diff --git a/ApplicationCode/ProjectDataModel/RimWellPath.cpp b/ApplicationCode/ProjectDataModel/RimWellPath.cpp
index 9e9ab26e2b..57c0db8f0f 100644
--- a/ApplicationCode/ProjectDataModel/RimWellPath.cpp
+++ b/ApplicationCode/ProjectDataModel/RimWellPath.cpp
@@ -171,6 +171,16 @@ RimFishbonesCollection* RimWellPath::fishbonesCollection()
     return m_completions->fishbonesCollection();
 }
 
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+const RimFishbonesCollection * RimWellPath::fishbonesCollection() const
+{
+    CVF_ASSERT(m_completions);
+
+    return m_completions->fishbonesCollection();
+}
+
 //--------------------------------------------------------------------------------------------------
 /// 
 //--------------------------------------------------------------------------------------------------
@@ -181,6 +191,16 @@ RimPerforationCollection* RimWellPath::perforationIntervalCollection()
     return m_completions->perforationCollection();
 }
 
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+const RimPerforationCollection* RimWellPath::perforationIntervalCollection() const
+{
+    CVF_ASSERT(m_completions);
+
+    return m_completions->perforationCollection();
+}
+
 //--------------------------------------------------------------------------------------------------
 /// 
 //--------------------------------------------------------------------------------------------------
@@ -189,6 +209,14 @@ RigWellPath* RimWellPath::wellPathGeometry()
     return m_wellPath.p();
 }
 
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+const RigWellPath * RimWellPath::wellPathGeometry() const
+{
+    return m_wellPath.p();
+}
+
 //--------------------------------------------------------------------------------------------------
 /// 
 //--------------------------------------------------------------------------------------------------
diff --git a/ApplicationCode/ProjectDataModel/RimWellPath.h b/ApplicationCode/ProjectDataModel/RimWellPath.h
index 239c3f800a..39557b1bed 100644
--- a/ApplicationCode/ProjectDataModel/RimWellPath.h
+++ b/ApplicationCode/ProjectDataModel/RimWellPath.h
@@ -76,9 +76,12 @@ public:
     caf::PdmChildField<RimWellLogFile*> m_wellLogFile;
 
     RimFishbonesCollection*             fishbonesCollection();
+    const RimFishbonesCollection*       fishbonesCollection() const;
     RimPerforationCollection*           perforationIntervalCollection();
+    const RimPerforationCollection*     perforationIntervalCollection() const;
 
     RigWellPath*                        wellPathGeometry();
+    const RigWellPath*                  wellPathGeometry() const;
     RivWellPathPartMgr*                 partMgr();
 
     bool                                readWellPathFile(QString * errorMessage, RifWellPathImporter* wellPathImporter);
diff --git a/ApplicationCode/ReservoirDataModel/RigWellPath.cpp b/ApplicationCode/ReservoirDataModel/RigWellPath.cpp
index ea4d77351c..46fe2385b4 100644
--- a/ApplicationCode/ReservoirDataModel/RigWellPath.cpp
+++ b/ApplicationCode/ReservoirDataModel/RigWellPath.cpp
@@ -57,7 +57,7 @@ double RigWellPath::datumElevation() const
 //--------------------------------------------------------------------------------------------------
 /// 
 //--------------------------------------------------------------------------------------------------
-cvf::Vec3d RigWellPath::interpolatedPointAlongWellPath(double measuredDepth)
+cvf::Vec3d RigWellPath::interpolatedPointAlongWellPath(double measuredDepth) const
 {
     cvf::Vec3d wellPathPoint = cvf::Vec3d::ZERO;
 
diff --git a/ApplicationCode/ReservoirDataModel/RigWellPath.h b/ApplicationCode/ReservoirDataModel/RigWellPath.h
index 1d4c60de9c..f09603fec8 100644
--- a/ApplicationCode/ReservoirDataModel/RigWellPath.h
+++ b/ApplicationCode/ReservoirDataModel/RigWellPath.h
@@ -40,7 +40,7 @@ public:
     void                        setDatumElevation(double value);
     bool                        hasDatumElevation() const;
     double                      datumElevation() const;
-    cvf::Vec3d                  interpolatedPointAlongWellPath(double measuredDepth);
+    cvf::Vec3d                  interpolatedPointAlongWellPath(double measuredDepth) const;
     double                      wellPathAzimuthAngle(const cvf::Vec3d& position) const;
     void                        twoClosestPoints(const cvf::Vec3d& position, cvf::Vec3d* p1, cvf::Vec3d* p2) const;
     std::vector<cvf::Vec3d>     clippedPointSubset(double startMD, double endMD) const;
diff --git a/Fwk/AppFwk/cafProjectDataModel/cafPdmCore/cafPdmChildArrayField.h b/Fwk/AppFwk/cafProjectDataModel/cafPdmCore/cafPdmChildArrayField.h
index 665c6a60c0..d58acfdce9 100644
--- a/Fwk/AppFwk/cafProjectDataModel/cafPdmCore/cafPdmChildArrayField.h
+++ b/Fwk/AppFwk/cafProjectDataModel/cafPdmCore/cafPdmChildArrayField.h
@@ -54,6 +54,7 @@ public:
     virtual ~PdmChildArrayField();
 
     PdmChildArrayField&   operator() () { return *this; }
+    const PdmChildArrayField& operator() () const { return *this; }
 
     // Reimplementation of PdmPointersFieldHandle methods