<xs:simpleType name="BitDullCode">
  <xs:annotation>
    <xs:documentation>Specifies the reason a drill bit was declared inoperable; these codes were originally defined by the IADC.</xs:documentation>
  </xs:annotation>
  <xs:restriction base="eml:TypeEnum">
    <xs:enumeration value="BC">
      <xs:annotation>
        <xs:documentation>Broken Cone</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="BT">
      <xs:annotation>
        <xs:documentation>Broken teeth/cutters</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="BU">
      <xs:annotation>
        <xs:documentation>Balled Up</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="CC">
      <xs:annotation>
        <xs:documentation>Cracked Cone</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="CD">
      <xs:annotation>
        <xs:documentation>Cone Dragged</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="CI">
      <xs:annotation>
        <xs:documentation>Cone Interference</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="CR">
      <xs:annotation>
        <xs:documentation>Cored</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="CT">
      <xs:annotation>
        <xs:documentation>Chipped Teeth</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="ER">
      <xs:annotation>
        <xs:documentation>Erosion</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="FC">
      <xs:annotation>
        <xs:documentation>Flat Crested Wear</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="HC">
      <xs:annotation>
        <xs:documentation>Heat Checking</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="JD">
      <xs:annotation>
        <xs:documentation>Junk Damage</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="LC">
      <xs:annotation>
        <xs:documentation>Lost Cone</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="LN">
      <xs:annotation>
        <xs:documentation>Lost Nozzle</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="LT">
      <xs:annotation>
        <xs:documentation>Lost Teeth/Cutters</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="NO">
      <xs:annotation>
        <xs:documentation>No Dull/No Other Wear</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="OC">
      <xs:annotation>
        <xs:documentation>Off-Center Wear</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="PB">
      <xs:annotation>
        <xs:documentation>Pinched Bit</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="PN">
      <xs:annotation>
        <xs:documentation>Plugged Nozzle</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="RG">
      <xs:annotation>
        <xs:documentation>Rounded Gauge</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="RO">
      <xs:annotation>
        <xs:documentation>Ring Out</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="SD">
      <xs:annotation>
        <xs:documentation>Shirttail Damage</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="SS">
      <xs:annotation>
        <xs:documentation>Self-Sharpening Wear</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="TR">
      <xs:annotation>
        <xs:documentation>Tracking</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="WO">
      <xs:annotation>
        <xs:documentation>WashOut on Bit</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
    <xs:enumeration value="WT">
      <xs:annotation>
        <xs:documentation>Worn Teeth/Cutters</xs:documentation>
      </xs:annotation>
    </xs:enumeration>
  </xs:restriction>
</xs:simpleType>