Principle Analysis And Design Of The High Pressure Water Jet Anti-deviation Device

With the further development of oil-field exploration,the well deviation bring a seriesharm to the drilling engineering in the drilling process,so the technique of preventingdeviation and hole straightening in the drilling process is also caused the oil-fielddevelopment personnel's value more and more.Analysis anti-deflection device of domesticand foreign,there are many deviation control ways.Some simple anti-deflection device is notsuitable for complex formation.Automatic vertical drilling technology monopolies by foreignandweusethemwillpayhighcost.Sothisarticledesignanewtypeofhigh-pressurewaterjetanti-deflectiondevice.Encountered a serious hole deviation and low efficiency in the complex deep well orcomplex formation.This paper develop a novel method to prevent the hole deviation-high-pressure water jet anti-deflection.There is a gravitational deflection In the high-pressurewater jet anti-deflection,it detected hole deviation position.The valve mechanics guidehigh-pressure water jet into a low-side in the hole.High pressure jet was turned on during thepart of rotating times,it erosion on strata which we hope.Complete fluid switch through thevalve body.During drilling direction can be controlled.In this way there will be a verticalwell.This device uses high-pressure water jet technology,so it can improve fractured rock andbottomholecleaning.Itisanewtypeofanti-deflectiondevice.High-pressure water jet anti-deflection device composed of two parts which gravitydeflection system and valves parts system.Valve system is composed of the electromagneticvalve and slide valve.Design idea of valve system is that use conventional drill fluid flowcontrol the high-pressure fluid flow.The paper has established the simplified PDC bit whichhave high pressure nozzle three dimensional geometric model and hole bottom of the well flow field physical model using the PRO/E software.Then uses the standard k ??turbulentflowmodel tosimulationthebottom ofthewell flowfieldunderdrill bit staticcondition.Thisprove High-pressure water jet to prevent borehole tilt.Then establishment of solenoid valvemathematical model is discussed and its response characteristics by simulation model whichisruninSIMULINKofMATLABareanalyzed.Analysisoftheresponsecharacteristicsofthesolenoid valve.It proved that the electromagnetic valve to control the switching is stable andreliable.At last 3D graphics of parts and overall structure are made byusing Pro/ENGINEERsoftware.The structural analysis and motion emulation of the Anti-deflection device typesuperchargeareachievedatthebase.The design of Anti-deflection device will have an important guiding significance to thedevelopmentoftheverticalboreholeandHigh-pressurejet-orientedTechnologyinthefuture.