-<xsd:schema elementFormDefault="qualified" attributeFormDefault="unqualified" targetNamespace="http://www.witsml.org/schemas/131/addendum/combo" version="1.3.1">
<!--
                                                         
 -->
<!--
 POSC License Agreement
	This file is distributed under the POSC License Agreement at
	http://www.posc.org/about/license.shtml.
	Use of this file constitutes agreement with the POSC License Agreement.
	
 -->
<!--
                                                         
 -->
 <xsd:include schemaLocation="typ_dataTypes.xsd"/>
<!--
                                                         
 -->
-<xsd:complexType name="cs_wellheadData">
-<xsd:annotation>
 <xsd:documentation>Basic measurements at the wellhead, during the well test.</xsd:documentation>
 </xsd:annotation>
-<xsd:sequence>
-<xsd:element name="temperature" type="witsml:thermodynamicTemperatureMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The temperature measured at the wellhead during the well test.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="flowingPressure" type="witsml:pressureMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The flowing pressure measured at the wellhead during the well test.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="shutInPressure" type="witsml:pressureMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The shut-in pressure measured at the wellhead during the well test.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="flowLinePressure" type="witsml:pressureMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>The pressure measured at the flow line connected to the wellhead during this well test.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="chokeOrificeSize" type="witsml:lengthMeasure">
-<xsd:annotation>
 <xsd:documentation>The size of the choke opening at the wellhead.</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
 </xsd:sequence>
 </xsd:complexType>
<!--
                                                         
 -->
 </xsd:schema>