Patent ID: 6142406
Filing Date: 2000-11-07
Classification: B21C,B65H,E21B

Abstract:
A method for controlling an arch portion of coiled tubing above an injector for injecting the coiled tubing into a bore, the method comprisingmonitoring height of the arch portion of the coiled tubing with monitor apparatus that produces a signal indicative of said height,sending said signal to arch maintenance apparatus,maintaining position of the arch portion with the arch maintenance apparatus using said signal indicative of said height,wherein the monitor apparatus includes a supported roller mechanism movable by the arch portion and positioned about the arch portion, the roller mechanism on a structural member that itself moves with respect to a support member having a plurality of actuatable electronic devices spaced-apart, a portion of the structural member activating a particular one of the plurality of actuatable electronic devices adjacent thereto, a signal sendable from said particular actuatable electronic device indicative of height of said device which is corresponds to a height of the arch portion, said method further comprisingcontrolling height of the arch portion with said arch maintenance apparatus based on the signal from the particular actuatable electronic device.