(19)
(11) EP 2 284 356 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
07.05.2014 Bulletin 2014/19

(43) Date of publication A2:
16.02.2011 Bulletin 2011/07

(21) Application number: 10188275.1

(22) Date of filing: 12.12.2006
(51) International Patent Classification (IPC): 
E21B 19/16(2006.01)
E21B 19/10(2006.01)
 E21B 33/16(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

(30) Priority: 12.12.2005 US 749451 P

(62) Application number of the earlier application in accordance with Art. 76 EPC:
10156425.0 / 2189618
06848570.5 / 1963612

(71) Applicant: Weatherford/Lamb, Inc.
Houston, TX 77027 (US)

(72) Inventors:
  • Boutwell, Jr., Doyle Frederic
    Houston, TX 77084 (US)
  • Odell, II, Albert C
    Kingwood, TX 77339 (US)
  • Giroux, Richard Lee
    Cypress, TX 77429 (US)
  • Le, Tuong Thanh
    Katy, TX 77450 (US)
  • Thompson, Gary
    Katy, TX 77450 (US)
  • Heidecke, Karsten
    Houston, TX 77095 (US)
  • Lorenz, Joerg
    30938, Burgwedel (DE)
  • Hayes, Michael
    Houston, TX 77095 (US)
  • Pietras, Bernd-Georg
    30900, Wedemark (DE)

(74) Representative: Talbot-Ponsonby, Daniel Frederick 
Marks & Clerk LLP Fletcher House Heatley Road The Oxford Science Park
Oxford OX4 4GE
Oxford OX4 4GE (GB)

   


(54) Apparatus for gripping a tubular on a drilling rig


(57) Methods and apparatus for running tubulars into and out of a wellbore. A gripping apparatus is activated with an actuator having a primary actuator and a redundant safety feature. The redundant safety feature may include one or more redundant fluid operated pistons. The gripping apparatus may include an integrated safety system adapted to prevent damage to the tubulars while making and breaking out connections between the tubulars and the tubular string.







Search report









Search report