-<xsd:schema elementFormDefault="qualified" attributeFormDefault="unqualified" targetNamespace="http://www.witsml.org/schemas/131" 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="cs_bop.xsd"/>
 <xsd:include schemaLocation="cs_pit.xsd"/>
 <xsd:include schemaLocation="cs_pump.xsd"/>
 <xsd:include schemaLocation="cs_shaker.xsd"/>
 <xsd:include schemaLocation="cs_centrifuge.xsd"/>
 <xsd:include schemaLocation="cs_hydrocyclone.xsd"/>
 <xsd:include schemaLocation="cs_degasser.xsd"/>
 <xsd:include schemaLocation="cs_surfaceEquipment.xsd"/>
<!--
 -->
-<xsd:group name="grp_rig">
-<xsd:annotation>
 <xsd:documentation>The non-contextual content of a WITSML Rig object.</xsd:documentation>
 </xsd:annotation>
-<xsd:sequence>
-<xsd:element name="owner" type="witsml:str32" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Contractor/owner. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="typeRig" type="witsml:RigType" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Rig type. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="manufacturer" type="witsml:nameString" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Manufacturer / supplier of the item. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="yearEntService" type="witsml:calendarYear" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Year entered service (CCYY). </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="classRig" type="witsml:str32" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Rig classification. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="approvals" type="witsml:nameString" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Rig approvals/certification. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="registration" type="witsml:str32" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Rig registration location. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="telNumber" type="witsml:str32" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Rig telephone number. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="faxNumber" type="witsml:str32" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Rig fax number. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="emailAddress" type="witsml:nameString" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Rig Email address. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="nameContact" type="witsml:nameString" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Name of contact person. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="ratingDrillDepth" type="witsml:lengthMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Maximum hole depth rating for the rig. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="ratingWaterDepth" type="witsml:lengthMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Working water depth capability of rig. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="isOffshore" type="witsml:logicalBoolean" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Flag to indicate that rig is an offshore rig (Drill Ship, Semi, Jack-up, Platform, TADU). Values are "true" (or "1") and "false" (or "0").</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="airGap" type="witsml:lengthMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Air gap from Rig Floor to ground or mean sea level depending on location. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="dTimStartOp" type="witsml:timestamp" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Date and time rig operations started, or date and time object created. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="dTimEndOp" type="witsml:timestamp" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Date and time rig operations ended (May be NULL for active rig). </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="bop" type="witsml:cs_bop" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Blow out preventer description and components. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="pit" type="witsml:cs_pit" minOccurs="0" maxOccurs="unbounded">
-<xsd:annotation>
 <xsd:documentation>Pit equipment for the rig. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="pump" type="witsml:cs_pump" minOccurs="0" maxOccurs="unbounded">
-<xsd:annotation>
 <xsd:documentation>Drilling fluid (mud/cement) pumping units for the rig. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="shaker" type="witsml:cs_shaker" minOccurs="0" maxOccurs="unbounded">
-<xsd:annotation>
 <xsd:documentation>Mud cleaning shaker equipment for the rig. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="centrifuge" type="witsml:cs_centrifuge" minOccurs="0" maxOccurs="unbounded">
-<xsd:annotation>
 <xsd:documentation>Mud cleaning centrifuge equipment for the rig. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="hydrocyclone" type="witsml:cs_hydrocyclone" minOccurs="0" maxOccurs="unbounded">
-<xsd:annotation>
 <xsd:documentation>Mud cleaning hydrocyclone equipment for the rig. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="degasser" type="witsml:cs_degasser" minOccurs="0" maxOccurs="unbounded">
-<xsd:annotation>
 <xsd:documentation>Mud de-gasser equipment for the rig. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="surfaceEquipment" type="witsml:cs_surfaceEquipment" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Coiled tubing specific equipment configuration. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="numDerricks" type="witsml:nonNegativeCount" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Number of derricks on the rig. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="typeDerrick" type="witsml:DerrickType" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Derrick type. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="ratingDerrick" type="witsml:forceMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Maximum support load applied to derrick structure. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="htDerrick" type="witsml:lengthMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Height of derrick. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="ratingHkld" type="witsml:forceMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Maximum hookload rating. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="capWindDerrick" type="witsml:velocityMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Derrick wind capacity. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="wtBlock" type="witsml:forceMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Block weight. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="ratingBlock" type="witsml:forceMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Weight rating of the travelling block. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="numBlockLines" type="witsml:nonNegativeCount" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Number of block lines. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="typeHook" type="witsml:str32" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Type of hook. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="ratingHook" type="witsml:forceMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Weight rating of the hook. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="sizeDrillLine" type="witsml:lengthMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Drill line diameter. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="typeDrawWorks" type="witsml:DrawWorksType" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Draw-works type. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="powerDrawWorks" type="witsml:powerMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Draw works horse power. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="ratingDrawWorks" type="witsml:forceMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Weight rating of the drawworks. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="motorDrawWorks" type="witsml:str32" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Description of the drawworks motor. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="descBrake" type="witsml:str32" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Rig brake description. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="typeSwivel" type="witsml:str32" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Type of Swivel. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="ratingSwivel" type="witsml:forceMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Maximum swivel rating. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="rotSystem" type="witsml:DriveType" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Work string drive type. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="descRotSystem" type="witsml:str32" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Description of rotating system. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="ratingTqRotSys" type="witsml:momentOfForceMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Work string rotational torque rating. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="rotSizeOpening" type="witsml:lengthMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Rotary size opening. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="ratingRotSystem" type="witsml:forceMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Work string rotational torque rating. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="scrSystem" type="witsml:str32" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Description of slow circulation rates system. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="pipeHandlingSystem" type="witsml:str32" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Name of pipe handling system. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="capBulkMud" type="witsml:volumeMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Bulk/dry mud storage capacity. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="capLiquidMud" type="witsml:volumeMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Liquid mud storage capacity. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="capDrillWater" type="witsml:volumeMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Drill water capacity. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="capPotableWater" type="witsml:volumeMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Potable water capacity. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="capFuel" type="witsml:volumeMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Fuel capacity. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="capBulkCement" type="witsml:volumeMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Capacity of builk cement. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="mainEngine" type="witsml:nameString" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Power system. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="generator" type="witsml:shortDescriptionString" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Description of the electrical power generating system. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="cementUnit" type="witsml:str32" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Name of cement unit on the rig. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="numBunks" type="witsml:nonNegativeCount" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Number of beds available on the rig. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="bunksPerRoom" type="witsml:nonNegativeCount" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Number of bunks per room. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="numCranes" type="witsml:nonNegativeCount" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Number of cranes on the rig. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="numAnch" type="witsml:nonNegativeCount" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Number of anchors. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="moorType" type="witsml:str32" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Mooring type. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="numGuideTens" type="witsml:nonNegativeCount" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Number of guideline tensioners. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="numRiserTens" type="witsml:nonNegativeCount" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Number of riser tensioners. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="varDeckLdMx" type="witsml:forceMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Variable deck load maximum (offshore rigs only). </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="vdlStorm" type="witsml:forceMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Variable deck load storm rating (offshore rigs only). </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="numThrusters" type="witsml:nonNegativeCount" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Number of thrusters. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="azimuthing" type="witsml:logicalBoolean" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Are the thrusters azimuth. Values are "true" (or "1") and "false" (or "0").</xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="motionCompensationMn" type="witsml:forceMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Minimum motion compensation. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="motionCompensationMx" type="witsml:forceMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Maximum motion compensation. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="strokeMotionCompensation" type="witsml:lengthMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Length of motion compensation provided by equipment. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="riserAngleLimit" type="witsml:planeAngleMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Riser angle limit. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="heaveMx" type="witsml:lengthMeasure" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Maximum allowable heave. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="gantry" type="witsml:shortDescriptionString" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Description of gantry. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
-<xsd:element name="flares" type="witsml:shortDescriptionString" minOccurs="0" maxOccurs="1">
-<xsd:annotation>
 <xsd:documentation>Description of flare. </xsd:documentation>
 </xsd:annotation>
 </xsd:element>
 </xsd:sequence>
 </xsd:group>
 </xsd:schema>