to the platform 11 or well structure 16 in a sealing configuration rather the platform 11 is preferably a metal grating that allows movement of fluid therethrough fig5 shows the platform 11 in place on the well system 16 prior to lowering the habitat 10 in some instances however it may be desirable to lower platform 11 and habitat 10 as a unitary structure with well completion tools secured therein as illustrated in fig2 the habitat 10 is sometimes referred to hereinafter as 34 chamber 34 to reflect the fact that the internal work space of the habitat provides protection for the divers from ocean currents also when the water is pumped from the habitat 10 a water free work space is provided fig2 also illustrates a lay barge or ship 22 being used in conjunction with the drilling structure 35 whereby the flow lines 18a may be laid by means of a cable 23 or other suitable means used for this purpose methods for laying flow lines are well known in the art thus as the well is being completed the chamber 10 is lowered while the flow lines 18a are being pulled toward the well system 16 after the chamber 10 has been placed in position on the well connecting of.