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Coiled tubing workover riser

  • US 6,102,125 A
  • Filed: 08/06/1998
  • Issued: 08/15/2000
  • Est. Priority Date: 08/06/1998
  • Status: Expired due to Term
First Claim
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1. An apparatus for performing workover operations on a subsea well comprising:

  • a lower riser portion for connecting to a subsea production tree, said lower riser portion having a production passage adapted to register with the production passage of said tree, and an annulus access passage adapted to register with an annulus access passage in said tree;

    a monobore riser extending upward from the lower riser portion to the surface;

    a string of tubing extending from the surface through said monobore riser, defining an inner riser passage and annular riser passage; and

    a circulation plug secured proximate a lower end of the tubing and landed in said lower riser portion, said circulation plug having a first passage communicating the production passage in said lower riser portion with one of the riser passages, and a second passage communicating the annulus access passage in said lower riser portion with the other of the riser passages.

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