1. Recommended MUT

© 2012 NOV All Rights Reserved

Performance Sheet Guide

October 22, 2012

Shankar Bhukya Technical Marketing Engineer

Europe & West Africa


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• Performance sheet is a NOV Grant Prideco®

Technical Document consisting of 7 Pages.

• Performance sheets can be created for Drill Pipe, Heavy Weight Drill Pipe, Drill Collar, Landing String, Integral Pup Joint, or just for Connections only.

• Performance sheet can be made either in Imperial or Metric.

Performance Sheet


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• A Performance Sheet contains all the key parameters such as Configuration of the pipe, Performance of the Assembly, Connection Performance, Elevator Shoulder Information, Pipe Body Slip Crushing Capacity, Pipe Body Performance, Operational Limits of the Drill Pipe Assembly, Make-up Torque Range, Connection Ware Table, Combined Loading Table (Torque-Tension), Torque-Tension Graph, Pipe Operational Limit Graphs, Connection Wear Graphs.

Performance Sheet


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Performance Sheets Ask or consult the NOV Grant Prideco® website for

performance sheets to select the best suited pipe configuration.

Presenter

Presentation Notes

the summary page �- the torque tension section�- the wear curve section This is an example of a performance sheet set that we can provide you with so that you can compare various product configuration and optimize your drill string. The tools is also available on our website for you to use.


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• Summary Page – Pipe Configuration Section

• Pipe Configuration Section has all the necessary information in a ‘nutshell’ such as Pipe Size, weight, Length, Connection Type, Tool Joint dimensions, Tong Lengths etc.

Performance Sheet Evaluation


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• The Pipe Performance Section shows the information such as Make-up Torque values, Tensiles, Loads, Capacities, Displacements etc.

Pipe Performance Section


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• WHY Recommended MUT?

– The IADC drilling manual recommends that the

operation/drilling torque be 80% or less of the Makeup Torque (MUT). Reducing MUT reduces your available torque for drilling. Maximizing MUT also reduces the possibility of uncontrolled downhole makeup from stick-slip or other dynamic conditions. For this reason, our recommended MUT is the maximum MUT

Connection Performance Section


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• The Pipe Performance Section of a performance

sheet shows the operational envelope of the drill string. No safety factor is applied.

• This operational envelope is the boundary of torque and tension that the drill string can withstand under drilling and completions operations. The configuration in the next few slides show the different ways the operational envelope can be limited by the pipe body or the connection.



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1. Recommended MUT: The recommended make-up torque is how much torque you should apply to the connection when making it together.

2. Tension Only: This is the tensile limit of the assembly in pure tension with no operational torque is applied. This would be while pulling out of hole or when landing something, etc.

3. Combined Loading: This is the tensile limit of the assembly with maximum operational torque applied. This would be while drilling or backreaming, etc.



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1. Recommended MUT 2. Tension Only 3. Combined Loading



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1. Recommended MUT 2. Tension Only 3. Combined Loading



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• Connection Performance Section shows the Tensiles and Torsional Values. It also shows new and API Premium class (80%) Tool Joint dimensions.

Connection Performance Section


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• Elevator Shoulder Information Section

• Pipe Body Slip Crushing Capacity Section

Performance Sheet Evaluation


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• Pipe Body Performance Section shows the Pipe characteristics such as Tensiles, Torsional Strengths, Burst, Collapse Values, Cross Sectional Areas etc. for Nominal (New) Pipe, at various Inspection Classes (as required) and also at API Premium Class.

Pipe Body Performance Section


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• Operational Limits of Drill Pipe Section shows the combined loading figures of the pipe at Recommended Make-up Torque & Minimum Make-up torque.

Operational Limits of Drill Pipe Section


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• This section shows the Maximum tension values for

the various Torque figures between Minimum and Recommended Make-up Torques.

Connection Make-up Torque Range Section


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• This section shows the combined loading values i.e. Torque-Tension values just for the Pipe Body.

Pipe Body Combined Loading Table (Torque-Tension)


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Graphs / Curves Torque‐Tension Graph


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(Connection at Recommended MUT)


20 /23 Graphs / Curves Drill Pipe Operational Limits

(Connection at Minimum MUT)


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Graphs / Curves Connection Wear


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Graphs / Curves Connection Wear

• This last curve is the wear curves. It shows the connection torsional performances on the Y axis versus the tool joint OD that starts on the left at the new product dimension and reduces going to the right when the tool joint wears.

• The RED line is the connection torsional strength, point at which the connection fails in pure Torsion.

• The horizontal BLUE line is 80% of the pipe body Torsional Strength, which is the value we compare our connection against for wear allowance. When the RED line meets the BLUE one, you find the tool joint OD at which the connection will be cause for downgrading of the pipe from premium to class 2.

• The GREEN & YELLOW lines show the Maximum & Minimum MUT and they are proportional to the torsional strength. Connection has to be made up to a Torque between these two lines and the MUT depends on the actual tool joint OD.


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• This section shows the Torsional Strengths and the

required Minimum and Maximum Make-up Torque when the Tool Joint is new or worn after few runs.

Connection Wear Table Section


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1. Recommended MUT

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Transcript of 1. Recommended MUT