Boring or penetrating the earth – With means movable relative to tool to receive – retain – or...
Patent
1980-03-13
1981-11-17
Leppink, James A.
Boring or penetrating the earth
With means movable relative to tool to receive, retain, or...
E21B 920, E21B 2500
Patent
active
043006434
ABSTRACT:
A double core barrel for carrying out boring and arc drilling in oilfields comprises a rotary outer tube 1 with a boring bit 3 and a non-rotary inner tube 2, with an extractor cone 9, screwed onto the lower non-rotary portion of a pivoting means 11 whose upper rotary position 12 is screwed into a tapped body 4 of the outer tube 1. The upper end 15 of the portion 12 cooperates with an adjustment spanner 16 which transmits a rotation couple to the upper end, to allow adjustment of the spacing for the passage of water between the bit 3 and the cone 9. The upper end 15 has an external longitudinal groove, while the tapped body has a slot 8 at the base of a smooth cylindrical bore 6 and at the level of the longitudinal groove 17. The upper end 15 receives a locking cap 18 having a lower catch 20 and being designed to cooperate with an adjustment spanner 16 to transmit a rotation couple to the catch 20 and being designed to slide between the upper end 15 and the bore 6 so that the catch 20 may first be engaged in the groove 17 and then simultaneously in this groove 17 and in the slot 8 so that the cap 18 then locks the portion 12 and the body 4 to prevent their relative rotation.
REFERENCES:
patent: 997358 (1911-07-01), Ameling
patent: 2189057 (1940-02-01), Copelin
patent: 2357907 (1944-09-01), Phillips
patent: 2621897 (1952-12-01), Brown
patent: 3215210 (1965-11-01), Dickinson
patent: 3504750 (1970-04-01), Tiraspolsky et al.
patent: 3986555 (1976-10-01), Robertson
Diamant Boart
Leppink James A.
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