(19)
(11) EP 2 554 778 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
02.12.2015 Bulletin 2015/49

(43) Date of publication A2:
06.02.2013 Bulletin 2013/06

(21) Application number: 12179100.8

(22) Date of filing: 02.08.2012
(51) International Patent Classification (IPC): 
E21B 7/06(2006.01)
 E21B 7/15(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 02.08.2011 US 201161514304 P

(71) Applicant: Halliburton Energy Services, Inc.
Houston, TX 77072 (US)

(72) Inventor:
  • Dirksen, Ronald J.
    Spring, TX Texas 77389 (US)

(74) Representative: Patel, Nikesh et al
A.A. Thornton & Co. 10 Old Bailey
London EC4M 7NG
London EC4M 7NG (GB)

   


(54) Systems and Methods for Directional Pulsed Electric Drilling


(57) Pulsed-electric drilling systems can be augmented with a steering mechanism that shifts at least a portion of a bit relative to a borehole centerline. Illustrative mechanisms include ball-and-socket joints(82), pivot-and-hinge joints, rotary steerable systems, and bent subs. As the bit (26) detaches formation material using electric pulses, the detached material being flushed away by a flow of drilling fluid, the shifting of the bit from the centerline causes the borehole to turn in the direction of the bit.







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Search report