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US 2019/0153783 A1Published application
Annular Pressure Reduction System for Horizontal Directional Drilling
AssigneeQuanta Associates, L.P.
InventorsRonald G. Halderman, Pablo Esteban Guerra, Karl D. Quackenbush
Life of this patent
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Abstract
Working an underground arcuate path around at least a portion of an obstacle with a casing extending into the underground arcuate path, connecting a rotating control device to the casing; and a Venturi device connected to the rotating control device.
Claims13
An apparatus for working an underground arcuate path around at least a portion of an obstacle, comprising:
- a casing extending into at least a lead portion of the underground arcuate path;
- a rotating control device connected to the casing;
- and
- a Venturi device connected to said rotating control device.
1 more element
A method for working an underground arcuate path around an obstacle, comprising the steps of:
- lowering an annular pressure within a space encircling a drill pipe;
- wherein said step of lowering the annular pressure within the space encircling the drill pipe is performed by sucking a volume of drilling fluid out of the space encircling the drill pipe.
Dependencies are inferred from the claim text.