Boring or penetrating the earth – Below-ground impact members – With releasable means to detachably retain telescoping...
Patent
1973-12-14
1976-12-14
Shapiro, Jacob
Boring or penetrating the earth
Below-ground impact members
With releasable means to detachably retain telescoping...
175 7, 61101, E02B 1700
Patent
active
039967549
ABSTRACT:
A mobile marine drilling unit comprising: a floatable base; a floatable platform; and a vertical support leg attached to said base and extending upwardly through a well provided therefor in said platform. Said base and a major portion of said leg being submergible in a body of water for support on the floor thereof. The support leg and platform are provided with elevating mechanisms for elevating the platform above said body of water on said leg. In deploying the drilling unit, the unit is floated to a selected site with the base drawn up underneath the platform and the leg extending upwardly through the well. When the site is reached the base is submerged with ballast until it is supported on the water body floor. Then the platform is elevated above the water body by the elevating mechanisms. A derrick may be moved over the leg well and drilling in the water body floor conducted through the well and leg.
REFERENCES:
patent: 2248051 (1941-07-01), Armstrong
patent: 3244242 (1966-04-01), Wolff
patent: 3433024 (1969-03-01), Diamond et al.
patent: 3456447 (1969-07-01), MacKintosh
patent: 3474749 (1969-10-01), Williamson
patent: 3793840 (1974-02-01), Mott
patent: 3898847 (1975-08-01), Magnanini
Ocean Industry of Mar. 1973, p. 30.
World Oil of Nov. 1973, pp. 90-92.
Berryhill Bill B.
Engineering Technology Analysts, Inc.
Shapiro Jacob
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