diff --git a/src/main/java/gregtech/common/tileentities/machines/multi/GT_MetaTileEntity_DrillerBase.java b/src/main/java/gregtech/common/tileentities/machines/multi/GT_MetaTileEntity_DrillerBase.java
index bb0aaaee..9c05c58d 100644
--- a/src/main/java/gregtech/common/tileentities/machines/multi/GT_MetaTileEntity_DrillerBase.java
+++ b/src/main/java/gregtech/common/tileentities/machines/multi/GT_MetaTileEntity_DrillerBase.java
@@ -160,7 +160,7 @@ public abstract class GT_MetaTileEntity_DrillerBase extends GT_MetaTileEntity_Mu
     }
 
     protected boolean reachingVoidOrBedrock() {
-    	return yHead <= 0 || checkBlockAndMeta(xPipe, yHead - 1, zPipe, Blocks.bedrock, 0);
+    	return yHead <= 0 || checkBlockAndMeta(xPipe, yHead - 1, zPipe, Blocks.bedrock, W);
     }
 
     private boolean isHasMiningPipes() {
diff --git a/src/main/java/gregtech/common/tileentities/machines/multi/GT_MetaTileEntity_OilDrillBase.java b/src/main/java/gregtech/common/tileentities/machines/multi/GT_MetaTileEntity_OilDrillBase.java
index 068b09db..6e7c0f4f 100644
--- a/src/main/java/gregtech/common/tileentities/machines/multi/GT_MetaTileEntity_OilDrillBase.java
+++ b/src/main/java/gregtech/common/tileentities/machines/multi/GT_MetaTileEntity_OilDrillBase.java
@@ -90,7 +90,7 @@ public abstract class GT_MetaTileEntity_OilDrillBase extends GT_MetaTileEntity_D
     	case 3: workState = STATE_UPWARD; return true;
     	}
     	
-    	if (!reachingVoidOrBedrock() && tryFillChunkList()) {
+    	if (reachingVoidOrBedrock() && tryFillChunkList()) {
     		float speed = .5F+(GT_Utility.getTier(getMaxInputVoltage()) - getMinTier()) *.25F;
             FluidStack tFluid = pumpOil(speed);
             if (tFluid != null && tFluid.amount > getTotalConfigValue()){