Rotating drilling head drive

Details Rotating drilling head drive Rotating drilling head drive

2004-12-13

2008-05-27

Thompson, Kenneth (Department: 3672)

Boring or penetrating the earth

Processes

C175S195000, C166S078100, C166S084300

Reexamination Certificate

active

07377334

ABSTRACT:
Methods and apparatus for rotating a stripper assembly in use with a rotating drilling head. A drive system is disposed external to the rotating drilling head and generates rotational motion to match the rotation of a drillstring running through the rotating drilling head. A connection transfers rotational motion from the drive system to the stripper assembly. In one embodiment, the drive system comprises a housing disposed about the drillstring and a one or more contact members connected to said housing and operable to contact the drillstring. One or more biasing members urge the contact members into contact with the drillstring so as to transfer rotational motion from the drillstring to the housing.

REFERENCES:
patent: 2333847 (1943-11-01), Deely
patent: 2559100 (1951-07-01), White
patent: 2731281 (1956-01-01), Knox
patent: 2904357 (1959-09-01), Knox
patent: 4304310 (1981-12-01), Garrett
patent: 5647444 (1997-07-01), Williams

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