SUBROUTINE Utube2_and_TripIn ! is called in subroutine CirculationCodeSelect annulus to string Use UTUBEVARS Use GeoElements_FluidModule USE CMudPropertiesVariables USE MudSystemVARIABLES USE Pumps_VARIABLES use CDrillWatchVariables !use CTanksVariables, TripTankVolume2 => DrillingWatch%TripTankVolume, TripTankDensity2 => TripTankDensity Use CShoeVariables implicit none write(*,*) 'Utube2 code' !===========================================================WELL============================================================ !===========================================================WELL============================================================ UtubeMode2Activated= .true. write(*,*) 'QUtubeOutput=' , QUtubeOutput !QUTubeInput=5000. StringFlowRate= QUtubeOutput ! (gpm) AnnulusFlowRate= QUtubeOutput StringFlowRateFinal= StringFlowRate AnnulusFlowRateFinal= AnnulusFlowRate !=========================================== if (FirstSetUtube2==0) then ! call St_MudDischarged_Volume%AddToFirst (REAL(sum(F_Interval(1:F_StringIntervalCounts)%Volume))) !startup initial ! call St_Mud_Backhead_X%AddToFirst (Xstart_PipeSection(1)) ! call St_Mud_Backhead_section%AddToFirst (1) ! call St_Mud_Forehead_X%AddToFirst (Xend_PipeSection(F_StringIntervalCounts)) ! call St_Mud_Forehead_section%AddToFirst (F_StringIntervalCounts) ! call St_Density%AddToFirst (REAL(ActiveDensity)) ! initial(ppg) ! call St_RemainedVolume_in_LastSection%AddToFirst (0.0d0) ! call St_EmptyVolume_inBackheadLocation%AddToFirst (0.0d0) ! ! call Ann_MudDischarged_Volume%AddToFirst (REAL(sum(F_Interval((F_StringIntervalCounts+F_BottomHoleIntervalCounts+1):F_IntervalsTotalCounts)%Volume))) !startup initial ! call Ann_Mud_Backhead_X%AddToFirst (Xstart_PipeSection(F_StringIntervalCounts+1)) ! call Ann_Mud_Backhead_section%AddToFirst (F_StringIntervalCounts+1) ! call Ann_Mud_Forehead_X%AddToFirst (Xend_PipeSection(NoPipeSections)) ! call Ann_Mud_Forehead_section%AddToFirst (NoPipeSections) ! call Ann_Density%AddToFirst (REAL(ActiveDensity)) ! initial(ppg) ! call Ann_RemainedVolume_in_LastSection%AddToFirst (0.0d0) ! call Ann_EmptyVolume_inBackheadLocation%AddToFirst (0.0d0) !Hz_Density%Array(:)= 0.0 !Hz_MudOrKick%Array(:)= 104 Hz_Density_Utube= 0.0 Hz_MudOrKick_Utube= 104 FirstSetUtube2= 1 endif !========================Horizontal PIPE ENTRANCE================= !if (SuctionDensity_Old >= (ActiveDensity+0.05) .or. SuctionDensity_Old <= (ActiveDensity-0.05)) then ! new mud is pumped ! !ImudCount= ImudCount+1 ! !SuctionMud= ImudCount ! call Hz_Density%AddToFirst (REAL(ActiveDensity)) !ActiveDensity : badan in moteghayer bayad avaz beshe ! call Hz_MudDischarged_Volume%AddToFirst (0.0d0) ! call Hz_Mud_Forehead_X%AddToFirst (Xstart_PipeSection(1)) ! call Hz_Mud_Forehead_section%AddToFirst (1) ! call Hz_Mud_Backhead_X%AddToFirst (Xstart_PipeSection(1)) ! call Hz_Mud_Backhead_section%AddToFirst (1) ! call Hz_RemainedVolume_in_LastSection%AddToFirst (0.0d0) ! call Hz_EmptyVolume_inBackheadLocation%AddToFirst (0.0d0) ! call Hz_MudOrKick%AddToFirst (0) ! deltaV= 0. ! ! SuctionDensity_Old= ActiveDensity !endif !========================Horizontal PIPE STRING================= !commented ! Hz_MudDischarged_Volume%Array(1)= Hz_MudDischarged_Volume%Array(1)+ ((StringFlowRate/60.)*DeltaT_Mudline) !(gal) ! !imud=0 ! do while (imud < Hz_Mud_Forehead_X%Length()) ! imud = imud + 1 ! ! if (imud> 1) then ! Hz_Mud_Backhead_X%Array(imud)= Hz_Mud_Forehead_X%Array(imud-1) ! Hz_Mud_Backhead_section%Array(imud)= Hz_Mud_Forehead_section%Array(imud-1) ! endif ! ! ! DirectionCoef= (Xend_PipeSection(Hz_Mud_Backhead_section%Array(imud))-Xstart_PipeSection(Hz_Mud_Backhead_section%Array(imud))) & ! / ABS(Xend_PipeSection(Hz_Mud_Backhead_section%Array(imud))-Xstart_PipeSection(Hz_Mud_Backhead_section%Array(imud))) ! ! +1 for string , -1 for annulus ! ! ! Hz_EmptyVolume_inBackheadLocation%Array(imud)= DirectionCoef* (Xend_PipeSection(Hz_Mud_Backhead_section%Array(imud))- Hz_Mud_Backhead_X%Array(imud))* & ! Area_PipeSectionFt(Hz_Mud_Backhead_section%Array(imud)) !(ft^3) ! Hz_EmptyVolume_inBackheadLocation%Array(imud)= Hz_EmptyVolume_inBackheadLocation%Array(imud)* 7.48051948 ! ft^3 to gal ! ! ! if ( Hz_MudDischarged_Volume%Array(imud) <= Hz_EmptyVolume_inBackheadLocation%Array(imud)) then ! Hz_Mud_Forehead_section%Array(imud)= Hz_Mud_Backhead_section%Array(imud) ! Hz_Mud_Forehead_X%Array(imud)= Hz_Mud_Backhead_X%Array(imud)+ DirectionCoef*(Hz_MudDischarged_Volume%Array(imud)/7.48051948)/Area_PipeSectionFt(Hz_Mud_Backhead_section%Array(imud)) ! ! 7.48051948 is for gal to ft^3 ! else ! ! isection= Hz_Mud_Backhead_section%Array(imud)+1 ! Hz_RemainedVolume_in_LastSection%Array(imud)= Hz_MudDischarged_Volume%Array(imud)- Hz_EmptyVolume_inBackheadLocation%Array(imud) ! ! do ! if (isection > 1) then ! (horizontal pipe exit) ! Hz_MudDischarged_Volume%Array(imud)= Hz_MudDischarged_Volume%Array(imud)- Hz_RemainedVolume_in_LastSection%Array(imud) ! Hz_Mud_Forehead_X%Array(imud)= Xend_PipeSection(1) ! Hz_Mud_Forehead_section%Array(imud)= 1 ! if (Hz_MudDischarged_Volume%Array(imud)<= 0.0d0) then ! imud is completely exited form the string ! call Hz_MudDischarged_Volume%Remove (imud) ! call Hz_Mud_Backhead_X%Remove (imud) ! call Hz_Mud_Backhead_section%Remove (imud) ! call Hz_Mud_Forehead_X%Remove (imud) ! call Hz_Mud_Forehead_section%Remove (imud) ! call Hz_Density%Remove (imud) ! call Hz_RemainedVolume_in_LastSection%Remove (imud) ! call Hz_EmptyVolume_inBackheadLocation%Remove (imud) ! call Hz_MudOrKick%Remove (imud) ! endif ! exit ! endif ! ! xx= Hz_RemainedVolume_in_LastSection%Array(imud)/ PipeSection_VolumeCapacity(isection) !(gal) ! ! if (xx<= 1.0) then ! Hz_Mud_Forehead_section%Array(imud)= isection ! Hz_Mud_Forehead_X%Array(imud)= (xx * (Xend_PipeSection(isection)- Xstart_PipeSection(isection)))+ Xstart_PipeSection(isection) ! exit ! else ! Hz_RemainedVolume_in_LastSection%Array(imud)= Hz_RemainedVolume_in_LastSection%Array(imud)- PipeSection_VolumeCapacity(isection) ! isection= isection+ 1 ! ! ! endif ! ! enddo ! ! endif ! ! enddo !commented !========================Horizontal PIPE END================= !========================ANNULUS ENTRANCE==================== if (ABS(AnnulusSuctionDensity_Old - Hz_Density_Utube) >= DensityMixTol ) then ! new mud is pumped call Ann_Density%Add (Hz_Density_Utube) call Ann_MudDischarged_Volume%Add (0.0d0) call Ann_Mud_Forehead_X%Add (Xend_PipeSection(NoPipeSections)) call Ann_Mud_Forehead_section%Add (NoPipeSections) call Ann_Mud_Backhead_X%Add (Xstart_PipeSection(NoPipeSections)) call Ann_Mud_Backhead_section%Add (NoPipeSections) call Ann_RemainedVolume_in_LastSection%Add (0.0d0) call Ann_EmptyVolume_inBackheadLocation%Add (0.0d0) call Ann_MudOrKick%Add (Hz_MudOrKick_Utube) ! Hz_MudOrKick%Last() = 104 call Ann_CuttingMud%Add (0) AnnulusSuctionDensity_Old= Hz_Density_Utube endif !========================ANNULUS==================== Ann_MudDischarged_Volume%Array(Ann_MudDischarged_Volume%Length())= Ann_MudDischarged_Volume%Last()+ ((AnnulusFlowRate/60.)*DeltaT_Mudline) !(gal) imud= Ann_Mud_Forehead_X%Length() + 1 do while (imud > 1) imud = imud - 1 if (imud< Ann_Mud_Forehead_X%Length()) then Ann_Mud_Forehead_X%Array(imud)= Ann_Mud_Backhead_X%Array(imud+1) Ann_Mud_Forehead_section%Array(imud)= Ann_Mud_Backhead_section%Array(imud+1) endif ! <<< Fracture Shoe Lost IF ( ShoeLost .and. LostInTripOutIsDone== .false. .and. Shoe%ShoeDepth < Ann_Mud_Backhead_X%Array(imud) .and. Shoe%ShoeDepth >= Ann_Mud_Forehead_X%Array(imud) ) then !write(*,*) 'ShoeLost imud,AnnVolume(imud), VolumeLost:' , imud,Ann_MudDischarged_Volume%Array(imud), (( Qlost/60.0d0)*DeltaT_Mudline) Ann_MudDischarged_Volume%Array(imud)= Ann_MudDischarged_Volume%Array(imud)-((Qlost/60.0d0)*DeltaT_Mudline) !(gal) if (Ann_MudDischarged_Volume%Array(imud) < 0.0) then !write(*,*) 'mud is removed by shoe lost, imud=' , imud call RemoveAnnulusMudArrays(imud) imud= imud-1 cycle endif ENDIF ! Fracture Shoe Lost >>> DirectionCoef= (Xend_PipeSection(Ann_Mud_Forehead_section%Array(imud))-Xstart_PipeSection(Ann_Mud_Forehead_section%Array(imud))) & / ABS(Xend_PipeSection(Ann_Mud_Forehead_section%Array(imud))-Xstart_PipeSection(Ann_Mud_Forehead_section%Array(imud))) ! +1 for string , -1 for annulus Ann_EmptyVolume_inBackheadLocation%Array(imud)= DirectionCoef* (Ann_Mud_Forehead_X%Array(imud)- Xstart_PipeSection(Ann_Mud_Forehead_section%Array(imud)))* & Area_PipeSectionFt(Ann_Mud_Forehead_section%Array(imud)) !(ft^3) Ann_EmptyVolume_inBackheadLocation%Array(imud)= Ann_EmptyVolume_inBackheadLocation%Array(imud)* 7.48051948d0 ! ft^3 to gal if ( Ann_MudDischarged_Volume%Array(imud) <= Ann_EmptyVolume_inBackheadLocation%Array(imud)) then Ann_Mud_Backhead_section%Array(imud)= Ann_Mud_Forehead_section%Array(imud) Ann_Mud_Backhead_X%Array(imud)= Ann_Mud_Forehead_X%Array(imud)- DirectionCoef*(Ann_MudDischarged_Volume%Array(imud)/7.48051948d0)/Area_PipeSectionFt(Ann_Mud_Forehead_section%Array(imud)) ! 7.48051948 is for gal to ft^3 else isection= Ann_Mud_Forehead_section%Array(imud)-1 Ann_RemainedVolume_in_LastSection%Array(imud)= Ann_MudDischarged_Volume%Array(imud)- Ann_EmptyVolume_inBackheadLocation%Array(imud) do if (isection < F_StringIntervalCounts+1) then ! last pipe section(well exit) F_StringIntervalCounts+1 is the first section in Annulus Ann_MudDischarged_Volume%Array(imud)= Ann_MudDischarged_Volume%Array(imud)- Ann_RemainedVolume_in_LastSection%Array(imud) Ann_Mud_Backhead_X%Array(imud)= Xstart_PipeSection(F_StringIntervalCounts+1) Ann_Mud_Backhead_section%Array(imud)= F_StringIntervalCounts+1 if (Ann_MudDischarged_Volume%Array(imud)<= 0.0d0) then ! imud is completely exited form the well call RemoveAnnulusMudArrays(imud) endif exit endif xx= Ann_RemainedVolume_in_LastSection%Array(imud)/ PipeSection_VolumeCapacity(isection) !(gal) if (xx<= 1.0) then Ann_Mud_Backhead_section%Array(imud)= isection Ann_Mud_Backhead_X%Array(imud)= (xx * (Xstart_PipeSection(isection)- Xend_PipeSection(isection)))+ Xend_PipeSection(isection) exit else Ann_RemainedVolume_in_LastSection%Array(imud)= Ann_RemainedVolume_in_LastSection%Array(imud)- PipeSection_VolumeCapacity(isection) isection= isection- 1 endif enddo endif enddo !========================ANNULUS END================= !========================== tripping in for OP remove =============================== !if (DeltaVolumeOp>0. .and. DeltaVolumeOp< Op_MudDischarged_Volume%Last()) then ! Op_MudDischarged_Volume%Array(Op_MudDischarged_Volume%Length())= Op_MudDischarged_Volume%Array(Op_MudDischarged_Volume%Length()) - DeltaVolumeOp !else ! Op_MudDischarged_Volume%Array(Op_MudDischarged_Volume%Length()-1)= Op_MudDischarged_Volume%Array(Op_MudDischarged_Volume%Length()-1) - (DeltaVolumeOp-Op_MudDischarged_Volume%Last()) ! ! call Op_MudDischarged_Volume%Remove (Op_MudDischarged_Volume%Length()) ! call Op_Mud_Backhead_X%Remove (Op_MudDischarged_Volume%Length()) ! call Op_Mud_Backhead_section%Remove (Op_MudDischarged_Volume%Length()) ! call Op_Mud_Forehead_X%Remove (Op_MudDischarged_Volume%Length()) ! call Op_Mud_Forehead_section%Remove (Op_MudDischarged_Volume%Length()) ! call Op_Density%Remove (Op_MudDischarged_Volume%Length()) ! call Op_RemainedVolume_in_LastSection%Remove (Op_MudDischarged_Volume%Length()) ! call Op_EmptyVolume_inBackheadLocation%Remove (Op_MudDischarged_Volume%Length()) ! call Op_MudOrKick%Remove (Op_MudDischarged_Volume%Length()) !endif ! !============================= Bottom Hole ============================== !Op_MudDischarged_Volume%Array(1)= Op_MudDischarged_Volume%Array(1)+ ((GasKickPumpFlowRate/60.)*DeltaT_Mudline) !(gal) due to KickFlux imud=0 do while (imud < Op_Mud_Forehead_X%Length()) imud = imud + 1 if (imud> 1) then Op_Mud_Backhead_X%Array(imud)= Op_Mud_Forehead_X%Array(imud-1) Op_Mud_Backhead_section%Array(imud)= Op_Mud_Forehead_section%Array(imud-1) endif DirectionCoef= (Xend_OpSection(Op_Mud_Backhead_section%Array(imud))-Xstart_OpSection(Op_Mud_Backhead_section%Array(imud))) & / ABS(Xend_OpSection(Op_Mud_Backhead_section%Array(imud))-Xstart_OpSection(Op_Mud_Backhead_section%Array(imud))) ! +1 for string , -1 for annulus Op_EmptyVolume_inBackheadLocation%Array(imud)= DirectionCoef* (Xend_OpSection(Op_Mud_Backhead_section%Array(imud))- Op_Mud_Backhead_X%Array(imud))* & Area_OpSectionFt(Op_Mud_Backhead_section%Array(imud)) !(ft^3) Op_EmptyVolume_inBackheadLocation%Array(imud)= Op_EmptyVolume_inBackheadLocation%Array(imud)* 7.48051948d0 ! ft^3 to gal if ( Op_MudDischarged_Volume%Array(imud) <= Op_EmptyVolume_inBackheadLocation%Array(imud)) then Op_Mud_Forehead_section%Array(imud)= Op_Mud_Backhead_section%Array(imud) Op_Mud_Forehead_X%Array(imud)= Op_Mud_Backhead_X%Array(imud)+ DirectionCoef*(Op_MudDischarged_Volume%Array(imud)/7.48051948d0)/Area_OpSectionFt(Op_Mud_Backhead_section%Array(imud)) ! 7.48051948 is for gal to ft^3 else isection= Op_Mud_Backhead_section%Array(imud)+1 Op_RemainedVolume_in_LastSection%Array(imud)= Op_MudDischarged_Volume%Array(imud)- Op_EmptyVolume_inBackheadLocation%Array(imud) do if (isection > F_BottomHoleIntervalCounts) then ! last pipe section(well exit) if( imud==1) KickDeltaVinAnnulus= Op_RemainedVolume_in_LastSection%Array(imud) ! Kick enters Annulus space Op_MudDischarged_Volume%Array(imud)= Op_MudDischarged_Volume%Array(imud)- Op_RemainedVolume_in_LastSection%Array(imud) Op_Mud_Forehead_X%Array(imud)= Xend_OpSection(F_BottomHoleIntervalCounts) Op_Mud_Forehead_section%Array(imud)= F_BottomHoleIntervalCounts if (Op_MudDischarged_Volume%Array(imud)<= 0.0d0) then ! imud is completely exited form the well call RemoveOpMudArrays(imud) endif exit endif xx= Op_RemainedVolume_in_LastSection%Array(imud)/ OpSection_VolumeCapacity(isection) !(gal) if (xx<= 1.0) then Op_Mud_Forehead_section%Array(imud)= isection Op_Mud_Forehead_X%Array(imud)= (xx * (Xend_OpSection(isection)- Xstart_OpSection(isection)))+ Xstart_OpSection(isection) exit else Op_RemainedVolume_in_LastSection%Array(imud)= Op_RemainedVolume_in_LastSection%Array(imud)- OpSection_VolumeCapacity(isection) isection= isection+ 1 endif enddo endif if (Op_Mud_Forehead_X%Array(imud)== Xend_OpSection(F_BottomHoleIntervalCounts)) then totalLength = Op_MudDischarged_Volume%Length() do while(imud < totalLength) !imud = imud + 1 call RemoveOpMudArrays(totalLength) totalLength = totalLength - 1 enddo exit ! endif !WRITE(*,*) imud,'Op_MudDischarged_Volume%Array(imud)' , Op_MudDischarged_Volume%Array(imud), Op_Density%Array(imud) enddo !write(*,*) 'Op_Mud_Forehead_X%Length()' , Op_Mud_Forehead_X%Length() ! ! WRITE(*,*) 'Xend_PipeSection(F_StringIntervalCounts)' , Xend_PipeSection(F_StringIntervalCounts) ! WRITE(*,*) 'Op_Mud_Backhead_X%Array(1)' , Op_Mud_Backhead_X%Array(1) ! WRITE(*,*) 'Op_Mud_Forehead_X%Array(1)' , Op_Mud_Forehead_X%Array(1) ! WRITE(*,*) 'Op_Mud_Backhead_X%Array(2)' , Op_Mud_Backhead_X%Array(2) ! WRITE(*,*) 'Op_Mud_Forehead_X%Array(2)' , Op_Mud_Forehead_X%Array(2) !========================Bottom Hole END================= ! NO KICK !========================STRING ENTRANCE================= if ((ABS(St_Density%Last() - Ann_Density%First()) >= DensityMixTol) .OR. (DeltaVolumeOp == 0.0 .and. St_Density%Last() /= Ann_Density%Array(1) .and. StringFlowRate/=0.0d0)) then ! new mud is pumped !if ((ABS(StringDensity_Old - Ann_Density%First()) >= DensityMixTol) .OR. (DeltaVolumeOp == 0.0 .and. St_Density%Last() /= Ann_Density%Array(1) .and. StringFlowRate/=0.0d0)) then ! new mud is pumped call St_Density%Add (Ann_Density%First()) call St_MudDischarged_Volume%Add (0.0d0) call St_Mud_Forehead_X%Add (Xend_PipeSection(F_StringIntervalCounts)) call St_Mud_Forehead_section%Add (F_StringIntervalCounts) call St_Mud_Backhead_X%Add (Xstart_PipeSection(F_StringIntervalCounts)) call St_Mud_Backhead_section%Add (F_StringIntervalCounts) call St_RemainedVolume_in_LastSection%Add (0.0d0) call St_EmptyVolume_inBackheadLocation%Add (0.0d0) call St_MudOrKick%Add (0) !StringDensity_Old= Ann_Density%First() MudIsChanged= .true. endif St_MudDischarged_Volume%Array(St_MudDischarged_Volume%Length())= St_MudDischarged_Volume%Last()+ ((StringFlowRate/60.0d0)*DeltaT_Mudline) !(gal) !========================Tripping In==================== !write(*,*) 'DeltaVolumeOp=' , DeltaVolumeOp write(*,*) 'DeltaVolumeOp=' , DeltaVolumeOp if (DeltaVolumeOp > 0.0 .and. MudIsChanged== .false.) then !.and. DrillingMode== .false.) then ! trip in mode(loole paeen) !write(*,*) 'Tripping In' NewDensity= (Ann_Density%First()*((StringFlowRate/60.0d0)*DeltaT_Mudline)+Op_Density%Last()*DeltaVolumeOp)/(((StringFlowRate/60.0d0)*DeltaT_Mudline)+DeltaVolumeOp) NewVolume= ((StringFlowRate/60.0d0)*DeltaT_Mudline)+DeltaVolumeOp !write(*,*) 'St_MudDischarged_Volume%Last()=', St_MudDischarged_Volume%Last(), 'NewVolume=', NewVolume if (abs(St_Density%Last()-NewDensity)< DensityMixTol) then ! .OR. (St_MudDischarged_Volume%Last()< 42.) ) then !+ NewVolume)< 42.) then ! 1-Pockets are Merged St_Density%Array(St_Density%Length())= (St_Density%Last()*St_MudDischarged_Volume%Last()+NewDensity*NewVolume)/(St_MudDischarged_Volume%Last()+NewVolume) St_MudDischarged_Volume%Array(St_Density%Length())= St_MudDischarged_Volume%Last()+DeltaVolumeOp St_Mud_Forehead_X%Array(St_Density%Length())= (Xend_PipeSection(F_StringIntervalCounts)) St_Mud_Forehead_section%Array(St_Density%Length())= (F_StringIntervalCounts) St_Mud_Backhead_X%Array(St_Density%Length())= (Xstart_PipeSection(F_StringIntervalCounts)) St_Mud_Backhead_section%Array(St_Density%Length())= (F_StringIntervalCounts) St_RemainedVolume_in_LastSection%Array(St_Density%Length())= (0.0d0) St_EmptyVolume_inBackheadLocation%Array(St_Density%Length())= (0.0d0) else ! 2-Merging conditions are not meeted, so new pocket call St_Density%Add (NewDensity) call St_MudDischarged_Volume%Add (NewVolume) call St_Mud_Forehead_X%Add (Xend_PipeSection(F_StringIntervalCounts)) call St_Mud_Forehead_section%Add (F_StringIntervalCounts) call St_Mud_Backhead_X%Add (Xstart_PipeSection(F_StringIntervalCounts)) call St_Mud_Backhead_section%Add (F_StringIntervalCounts) call St_RemainedVolume_in_LastSection%Add (0.0d0) call St_EmptyVolume_inBackheadLocation%Add (0.0d0) call St_MudOrKick%Add (0) endif elseif (DeltaVolumeOp > 0.0 .and. MudIsChanged== .true.) then St_Density%Array(St_Density%Length())= NewDensity St_MudDischarged_Volume%Array(St_Density%Length())= NewVolume St_Mud_Forehead_X%Array(St_Density%Length())= (Xend_PipeSection(F_StringIntervalCounts)) St_Mud_Forehead_section%Array(St_Density%Length())= (F_StringIntervalCounts) St_Mud_Backhead_X%Array(St_Density%Length())= (Xstart_PipeSection(F_StringIntervalCounts)) St_Mud_Backhead_section%Array(St_Density%Length())= (F_StringIntervalCounts) St_RemainedVolume_in_LastSection%Array(St_Density%Length())= (0.0d0) St_EmptyVolume_inBackheadLocation%Array(St_Density%Length())= (0.0d0) endif !========================Tripping In - End==================== !======================== STRING ==================== MudIsChanged= .false. imud= St_Mud_Forehead_X%Length() + 1 do while (imud > 1) imud = imud - 1 if (imud< St_Mud_Forehead_X%Length()) then St_Mud_Forehead_X%Array(imud)= St_Mud_Backhead_X%Array(imud+1) St_Mud_Forehead_section%Array(imud)= St_Mud_Backhead_section%Array(imud+1) endif DirectionCoef= (Xend_PipeSection(St_Mud_Forehead_section%Array(imud))-Xstart_PipeSection(St_Mud_Forehead_section%Array(imud))) & / ABS(Xend_PipeSection(St_Mud_Forehead_section%Array(imud))-Xstart_PipeSection(St_Mud_Forehead_section%Array(imud))) ! +1 for string , -1 for annulus St_EmptyVolume_inBackheadLocation%Array(imud)= DirectionCoef* (St_Mud_Forehead_X%Array(imud)- Xstart_PipeSection(St_Mud_Forehead_section%Array(imud)))* & Area_PipeSectionFt(St_Mud_Backhead_section%Array(imud)) !(ft^3) St_EmptyVolume_inBackheadLocation%Array(imud)= St_EmptyVolume_inBackheadLocation%Array(imud)* 7.48051948d0 ! ft^3 to gal if ( St_MudDischarged_Volume%Array(imud) <= St_EmptyVolume_inBackheadLocation%Array(imud)) then St_Mud_Backhead_section%Array(imud)= St_Mud_Forehead_section%Array(imud) St_Mud_Backhead_X%Array(imud)= St_Mud_Forehead_X%Array(imud)- DirectionCoef*(St_MudDischarged_Volume%Array(imud)/7.48051948d0)/Area_PipeSectionFt(St_Mud_Forehead_section%Array(imud)) ! 7.48051948 is for gal to ft^3 else isection= St_Mud_Backhead_section%Array(imud)-1 St_RemainedVolume_in_LastSection%Array(imud)= St_MudDischarged_Volume%Array(imud)- St_EmptyVolume_inBackheadLocation%Array(imud) do if (isection < 1) then ! last pipe section(string exit) St_MudDischarged_Volume%Array(imud)= St_MudDischarged_Volume%Array(imud)- St_RemainedVolume_in_LastSection%Array(imud) St_Mud_Backhead_X%Array(imud)= Xstart_PipeSection(2) St_Mud_Backhead_section%Array(imud)= 2 if (St_MudDischarged_Volume%Array(imud)<= 0.0d0) then ! imud is completely exited form the string call RemoveStringMudArrays(imud) endif exit endif xx= St_RemainedVolume_in_LastSection%Array(imud)/ PipeSection_VolumeCapacity(isection) !(gal) if (xx<= 1.0) then St_Mud_Backhead_section%Array(imud)= isection St_Mud_Backhead_X%Array(imud)= (xx * (Xstart_PipeSection(isection)- Xend_PipeSection(isection)))+ Xend_PipeSection(isection) exit else St_RemainedVolume_in_LastSection%Array(imud)= St_RemainedVolume_in_LastSection%Array(imud)- PipeSection_VolumeCapacity(isection) isection= isection- 1 endif enddo endif enddo !========================STRING END================= end subroutine Utube2_and_TripIn