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The phone:+86 18052086280

Jiangsu dilong heavy machinery co., LTD. All rights reserved  

苏ICP备23588956号 Powred by:www.300.cn nanjing.300.cn

Classification summary:
产品维护与保养
Drill the lease
The company has long been in the field of non-excavation research and practice, accumulated rich experience, in line with the concept of customer service, the company provides equipment rental and design and construction and other one-stop services, to meet customers' various requirements...
2018-12-17
Used ground dragon drill
ThecompanyprovidesalargenumberofuseddrillingRIGSandrelatedaccessoriessales,priceconcessions,welcomecustomerstocometoconsult.Contactnumber:400-6655-02518936869866(garden)  
2018-12-17
Some problems about trenchless directional drilling through construction
Trenchlesslayingundergroundpipelinedirectionaldrillingcrossingtechnologyreferstotheuseofdrillingmeansnotexcavatedintheearth'ssurface,undergroundpipelineconstructiontechnology.Energy,communicationsandtrenchlesstechnologyinourcountrycitymunicipalengineeringconstruction,theapplicationofmoreandmorewidely,especiallyinnaturalgas,oil,electricity,water,Piperoofsupportinsuchaspectsaslevelprecipitationandgetverygoodapplications.Environmentalprotectionandshortconstructionperiodhasbeenrecognizedbythemarket.Belowsmallmakeupofthethreemajortechnicalproblemsencounteredintheprocessandwediscussthemtogether. Guidanceofhardsoillayer,sandlayerandpebblelayer Navigationbitselection Beforechoosingaguidebit,onemustfirstunderstandthegeologicalconditionsofsurroundingstrata.Manyconstructionunitsdonotadoptgeologicaldrillingbeforelayingpipesforsmalldirectionaldrilling.Theycanonlyaccumulatesomedatainthisareaforreferenceforalongtime.Whenunderstandingisthemainsoftstratumonthelocation,thenUSEStheguideboardfacelargerguidebit,tocontrolthenavigationdirectionassoonaspossible,whenknowtheconstructionperiodismainlysand,pebblesandhardformationshoulduseduck-billed,smallsurfaceareaofguidebitandweldingonacertainquantityofalloyplate,andweldingbladeAnglecan'ttoolonginordertoprotectthenavigationofbitwear,makeitthroughhardstrata,sandandpebblebed. Bootoperationskills Whenguidebitthroughsandandpebblelayerandhardformation,wanttochangethedirectionofthetrajectory,ifgearedtojacking,canproducepipebendingandguidebitoutletplug,etc.,accordingtotheworkexperience,andturnheadbacktotheoperatingmethodshouldbeadopted,forexampletodirectionup,thentheoperatorshallfeedcontrolofjackingforceinpipetobebent,controlreturnedtothehands,withanotherhandtoguidebitbearingbetween11-1direction,toguidebitturnaroundinthisinterval,makeitsslowdrillingbuttheeffectisverygood,thismethodmustpayattentiontothepreparationofthemud,specialsandandpebbleintoahole,Theholewallshallbeprotectedbyalargeproportionofmud.Theholewallofhardsoillayerhasasmallclearancewiththeouterdiameteroftheguidebit.Therockshallbedischargedoutoftheholeintimetopreventtheguidebitanddrillpipefrombeinglocked. Problemsinreaming reducing Softsoilreaming,pronetoreducingphenomenon,onthesurface:unloadingdrillpipe,mudholethroughdrillpipeflowbackpressure,holewithreducingphenomenon,atthispoint,thereamerbitbacktopullhard,mechanicalload,operationisnotcarrieddrillingaccidentmaybeproducedatthetime,atthistimeofSiZuanShouoperationshouldbeadoptedwhenlightslowturning,instrumentdial,pegoperationaccordingtothecircumstance,beabouttochoosesolidmudmuddivision,andprotectingtheholepressurebalance,keepporeforming. Slumpinghole Sandclaylayer,sandlayer,loosebackfilllayerreamingeasytocollapsehole,drilling,drilling,seriouscracksmayappearontheroadsurfacesubsidence.Solid-phasemud,heavy-gelsolid-phasemudwallprotection.Caneffectivelypreventcollapsehole.Ifslumpingholestoneaccumulationplace,onlyclearthestonemaycontinuetoenlargehole,atthistimeofSiZuanShouoperationmethodis:gentlypullslowlyturn,paycloseattentiontotheinstrumentdial,stayreamingbyslumpinghole,drillbit,backwardtoexpandingonceormanytimes,untiltheholeisatnormaltorque,suchasthebackofthefoundastoneinthedrillbitwillworktowardthetailpittotakeoutthestonescanbeused. Mudleakageornon-grout Inloosebackfillsoil,undergroundwaterlevelislow,sandyclay,sandbed,thebottomlayerofsoftsoilreaming,mudisnotoutoftheorificetoreturn,butfromtheholeleakage,SiZuanShouatthistimetoproperlycontroltheamountofmudpump,muddivisionwillmodulation:increasestheslurryconcentrationandviscosity,formedintheholewallmudleakageresistanceofskin,effectivelypreventleakageofmud,whencrossingtheriver,mudlossseriouscanbecementorflyashareaddedintothemudtocontroltheleakage. Intheprocessofreamingortowingpipelaying,thecommonmudseepsoutfromtheholetotheground.Thereasonsformudseepageareasfollows:firstly,theresidualmudintheholereamingandpipelayingblocksthedrillingholesomuchthatthemudcannotreturnfromtheorifice,andthemudformsahigh-pressuresurfaceintheholeandseepsoutfromtheground;Second,thelocallayerisloosetoleavethemudchannel,themudalongitschannelseepageground. Ingeneral,mudseepagefromthegroundhaslittleimpactonpipelinelaying,butmudseepageshouldbecontrolledundercertaincircumstances.Suchas:mudisnotallowedtooozefromthehousesofresidents,notfromthedowntownseepage,notfromfish,shrimppondseepage,topreventtheleakageofmudmeasuresistoincreasethedepthofdrilling;Thesecondistochangethestructureofthedrillbit,usingvanetype,chutetypedrillbit,asfaraspossiblemuddebrisintomud;Third,thedriller,mudistocontrolthemudconcentration,viscosity,flowrate,increasethemudwallprotection,suspensionandchipremovalability,soastoformacompletedrillinghole,channelmudunimpededreturnfromtheorifice. Theabovearecommonproblemsincomplexstrata.Thekeytothislinkisthatthedrillerandthemudengineershouldcommunicateintimeandadoptreasonableoperationmethodsandeffectivemudallocationtocompletethisprocesssmoothly. Problemsinthedrawingtube Mainproblemsinpipedrawinginclude: 1.Equipmentfailurereasons,delayinthebesttimetopullthepipe
2018-12-17
Construction principle of horizontal directional drilling machine (HDD)
Draw pipe video for horizontal directional drill without excavation
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