COILED TUBING INJECTOR WITH LOAD SENSING TUBING GUIDE

摘要

The invention pertains to methods and apparatus for monitoring loads on an arched tubing guide of a coiled tubing injector caused by tension on coiled tubing. The load is sensed by a load sensor, for example, a load cell placed in a strut that supports the arched tubing guide, or in a load pin or load cell placed within the structure arched tubing guide or the connection of the arched tubing guide to a frame for the coiled tubing injector, at a location where the load is representative of the load placed on an arched tubing guide by tension in the coiled tubing. The load sensor generates a feedback signal. The load is monitored, either by an operator or a controller, and torque applied to a reel around which the tubing is wound is adjusted to avoid, or in response to, excessive loads on the arched tubing guide.

主权项

1. A coiled tubing injector comprising:
an injector head, the injector head comprising a plurality of chains, each of which is comprised of a continuous loop and carries a plurality of grippers, the plurality of chains being arranged for gripping tubing placed between the plurality of chains; a frame within which the injector head is mounted; an arched tubing guide having a proximal end coupled with the frame and a distal end extending outwardly from the frame; and one or more load sensors positioned for measuring load on the arched tubing guide when coiled tubing passes over the arched tubing guide under tension, each of the one or more load sensors transmitting a signal indicative of the load on the arched tubing guide.