(19)
(11)EP 4 219 885 A3

(12)EUROPEAN PATENT APPLICATION

(88)Date of publication A3:
08.11.2023 Bulletin 2023/45

(43)Date of publication A2:
02.08.2023 Bulletin 2023/31

(21)Application number: 22213606.1

(22)Date of filing:  11.04.2008
(51)International Patent Classification (IPC): 
E21B 23/00(2006.01)
E21B 33/13(2006.01)
E21B 43/10(2006.01)
E21B 33/12(2006.01)
E21B 49/00(2006.01)
E21B 34/14(2006.01)
(52)Cooperative Patent Classification (CPC):
E21B 34/14; E21B 43/103; E21B 43/105; E21B 2200/05
(84)Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

(30)Priority: 20.04.2007 US 737868

(62)Application number of the earlier application in accordance with Art. 76 EPC:
20158712.8 / 3674513
08745667.9 / 2140098

(71)Applicant: Halliburton Energy Services, Inc.
Houston, TX 77032 (US)

(72)Inventors:
  • BRISCO, David
    Texas, 77032 (US)
  • WATSON, Brock
    Texas, 77032 (US)
  • ECHOLS, Ralph
    Texas, 77032 (US)

(74)Representative: Bone, Alexander Marcus Thomas et al
AA Thornton IP LLP 8th Floor, 125 Old Broad Street
London EC2N 1AR
London EC2N 1AR (GB)

  


(54)RUNNING TOOL FOR EXPANDABLE LINER HANGER AND ASSOCIATED METHODS


(57) A running tool includes subassemblies which release the running tool from the liner hanger in response to application of alternating tensile and compressive forces after application of left-hand torque. A running tool includes subassemblies which set the liner hanger in response to left-hand torque followed by increased pressure, and in response to increased pressure without prior left-hand torque being applied. A running tool includes threaded connections, without torque transmitted through the running tool being transmitted by the threaded connections. A method of setting a liner hanger includes applying a compressive force to the running tool; then applying left-hand torque to the running tool; and then applying a tensile force to the running tool. A method of releasing a liner hanger includes applying left-hand torque to the running tool; and then releasing the running tool from the liner hanger by applying a tensile force to the running tool.







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Search report