Articulated multiple buoy marine platform apparatus and method of installation

Abstract

A marine platform (and method of installation) provides a plurality of buoys, a platform having a peripheral portion that includes a plurality of attachment positions, one attachment position for each buoy, and an articulating connection that connects each buoy to the platform at a respective attachment position, the connection allowing for sea state induced buoy motions while minimizing effect on the platform. A method of installation places the platform (including oil and gas drilling and/or production facility next to the buoys. Ballasting moves the platform and buoys relative to one another until connections are perfected between each buoy and the platform.

1 . A method of installing an oil and gas well drilling or production platform in an offshore deep water marine environment, comprising the steps of: 
 a) placing a plurality of buoys;    b) floating a platform in the marine environment having an oil and gas well drilling or production facility to the location of the buoys, the platform including a peripheral portion that includes a plurality of connecting positions, one connecting position for each buoy; and    c) ballasting the platform and buoys relative to one another until each buoy connects with the platform and substantially all of the weight of the platform is supported by the buoys.    
     
     
         2 . The method of  claim 1  further comprising the step of making articulating connections that connect each buoy to the platform at respective connecting positions, the plurality of articulating connections allowing for buoy motions induced by sea movement while reducing sea movement effect on the platform.  
     
     
         3 . The method of  claim 1  further comprising the step of mooring each buoy with an anchor line.  
     
     
         4 . The method of  claim 2  wherein each of the articulating connections includes correspondingly concave and convex engaging portions.  
     
     
         5 . The marine platform of  claim 2  wherein the buoy has a convex articulating portion and the platform has a concave articulating portion and in step “c” the barge and buoys are ballasted until concave and convex portions engage for each buoy and the platform.  
     
     
         6 . The marine platform of  claim 2  wherein the buoy has a concave articulating portion and the platform has a convex articulating portion.  
     
     
         7 . The method of  claim 1  wherein each buoy has a height and a diameter, the height being greater than the diameter, and further comprising the step of positioning the barge in between at least two buoys.  
     
     
         8 . The method of  claim 1  wherein there are at least three buoys and at least three attachment positions.  
     
     
         9 . The method of  claim 1  wherein there are at least four buoys.  
     
     
         10 . The method of  claim 1  wherein the platform is comprised of a trussed deck and wherein steps “b” and “c” include connecting each buoy to the trussed deck.  
     
     
         11 . The method of  claim 1  further comprising the steps of providing a single spar and transferring the platform from the buoys to the single spar.  
     
     
         12 . A method of installing an oil and gas well production platform in an offshore deep water marine environment, comprising the steps of: 
 a) floating a multi-ton package to a selected offshore location, the package having a plurality of connectors and wherein the connectors are preliminarily positioned at a higher elevational position;    b) positioning a plurality of floating buoys at a selected offshore location, each buoy having a buoy connector portion at its upper end;    c) preliminarily positioning the buoy connectors at a selected elevational position;    d) ballasting the floating package and buoys relative to one another so that the package connectors and the buoy connectors engage to define a plurality of articulating connections and where substantially all of the weight of the platform is supported by the buoys.    
     
     
         13 . The method of  claim 12  wherein step “a” comprises floating a multi-ton package to a selected offshore location, the package having an oil and gas well drilling facility thereon and a plurality of connectors, and wherein the connectors are preliminarily positioned at a higher elevational position.  
     
     
         14 . The method of  claim 12  wherein in step “d”, the floating package is ballasted from a higher elevational position to a lower elevational position that engages the connectors of the package with the buoy connectors.  
     
     
         15 . The method of  claim 12  wherein in step “d” the buoys are ballasted from a lower position to a higher position that engages the plurality of package connectors and plurality of buoy connectors.  
     
     
         16 . The method of  claim 12  wherein in step “a” there is provided a barge having a deck that supports the multi-ton package and step “a” includes floating the multi-ton package and barge to a selected offshore location.  
     
     
         17 . The method of  claim 12  wherein in step “d”, the articulating connections each include correspondingly shaped concave and convex portions.  
     
     
         18 . The method of  claim 12  wherein the articulating connections include universal joint connections.  
     
     
         19 . The method of  claim 12  wherein in steps “a” through “c”, the floating package is positioned in between first and second pairs of the buoys.  
     
     
         20 . The method of  claim 12  wherein steps “a” through “c” include positioning the package in between first and second pairs of the buoys and wherein the buoys have submerged portions that do not make contact with the floating package.  
     
     
         21 . A method of installing an oil and gas well production platform in an offshore deep water marine environment, comprising the steps of: 
 a) floating a multi-ton package to a selected offshore location, the package having a plurality of connectors and wherein the connectors are preliminarily positioned at a higher elevational position;    b) positioning a plurality of floating buoys at a selected offshore location, each buoy having a buoy connector portion at its upper end;    c) preliminarily positioning the buoy connectors at a selected elevational position;    d) ballasting the floating package and buoys relative to one another so that the package connectors and the buoy connectors engage to define a plurality of articulating connectors, including at least one articulating connector for each floating buoy.    
     
     
         22 . The method of  claim 21  further comprising the steps of providing a single spar and transferring the platform from the buoys to the single spar.  
     
     
         23 . The method of  claim 22  further comprising the step of ballasting the buoys and spar relative to one another during the transfer.  
     
     
         24 . The method of  claim 21  further comprising the step of making articulating connections that connect each buoy to the platform at respective connecting positions, the plurality of articulating connections allowing for buoy motions induced by sea movement while reducing sea movement effect on the platform.  
     
     
         25 . The method of  claim 21  wherein each of the articulating connections includes correspondingly concave and convex engaging portions.  
     
     
         26 . The marine platform of  claim 21  wherein the buoy has a convex articulating portion and the platform has a concave articulating portion and in step “c” the barge and buoys are ballasted until concave and convex portions engage for each buoy and the platform.  
     
     
         27 . The marine platform of  claim 21  wherein the buoy has a concave articulating portion and the platform has a convex articulating portion.  
     
     
         28 . The method of  claim 21  wherein each buoy has a height and a diameter, the height being greater than the diameter, and further comprising the step of positioning the barge in between at least two buoys.  
     
     
         29 . The method of  claim 21  wherein the platform is comprised of a trussed deck and wherein steps “b” and “c” include connecting each buoy to the trussed deck.  
     
     
         30 . A method of installing an oil and gas well production platform in an offshore deep water marine environment, comprising the steps of: 
 a) floating a multi-ton package to a selected offshore location, the package having a plurality of connectors and wherein the connectors are preliminarily positioned at a higher elevational position;    b) positioning a plurality of floating buoys at a selected offshore location, each buoy having a buoy connector portion at its upper end;    c) preliminarily positioning the buoy connectors at a selected elevational position;    d) positioning a floating spar next to the combination of buoys and multi-ton package; and    e) transferring the package from the buoys to the spar by laterally moving the spar relative to the combination of buoys and package until they are generally vertically aligned and then lowering the package to the spar.