What is the load on the rig while pulling out the drill string for connection?
The load on the rig while pulling out the drill string for connection is approximately 38,940.0781 pounds.
Calculating the Load on the Rig
To calculate the load on the rig while pulling out the drill string for connection, we need to consider the weight of the drill string components. Here's how you can calculate it:
Calculate the weight of the drill pipe:
Drill pipe length: 9,800 ft
Drill pipe weight per foot: 3.5 lb/ft
Total drill pipe weight: 9,800 ft * 3.5 lb/ft = 34,300 lb
Calculate the weight of the drill collar:
Drill collar length: 6.25 ft
Drill collar weight per foot: 13/16 lb/ft (0.8125 lb/ft)
Total drill collar weight: 6.25 ft * 0.8125 lb/ft = 5.0781 lb
Calculate the weight of the BHA (Bottom Hole Assembly):
BHA weight = Drill pipe weight + Drill collar weight
BHA weight = 34,300 lb + 5.0781 lb = 34,305.0781 lb
Calculate the load on the rig:
Load on the rig = BHA weight + Weight of the drill string in the hole
Weight of the drill string in the hole = Hole length * Pressure gradient
Weight of the drill string in the hole = 10,300 ft * 0.45 psi/ft = 4,635 lb
Load on the rig = 34,305.0781 lb + 4,635 lb = 38,940.0781 lb
Therefore, the load on the rig while pulling out the drill string for connection is approximately 38,940.0781 pounds.