Boring or penetrating the earth – Processes
Reexamination Certificate
1999-11-02
2001-11-13
Tsay, Frank (Department: 3672)
Boring or penetrating the earth
Processes
C175S092000, C173S073000
Reexamination Certificate
active
06315063
ABSTRACT:
TECHNICAL FIELD
The present invention relates to an improved downhole reciprocating rotary fluid powered drilling motor for use on rotating and non-rotating drill strings in oil well work-over servicing and open hole oil well earth boring to improve drilling effectiveness and increase drill bit penetration rates.
BACKGROUND OF THE INVENTION
This application is for an invention previously described in my Disclosure Document No. 449,617 entitled “RECIPROCATING DRILLING MOTOR” filed Jan. 11, 1999 in the United States Patent and Trademark Office under the Disclosure Document Program (MPEP 1706).
Because of various oil well conditions, variable drilling applications, diverse drilling mediums, various drilling rig configurations, and rig operator preferences considerable research, development, time, effort and cost have been applied to perfect a reciprocating rotary drilling motor of the nature described herein. Certain levels of success have been achieved over the ensuing years and progress is continuing to this day as all factors concerned, tried, tested and incorporated contributed to the present invention.
SUMMARY OF THE INVENTION
Because of the aforementioned variables a broad range of tool operations is needed to accommodate most well service and open hole drilling conditions, and great improvements in drill penetration rates have been achieved in all drillable media.
The present invention provides for faster drilling in oilfield applications but can also be used in drilling water wells, geophysical bore holes, environmental test holes, quarry blast holes, construction pier holes and the like. In order to increase the drill bit penetration rate, this invention provides a rotary automatic pressure fluid driven periodic fast cycling forcing function motor wherein the drill bit is alternately thrust forward by pressure fluid impulse and then hammered forward by percussive impact with sustained high frequency energy delivery to the medium being drilled.
REFERENCES:
patent: 3602317 (1971-08-01), Scroggins
patent: 3612191 (1971-10-01), Martini
patent: 3735820 (1973-05-01), Currington
patent: 3899033 (1975-08-01), VanHuisen
patent: 3946819 (1976-03-01), Hipp
patent: 4846288 (1989-07-01), Hunt
Griggs Dennis T.
Tsay Frank
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