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Patent Searching and Data


Title:
SEAL ASSEMBLY FOR NESTED DUAL DRILL PIPE
Document Type and Number:
WIPO Patent Application WO/2013/104769
Kind Code:
A3
Abstract:
A seal assembly for a nested dual drill pipe includes a drill pipe member, such as a tube or drill pipe segment, having a female seal assembly (18, 118) and a male seal assembly (16A, 116) at the longitudinal ends thereof. The female seal assembly includes a larger internal diameter portion (18E), a taper (18E1) adjacent thereto, and a smaller internal diameter portion (18F) adjacent to the taper. The male seal assembly includes a smaller external diameter portion (16G), a seal area or groove (16F) adjacent thereto, and a larger external diameter portion (16E) adjacent to the seal groove. The smaller internal diameter portion and the larger external diameter portion have diameters selected to enable free longitudinal movement of the male seal assembly into the female seal assembly while limiting axial displacement to maintain a seal ring (38) in the seal area or groove fully energized.

Inventors:
ESPEN ALHAUG (NO)
Application Number:
PCT/EP2013/050508
Publication Date:
January 16, 2014
Filing Date:
January 11, 2013
Export Citation:
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Assignee:
REELWELL AS (NO)
International Classes:
E21B17/04; E21B17/042; E21B17/18; F16L9/18; F16L15/00; F16L39/00
Foreign References:
US5029906A1991-07-09
US4928999A1990-05-29
DE1020586B1957-12-12
US2850264A1958-09-02
US3786878A1974-01-22
US4655479A1987-04-07
US4632406A1986-12-30
US20050183892A12005-08-25
US4067596A1978-01-10
Other References:
REELWELL: "Male seal assembly of the inner pipe of a dual drill pipe system", INTERNET CITATION, 2 September 2011 (2011-09-02), pages 1 - 4, XP007922409, Retrieved from the Internet [retrieved on 20131120]
Attorney, Agent or Firm:
ERTL, Nick (8 Pembroke RoadSevenoaks, Kent TN13 1XR, GB)
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