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US 8,011,449 B2Granted
Method and apparatus for directional drilling
OwnerRaymond G. Roth, Rodger Lakinginventors
Life of this patent
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Abstract
The present invention is directed at a pullhead/reamer for use in digging a hole in the ground; comprising a first end (22) shaped to receive a mandrel struts, connecting the first end to the second end, the struts defining a set of open flutes (48) therewithin; and a set of slurry jets (50); wherein when the pullhead/reamer is in use, the set of slurry jets release a pressurized liquid to mix with the ground producing a slurry which enters the pullhead/reamer via the open flutes.
Claims5
A method of directional drilling to produce an underground hole for laying of a pipe comprising:
- rotating a pullhead to displace mud to produce said underground hole;
- mixing said mud with a drilling fluid to create a slurry;
- and
- guiding a portion of said slurry directly through the pullhead to an interior of said pipe causing said slurry to travel along said interior of said pipe to an opposite end of said pipe.
1 more element
Dependencies are inferred from the claim text.