A joint of drill pipe.

Compare double, thribble, and fourable.

See caving

A well-servicing unit whose mast consists of but one steel tube, usually about 65 feet long.

Used to describe packers with one slip system for supporting weight and pressure from above only.

A mast on a well servicing unit that utilizes a split traveling block and crown block, which makes it possible to pull 60-foot stands with a 50-foot mast.

A wire-rope loop for use in lifting heavy equipment.

Drilling in which the size of the hole is smaller than the conventional hole diameter for a given depth.

This decrease in hole size enables the operator to run smaller casing, thereby lessening the cost of completion.

See miniaturized completion.

A device in a rotary table or other tool into which tubing, drill pipe, or slips can be inserted.

A low platform mounted on the bottom of equipment for ease of moving, hauling, or storing.

A relatively small container of high explosive that is loaded into a perforating gun.

On detonation, the charge releases a small, high-velocity stream of particles (a jet) that penetrates the casing, cement, and formation.

See perforating gun.

An instrument used to measure the shear strength, or gel strength, of a drilling fluid.

See gel strength

1.

A charge of high explosive, usually nitroglycerine, detonated in a well to shatter the formation and expedite the recovery of oil.

Shooting has been almost completely replaced by formation fracturing and acid treatments.

2.

A point at which a photograph is made in a single-shot survey.

See directional survey.

A long narrow shovel used in ditch digging.

Pressure of the annular fluid on the casing at the surface when a well is shut in

A bottomhole pressure test that measures pressure after the well has been shut in for a specified period of time.

See bottomhole pressure test.