E&A

E&P

E-Line

Eccentricity

ECD

Echo Meter(tm)

Economic Interest

Economic Limit

EconoProp(tm)

E_corr

ECP

ECTFE

eCTU

ED (elastomers)

Edge water

EDP (subsea)

EDTA

Eductor

Effective Permeability

Effective Porosity

Effective Shot Density

Effective Wellbore Radius

Effluent

EGM

EGMBE

EGP

Eight Round

EIS

EIT

EL

EL&P

Elastic

Elastic Deformation

Elastic Limit

Elasticity

Elastomer

Elbow

Electric Line or E-Line

Electric Logging

Electrical Log

Electrical Submersible Pump or ESP

Electrolyte

Electromotive Force Series (corrosion)

Electrostatic Treater

Elevator Bails or Links

Elevators

ELMD

Elongation

EM

Embedment

Embrittlement

EMF

Empirical

Emulsifier

Emulsion

Emulsion Stabilizer

EMW

Encapsulated breaker

Endothermic

Endurance Limit

Enhanced Oil Recovery

Entitlement (reserves/production)

Entrained Gas

Environmental Cracking

EOB

Eocene

Eolian

Eon

EOP

EOR

EOS

EOT

EP

EPA

EPM

Epoch

Epoxy

EPT

EQMW

Equalizing Feature

Equivalent Circulating Density

Equivalent Mud Weight

Equivalent Weight

Era

ERD

ERF

ERFC(x)

Erosion

Erosion Corrosion

ERW

ES (treating)

ES (wireline)

ESD

ESP

ESR

ESS (sand control)

ESS (seismic)

ESV

Ethane

Ethanol

Ethernet (computer)

Ethylene

ETP (BP)

EU or EUE

Euler Method (seismic)

EUR

Eutectic (brine)

Evaporite

Event (Risk)

EVXT(tm) (subsea)

EVXT-DB (subsea)

EVXT-SB (subsea)

Excess Cement

Exfoliation Corrosion

EXHT(tm) (subsea)

Exothermic

Expandable Casing

Expandable Completions

Expandable Hanger

Expanding Cement

Expansion Joint

Expectancy

Expected Value (Risk)

Expendable Gun (perforating)

Exploitation

Exploration

Exploration Well

Explosive Cutter

Explosive Decompression

Explosive Fracturing

Explosive Limits

Exposed Guns

Extended Reach Well or ERW

Extension Well

External Cage Choke

External Casing Packer

External Cutter

External Filter Cake

External Phase

External Upset

Extraction Loss (produced fluids)

Extraction Plant

Extreme Overbalance Perforating

Extrusion Gap

Extrusive Igneous Rock

EZSV(tm)