[12] Patent
[11] Patent No.:GC0009422  
[45] Date of Publishing the Grant of the Patent: 31/Dec /2018                56/2018  
Number of the Decision to Grant the Patent:2018/141929
Date of the Decision to Grant the Patent:19/Dec/2018

[21] Application No.:GC 2014-28553

[22] Filing Date:16/12/2014

[30] Priority:

[33] State [32] Priority date [31] Priority No.
PCT
20/12/2013
PCT/US13/77208

[72] Inventors:1- Nancy S. Davis،2- Cody N. Butler

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

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

  

 

  

[51]IPC:
E21B 21/08

[56] Cited Documents:

-US 2013/0008647 A1 (DIRKSEN et al) 10 January 2013
-US 2013/0314241 A1 (JAMISON et al) 28 November 2013
 
Examiner: Eng. Ahmed Saleem AlHinai

[54] DYNAMIC DETERMINATION OF A SINGLE EQUIVALENT CIRCULATING DENSITY “ECD” USING MULTIPLE ECDS ALONG A WELLBORE
[57] Abstract: A well drilling system and method to balance multiple equivalent circulating density (“ECD”) targets along a wellbore during drilling.
No. of claims: 21     No. of figures: 3


 

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