Failure Modes Inspection process Component Tracking Samit Gokhale

NPT IADD Monthly Meeting Connection & Mud Motor Issues

Long, long laterals mean… Static Torque …lots of torque. Dynamic Torque

That’s tough on our connections. We try to get better results with some tricks:

Torque Compression Tension Because the stress gets shared between two places, more torque can

Double Shouldered connections. Increased repair costs Compatibility issues across manufacturers Mostly sized based on

If you’re using a tool that’s fieldproven (like mud motors), it’s unlikely that you’ve

While it’s possible that there’s a material problem, those are rare and tend to

6 -3/4" mud motor Performance Motors aren’t all the same, so you should match

6 -3/4" mud motor Environment The motor also has to match the hole. Temperature

Which means you have to communicate with your end user.

Everything in our industry is used, so inspection is an important way to ensure

Tools that have been “inspected” all looks the same, so I have to control

- Rig-end connections - Bodies, subs, stabilizers - Stator elastomers (borescope)

The shop manual can (and should) address more specific items. SOP

6 -3/4" mud motor An example… Correct number of balls Lubricated well Proper stack

In many cases that only happens when an auditor forces them to do everything

Performance ranges? Optimum Maximum Me! Minimum

Good procedures get you consistency. What you want is high quality. Only by feeding

This sounds like it’s a lot of work. Because it is. Review & Improvement

Samit Gokhale T H Hill Associates, (281) 671 -5767 | office (832) 969 -3454

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Failure Modes, Inspection process, Component Tracking Samit Gokhale 1

NPT IADD Monthly Meeting Connection & Mud Motor Issues

Long, long laterals mean… Static Torque …lots of torque. Dynamic Torque

That’s tough on our connections. We try to get better results with some tricks: Increase MUT beyond API Makeup Torques Increase torque with higher FF thread dope

Torque Compression Tension Because the stress gets shared between two places, more torque can be applied. Compression Once the second shoulder engages… Tension 5

Double Shouldered connections. Increased repair costs Compatibility issues across manufacturers Mostly sized based on DP configurations Need for industry standardized double shouldered connections

Mud Motor failures because of…

Tool Design

Component Manufacturing

Job Order

Component Inspection

Assembly & Testing

Field Use

If you’re using a tool that’s fieldproven (like mud motors), it’s unlikely that you’ve stumbled upon a fundamental design flaw. Tool Design Component Manufacturing Job Order Component Inspection Assembly & Testing Field Use

While it’s possible that there’s a material problem, those are rare and tend to be obvious. Tool Design Component Manufacturing Job Order Component Inspection Assembly & Testing Field Use

Job Order

6 -3/4" mud motor Performance Motors aren’t all the same, so you should match the tool to the operation.

6 -3/4" mud motor Environment The motor also has to match the hole. Temperature causes the stator rubber to swell, making the fit tighter. Oil-based fluids also cause swelling.

Which means you have to communicate with your end user.

Job Order

Component Inspection

Everything in our industry is used, so inspection is an important way to ensure all our components are serviceable.

Tools that have been “inspected” all looks the same, so I have to control the inspection with good procedures.

- Rig-end connections - Bodies, subs, stabilizers - Stator elastomers (borescope)

The shop manual can (and should) address more specific items. SOP

Component Inspection

Assembly & Testing

6 -3/4" mud motor An example… Correct number of balls Lubricated well Proper stack height

In many cases that only happens when an auditor forces them to do everything exactly as listed in the procedure. SOP

Assembly & Testing

Field Use

Performance ranges? Optimum Maximum Me! Minimum

Review & Improvement

Good procedures get you consistency. What you want is high quality. Only by feeding failure information back into the system can you encourage continual improvement. Tool Design Component Manufacturing Job Order Component Inspection Assembly & Testing Review & Improvement Field Use

This sounds like it’s a lot of work. Because it is. Review & Improvement Tool Design Component Manufacturing Job Order Component Inspection Assembly & Testing Field Use

Samit Gokhale T H Hill Associates, (281) 671 -5767 | office (832) 969 -3454 | cell samit. gokhale@thhill. com Review & Improvement Tool Design Component Manufacturing Job Order Component Inspection Assembly & Testing Field Use