Hi I have a field named 'product_description' I want to display it in the quotation for that I also want that field to be in sale order and invoice as well. 

I have started by inheriting sale.order.line and corresponding view sale.view_order_form

<record model="ir.ui.view" id="view_order_form_inherit1">
      <field name="name">view.order.form.inherit1</field>
      <field name="model">sale.order</field>
      <field name="inherit_id" ref="sale.view_order_form"/>
      <field name="arch" type="xml">
      <xpath expr="/form/sheet/notebook/page/field[@name='order_line']/tree/field[@name='name']" position="after">
          <field name="product_description"/>
      </xpath>
      <xpath expr="/form/sheet/notebook/page/field[@name='order_line']/tree/field[@name='name']" position="attributes">
         <attribute name="invisible">True</attribute>
      </xpath>
 </field>
 </record>

Field appeared right after Product in sale order form.

Similarly for quotation template

<record model="ir.ui.view" id="sale_order_template_view_inherit">
 <field name="name">sale.order.template.view.inherit1</field>
 <field name="model">sale.order.template</field>
 <field name="inherit_id" ref="sale_management.sale_order_template_view_form"/>
 <field name="arch" type="xml">
    <xpath expr="//notebook[@name='main_book']//tree//field[@name='name']" position="after">
         <field name='product_description'/>
     </xpath>
     <xpath expr="//notebook[@name='main_book']//tree//field[@name='name']" position="attributes">
        <attribute name='invisible'>True</attribute>
     </xpath>
 </field>

But when I am creating quotation and selecting quotation template that product description is not getting fitted in sale order line.