diff --git a/src/xlsx/xlsxpackage.cpp b/src/xlsx/xlsxpackage.cpp
index a3da444..6958c2c 100644
--- a/src/xlsx/xlsxpackage.cpp
+++ b/src/xlsx/xlsxpackage.cpp
@@ -180,22 +180,14 @@ void Package::writeWorksheetFiles(ZipWriter &zipWriter)
         if (sheet->isChartsheet())
             continue;
 
-        QByteArray data;
-        QBuffer buffer(&data);
-        buffer.open(QIODevice::WriteOnly);
-        sheet->saveToXmlFile(&buffer);
-        zipWriter.addFile(QStringLiteral("xl/worksheets/sheet%1.xml").arg(index), data);
+        zipWriter.addFile(QStringLiteral("xl/worksheets/sheet%1.xml").arg(index), sheet->saveToXmlData());
         index += 1;
     }
 }
 
 void Package::writeWorkbookFile(ZipWriter &zipWriter)
 {
-    QByteArray data;
-    QBuffer buffer(&data);
-    buffer.open(QIODevice::WriteOnly);
-    m_workbook->saveToXmlFile(&buffer);
-    zipWriter.addFile(QStringLiteral("xl/workbook.xml"), data);
+    zipWriter.addFile(QStringLiteral("xl/workbook.xml"), m_workbook->saveToXmlData());
 }
 
 void Package::writeDrawingFiles(ZipWriter &zipWriter)
diff --git a/src/xlsx/xlsxworksheet.cpp b/src/xlsx/xlsxworksheet.cpp
index 986b716..b1ad808 100755
--- a/src/xlsx/xlsxworksheet.cpp
+++ b/src/xlsx/xlsxworksheet.cpp
@@ -38,6 +38,7 @@
 #include <QUrl>
 #include <QRegularExpression>
 #include <QDebug>
+#include <QBuffer>
 
 #include <stdint.h>
 
@@ -83,6 +84,9 @@ WorksheetPrivate::~WorksheetPrivate()
 
     foreach (XlsxColumnInfo *col, colsInfo)
         delete col;
+
+    if (drawing)
+        delete drawing;
 }
 
 /*
@@ -202,11 +206,11 @@ int WorksheetPrivate::checkDimensions(int row, int col, bool ignore_row, bool ig
  * \param index Index of the worksheet in the workbook
  * \param parent
  */
-Worksheet::Worksheet(const QString &name, Workbook *parent) :
-    QObject(parent), d_ptr(new WorksheetPrivate(this))
+Worksheet::Worksheet(const QString &name, Workbook *workbook) :
+    d_ptr(new WorksheetPrivate(this))
 {
     d_ptr->name = name;
-    d_ptr->workbook = parent;
+    d_ptr->workbook = workbook;
 }
 
 Worksheet::~Worksheet()
@@ -877,7 +881,7 @@ void Worksheet::prepareImage(int index, int image_id, int drawing_id)
 {
     Q_D(Worksheet);
     if (!d->drawing) {
-        d->drawing = new Drawing(this);
+        d->drawing = new Drawing;
         d->drawing->embedded = true;
         d->externDrawingList.append(QStringLiteral("../drawings/drawing%1.xml").arg(drawing_id));
     }
@@ -1038,4 +1042,28 @@ XlsxObjectPositionData WorksheetPrivate::pixelsToEMUs(const XlsxObjectPositionDa
     return result;
 }
 
+QByteArray Worksheet::saveToXmlData()
+{
+    QByteArray data;
+    QBuffer buffer(&data);
+    buffer.open(QIODevice::WriteOnly);
+    saveToXmlFile(&buffer);
+
+    return data;
+}
+
+QSharedPointer<Worksheet> Worksheet::loadFromXmlFile(QIODevice *device)
+{
+    return QSharedPointer<Worksheet>(new Worksheet(QString()));
+}
+
+QSharedPointer<Worksheet> Worksheet::loadFromXmlData(const QByteArray &data)
+{
+    QBuffer buffer;
+    buffer.setData(data);
+    buffer.open(QIODevice::ReadOnly);
+
+    return loadFromXmlFile(&buffer);
+}
+
 } //namespace
diff --git a/src/xlsx/xlsxworksheet.h b/src/xlsx/xlsxworksheet.h
index 4a254c7..abf5ade 100755
--- a/src/xlsx/xlsxworksheet.h
+++ b/src/xlsx/xlsxworksheet.h
@@ -31,6 +31,7 @@
 #include <QMap>
 #include <QVariant>
 #include <QPointF>
+#include <QSharedPointer>
 class QIODevice;
 class QDateTime;
 class QUrl;
@@ -45,9 +46,8 @@ class Drawing;
 struct XlsxImageData;
 
 class WorksheetPrivate;
-class Q_XLSX_EXPORT Worksheet : public QObject
+class Q_XLSX_EXPORT Worksheet
 {
-    Q_OBJECT
     Q_DECLARE_PRIVATE(Worksheet)
 public:
     int write(const QString row_column, const QVariant &value, Format *format=0);
@@ -74,11 +74,15 @@ public:
     void setZeroValuesHidden(bool enable);
 
     void saveToXmlFile(QIODevice *device);
+    QByteArray saveToXmlData();
+    static QSharedPointer<Worksheet> loadFromXmlFile(QIODevice *device);
+    static QSharedPointer<Worksheet> loadFromXmlData(const QByteArray &data);
+
     ~Worksheet();
 private:
     friend class Package;
     friend class Workbook;
-    Worksheet(const QString &sheetName, Workbook *parent=0);
+    Worksheet(const QString &sheetName, Workbook *book=0);
 
     virtual bool isChartsheet() const;
     QString name() const;