Abbreviation: shut-in casing pressure

The appearance of oil or gas n cuttings, samples, or cores from a drilling well

Pressure at the top of a well when it is shut in.

A vibrating screen used to remove cuttings from the circulating fluid in rotary drilling operations.

The size of the openings in the screen should be carefully selected to be the smallest size possible that will allow 100 percent flow of the fluid.

Also called a shaker.

The component in a blowout preventer that cuts, or shears, through drill pipe and forms a seal against well pressure.

Shear rams are used in floating offshore drilling operations to provide a quick method of moving the rig away from the hole when there is no time to trip the drill stem out of the hole.

See gel strength

The displacing of wellbore fluids from the annulus up the tubing

To close values on a well so that it stops producing; said of a well on which the valves are closed.

A grooved pulley.

The pressure at the bottom of a well when the surface valves on the well are completely closed.

It is caused by formation fluids at the bottom of the well.

A cylindrical or spherical vessel used to isolate the components in mixed streams of fluids.

See oil and gas separator.

A tool used to set drillable or permanent tools, such as packers, retainers, plugs; can be mechanical, electric, or hydraulic.

The formation of stable calcium, magnesium, iron complex by treating water or mud with certain complex phosphates.

To spin a sample of oil at high speed to determine its bs&w content.

A device that detects vibrations in the earth.

It is used in studying the earth’s interior and in prospecting for probably oil-bearing structures.

Vibrations are created by discharging explosive in shallow boreholes, by striking the surface with a heavy blow, or by vibrating a heavy plate in contact with the ground.

The type and velocity of the vibrations are recorded by the seismograph indicate the general characteristics of the section of earth through which the vibrations pass.