Title:
APPARATUS AND METHOD FOR INSTALLING A BARRIER IN A TUBULAR CONDUIT
Document Type and Number:
WIPO Patent Application WO/2014/140011
Kind Code:
A3
Abstract:
Apparatus and Method for Installing a Barrier in a Tubular Conduit A welding apparatus (2) for installing a welded barrier element (24) in a tubular conduit (6), the welding apparatus comprising a longitudinal housing (8), a welding head (10) at a first end (12) of the housing (8), the welding head (10) being oriented away from the first end (12), a rotary drive system (14) for causing relative rotation of the welding head (10) and the housing (8), a centraliser mechanism (16) extending transversely out of the housing (8) for centralising the welding apparatus (2) within a tubular conduit (6), and a releasable holder (20) at the first end for selectively holding or releasing a shaft (22) of a barrier element (24) to be welded in the tubular conduit (6). A method of installing a welded barrier element in a tubular conduit, such as an oil or gas well, or borehole casing, or borehole heat exchanger, for sealing the conduit, is also disclosed.
Inventors:
ZAYNULIN DMITRIY (GB)
STEWART JAMES (NL)
STEWART JAMES (NL)
Application Number:
PCT/EP2014/054699
Publication Date:
December 11, 2014
Filing Date:
March 11, 2014
Export Citation:
Assignee:
GREENFIELD MASTER IPCO LTD (GB)
International Classes:
B23K9/028; B23K26/10; B23K37/02; B23K37/053; E21B33/12
Foreign References:
| US20100325859A1 | 2010-12-30 | |||
| US3394442A | 1968-07-30 | |||
| US4262187A | 1981-04-14 | |||
| US3460237A | 1969-08-12 |
Attorney, Agent or Firm:
JENKINS, Peter David (Bedford HouseJohn Street,London, Greater London WC1N 2BF, GB)
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