[12] Patent
[11] Patent No.:GC0009332  
[45] Date of Publishing the Grant of the Patent: 31/Dec /2018                56/2018  
Number of the Decision to Grant the Patent:2018/141351
Date of the Decision to Grant the Patent:11/Dec/2018

[21] Application No.:GC 2015-29823

[22] Filing Date:2/8/2015

[30] Priority:

[33] State [32] Priority date [31] Priority No.
PCT
11/9/2014
PCT/US14/55158

[72] Inventors:1- Joe Eli HESSŲŒ2- Andrew CUTHBERT

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

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

  

 

  

[51]IPC:
Int. Cl.: E21B 47/00, 49/00 (2006.01)

[56] Cited Documents:

-WO 2014044628 A1 (SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V. et al.) 27 March 2014
-US 6230799 B1 (SLAUGHTER et al.) 15 May 2001

 
Examiner: Eng. Imad A. AlAhaidib

[54] RARE EARTH ALLOYS AS BOREHOLE MARKERS
[57] Abstract: A magnetic marking method includes drilling a borehole and marking a position along an uncased section of the borehole with a magnetic marker comprising a magnetic rare earth alloy. A magnetic marker for open hole use includes an unconsolidated mass of high remanence, magnetized material that comprises a magnetic rare earth alloy. The magnetic marker for open hole use also includes a suspension fluid suited for conveying the magnetized material through a drill string bore into an open borehole. A magnetic marker for a casing terminus includes a magnet comprising a magnetic rare earth alloy and an attachment mechanism that secures the magnet to a casing shoe. Such magnetic markers for open hole use or a casing terminus can be used for borehole intersection operations.
No. of claims: 18     No. of figures: 8


 

Note: Any interested individual may, within 3 months of publication of the grant, file objection thereof with the Grievance Committee after payment of grievance fees.