Page 485 - Practical Well Planning and Drilling Manual

Appendix NEW! revised 11/00/bc 1/30/01 3:30 PM Page 461

[ ]
Glossary

form a salt. In water analysis, it represents the carbonates, bicarbon-
ates, hydroxides and occasionally the borates, silicates and phos-
phates in the water. It is determined by titration with standard acid
to certain datum points.

Analysis, of Mud or Drilling Fluid. Examination and testing of
the drilling fluid to determine its physical and chemical properties
and condition.

Anchor, Deadline. Means of holding the deadline to the derrick
or substructure. Usually this is the primary element of the weight
indicator.

Annular Velocity. The velocity of a fluid moving in the annulus.
Usually expressed in feet per minute (fpm).

Annulus, or Annular Space. The space between a pipe and a hole.
The space between drillstring and hole or casing is an Annulus.

Apparent Viscosity. The viscosity a fluid appears to have on a given
instrument at a stated rate of shear. It is a function of the plastic vis-
cosity and the yield point. The apparent viscosity in centipoises, as
determined by the direct-indicating viscometer, is equal to the 600
rpm reading. In a newtonian fluid, the apparent viscosity is numeri-
cally equal to the plastic viscosity.

Array Induction Imager Tool. Schlumberger wireline tool that gives
a resistivity image of the formation. Can give resistivity logs with
vertical resolutions of 1 ft in smooth boreholes, also true resistivity,
detailed description of invasion resistivity, Hydrocarbon saturation
and imaging.

Array Seismic Imager. Schlumberger wireline tool designed to
acquire multilevel triaxial seismic data in cased holes. Provides high
quality seismic images in relatively close proximity to the wellbore.

Array Sonic. Wireline logging tool.

461