Abstract: A multi-conduit tubular having fluid conduits (30) and electrical conduits (108), with associated surface fluid (182) and electrical (186) commutators, and downhole sensors (18, 20, 290) for providing surface monitors (22) with instantaneous formation data. Each tubular (50) includes a plurality of uniform linear conduits (30) therethrough, with a gasketed seal plate (86) interposed between joined tubulars for assuring a high pressure seal between joined conduits. The seal plate (86) includes an intermediate electrical connector (126) for connecting electrical conduit connectors (116) of one tubular to another. A coupling collar (84) with uniform diameter internal coarse and fine threads (92, 94) joins the tubular ends having similar threads by differential thread action without respective tubular rotation.

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.

Abstract: A multi-conduit tubular having fluid conduits (30) and electrical conduits (108), with associated surface fluid (182) and electrical (186) commutators, and downhole sensors (18, 20, 290) for providing surface monitors (22) with instantaneous formation data. Each tubular (50) includes a plurality of uniform linear conduits (30) therethrough, with a gasketed seal plate (86) interposed between joined tubulars for assuring a high pressure seal between joined conduits. The seal plate (86) includes an intermediate electrical connector (126) for connecting electrical conduit connectors (116) of one tubular to another. A coupling collar (84) with uniform diameter internal coarse and fine threads (92, 94) joins the tubular ends having similar threads by differential thread action without respective tubular rotation.