Hydrojet drilling means

Details Hydrojet drilling means Hydrojet drilling means

1982-09-20

1984-07-10

Leppink, James A.

Boring or penetrating the earth

Automatic control

Of fluid pressure below ground

175 67, 166242, E21B 1060

Patent

active

044587660

ABSTRACT:
Hydrojet drilling means and method are presented. The method varies the angle and direction from which fluid contacts the material to be cut. The variation in angle and direction also causes the fluid to be applied to selected points and then repeatedly reapplied from different angles and directions getting the advantages of pulsed hydrojet cutting. As a result, 10,000 psi fluid streams cut as well in certain strata as prior art 50,000 psi hydrojets. The means comprises a recyclable fluid supply, means to clean the fluid stream, stringer means which may comprises as little as a cable with the associated fluid flow and power flow lines, a down hole pressure intensification means, and a drill head disposed about an axis formed by the stringer having at least three orifices disposed at equal angles about the axis. In operation, the drill head both rotates and is swung in a complex three dimensional selected series of pendulum-like arcs as the drill head is lowered. Cuttings are removed by prior art mucking means.

REFERENCES:
patent: 3547191 (1970-12-01), Malott
patent: 3844362 (1974-10-01), Elbert et al.
Brook et al., First International Symposium on Jet Cutting Technology, 5th-7th, Apr. 1972, Paper B1 and B9.
Summers et al., Third International Symposium on Jet Cutting Technology, 11th-13th, May 1976, Chicago, USA, Paper E2.

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