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Drill Pipe 101

There are four grades of pipe: E, X, G and S

E people used in the old days. E and X is good for sour gas with down-hole drilling. But now-a-days they use mostly G. They still use a lot of X. S is not good for sour gas at all.

The common sizes are 2 7/8, 3 1/2, 4", 4 1/2", 5" and 6 5/8" drill pipe. The most common sizes used today are 4", 4 1/2" and 5".

Make-and-break pipe has already been mated to another pipe repeatedly. So when it goes to the rig they don't have to do that. It takes time to make a connection because it's tight. It saves rig time because you have to do it right or it'll mess up the threads.

Double White - it's premium used pipe with 0 to 20% of pipe wall reduction. This measure

Types of Connections:

The connections on the pipe has different torque measurements and tapers based on the size of the pipe.

IF ( internal flush joint ) are most common for 3 1/2, 2 7/8", 6 5/8" pipes

XO ( 4 1/2" )

FH ( full-hole )


Standard is 7" pins, 8 to 10" boxes. New is 9" pins and 12" boxes. They make it longer to get more life out of the pipe. After you work with a pipe so long, the pins get shorter. With 2" pins, the pipe may still be good put it's not usable.

Box is the female end of the pipe. The pins are the male end of the pipe.

Drill Collars

4 3/4, 6", 6 1/4", 6 1/2", 8"

Spiral or Slick = spiral has threads. Spiral keeps you from sticking your pipe in the hole. When your pipe is 3 miles deep in the earth, the earth has got a lot of suction. If you have that spiral on it, the pipe won't stick to the wall. Engineers say it works. Lots of people way it works, but others don't have a preference. But what we agree on is that when a pipe gets stuck in a hole you got to pull out everything and do a re-entry, which costs a lotta money.