Drill pipe and corresponding drill fitting

摘要

A drillpipe for a drill stem to drill a hole. The drill stem includes a drill string and a bottom hole assembly. The drillpipe includes a first end having a first inertia, a second end having a second inertia, a first intermediate zone adjacent to the first end, a second intermediate zone adjacent to the second end, and a central substantially tubular zone with an external diameter smaller than the maximum external diameter of at least the first or the second end. A casing is fixed on the pipe over a portion of the external surface thereof, at least one physical parameter sensor is disposed in the casing, and at least one data transmission/storage mechanism is connected to the sensor output, the casing being disposed at a distance from the first and second ends, the casing being integral with the central zone at a distance from the first and second intermediate zones and having a smaller inertia than the first and second inertias.

主权项

1. A drillpipe for a drill stem to drill a hole, the drill stem including a drill string and a bottom hole assembly, the drillpipe comprising:
a first end comprising a female threading and having a first inertia; a second end comprising a male threading and having a second inertia; a first intermediate zone adjacent to the first end and having a third inertia; a second intermediate zone adjacent to the second end and having a fourth inertia; a central substantially tubular zone with an external diameter which is smaller than the maximum external diameter of at least the first or the second end and having a fifth inertia, the third and fourth inertias each being smaller than the first and second inertias and the fifth inertia being smaller than the third and fourth inertias; a casing fixed on the pipe over a portion of the external surface of the pipe; at least one physical parameter sensor disposed in the casing; and at least one data transmission or storage device connected to the sensor output; the casing being disposed at a distance from the first and second ends, and the casing being integral with the central zone at a distance from the first and second intermediate zones and having a smaller inertia than the first and second inertias.