<xs:simpleType name="BitReasonPulled">
  <xs:annotation>
    <xs:documentation>Specifies the reason for pulling a drill bit from the wellbore, these codes were originally defined by the IADC.</xs:documentation>
  </xs:annotation>
  <xs:restriction base="eml:TypeEnum">
    <xs:enumeration value="BHA">
      <xs:annotation>
        <xs:documentation>Change Bottom Hole Assembly</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="CM">
      <xs:annotation>
        <xs:documentation>Condition Mud</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="CP">
      <xs:annotation>
        <xs:documentation>Core Point</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="DMF">
      <xs:annotation>
        <xs:documentation>Downhole Motor Failure</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="DP">
      <xs:annotation>
        <xs:documentation>Drill Plug</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="DST">
      <xs:annotation>
        <xs:documentation>Drill Stem Test</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="DTF">
      <xs:annotation>
        <xs:documentation>Downhole Tool Failure</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="FM">
      <xs:annotation>
        <xs:documentation>Formation Change</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="HP">
      <xs:annotation>
        <xs:documentation>Hole Problems</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="HR">
      <xs:annotation>
        <xs:documentation>Hours on Bit</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="LOG">
      <xs:annotation>
        <xs:documentation>Run Logs</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="PP">
      <xs:annotation>
        <xs:documentation>Pump Pressure</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="PR">
      <xs:annotation>
        <xs:documentation>Penetration Rate</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="RIG">
      <xs:annotation>
        <xs:documentation>Rig Repairs</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="TD">
      <xs:annotation>
        <xs:documentation>Total Depth/Casing Depth</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="TQ">
      <xs:annotation>
        <xs:documentation>Torque</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="TW">
      <xs:annotation>
        <xs:documentation>Twist Off</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="WC">
      <xs:annotation>
        <xs:documentation>Weather Conditions</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
  </xs:restriction>
</xs:simpleType>