Boring or penetrating the earth – Means traveling with tool to constrain tool to bore along... – Sectional guide or shaft having means to lock sections in...
Patent
1981-04-24
1984-05-08
Pate, III, William F.
Boring or penetrating the earth
Means traveling with tool to constrain tool to bore along...
Sectional guide or shaft having means to lock sections in...
175 61, 285 2, E21B 706
Patent
active
044469322
ABSTRACT:
A method and apparatus for controlling the depth at which deviation occurs of a conductor casing driven vertically into the ocean floor from an offshore oil platform. A retractable shear pin engages both members of an articulated joint inserted between two sections of the conductor casing, thus preventing relative movement and locking it into a uniform vertical alignment. This ambient pressure increases with depth, thereby tending to force the shear pin to retract. Movement of the shear pin is internally prevented until the force exerted by the pressure exceeds a desired precalculated valve. The shear pin disengages from the articulated joint, resulting in deviation of the path of the conductor casing at a remote point.
REFERENCES:
patent: 2402238 (1946-06-01), Carpenter
patent: 3119298 (1964-01-01), Brown
patent: 3358770 (1967-12-01), Zandmer
patent: 3717208 (1973-02-01), Anderson
patent: 4286662 (1981-09-01), Page, Jr.
Pate III William F.
Petro-Drive, Inc.
Reiter Bernard A.
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