Same as an eight round, except ten threads per inch.

A person who tests pipe and casing for leaks

A device to which a guy wire or brace may be attached, such as the anchoring device for the deadline of a hoisting-block arrangement.

A petroleum- or water-bearing formation of relatively low porosity and permeability.

To add oil to a system, which causes the oil to break out and rise to the surface.

Any equipment designed to be pumped down a completed well to effect a repair, modify the well’s flow, or for other reasons.

Drill pipe, tubing, sucker rods, and so forth with the diameter near the top of the well larger than the diameter below.

To measure and record length of pipe of tubing

A tap with a gradually decreasing diameter from the top.

It is used to retrieve a hollow fish such as a drill collar and is the male counterpart of a die collar.

The taper tap is run into a hollow fish and rotated to cut enough threads to provide a finn grip and permit the fish to be pulled and recovered.

See tap.

Compare die collar.

To begin to pull on a load.

Abbreviation: tubing conveyed perforator.

Abbreviation: total depth

The active ingredient of quebracho and quebracho substitutes, such as mangrove bark, chestnut extract, and hemlock.

A group of production tanks located in a field to store crude oil.

A bull plug or blind flange at the end of a tee to prevent erosion at a point where change in flow direction occurs.