The capacity of drill string is an essential issue in oil well control.

The drill string is pushed against one side of the well bore.

This is the area where the drill string begins its trip into the earth.

A stuck drill string can be caused by many situations.

It has a passage through the coupling for the drill string.

"We're going to lower the drill string right into the hole.

If the additive(s) will not go through the drill string, they cannot be used.

You build the rig, prepare the drill string and start digging.

God knows, in his life he wrapped enough chain around drilling strings."

The drill string extends down to the ocean floor through a moon hole.

"The drill string's following a kind of soft area in the rock," Tex told us.

Including its tower, the entire drill string had just reached a length of 470 meters.

If not, the bit, drill string and mud motors would fail more rapidly.

The drill string is typically made up of three sections:

Then, the drill string is again removed so surface casing can be installed.

The rotation of the drill string helps to orient the tool face.

This information is transmitted through the wire-line fitted within the drill string.

The topdrive, which spins the drill string, has acted up twice.

"You know, you can't turn a drill string more than a few kilometers long.

If a blowout begins, the drill string is stopped.

In tests the drill string was lowered as much as 500 feet into the holes.

Center and hang off the drill string in the wellbore;

In short the longer the gap between the near bit and the drill string stabilizer the greater the angle building rate.

Drilling continues with the addition of rods to the top of the drill string.

Drill pipe is a portion of the overall drill string.