[12] Patent
[11] Patent No.:GC0007513  
[45] Date of Publishing the Grant of the Patent: 30/Apr /2018                48/2018  
Number of the Decision to Grant the Patent:2018/125432
Date of the Decision to Grant the Patent:04/Apr/2018

[21] Application No.:GC 2012-22728

[22] Filing Date:6/11/2012

[30] Priority:

[33] State [32] Priority date [31] Priority No.
PCT
8/11/2011
PCT/US11/59743

[72] Inventors:1- LOVORN, James R.،2- DAVIS, Nancy S.

[73] Owner: HALLIBURTON ENERGY SERVICES, INC., 10200 Bellaire Boulevard, Texas 77072, Houston, USA

[74] Agent: Abu-Gazaleh Intellectual Property L.L.C

  

 

  

[51]IPC:
Int. Cl.: E21B 33/04, 33/06 (2006.01)

[56] Cited Documents:

-US 20070045006 A1 (SVEN, KRUEGER et al.) 01 March 2007
-US 20070151762 A1 (DONALD, G. REITSMA) 05 July 2007
-US 20100186960 A1 (REITSMA, DONALD G. et al.) 29 July 2010
 
Examiner: Eng. Mohammed A. AlShamrani

[54] PREEMPTIVE SETPOINT PRESSURE OFFSET FOR FLOW DIVERSION IN DRILLING OPERATIONS
[57] Abstract: A method of controlling pressure in a well can include transmitting an instruction to change flow through an annulus formed radially between a drill string and a wellbore, and adjusting a pressure setpoint in response to the transmitting. A well drilling system can include a flow control device which varies flow through a drill string, and a control system which changes a pressure setpoint in response to an instruction for the flow control device to change the flow through the drill string. A method of controlling pressure in a well can include transmitting an instruction to divert flow from a drill string, and adjusting a pressure setpoint in response to the transmitting.
No. of claims: 25     No. of figures: 11


 

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