Weight set connecting mechanism for subsea tubular members

E - Fixed Constructions – 21 – B

Patent

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166/51.3

E21B 33/035 (2006.01) E21B 33/038 (2006.01) E21B 33/043 (2006.01) F16L 37/088 (2006.01) F16L 37/098 (2006.01)

Patent

CA 2031673

An improved mechanism for connecting tubular members in a subsea well in which the members are locked together in a preloaded condition. In the preferred form of the invention the loading is provided by a series of fingers mounted on the inner tubular member and flexing through a restriction in the outer tubular member during landing and then springing back from such flexed position to engage and wedge against a tapered shoulder at the lower end of the restriction to both lock the inner tubular member in its seated position and also to provide the preloading desired. In a second form, the inner member is landed on a ring which is engaged on the outer tubular member landing seat and then further lowering of the inner member moves a wedge on the inner member to cause the upper end of the ring to engage the internal profile of the outer member and the lower end to engage a lower external profile on the inner member and to be wedged therein to create the lock down and the desired preload. A third form utilizes a lower split landing ring, an upper split latching ring and a resilient loading support sleeve therebetween with a wedge on the inner member to set the split latching ring, in place of the single ring of the second form. The third form operates on the same principle as the second form.

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