S-Line

S Profile

S-Riser

S-Shaped Well

S Wave

Sack (cement)

Sacrificial Anode

Saddle

Saddle Bearing

Safeing Out

Safety Clamp

Safety Factor

Safety Head

Safety Joint

Safety Release

Safety Slide

Safety Valve

Sag

SAGD

Sail Angle

Salamander

Sales Gas

Saline water

Salinity

Salinity Log

Salt (brine)

Salt Bed Storage

Salt Bridging Material

Salt Cavern

Salt Dome

Salt Water (production)

Saltation

Sample Log

Sample Rate

Sampson Post

SAM(tm)

Sand (formation)

Sand Bailer

Sand Consolidation

Sand Control

Sand Control Screen

Sand Frac

Sand Free Rate (production)

Sand Line

Sand Line Drill

Sand Production

Sand Screen

Sand Trap

Sandface

Sanding Back

Sand/Shale Ratio Map

Sandstone

Sandy Service

SAS

Satellite Field

Satellite Well

Saturated Solution

Saturation (reservoir)

Saturation Exponent

Saturation Pressure

Saucier Criteria

Saver Sub (drill string)

SBHP

SBHT

SBM

SBR (elastomer)

Scab Liner

SCADA System

Scale

Scale Converter

Scale Dissolver

Scale Inhibitor

Scale Inhibition Squeeze

Scale Prediction

Scaled Off

Scallop Gun

Scavenger

SCBA

SCC (corrosion)

SCC (sand control)

Scf

Scfm

Schist

Scintillation Detector

SCM (subsea)

SCRAMS(tm)

SCSFS

SCL

Scour

Scout

Scout Ticket

SCP

SCR (alternate)

SCR (completions)

Scraper

Scratchers (cementing)

Screen

Screen Analysis

Screen Centralizer

Screen Only Completion

Screen Out

Screen Table

Screening Effect

Screenless Frac

Screw Port Gun (perforating)

Scrub

Scrubber

ScSSV

ScSSV Leak Rate (acceptable to pass)

SCVF

SD

SDFN

SDR (downhole gauge)

SDR

SDV

Sea Water Composition (ASTM.D1141)

Sea Water Composition (typical)

Sea Water Density

Seal (geologic)

Seal (mechanical)

Seal Assembly

Seal Bore Extension

Seal Bore Packer

Seal Ram

Seal Swelling

Seal-Tite

Sealing Fault

Seating Nipple

Secondary Cementing

Secondary Porosity

Secondary Recovery

Section (US land)

Sedimentary

Sedimentary Basin

Seeding

Seep (natural flow)

Seismic

Seismic Lines

Seismograph

Selective Firing

Selective Profile

Self Potential Log

SEM

Semi-Submersible

Separation (fluid treating)

Separator

Separator Pressure

Sepiolite

Sequestration

Service Well

Sessile

Set Back

Set Casing

Set Pipe

Set-Through Completion

Settling Tank

Set Up

S_g

SGR

Shake-Out Tests

Shaker

Shale

Shale Control Inhibitor

Shale Gas

Shale Oil

Shale Shaker

Shaped Charge

Shear Joint

Shear Load

Shear Modulus (G)

Shear Pin

Shear Ram

Shear Rate

Shear Strength

Shear Stress (viscosity)

Shear Thinning

Shear Wave

Shearing The Pin

Sheath

Sheave

Sheen

Sheet Sand

Shielded

Shifting A Sleeve

Shock Absorber

Shoe (casing)

Shoe Joint

Shoe Test

Shoe Track

Shoestring Sands

Shoot Fluid Level

Shooting Nipple

Shooting the Well

Shootoff (pipe recovery)

Shootoff (perforating)

Shore Hardness (plastics)

welcome

Short Radius

Short String (dual completion)

Short Trip

Shot Density

Shot Hole (completions)

Shot Hole (seismic)

Shot Point

Shoulder

Shoulder Off

Show

SHR (subsea)

Shrimp (testing)

Shrinkage Factor

Shroud

Shunt Tube

Shut-in

Shut-in Casing Pressure

Shut-in Pressure

Shut-in Tubing pressure

SI

SIBHP

SICP

Side-By-Side Completion

Side Pocket Mandrel

Siderite

Sidetrack

Sidewall Core

SIDPP

Sieve Distribution

Significant Wave Height

Silica Gel (drier)

Sill (rock)

Silt

Silt Stabilized Emulsion

Silurian

SIMOPs

Single Pole Unit or Rig

Sink Hole

Sinker Bar

Sinusoidal

Siphon String

SITHP

SITP

SIWHP

Sized Salt

Skid

Skin

Skin Damage

Skin Frac

SL

Slack-Off Weight

Slate

SLB

SLD (wireline)

Slick Joint

Slick Line

Slick Water

Sliding Sleeve

Slim Hole

Slime Former

Slip and Cut

Slip Joint

Slip Ram

Slip Stop (wireline)

Slippage

Slips

SLM

Slotted Liner

Sloughing (shale)

Sloughing Shale

Slow Taper

Sludge

Sluff

Slug

Slug Flow

Slurry

Slurry Packing

Sm³

Smectite

SNAP(tm)

welcome

Snubbing (pipe running)

Snubbing Basket

Snubbing Job

Snubbing Stack

S_o

Soak

Soap Stick

SOC

Soda Ash

Sodium Bicarbonate

Sodium Silicate

Soft Water

Soil Mechanics

Solid Body Centralizer

Solution Gas

Solution Gas Drive

Solution GOR

Solvent

Sonalog

Sonde

Sonic Amplitude Log

Sonic Caliper

Sonic Log

SOP

SOR

Sorption

Sorting

SOS

Sour

Sour Crude

Sour Gas

Sour Service

Sour Service Rating

Source Rock

SOV

SOx

SP

SPA (BP)

Space Domain (seismic)

Space Out

Space Out Joint (drilling)

Spacer (pumping)

Spacing

Spaghetti String

Spalling

Spang Jar

Sparge

SPE

Spear

Specific Gravity

Specific Heat

Specific Weight

Spectral Gamma Ray

Spectral Gamma Ray Image

Spf (perforating)

Spider

Spill Point (reservoir)

Spinner Log

Spinning Chain

Spiral-Grooved Drill Collar

Spiralizer(tm)

Split Shot(tm)

Split Skirt (milling tool)

SPM (drilling)

Spm (perforating)

SPOC

Spontaneous Potential Log or SP

Spot Market

Spotting Fluid

Spread Cost

Spud

Spurt Loss

SPWLA

Squeeze Cementing

Squeeze Packer

SRB

SRD

SrSO₄

SRT

SS

SSC

SSD

SSIV

SSP

SSTT

SSSV

SSV

ST

Stab

Stabilizers (drilling)

ST&C

Stack (seismic)

Stage Tool (cementing)

Staged Cementing

Stall (fluid powered motors)

Stand

Stand-by-Time

Stand of Pipe

Stand Off

Stand Pipe

Standing Valve

Standoff

Standpipe

Stationary Block (drilling)

Stationary slips

Standard Blue Barrel

Static Bottom Hole Pressure

Static Fluid Level

Static Pressure

Static Seal

Stator (PDM motor)

STB

Steam Flood

Steerable Motor (drilling)

Stem (wireline)

Step Out Well

Step Rate Breakdown Test

Stretch Target (Risk)

STG (subsea)

Stick Plot

Stimplan(tm)

Stinger (well control)

Stinger (well tubular)

StM³

STO

Stock Tank Barrel

Stock Tank Conditions

STOOIP

Stop-cocking

Storm Choke

STP

Straddle

Straddle Packer

Straight Hole

Strain

Strain Gauge

Strap

Stratification (logging)

Stratified Flow

Stratigraphic Trap

Stratigraphy

Stray Current

Stray Current Corrosion

Stream Bed

Stress Cage

Stress Chloride Cracking

Stress Corrosion Cracking / Stress Corrosion

Stress Crack

Stress Relief

Stress Riser

Strike

Strike-Slip Fault

String Mill

String Shot

Stringing Up

Strip (processing)

Strip Gun

Strip Over

Stripper

Stripper Rubber

Stripper Well

Stripping (pipe running)

Structural Casing

Structural Map

Structural Model (seismic)

Structural Trap

Stuffing Box

STV (subsea)

Styolite

Sub

Sub Critical (flow)

Submersible Electrical Pump

Subsalt

Subsea Completion

Subsea Well

Subsidence

Subsurface Controlled Subsurface Safety Valve

Subsurface Safety Valve or SSSV

Sucker Rod

Sugar Water (cementing)

Suicide Squeeze

Sulfamic Acid

Sulfide Stress Cracking

Sump

Sump Packer

Supercharging

Super Saturated

SURF

Surface Active Agents

Surface Casing

Surface Controlled Subsurface Safety Valve or ScSSV

Surface Roughness

Surface Tension

Surfactant

Surge Tool

Surging (pipe movement)

Surging (flow)

Susceptibility (seismic)

Suspend

SW

S_w

Sw/So (logging)

Swa (logging)

SWD

Sw_irr

Swab

Swab Valve

Swage

Swarf

SWC

SWC(corrosion)

Sw_cor (logging)

Sweep

Sweep Efficiency

Sweep Pill

Sweet

Sweetening

Swell Packer

Swept Volume (circulating)

SWI (logging)

Swivel (drilling)

SWOP

SWR (subsea)

Swr (logging)

Syncline

Synthetic Crude

Synthetic Oil Based Mud

SX

Sxo (logging)

Syncrude

Syngas

Syneresis