Boring or penetrating the earth – Below-ground impact members – With releasable means to detachably retain telescoping...
Patent
1976-06-28
1977-12-06
Werner, Frank E.
Boring or penetrating the earth
Below-ground impact members
With releasable means to detachably retain telescoping...
175 85, 214 1P, E21B 1914
Patent
active
040612333
ABSTRACT:
A drilling rig mounted on a bore inclined to the vertical in which transfer of drill strings from a store to the bore is effected on the low side of the rig.
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patent: 3265138 (1966-08-01), Alexander et al.
patent: 3443647 (1969-05-01), Jenkins et al.
patent: 3539024 (1970-11-01), Irons et al.
patent: 3650339 (1972-03-01), Selfe et al.
patent: 3937334 (1976-02-01), Bleyl et al.
patent: 3961673 (1976-06-01), Wolters et al.
Laubscher Lawrence E.
Werner Frank E.
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