A clamp used to hold the rod string in pumping position when the well is in the final stages of being put back on the pump.

See steam drive

In well-control operations, closing the bop’s with the choke and hcr, or fail-safe, valves open.

Compare hard shut-in.

A sheave or pulley that can be opened up for putting a line over the roller or sheave.

A singular component of an entire slip system

A valve in the bottom of a retainer.

See wireline.

To have rigged up wire rope and sheaves or blocks for hoisting.

1.

To explode nitroglycerine or other high explosives in a hole to shatter the rock and increase the flow of oil, now largely replaced by formation fracturing.

2.

In seismographic work, to discharge explosives to create vibrations in the earth’s cruse.

See seismograph.

A displacement.

In the reservoir a sweep is displacement of a hydrocarbon fluid from a reservoir rock by a flooding fluid.

In the wellbore, a sweep is a viscous pill circulated around to help clear the wellbore of cuttings or debris.

The condition of containing more solute in solution than would normally be present at the existing temperature.

Atmospheric pressure of 14.696 psi and temperature of 60f (16c).

A compression-set packer

A tool used to straighten damaged or collapsed casing in a well.

A substance, usually liquid, in which another substance (the solute) dissolves.

The connected joints of pipe racked in the derrick or mast during a trip.

The usual stand is about 90 feet long (about 27 meters), which is three lengths of drill pipe screwed together (a thribble).