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Oil Authority›Glossary›B›Bit Sub

Bit Sub — Oil & Gas Glossary

Drilling Equipment

A crossover sub inserted between the drill collar and the bit.

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Related Terms

A-Leg

Two large support legs that when standing form a steel A-frame structure that supports the derrick; provides support fra

Air Compressor

A machine that takes air, compresses it, and stores it in a tank for distribution to air-driven rig equipment.

Air Hoist

A compressed air powered winch-like device, usually mounted on the rig floor, used to lift heavy objects or tubulars to

Bale Eyes

The end of the bale bars that form an enclosed eye.

Bales

Long, heavy steel bars with an eye on each end connecting traveling blocks to elevators.

Birdbath

The vertical storage area in the derrick for tubular stands, with rows of mounting pegs for each stand referred to as al

Boiler

A closed vessel in which water or other fluid is heated for various processes.

Bolt Pins

Bolts placed through a pin that prevents the pin from sliding out of the hole.

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