12.2.3 DrillingParams

Topic Version	1	Published	11/11/2016	Topic Change History
For Standard	WITSML v2.0
Type:	Class		Stereotype:	«XSDcomplexType»

The bottomhole assembly drilling parameters schema, which contains statistical and calculated operations data for the run, related to depths, activities, temperature, pressure, flow rates, torque, etc.

Table 12.2.3-1 Attributes
Name	Type	Notes
AziBottom	PlaneAngleMeasure	Azimuth at stop measured depth.
AziTop	PlaneAngleMeasure	Azimuth at start measured depth.
Comments	String2000	Comments and remarks.
CTimCirc	TimeMeasure	Time spent circulating from start of bit run.
CTimDrillRot	TimeMeasure	Time spent rotary drilling from start of bit run.
CTimDrillSlid	TimeMeasure	Time spent slide drilling from start of bit run.
CTimHold	TimeMeasure	Time spent on hold from start of bit run.
CTimReam	TimeMeasure	Time spent reaming from start of bit run.
CTimSteering	TimeMeasure	Time spent steering from start of bit run.
DistDrillRot	LengthMeasure	Distance drilled - rotating.
DistDrillSlid	LengthMeasure	Distance drilled - sliding
DistHold	LengthMeasure	Distance covered while holding angle with a steerable drilling assembly.
DistReam	LengthMeasure	Distance reamed.
DistSteering	LengthMeasure	Distance covered while actively steering with a steerable drilling assembly.
ETimOpBit	TimeMeasure	Operating time spent by bit for run. BUSINESS RULE: When reporting an actual as opposed to design, this is required.
ExtensionNameValue	ExtensionNameValue	Extensions to the schema based on a name-value construct.
FlowrateBit	VolumePerTimeMeasure	Flow rate at bit.
FlowratePumpAv	VolumePerTimeMeasure	Average mud pump flow rate.
FlowratePumpMn	VolumePerTimeMeasure	Minimum mud pump flow rate.
FlowratePumpMx	VolumePerTimeMeasure	Maximum mud pump flow rate.
HkldDn	ForceMeasure	Hookload when the string is moving down.
HkldRot	ForceMeasure	Hookload: rotating.
HkldUp	ForceMeasure	Hookload when the string is moving up.
InclMn	PlaneAngleMeasure	Minimum inclination.
InclMx	PlaneAngleMeasure	Maximum inclination.
InclStart	PlaneAngleMeasure	Inclination at start measured depth.
InclStop	PlaneAngleMeasure	Inclination at stop measured depth.
MdHoleStart	MeasuredDepthCoord	Measured depth at start of the run.
MdHoleStop	MeasuredDepthCoord	Measured depth at the end of the run.
MudClass	MudClass	The class of the drilling fluid.
MudSubClass	MudSubClass	Mud Subtype at event occurrence.
ObjectiveBha	String2000	Objective of bottom hole assembly.
OverPull	ForceMeasure	Overpull = HkldUp - HkldRot
PowBit	PowerMeasure	Bit hydraulic.
PresDropBit	PressureMeasure	Pressure drop in bit.
PresPumpAv	PressureMeasure	Average pump pressure.
ReasonTrip	String2000	Reason for trip.
RopAv	LengthPerTimeMeasure	Average rate of penetration through Interval.
RopMn	LengthPerTimeMeasure	Minimum rate of penetration through Interval.
RopMx	LengthPerTimeMeasure	Maximum rate of penetration through Interval.
RpmAv	AngularVelocityMeasure	Average turn rate (commonly in rpm) through Interval.
RpmAvDh	AngularVelocityMeasure	Average turn rate (commonly in rpm) downhole.
RpmMn	AngularVelocityMeasure	Minimum turn rate (commonly in rpm).
RpmMx	AngularVelocityMeasure	Maximum turn rate (commonly in rpm).
SlackOff	ForceMeasure	Slackoff = HkldRot - HkdDown.
TempMudDhMx	ThermodynamicTemperatureMeasure	Maximum mud temperature downhole during run.
TqDhAv	MomentOfForceMeasure	Average torque: downhole.
TqOffBotAv	MomentOfForceMeasure	Average torque: off bottom.
TqOnBotAv	MomentOfForceMeasure	Average Torque: on bottom.
TqOnBotMn	MomentOfForceMeasure	Minimum torque: on bottom.
TqOnBotMx	MomentOfForceMeasure	Maximum torque: on bottom.
Tubular	String64	A pointer to the tubular assembly.
uid	String64	Unique identifier for the parameters
VelNozzleAv	LengthPerTimeMeasure	Bit nozzle average velocity.
WobAv	ForceMeasure	Surface weight on bit - average through interval.
WobAvDh	ForceMeasure	Weight on bit - average downhole.
WobMn	ForceMeasure	Weight on bit - minimum.
WobMx	ForceMeasure	Weight on bit - maximum.
WtAboveJar	ForceMeasure	Weight of the string above the jars.
WtBelowJar	ForceMeasure	Weight of the string below the jars.
WtMud	MassPerVolumeMeasure	Drilling fluid density.

Table 12.2.3-2 Associations
Association	Notes
From: DrillingParams. To: MudClass Dependency
From: DrillingParams. To: MudSubClass Dependency
From: BhaRun.DrillingParams 0..*To: DrillingParams Association	Drilling parameters.
From: OpsReport.DrillingParams 0..*To: DrillingParams Association	Average bottom hole assembly parameters for report duration or actual instances of bottom hole assembly operations.