Crane-mounted drill and method for in-situ treatment of contaminated soil
First Claim
1. Apparatus for in-situ treatment of contaminated soil that includes:
- an elongated hollow drive shaft, means for rotating said shaft about its axis while supporting said shaft in desired orientation, means coupled to said shaft for selectively injecting fluid under pressure into said shaft, and drill means affixed to a lower end of said shaft for drilling a hole downwardly through soil;
characterized in that said drill means comprises;
a hollow sleeve mounted to said lower end of said shaft and extending therefrom coaxially with said shaft,a pair of drill blades cantilevered from said sleeve and extending radially outwardly therefrom diametrically opposite each other, said blades being of solid construction and identical uniform cross section and length,a plurality of radially spaced drill teeth oriented tangentially of said sleeve along one radial edge of each said blade, said teeth being angulated downwardly with respect to said sleeve,a hollow pipe affixed to each said blade extending along a radial edge of said blade opposite said one edge, each said pipe opening into said sleeve for receiving fluid from said sleeve and said shaft, anda plurality of nozzles consisting of radially spaced openings in each said pipe oriented tangentially of said sleeve oppositely of said teeth.
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Accused Products
Abstract
Apparatus for in-situ treatment of contaminated soil that includes an elongated hollow drive shaft mounted for rotation about its axis while being supported in vertical orientation. The upper end of the drive shaft is connected for selective injection of fluid under pressure into the shaft. A drill is affixed to the lower end of the shaft for drilling a hole downwardly through the soil. The drill comprises a hollow sleeve mounted to the lower end of the shaft and extending therefrom coaxially with the shaft. A pair of drill blades are cantilevered from the sleeve, and extend outwardly therefrom at right angles diametrically opposite to and aligned with each other. Each blade is of identical uniform cross section and carries a plurality of radially spaced drill teeth oriented tangentially of the sleeve along a leading radial edge of the blade. A hollow pipe extends along the trailing edge of each blade, and has orifices for injecting fluid from the sleeve and the pipe into the earth as the blade is rotated. A plate is affixed to each blade to deflect soil away from the nozzle orifices as the drill is rotated. A sensor is responsive to velocity of the drive shaft and drill, and cooperates with control electronics for injecting fluid into the earth as a predetermined function of velocity of the shaft.
128 Citations
30 Claims
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1. Apparatus for in-situ treatment of contaminated soil that includes:
- an elongated hollow drive shaft, means for rotating said shaft about its axis while supporting said shaft in desired orientation, means coupled to said shaft for selectively injecting fluid under pressure into said shaft, and drill means affixed to a lower end of said shaft for drilling a hole downwardly through soil;
characterized in that said drill means comprises;a hollow sleeve mounted to said lower end of said shaft and extending therefrom coaxially with said shaft, a pair of drill blades cantilevered from said sleeve and extending radially outwardly therefrom diametrically opposite each other, said blades being of solid construction and identical uniform cross section and length, a plurality of radially spaced drill teeth oriented tangentially of said sleeve along one radial edge of each said blade, said teeth being angulated downwardly with respect to said sleeve, a hollow pipe affixed to each said blade extending along a radial edge of said blade opposite said one edge, each said pipe opening into said sleeve for receiving fluid from said sleeve and said shaft, and a plurality of nozzles consisting of radially spaced openings in each said pipe oriented tangentially of said sleeve oppositely of said teeth. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- an elongated hollow drive shaft, means for rotating said shaft about its axis while supporting said shaft in desired orientation, means coupled to said shaft for selectively injecting fluid under pressure into said shaft, and drill means affixed to a lower end of said shaft for drilling a hole downwardly through soil;
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12. Apparatus for in-situ treatment of contaminated soil that includes:
- an elongated hollow drive shaft, means for rotating said shaft about its axis while supporting said shaft in desired orientation, means coupled to said shaft for selectively injecting fluid under pressure into said shaft, drill means affixed to a lower end of said shaft for drilling a hole downwardly through the soil, and nozzle means on said drill means coupled to said shaft for injecting fluid from said shaft into the soil;
characterized in that said fluid-injecting means comprises;first sensing means coupled to said shaft for providing a first electrical signal as a function of velocity of said shaft, valve means responsive to an electronic control signal for controlling flow of fluid to said shaft, and electronic control means responsive to said first electrical signal for providing said control signal so as to control injection of fluid into said drive shaft as a predetermined function of velocity of said shaft so as to achieve substantially uniform injection per unit of volume of drilled soil. - View Dependent Claims (13, 14, 15, 16, 17)
- an elongated hollow drive shaft, means for rotating said shaft about its axis while supporting said shaft in desired orientation, means coupled to said shaft for selectively injecting fluid under pressure into said shaft, drill means affixed to a lower end of said shaft for drilling a hole downwardly through the soil, and nozzle means on said drill means coupled to said shaft for injecting fluid from said shaft into the soil;
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18. A method for in-situ treatment of contaminated soil that includes the steps of:
- (a) rotating a drill bit about its axis into the soil, and (b) injecting soil treatment fluid into the soil through the drill bit as the drill bit is rotating;
characterized in that said step (b) comprises the steps of;(c) measuring axial velocity of said drill bit within the soil, and (d) controlling rate of fluid injection as a function of such axial velocity so as to achieve substantially uniform fluid injection per unit volume of drilled soil. - View Dependent Claims (19, 20)
- (a) rotating a drill bit about its axis into the soil, and (b) injecting soil treatment fluid into the soil through the drill bit as the drill bit is rotating;
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21. Apparatus for in-situ treatment of contaminated soil that includes:
- an elongated hollow drive shaft, means for rotating said shaft about its axis while supporting said shaft in desired orientation, means coupled to said shaft for selectively injecting fluid under pressure into said shaft, and drill means affixed to a lower end of said shaft for drilling a hole downwardly through soil;
characterized in that said drill means comprises;a hollow sleeve mounted to said lower end of said shaft and extending therefrom coaxially with said shaft, a pair of drill blades cantilevered from said sleeve and extending radially outwardly therefrom diametrically opposite each other, said blades being of identical uniform cross-section and length, a plurality of radially spaced drill teeth oriented tangentially of said sleeve along one radial edge of each said blade, said teeth being angulated downwardly with respect to said sleeve, a hollow pipe on each said blade extending along a radial edge of said blade opposite said one edge, each said pipe opening into said sleeve for receiving fluid from said sleeve and said shaft, and a plurality of nozzle means on each said pipe opening tangentially of said sleeve oppositely of said teeth, said pluralities of nozzle means being identically oriented and positioned on each said pipe, said nozzle means being positioned at non-uniform radial spacing on each said pipe spaced from each other by decreasing distances radially outwardly of each said pipe. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
- an elongated hollow drive shaft, means for rotating said shaft about its axis while supporting said shaft in desired orientation, means coupled to said shaft for selectively injecting fluid under pressure into said shaft, and drill means affixed to a lower end of said shaft for drilling a hole downwardly through soil;
Specification