Importance

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Abstract

A sensing system mounted to a mechanical drill pipe swivel of the type which is mounted on a rig housing to a section of drill pipe. The swivel would include an enlarged body portion for securing to a section of drill pipe. There would be provided a first upper circular collar positionable around the outer surface of the swivel, the collar having a first and second halves hinged at a common edge, so that the collar may move to a first open position to be engaged around the body of the swivel and moved to a second closed position to be locked in place around the swivel body. The collar would include an arm member extending from the collar wall on a first end, to a position so that the second end of the arm member is in line with a portion of the drill pipe to which the swivel is engaged. The second end of the arm member would include first and second sensors positioned facing the section of drill pipe. The section of drill pipe would further include a second lower collar, again having first and second half portions and hinged at a common edge so that the second collar could be placed in a first open position around the surface of the drill pipe and moved to a second closed position to be locked in place. The second collar would include a plurality of two types of sensors which would be positioned at specific points along the wall of the collar. As the drill pipe rotated, there would be a first set of sensors aligned with one of the sensors on the arm member for sensing the direction of the rotation, and a second set of sensors aligned with the second sensor on the arm member for sensing the number of revolutions of the drill pipe as it turned in a 360 degree turn.

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First Claim