Method of installing well conductors

Details Method of installing well conductors Method of installing well conductors

E - Fixed Constructions

21

B

E21B 19/08 (2006.01) E21B 7/04 (2006.01) E21B 7/12 (2006.01) E21B 17/01 (2006.01) E21B 19/00 (2006.01) E21B 33/043 (2006.01)

Patent

CA 2058789

This invention pertains to a method of installing well conductors in such a way that the load upon the platform is significantly reduced thereby also eliminating the need for additional framing members. In accordance with this method, an end region of a well conductor is plugged which, if the conductor has a diameter-to-wall thickness ratio of about thirty to one (30:1), will cause the conductor to achieve nearly neutral buoyancy. By selectively adjusting the buoyancy of the conductor, such as by flooding or de-ballasting, additional conductor lengths may be added without imposing an unduly large load upon the platform. In this fashion, a smaller crane will be able to lower the conductor string without the need for a much larger derrick crane, which may then be more efficiently used solely to upend and stab the elongated conductors through the platform.

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