Title:
MECHANICALLY ACTUATED CASING DRIVE SYSTEM TOOL
Document Type and Number:
WIPO Patent Application WO/2012/148807
Kind Code:
A3
Abstract:
A casing gripper (100) is stabbed into a casing (300) and energized by a top drive (401), gripping the casing (300). The casing gripper (100) includes a load bearing mandrel (101) that has external threads (114). The casing gripper (100) also includes a nut (113) threaded over the external threads (114), and a wrench (103) having a portion of the upper end (111) of the load bearing mandrel (101) inserted into an opening of the wrench (103). The wrench (103) is configured to prevent rotation of the nut (113) but allow axial movement while the top drive (401) rotates the mandrel (101). The casing gripper (100) includes a grapple (119) coupled to the nut (113) and extending along a portion of the lower end (116) of the load bearing mandrel (101). The grapple (119) moves axially with the nut (113) and is configured to radially expand and engage a casing (300) member.
Inventors:
O'BLENES JONATHAN B (CA)
Application Number:
PCT/US2012/034406
Publication Date:
September 06, 2013
Filing Date:
April 20, 2012
Export Citation:
Assignee:
TESCO CORP (US)
O'BLENES JONATHAN B (CA)
O'BLENES JONATHAN B (CA)
International Classes:
E21B3/02; E21B7/20; E21B19/06; E21B19/16; E21B21/02
Domestic Patent References:
| WO2006116870A1 | 2006-11-09 | |||
| WO2010006441A1 | 2010-01-21 | |||
| WO2002086279A1 | 2002-10-31 |
Foreign References:
| US20090321086A1 | 2009-12-31 | |||
| US20090145594A1 | 2009-06-11 |
Attorney, Agent or Firm:
POWELL, W. Allen et al. (Houston, Texas, US)
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