Acronyms

AC		alternating current
ADP		aluminum drillpipe
AHP		abnormal high pressure
ASME		American Society of Mechanical Engineers
BHA		bottomhole assembly
CCS		complete coring system
CDR		commercial rate of drilling, meter per rig-month (overall drilling rate)
CIS		Commonwealth Independent States
CT(D)		coiled tubing (drilling) system
DC		direct current (electric motor)
DHM		downhole motor
DOE		U.S. Department of Energy
DP		Drillpipe
DPS		dynamic positioning system
DRC		drillcollar
DS		Drillstring
D/S		drill ship
DT		deflecting tool
DWPP		drill without pulling out the pipe
EDM		electric downhole motor (electrodrill)
EKTB		Experimental Turbine Drilling Bureau
EM		electromagnetic (signal)
EOR		enhanced oil recovery
ESP		electric submersible pump
ERD		extended reach drilling
ERW		extended reach well
EUR		expandable underreamer
FPH		foot per hour
FSU		former Soviet Union countries
GKNT		State Committee on Sciences and Technology of the U.S.S.R.
GOSPLAN		State Planning Committee of the U.S.S.R.
GOST		State standard both in U.S.S.R. and Russia
HBS		hydro-braking system (or stages) in a turbodrill
HDHM		hydraulic downhole motor
HH		hydraulic hammer
HTHP		high temperature and high pressure
H ₂S		hydrogen sulfide
IADC		International Association of Drilling Contractors
ID		inside diameter
ISM		drag type drill bit with diamond composite inserts (design of the Institute of Super-hard Materials, Kiev, Ukraine
JSC		joint-stock company
KTW		key test (technological) well
LBF

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