(19)
(11) EP 1 712 729 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
27.12.2006 Bulletin 2006/52

(43) Date of publication A2:
18.10.2006 Bulletin 2006/42

(21) Application number: 06012127.4

(22) Date of filing: 15.05.2002
(51) International Patent Classification (IPC): 
E21B 23/06(2006.01)
E21B 33/12(2006.01)
 E21B 33/04(2006.01)
E21B 33/129(2006.01)
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 18.05.2001 US 292049 P
31.08.2001 US 316459 P
31.08.2001 US 943854
31.08.2001 US 943701
31.08.2001 US 316572 P
17.10.2001 US 981487
19.10.2001 US 83320
04.12.2001 US 4945
04.12.2001 US 4588
02.05.2002 US 136969
02.05.2002 US 136992

(62) Application number of the earlier application in accordance with Art. 76 EPC:
02736875.2 / 1392953

(71) Applicant: Dril-Quip, Inc.
Houston, Texas 77040 (US)

(72) Inventors:
  • Yokley, John M.
    Kingwood TX 77339 (US)
  • Reimert, Larry E.
    Houston TX 77024 (US)

(74) Representative: Lockey, Robert Alexander 
Forrester & Boehmert Pettenkoferstrasse 20-22
80336 München
80336 München (DE)

   


(54) Liner hanger, running tool and method


(57) A liner hanger running tool (120) includes improvements to the running tool release mechanism, the packoff bushing, and the packer setting assembly. A method is provided for reliably releasing a running tool from a liner hanger (110), for allowing stabbing of the running tool packoff bushing (10) into the top of the liner hanger, and for reliably setting the radial set packer element. The port closure member (212) is movable with a tubular body from a port isolation position to an open port position. The tool includes an annular seal assembly and a substantially conical wedge ring having an outer surface configured to radially expand the annular seal assembly. A ball (240) is lowered into a diverter and thus guided into a pocket (286) in one side thereof to permit passage of a pump down plug (180) into a lower wiper plug (181). A slip assembly carried about a liner for lowering into a wellbore includes a C-ring (64), which expands to-cause its teeth to engage with the wellbore. A plug holder (10) sub temporarily supports a liner wiper plug, so that a pump down plug may land in the liner wiper plug and be supported from a generally tubular body of the plug holder sub.







Search report