Tool driving or impacting – Means to drive tool about an axis – Means to hold and relatively rotate sections of tool shaft
Patent
1988-02-08
1989-10-10
Yost, Frank T.
Tool driving or impacting
Means to drive tool about an axis
Means to hold and relatively rotate sections of tool shaft
277 82, E21B 300
Patent
active
048725170
ABSTRACT:
A non-rotating fluid conductor for use with well apparatuses. A top drive with such a conductor and methods of using such a conductor and such a top drive. The conductor in one embodiment has a tripartite gland with outer, central, and inner gland members. The central gland member is movable in response to externally applied fluid pressure to bring into communication one or more passages through the conductor which includes passages through the outer member and inner member which are brought into communication when a passage on the central member aligns with the passages of the inner and outer members. Appropriate configuration of and biasing of the central gland member provides non-contacting of the central and inner members unless the conductor is in an energized mode.
REFERENCES:
patent: 3695669 (1972-10-01), Langowski
patent: 4256313 (1980-04-01), Arnold
patent: 4449596 (1982-08-01), Boyadjieff
patent: 4529045 (1985-07-01), Boyadjieff et al.
patent: 4625977 (1986-12-01), Azibert et al.
Varco Top Drive Drilling System Description and Specifications Technical Bulletin, May 1985 (see pp. 22-24).
Torque-Right Top Drive Drilling System, 1986.
MacCline Billy
Shaw Daniel G.
Fridie, Jr. William
McClung Guy
Yost Frank T.
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