Contents 1 History 2 Benefits 3 Disadvantages 3.1 Stealing oil 3.2 New technologies 4 See also 5 References 6 External links

History[edit] Many prerequisites enabled this suite of technologies to become productive. Probably, the first requirement was the realization that oil wells, or water wells, are not necessarily vertical.[original research?] This realization was quite slow, and did not really grasp the attention of the oil industry until the late 1920s when there were several lawsuits alleging that wells drilled from a rig on one property had crossed the boundary and were penetrating a reservoir on an adjacent property.[citation needed] Initially, proxy evidence such as production changes in other wells was accepted, but such cases fueled the development of small diameter tools capable of surveying wells during drilling. Horizontal directional drill rigs are developing towards large-scale, micro-miniaturization, mechanical automation, hard stratum working, exceeding length and depth oriented monitored drilling.[1] Measuring the inclination of a wellbore (its deviation from the vertical) is comparatively simple, requiring only a pendulum. Measuring the azimuth (direction with respect to the geographic grid in which the wellbore was running from the vertical), however, was more difficult. In certain circumstances, magnetic fields could be used, but would be influenced by metalwork used inside wellbores, as well as the metalwork used in drilling equipment. The next advance was in the modification of small gyroscopic compasses by the Sperry Corporation, which was making similar compasses for aeronautical navigation. Sperry did this under contract to Sun Oil (which was involved in a lawsuit as described above), and a spin-off company "Sperry Sun" was formed, which brand continues to this day,[when?][clarification needed] absorbed into Halliburton. Three components are measured at any given point in a wellbore in order to determine its position: the depth of the point along the course of the borehole (measured depth), the inclination at the point, and the magnetic azimuth at the point. These three components combined are referred to as a "survey". A series of consecutive surveys are needed to track the progress and location of a wellbore. Prior experience with rotary drilling had established several principles for the configuration of drilling equipment down hole ("bottom hole assembly" or "BHA") that would be prone to "drilling crooked hole" (i.e., initial accidental deviations from the vertical would be increased). Counter-experience had also given early directional drillers ("DD's") principles of BHA design and drilling practice that would help bring a crooked hole nearer the vertical.[citation needed] In 1934, H. John Eastman & Roman W. Hines of Long Beach, California, became pioneers in directional drilling when they and George Failing of Enid, Oklahoma, saved the Conroe, Texas, oil field. Failing had recently patented a portable drilling truck. He had started his company in 1931 when he mated a drilling rig to a truck and a power take-off assembly. The innovation allowed rapid drilling of a series of slanted wells. This capacity to quickly drill multiple relief wells and relieve the enormous gas pressure was critical to extinguishing the Conroe fire.[2] In a May, 1934, Popular Science Monthly article, it was stated that "Only a handful of men in the world have the strange power to make a bit, rotating a mile below ground at the end of a steel drill pipe, snake its way in a curve or around a dog-leg angle, to reach a desired objective." Eastman Whipstock, Inc., would become the world's largest directional company in 1973.[citation needed] Combined, these survey tools and BHA designs made directional drilling possible, but it was perceived as arcane. The next major advance was in the 1970s, when downhole drilling motors (aka mud motors, driven by the hydraulic power of drilling mud circulated down the drill string) became common. These allowed the drill bit to continue rotating at the cutting face at the bottom of the hole, while most of the drill pipe was held stationary. A piece of bent pipe (a "bent sub") between the stationary drill pipe and the top of the motor allowed the direction of the wellbore to be changed without needing to pull all the drill pipe out and place another whipstock. Coupled with the development of measurement while drilling tools (using mud pulse telemetry, networked or wired pipe or electromagnetism (EM) telemetry, which allows tools down hole to send directional data back to the surface without disturbing drilling operations), directional drilling became easier. Certain profiles cannot be drilled while the drill pipe is rotating. Drilling directionally with a downhole motor requires occasionally stopping rotation of the drill pipe and "sliding" the pipe through the channel as the motor cuts a curved path. "Sliding" can be difficult in some formations, and it is almost always slower and therefore more expensive than drilling while the pipe is rotating, so the ability to steer the bit while the drill pipe is rotating is desirable. Several companies have developed tools which allow directional control while rotating. These tools are referred to as rotary steerable systems (RSS). RSS technology has made access and directional control possible in previously inaccessible or uncontrollable formations.

Benefits[edit] Wells are drilled directionally for several purposes: Increasing the exposed section length through the reservoir by drilling through the reservoir at an angle Drilling into the reservoir where vertical access is difficult or not possible. For instance an oilfield under a town, under a lake, or underneath a difficult-to-drill formation Allowing more wellheads to be grouped together on one surface location can allow fewer rig moves, less surface area disturbance, and make it easier and cheaper to complete and produce the wells. For instance, on an oil platform or jacket offshore, 40 or more wells can be grouped together. The wells will fan out from the platform into the reservoir(s) below. This concept is being applied to land wells, allowing multiple subsurface locations to be reached from one pad, reducing costs. Drilling along the underside of a reservoir-constraining fault allows multiple productive sands to be completed at the highest stratigraphic points. Drilling a "relief well" to relieve the pressure of a well producing without restraint (a "blowout"). In this scenario, another well could be drilled starting at a safe distance away from the blowout, but intersecting the troubled wellbore. Then, heavy fluid (kill fluid) is pumped into the relief wellbore to suppress the high pressure in the original wellbore causing the blowout. Most directional drillers are given a blue well path to follow that is predetermined by engineers and geologists before the drilling commences. When the directional driller starts the drilling process, periodic surveys are taken with a downhole instrument to provide survey data (inclination and azimuth) of the well bore.[3] These pictures are typically taken at intervals between 10–150 meters (30–500 feet), with 30 meters (90 feet) common during active changes of angle or direction, and distances of 60–100 meters (200–300 feet) being typical while "drilling ahead" (not making active changes to angle and direction). During critical angle and direction changes, especially while using a downhole motor, a measurement while drilling) (MWD) tool will be added to the drill string to provide continuously updated measurements that may be used for (near) real-time adjustments. These data indicate if the well is following the planned path and whether the orientation of the drilling assembly is causing the well to deviate as planned. Corrections are regularly made by techniques as simple as adjusting rotation speed or the drill string weight (weight on bottom) and stiffness, as well as more complicated and time-consuming methods, such as introducing a downhole motor. Such pictures, or surveys, are plotted and maintained as an engineering and legal record describing the path of the well bore. The survey pictures taken while drilling are typically confirmed by a later survey in full of the borehole, typically using a "multi-shot camera" device. The multi-shot camera advances the film at time intervals so that by dropping the camera instrument in a sealed tubular housing inside the drilling string (down to just above the drilling bit) and then withdrawing the drill string at time intervals, the well may be fully surveyed at regular depth intervals (approximately every 30 meters (90 feet) being common, the typical length of 2 or 3 joints of drill pipe, known as a stand, since most drilling rigs "stand back" the pipe withdrawn from the hole at such increments, known as "stands"). Drilling to targets far laterally from the surface location requires careful planning and design. The current record holders manage wells over 10 km (6.2 mi) away from the surface location at a true vertical depth (TVD) of only 1,600–2,600 m (5,200–8,500 ft).[4] This form of drilling can also reduce the environmental cost and scarring of the landscape. Previously, long lengths of landscape had to be removed from the surface. This is no longer required with directional drilling.

Disadvantages[edit] Government Accountability Office depiction of horizontal drilling being used to cross tracts of land with differing owners Until the arrival of modern downhole motors and better tools to measure inclination and azimuth of the hole, directional drilling and horizontal drilling was much slower than vertical drilling due to the need to stop regularly and take time-consuming surveys, and due to slower progress in drilling itself (lower rate of penetration). These disadvantages have shrunk over time as downhole motors became more efficient and semi-continuous surveying became possible. What remains is a difference in operating costs: for wells with an inclination of less than 40 degrees, tools to carry out adjustments or repair work can be lowered by gravity on cable into the hole. For higher inclinations, more expensive equipment has to be mobilized to push tools down the hole. Another disadvantage of wells with a high inclination was that prevention of sand influx into the well was less reliable and needed higher effort. Again, this disadvantage has diminished such that, provided sand control is adequately planned, it is possible to carry it out reliably. Stealing oil[edit] In 1990, Iraq accused Kuwait of stealing Iraq's oil through slant drilling.[5] The United Nations redrew the border after the 1991 Gulf war, which ended the seven-month Iraqi occupation of Kuwait. As part of the reconstruction, 11 new oil wells were placed among the existing 600. Some farms and an old naval base that used to be in the Iraqi side became part of Kuwait.[6] In the mid-twentieth century, a slant-drilling scandal occurred in the huge East Texas Oil Field.[7] New technologies[edit] Between 1985 and 1993, the Naval Civil Engineering Laboratory (NCEL) (now the Naval Facilities Engineering Service Center (NFESC)) of Pt Hueneme, California developed controllable horizontal drilling technologies.[8] These technologies are capable of reaching 10 000–15 000 ft (3000–4500 m) and may reach 25 000 ft (7500 m) when used under favorable conditions.[9]

See also[edit] Directional boring Geosteering Hydraulic fracturing Logging while drilling Measurement while drilling Mud motor Mudlogger Rotary steerable system Trenchless technology

References[edit] ^ "Development tendency of horizontal directional drilling". DC Solid control. 6 June 2013. [permanent dead link] ^ "Technology and the "Conroe Crater"". American Oil & Gas Historical Society. Retrieved 2014-09-23.  ^ "Glossary of geo-steering terms". Retrieved 5 September 2010.  ^ "Maersk drills longest well at Al Shadeen". The Gulf Times. 21 May 2008. Archived from the original on 14 February 2012. Retrieved 5 March 2012.  ^ "How the Gulf Crisis Began and Ended (The Gulf Crisis and Japan's Foreign Policy)". Ministry of Foreign Affairs of Japan. Retrieved 28 January 2014.  ^ "Iraq to Reopen Embassy in Kuwait". ABC Inc. 4 September 2005. Retrieved 5 March 2012.  ^ Julia Cauble Smith (2010-06-12). "East Texas Oilfield". Handbook of Texas Online. Texas State Historical Association. Retrieved 2014-09-23.  ^ Horizontal Drilling System (HDS) Field Test Report - FY 91 ^ Horizontal Drilling System (HDS) Operations Theory Report

External links[edit] Wikimedia Commons has media related to Directional drilling. "Slanted Oil Wells, Work New Marvels" Popular Science, May 1934, early article on the drilling technology "Technology and the Conroe Crater" American Oil & Gas Historical Society Short video from American Petroleum Institute explaining horizontal drilling for gas extraction from oil shale. A video depicting horizontal shale drilling can be seen here. "Mechanical Mole Bores Crooked Wells." Popular Science, June 1942, pp. 94–95. The unsung masters of the oil industry 21 July 2012 The Economist v t e Petroleum industry Petroleum Primary energy Benchmarks Argus Sour Bonny Light Brent Dubai Indian Basket Indonesian Isthmus-34 Light Japan Cocktail OPEC Reference Basket Tapis Urals West Texas Intermediate Western Canadian Select Data Natural gas Consumption Production Reserves Imports Exports Price Petroleum Consumption Production Reserves Imports Exports Price (of gasoline and diesel) Exploration Core sampling Geophysics Integrated asset modelling Petroleum engineering Reservoir simulation Seismic to simulation Petroleum geology Petrophysics Reflection seismology (Seismic inversion) Seismic source Drilling Blowout Completion (Squeeze job) Differential sticking Directional drilling (Geosteering) Drilling engineering Drilling fluid (invasion) Drill stem test Lost circulation Measurement Tracers Underbalanced drilling Well logging Production Petroleum fiscal regime Concessions Production sharing agreements Artificial lift Pumpjack Submersible pump (ESP) Gas lift Downstream Enhanced oil recovery (EOR) Steam injection Gas reinjection Midstream Petroleum product Pipeline transport Refining Upstream Water injection Well intervention XT History 1967 Oil Embargo 1973 oil crisis 1979 energy crisis 1980s oil glut 1990 oil price shock 2000s energy crisis 2010s oil glut Founders History of the petroleum industry Nationalization OPEC GECF Seven Sisters Standard Oil Oil market timelines Provinces and fields List of natural gas fields List of oil fields East Midlands Oil Province East Texas Gulf of Mexico Niger Delta North Sea Permian Basin Persian Gulf Prudhoe Bay Oil Field Russia Venezuela Western Canadian Sedimentary Basin Other topics Acronyms Oil shale gas Peak oil mitigation timing People Petrocurrency Petrodollar recycling Shale band Shale gas Swing producer Unconventional oil heavy crude oil sands oil shale Companies and organisations Major petroleum companies Supermajors BP Chevron Eni ExxonMobil Royal Dutch Shell Total National oil companies ADNOC (UAE) CNOOC (China) CNPC (China) Ecopetrol (Colombia) Gazprom (Russia) Iraq National Oil Company Indian Oil Corporation KazMunayGas (Kazakhstan) Kuwait Petroleum Corporation Lotos (Poland) Nigerian National Petroleum Corporation NIOC (Iran) NISOC (Iran) OGDCL (Pakistan) ONGC (India) PDVSA (Venezuela) PKN Orlen (Poland) Pemex (Mexico) Pertamina (Indonesia) PetroBangla (Bangladesh) Petrobras (Brazil) PetroChina Petronas (Malaysia) Petrovietnam PTT (Thailand) Qatar Petroleum Rosneft (Russia) Saudi Aramco (Saudi Arabia) Sinopec (China) SOCAR (Azerbaijan) Sonangol (Angola) Sonatrach (Algeria) Statoil (Norway) TPAO (Turkey) YPF (Argentina) Energy trading Glencore Gunvor Mercuria Naftiran Intertrade Trafigura Vitol Other Anadarko Apache BG Group Cenovus Energy Compañía Española de Petróleos ConocoPhillips Devon Galp Energia Hess Husky Energy Imperial Oil JXTG Holdings Lukoil Marathon Oil Occidental OMV Port Harcourt Refining Company Reliance Industries Repsol Suncor Energy Surgutneftegas TNK-BP Tullow Oil Tüpraş Major services companies Amec Foster Wheeler Baker Hughes Cameron CGG CH2M Hill Chicago Bridge & Iron Company China Oilfield Services Enbridge Ensco GE Oil & Gas Halliburton Nabors Industries Naftiran Intertrade National Oilwell Varco Petrofac Saipem Schlumberger Snam Subsea 7 TransCanada Transocean Weatherford Wood Group Other International Association of Oil & Gas Producers International Energy Agency International Petroleum Exchange OPEC Society of Petroleum Engineers World Petroleum Council Category  Commons v t e Shale gas Geological formations Antrim Barnett Conasauga Duvernay Eagle Ford Fayetteville Haynesville Horn River Marcellus Montney Muskwa New Albany Utica Technology Geosteering Directional drilling Hydraulic fracturing Logging while drilling Measurement while drilling By country Canada China Romania United Kingdom United States List of countries by recoverable shale gas Protests Frack Off Balcombe drilling protest 2012–14 Romanian protests against shale gas Retrieved from "" Categories: Drilling technologyEngineering vehiclesHidden categories: All articles with dead external linksArticles with dead external links from December 2016Articles with permanently dead external linksAll articles that may contain original researchArticles that may contain original research from February 2016All articles with unsourced statementsArticles with unsourced statements from April 2014All articles with vague or ambiguous timeVague or ambiguous time from March 2014Wikipedia articles needing clarification from March 2014Articles with unsourced statements from August 2014Use dmy dates from March 2012

Navigation menu Personal tools Not logged inTalkContributionsCreate accountLog in Namespaces ArticleTalk Variants Views ReadEditView history More Search Navigation Main pageContentsFeatured contentCurrent eventsRandom articleDonate to WikipediaWikipedia store Interaction HelpAbout WikipediaCommunity portalRecent changesContact page Tools What links hereRelated changesUpload fileSpecial pagesPermanent linkPage informationWikidata itemCite this page Print/export Create a bookDownload as PDFPrintable version In other projects Wikimedia Commons Languages DeutschفارسیFrançaisPolskiРусскийSlovenščinaУкраїнська Edit links This page was last edited on 18 February 2018, at 20:20. Text is available under the Creative Commons Attribution-ShareAlike License; additional terms may apply. By using this site, you agree to the Terms of Use and Privacy Policy. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization. Privacy policy About Wikipedia Disclaimers Contact Wikipedia Developers Cookie statement Mobile view (window.RLQ=window.RLQ||[]).push(function(){mw.config.set({"wgPageParseReport":{"limitreport":{"cputime":"0.280","walltime":"0.391","ppvisitednodes":{"value":2061,"limit":1000000},"ppgeneratednodes":{"value":0,"limit":1500000},"postexpandincludesize":{"value":133009,"limit":2097152},"templateargumentsize":{"value":16801,"limit":2097152},"expansiondepth":{"value":13,"limit":40},"expensivefunctioncount":{"value":7,"limit":500},"entityaccesscount":{"value":1,"limit":400},"timingprofile":["100.00% 317.722 1 -total"," 22.15% 70.383 6 Template:Fix"," 22.14% 70.332 1 Template:Reflist"," 15.76% 50.089 1 Template:Petroleum_industry"," 15.59% 49.522 1 Template:OR"," 14.74% 46.835 1 Template:Navbox_with_collapsible_groups"," 12.66% 40.231 13 Template:Category_handler"," 11.55% 36.711 1 Template:Commons_category"," 10.71% 34.029 6 Template:Delink"," 10.42% 33.096 1 Template:Commons"]},"scribunto":{"limitreport-timeusage":{"value":"0.122","limit":"10.000"},"limitreport-memusage":{"value":4981400,"limit":52428800}},"cachereport":{"origin":"mw1244","timestamp":"20180303192734","ttl":1900800,"transientcontent":false}}});});(window.RLQ=window.RLQ||[]).push(function(){mw.config.set({"wgBackendResponseTime":90,"wgHostname":"mw1327"});});

Directional_drilling - Photos and All Basic Informations

Directional_drilling More Links

EnlargeEnlargeContour MapOil ReservoirVermilion ParishErath, LouisianaContour MapFault LineOil ReservoirOil WellOilfieldDirectional BoringCoal Bed MethaneOil WellWater WellWikipedia:No Original ResearchWikipedia:Citation NeededDrill RigsWellboreAzimuthSperry CorporationSun OilSperry SunWikipedia:Manual Of Style/Dates And NumbersWikipedia:Please ClarifyHalliburtonWikipedia:Citation NeededLong Beach, CaliforniaEnid, OklahomaConroe, TexasOil FieldPopular Science MonthlyWikipedia:Citation NeededMud MotorMeasurement While DrillingMud Pulse TelemetryIntelliServElectromagnetismRotary Steerable SystemWellheadOil PlatformRelief WellBlowout (well Drilling)Measurement While DrillingDrill StringEnlargeGovernment Accountability OfficeIraqKuwaitUnited NationsGulf WarInvasion Of KuwaitEast Texas Oil FieldNaval Facilities Engineering Service CenterDirectional BoringGeosteeringHydraulic FracturingLogging While DrillingMeasurement While DrillingMud MotorMudloggerRotary Steerable SystemTrenchless TechnologyWikipedia:Link RotGulf TimesABC Inc.The EconomistTemplate:Petroleum IndustryTemplate Talk:Petroleum IndustryPetroleum IndustryPetroleumPrimary EnergyBenchmark (crude Oil)Argus Sour Crude IndexBonny Light OilBrent CrudeDubai CrudeIndian BasketIndonesian Crude PriceIsthmus-34 LightJapan Crude CocktailOPEC Reference BasketTapis CrudeUrals OilWest Texas IntermediateWestern Canadian SelectList Of Countries By Natural Gas ConsumptionList Of Countries By Natural Gas ProductionList Of Countries By Natural Gas Proven ReservesList Of Countries By Natural Gas ImportsList Of Countries By Natural Gas ExportsNatural Gas PricesList Of Countries By Oil ConsumptionList Of Countries By Oil ProductionList Of Countries By Proven Oil ReservesList Of Countries By Oil ImportsList Of Countries By Oil ExportsPrice Of OilGasoline And Diesel Usage And PricingHydrocarbon ExplorationCore SampleExploration GeophysicsIntegrated Asset ModellingPetroleum EngineeringReservoir SimulationSeismic To SimulationPetroleum GeologyPetrophysicsReflection SeismologySeismic InversionSeismic SourceOil WellBlowout (well Drilling)Completion (oil And Gas Wells)Squeeze JobDifferential StickingGeosteeringDrilling EngineeringDrilling FluidDrilling Fluid InvasionDrill Stem TestLost CirculationMeasurement While DrillingTracer Use In The Oil IndustryUnderbalanced DrillingWell LoggingExtraction Of PetroleumPetroleum Fiscal RegimePetroleum LicensingProduction Sharing AgreementArtificial LiftPumpjackSubmersible PumpGas LiftDownstream (petroleum Industry)Enhanced Oil RecoverySteam Injection (oil Industry)Gas ReinjectionMidstreamPetroleum ProductPipeline TransportOil RefineryUpstream (petroleum Industry)Water Injection (oil Production)Well InterventionChristmas Tree (oil Well)Category:History Of The Petroleum Industry1967 Oil Embargo1973 Oil Crisis1979 Energy Crisis1980s Oil Glut1990 Oil Price Shock2000s Energy Crisis2010s Oil GlutCategory:Founders Of The Petroleum IndustryHistory Of The Petroleum IndustryNationalization Of Oil SuppliesOPECGas Exporting Countries ForumSeven Sisters (oil Companies)Standard OilCategory:Oil Market TimelinesList Of Natural Gas FieldsList Of Oil FieldsEast Midlands Oil ProvinceEast Texas Oil FieldGulf Of MexicoNiger DeltaNorth Sea OilPermian Basin (North America)Persian GulfPrudhoe Bay Oil FieldOil Reserves In RussiaOil Reserves In VenezuelaWestern Canadian Sedimentary BasinList Of Acronyms In Oil And Gas Exploration And ProductionOil Shale GasPeak OilMitigation Of Peak OilPredicting The Timing Of Peak OilCategory:People In The Petroleum IndustryPetrocurrencyPetrodollar RecyclingShale BandShale GasSwing ProducerUnconventional OilHeavy Crude OilOil SandsOil ShaleList Of Oil Exploration And Production CompaniesSupermajorBPChevron CorporationEniExxonMobilRoyal Dutch ShellTotal S.A.National Oil CompanyAbu Dhabi National Oil CompanyChina National Offshore Oil CorporationChina National Petroleum CorporationEcopetrolGazpromIraq National Oil CompanyIndian Oil CorporationKazMunayGasKuwait Petroleum CorporationGrupa LotosNigerian National Petroleum CorporationNational Iranian Oil CompanyNational Iranian South Oil CompanyOil And Gas Development CompanyOil And Natural Gas CorporationPDVSAPKN OrlenPemexPertaminaPetrobanglaPetrobrasPetroChinaPetronasPetrovietnamPTT Public Company LimitedQatar PetroleumRosneftSaudi AramcoSinopecSOCARSonangol GroupSonatrachStatoilTürkiye Petrolleri Anonim OrtaklığıYPFEnergy TradingGlencoreGunvor (company)Mercuria Energy GroupNaftiran IntertradeTrafiguraVitolAnadarko PetroleumApache CorporationBG GroupCenovus EnergyCompañía Española De PetróleosConocoPhillipsDevon EnergyGalp EnergiaHess CorporationHusky EnergyImperial OilJXTG HoldingsLukoilMarathon OilOccidental PetroleumOMVPort Harcourt Refining CompanyReliance IndustriesRepsolSuncor EnergySurgutneftegasTNK-BPTullow OilTüpraşList Of Oilfield Service CompaniesAmec Foster WheelerBaker HughesCameron InternationalCGG (company)CH2M HillChicago Bridge & Iron CompanyChina Oilfield ServicesEnbridgeEnsco PlcGE EnergyHalliburtonNabors IndustriesNaftiran IntertradeNational Oilwell VarcoPetrofacSaipemSchlumbergerSnamSubsea 7TransCanada CorporationTransoceanWeatherford InternationalWood GroupInternational Association Of Oil & Gas ProducersInternational Energy AgencyInternational Petroleum ExchangeOPECSociety Of Petroleum EngineersWorld Petroleum CouncilCategory:Petroleum IndustryTemplate:Shale GasTemplate Talk:Shale GasShale GasFormation (stratigraphy)Antrim ShaleBarnett ShaleConasauga ShaleDuvernay FormationEagle Ford FormationFayetteville FormationHaynesville ShaleHorn River FormationMarcellus FormationMontney FormationMuskwa FormationNew Albany ShaleUtica ShaleGeosteeringHydraulic FracturingLogging While DrillingMeasurement While DrillingShale Gas By CountryShale Gas In CanadaShale Gas In ChinaShale Gas In RomaniaShale Gas In The United KingdomShale Gas In The United StatesList Of Countries By Recoverable Shale GasFrack OffBalcombe Drilling Protest2012–14 Romanian Protests Against Shale GasHelp:CategoryCategory:Drilling TechnologyCategory:Engineering VehiclesCategory:All Articles With Dead External LinksCategory:Articles With Dead External Links From December 2016Category:Articles With Permanently Dead External LinksCategory:All Articles That May Contain Original ResearchCategory:Articles That May Contain Original Research From February 2016Category:All Articles With Unsourced StatementsCategory:Articles With Unsourced Statements From April 2014Category:All Articles With Vague Or Ambiguous TimeCategory:Vague Or Ambiguous Time From March 2014Category:Wikipedia Articles Needing Clarification From March 2014Category:Articles With Unsourced Statements From August 2014Category:Use Dmy Dates From March 2012Discussion About Edits From This IP Address [n]A List Of Edits Made From This IP Address [y]View The Content Page [c]Discussion About The Content Page [t]Edit This Page [e]Visit The Main Page [z]Guides To Browsing WikipediaFeatured Content – The Best Of WikipediaFind Background Information On Current EventsLoad A Random Article [x]Guidance On How To Use And Edit WikipediaFind Out About WikipediaAbout The Project, What You Can Do, Where To Find ThingsA List Of Recent Changes In The Wiki [r]List Of All English Wikipedia Pages Containing Links To This Page [j]Recent Changes In Pages Linked From This Page [k]Upload Files [u]A List Of All Special Pages [q]Wikipedia:AboutWikipedia:General Disclaimer

view link view link view link view link view link