stock_view.xml

<?xml version="1.0" encoding="UTF-8"?>
<openerp>
    <data>
        <record id="view_picking_form_ext" model="ir.ui.view">
            <field name="name">Incoming Picking Inherited</field>
            <field name="model">stock.picking.in</field>
            <field name="inherit_id" ref="stock.view_picking_form"/>
            <field name="arch" type="xml">
                <xpath expr="//field[@name='origin']" position="after">
                    <field name="ref_order_id" options="{'limit': 10, 'create': false, 'create_edit': false}"/>
                    <field name="ref_project_name"/>
                </xpath>
            </field>
        </record>
	</data>
</openerp>