Boring or penetrating the earth – Processes – Boring with specific fluid
Reexamination Certificate
2008-05-27
2008-05-27
Neuder, William P (Department: 3672)
Boring or penetrating the earth
Processes
Boring with specific fluid
C175S206000, C166S265000, C166S075120
Reexamination Certificate
active
07377336
ABSTRACT:
A modularly segmented apparatus for precise borehole pressure control, removing waste from borehole fluid, and recirculating the cleaned borehole fluid includes a pressure control section, a gas separator section, and a waste management section. In the pressure control section, a pressure manifold interconnects a plurality of chokes. A plurality of valves are used to direct the contaminated fluid through one of the chokes, which maintains a precise and predetermined pressure in the system. The manifold, chokes, and valves are mounted on a skid for easy transport. In the gas separator section, a gas separator is used to remove a majority of the gases present in the contaminated borehole fluid. In the waste management section, a vibratory separator removes large solid contaminants from the degassed fluid. The solids are directed to a solids collection container for further treatment or disposal. The fluid is directed to a first pit, which may be one partitioned are of a larger collection tank. Fluid from the first pit is directed to a degasser which removes additional gases in the fluid and directs the fluid to a second pit. Fluid from the second pit is directed to a desilter, which removes additional solids and directs the fluid to a third pit. The solids from the desilter are directed to the solids collection container. Fluid from the third pit is directed to active rig pumps for recirculation into the borehole.
REFERENCES:
patent: 5098584 (1992-03-01), Leen
patent: 6269880 (2001-08-01), Landry
patent: 7207399 (2007-04-01), Duhe et al.
Delahoussaye Paul
Duhe Jason
Gharst James
Simon, legal representative Stella
M-I L.L.C.
Neuder William P
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