W/C

W/V

WAG

Wait and Weigh Method

Waiting on Cement or WOC

Walking Beam (beam lift)

Walking Squeeze

Walking Wash

Wall Cake

Wall Hook

Wall Stuck

WARI

Wash Over

Wash Pipe

Washing

Washout (drilling)

Washout (formation)

Washover Operation

Wasting Assets

Water Base Emulsion or Mud

Water Block

Water Coning

Water Cushion

Water Cut

Water Disposal Well

Water Drive

Water Flood

Water Frac

Water Hammer

Water-in-Oil Emulsion

Water Injector Well

Water Mellon Mill

Water of Condensation

Water Pack

Water Table (drilling)

Water Wet

Wave Train

Wax

Wax Beads

WBM

WBS (rock strength)

WBS (seismic)

WC

WCL (SSSV)

Weak Link (coiled tubing)

Weak Point (wireline or CT)

Weather Window

Weathered (mineral)

Weave Screens (sand control)

Weevil

WEG

Weight (tubing)

Weight Bar

Weight Indicator

Weight Stem

Weight Up

Weighting Materials

Well Cleanup

Well Construction

Well Control

Well Interference

Well Operation

Well Patroller(tm)

Well Productivity

Well Program

Well Pulling Hoist

Well Sorted

Wellbore

Wellbore Cleanout

Wellbore Diagram

Wellbore Screenout

Wellbore Storage Effect

Wellbore Wash (chemical treating)

Wellhead

Wet

Wet Combustion

Wet Gas

Wet Gloss Heating Value (reactions)

Wet Oil

Wet Shoe

WETS(tm)

Wettability

Wetted Surface

Wetting Fluid

WF

WFRV

WFT

WG

WHE (wells)

WHFP

Whipstock

White Oil

Whole Core

WHP

WHT

Wickers

Wildcat

WIMS

Window (casing)

Window (hydraulic)

Wing Valve

WIO

WIOP

Wiper Plug

Wireline

Wireline Entry Guide

Wireline Feeler

Wireline Preventor

Wireline Retrievable

Wireline Tools

Wire Wrapped Screen

WIT

WLM

WLMD

WML (perforating)

WO

WOB

Wobble Ring (gas lift)

WOC

WOE

WOO

WOR

Work Basket

Work Hardening

Work String

Working Interest

Working Pressure

Working Window

Workover

Workover Rig

Worm

Wormhole

WOS

WOW

WPC

WPH

WRIV

WROV

Wrought

Wrought Iron

WRSSV

WSO

WTI

WTR

WTS

WWS