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US 9,598,912 B2Granted
Riser joint connection
AssigneeDmar Engineering, Inc.
InventorsZhiming Huang, Dagang Zhang
Life of this patent
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Abstract
Apparatus and methods related to riser joint connection are described. For example, some embodiments may contain a central coupler, a plurality of reaction collars, collar stoppers, collar caps, and C-rings, for connecting riser joints.
Claims18
An apparatus for riser joint connection, comprising:
- a central coupler defining:
- an upper internally threaded section;
- an upper inner sloped surface;
- a lower inner sloped surface;
- and
- a lower internally threaded section;
- a first riser joint having a lower end inserted into the upper inner sloped surface of the central coupler;
- a first collar stopper threaded around the lower end of the first riser joint;
- a first upper C-ring and a first lower C-ring;
- a first reaction collar fitted around the first riser joint, the first reaction collar defining:
- a first internal upper groove receiving the first upper C-ring;
- a first internal lower groove receiving the first lower C-ring;
- a first lower externally threaded section screwed into the upper internally threaded section of the central coupler;
- and
- a first upper externally threaded section;
- a first collar cap threaded around the first upper externally threaded section of the first reaction collar;
- a second riser joint having an upper end inserted into the lower inner sloped surface of the central coupler;
- a second collar stopper threaded around the upper end of the second riser joint;
- a second upper C-ring and a second lower C-ring;
- a second reaction collar fitted around the second riser joint, the second reaction collar defining:
- a second internal upper groove receiving the second upper C-ring;
- a second internal lower groove receiving the second lower C-ring;
- a second lower externally threaded section;
- and
- a second upper externally threaded section screwed into the lower internally threaded section of the central coupler;
- and
- a second collar cap threaded around the second lower externally threaded section of the second reaction collar.
24 more elements
A method for riser joint connection, comprising:
- mounting a first C-ring and a first lower C-ring into a first internal upper groove and a first internal lower groove of a first reaction collar;
- sliding a first collar cap and a first reaction collar onto a first riser joint;
- mounting a first collar stopper onto the first riser joint;
- mounting a second upper C-ring and a second lower C-ring into a second internal upper groove and a second internal lower groove of a second reaction collar;
- sliding a second collar cap and second reaction collar onto a second riser joint;
- mounting a second collar stopper onto the second riser joint;
- aligning the first and the second riser joints;
- inserting a central coupler that connects with the first reaction collar and the first riser joint from the top and the second reaction collar and the second riser joint from the bottom;
- torquing the first and the second reaction collars to a certain torque value, which pushes the first and the second riser joints against the central coupler tightly, and fits the first lower C-ring and the second upper C-ring between the first internal lower groove and the second internal upper grove of the first and the second reaction collars and the first and the second riser joints to a certain tightness;
- and
- torquing the first and the second collar caps to a certain torque value, which fits the first upper C-ring and the second lower C-ring between the first internal upper groove and the second internal lower groove of the first and the second reaction collars and the first and the second riser joints to a certain tightness.
8 more elements
Dependencies are inferred from the claim text.