Boring or penetrating the earth – With above-ground means for handling drilling fluid or cutting – With tool shaft having plural passages for drilling fluid
Patent
1987-07-30
1989-06-06
Neuder, William P.
Boring or penetrating the earth
With above-ground means for handling drilling fluid or cutting
With tool shaft having plural passages for drilling fluid
175320, E21B 1702, E21B 1718
Patent
active
048363057
ABSTRACT:
An improved drill pipe utilizing multi-conduit tubulars is provided. A seal subassembly (644) is constructed and arranged so as to receive a plurality of similar tubular conduits (626, 630). The similar tubular conduits (626, 630) are inserted into both ends of the seal subassembly (644). At one end, the tubular conduits (630) are threadably attached to the seal subassembly (644), while at the opposite end, the tubular conduits (626) are slidably attached to the seal subassembly (644). T-rings seals (674) are provided to insure sealing engagement of the tubular conduits to the seal subassembly (644). A collar (638) is provided to join a drill pipe (596) to one end of the seal subassembly (644). A lift subassembly (682) is provided to attach the other end of the seal subassembly (644) to another drill pipe (598). The seal subassembly (644) is constructed so as to allow the tubular conduits to be of strength sufficient to withstand pressure and compression forces only. Tension and torsional forces are handled entirely by the drill pipe outer casings (614, 616), the collar (638), the seal subassembly (644), and the lift subassembly (682).
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Neuder William P.
Pangaea Enterprises, Inc.
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