E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 44/02 (2006.01) E21B 19/08 (2006.01) E21B 23/00 (2006.01)
Patent
CA 2639345
The present invention is directed to methods for controlling the operations of a well service rig at a well site by evaluating load sensor data obtained from sensors on or associated with the well service rig. A rig load data chart can be reviewed and an average rig load can be determined for each pull of tubing or rods from a well. The average rig load can be used to calculate and set a rig overload level. If the rig load sensor reads a rig load at or above the rig overload level, the clutch for the hoist can be disengaged and the brake applied to prevent the load from either damaging the rig or breaking off the tubing or rods in the well. In addition, the rig load can be evaluated to determine when the limit the block speed when pulling rods or tubing.
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Key Energy Services Inc.
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