2- WINSLOW, Daniel،3- DEOLALIKAR, Neelesh

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

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

  

 

  

[51]IPC:
Int. Cl.: E21B 17/20, 47/02, 7/08 (2006.01)

[56] Cited Documents:

-US 6092610 A (SCHLUMBERGER TECHNOLOGY CORPS [US]) 5 July 2000
-US 20040262043 A1 (SCHUAF STUART, INTERSYN IP HOLDINGS, LLC) 30 December 2009
 
Examiner: Eng. Imad A. AlAhaidib

[54] LOAD-BEARING UNIVERSAL JOINT WITH SELF-ENERGIZING SEALS FOR A ROTARY STEERABLE DRILLING TOOL
[57] Abstract: A rotary steerable drilling tool and a method according to which a universal joint is sealed. In one embodiment, the method includes providing the collar, the shaft, the universal joint, and first and second shoulders between which the universal joint is positioned; providing first and second self-energizing seals between the collar and the shaft on opposite sides of the universal joint; rotating the collar and the shaft; seating the first self-energizing seal against the first shoulder; and seating a second self-energizing seal against the second shoulder. In one embodiment, the universal joint includes a convex surface formed on the shaft; a first concave surface extending circumferentially about the shaft and adapted to mate with the convex surface to carry a first axial load; and a spacer ring defining a second concave surface adapted to mate with the convex surface to carry a second axial load.
No. of claims: 20     No. of figures: 8


 

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