A long flat-bed semi-trailer.

See floating offshore drilling rig.

A special coupling device inserted one or two joints above the bottom of the casing string that contains a check valve to permit fluid to pass downward but not upward through the casing.

The float collar prevents drilling mud from entering the casing while it is being lowered, allowing the casing to float during its descent and thus decreasing the load on the derrick or mat.

A float collar also prevents backflow of cement during a cementing operation.

1.

A piece of cloth, rope or nylon strand used to mark the wireline when swabbing or bailing.

2.

An indicator of wind direction used during drilling or workover operations where hydrogen sulfide (sour) gas may be encountered.

3.

In swabbing or bailing, to attach a piece of cloth to the wireline to enable the operator to estimate the position of the swab or bailer in the well.

The coagulation of solids in a drilling fluid, produced by special additives or by contaminants.

When the opposite occurs of what is intended in a drilling fluid.

In an invert water-in-oil emulsion, the emulsion is said to be flipped when the continuous and dispersed phases reverse.

1.

To finish a job.

2.

To use flanges to make final connections on a piping system.

Porous unsized paper for filtering liquids.

Api filtration test specifies one thickness of 9-cm filter paper whatman no.

50, s & s no.

576, or equivalent.

A phenomenon that often occurs in an injection project in which the fluid being injected does not contact the entire reservoir but bypasses sections of the reservoir fluids in a finger-like manner.

Fingering is not desirable, because portions of the reservoir are not contacted by the injection fluid.

A break in subsurface strata.

Often strata on one side of the fault line have been displaced (upward, downward, or laterally) relative to their original positions.

A device placed on a piece of equipment that is lowered into a wellbore so that the equipment may be retrieved by wire line.

1.

A fluid that has been passed through a filter.

2.

The liquid portion of drilling mud that is forced into porous and permeable formations next to the borehole.

See fishing string.

A device used in the testing of filtration properties of drilling mud.

See mud.

An installation designed for one or more specific and limited extraction units, scrubbers, absorbers, drip points, conventional single or multiple stage separation units, ltx low temperature separators, and other types of separation and recovery equipment.