A special drill stem valve that, when in open position, allows fluid to flow through it, thus allowing the valve to be stabbed into the drill stem.

A measurement of load safety for wire rope obtained by using the following formula: safety factor – b/w where:
b=nominal catalog breaking strength of the wire rope, and
w = calculated total static load.

Also called design factor.

See surfactant.

A remedial well-servicing activity whereby a cement slurry is pumped into open perfs, split casing, etc., to effect a blockage.

See sodium carbonate

1.

An abrasive material composed of small quartz grains formed from the disintegration of preexisting rocks.

Sand consists of particles less than 2 millimeters and greater than 1/16 millimeter in diameter.

2.

Sandstone.

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

A drillable service packer, a retainer.

A recovery improvement process such as water flooding or gas flooding.

Abbr.

Synthetic oil based mud.

The joint of drill pipe that is used in hang-off operations so that no tool joint is opposite a set of preventer rams.

A rapid increase in n pressure downhole that occurs when the drill stem is lowered too fast or when the mud pump is brought up to speed after starting.

A rubber or rubber-like device on a special rod (a swab), which forms a seal between the swab and the wall of the tubing or casing.

A device employed with a packer to surge, or clean, open perforations; also called surge disk.

The flux of fluids and solids that occurs in the initial stages of any filtration before pore openings are bridged and a filter cake is formed.

Also called spurt loss.