Well Integrity Technical Section

I am currently exploring well integrity tools capable of operating in high-temperature environments-specifically those rated for temperatures exceeding 150°C. I would greatly appreciate any information or recommendations on available tools, including:

• Temperature and pressure limits

• Measurement capabilities (e.g., casing thickness, cement bond quality, annular pressure, etc.)

• Reliability or limitations in high-temperature settings

• Any recent field applications or case studies

• Vendors or service providers offering such tools

If you have any relevant experience, references, or documentation that could be shared, it would be extremely helpful.

Thank you in advance for your time.

Saeed,
There are many tools available on the market for temperatures up to 300C,
the reliability concerns are the longer they are at high temperature the
accuracy tends to drift, of course the hottest part is going to be the
reservoir and I am sure time at that point will be limited.

Look at the Xtreme tools from SLB, or HPHT MFC 40 from READ, Spartek have a
varying range of tools, also the nautilus suite from Baker Hughes

All of these companies above have case histories available for download.

--
Gordon Duncan
Thailand
+668 171 54736

Saeed,

I agree with Gordon that there are qualified tools out there for these temperatures...for at least a few years.  The problem is few tools are designed from the ground up for high temperatures and will not last 20 years MTTF.  I have found that you can't rely on all manufacturers to tell the truth here and some will over-state the equipment's capabilities.

If you really want to know who are the best candidates for your well you may have to conduct your own oven tests to perform accelerated aging and find which components are surviving longest. Just because they use milcert parts for some items does not mean the entire system is rated to high temperatures.  By conducting your own rounds of oven tests, under your test conditions, you can separate the good items from the average.  But this is expensive and takes time....over a year at least.  I have been through this process and it always has revealed surprises.

Let me know if any questions,

------------------------------
Dan Gibson
aka The Well Doctor
Completion & Well Integrity Advisor
Houston, Texas
------------------------------

Original Message:
Sent: 04-26-2025 12:12 AM
From: Gordon Duncan
Subject: Inquiry on High-Temperature Well Integrity Tools (>150°C)

Saeed,
There are many tools available on the market for temperatures up to 300C,
the reliability concerns are the longer they are at high temperature the
accuracy tends to drift, of course the hottest part is going to be the
reservoir and I am sure time at that point will be limited.

Look at the Xtreme tools from SLB, or HPHT MFC 40 from READ, Spartek have a
varying range of tools, also the nautilus suite from Baker Hughes

All of these companies above have case histories available for download.

--
Gordon Duncan
Thailand
+668 171 54736

Good morning;

I have had very good experiences with the Downhole Sonic Solutions HRS line of Radial CBL tools running consistently at ~180-220°C. Good rugged tools with logging speeds of ~30m/min (100ft/min). I am also working with a different manufacturer in designing a ~200°C EMT casing thickness tool that will run 6hr without flasking, significantly longer with flasks. Unflasked oven tests at 200°C have been very promising.

You are welcome to reach out if you would like some contact information.

Best regards;

Steve Wierenga

That Wireline Guy

steve@thatwirelineguy.com

+1-403-861-9882

Original Message:
Sent: 04-28-2025 08:27 AM
From: Dan Gibson
Subject: Inquiry on High-Temperature Well Integrity Tools (>150°C)

Saeed,

I agree with Gordon that there are qualified tools out there for these temperatures...for at least a few years.  The problem is few tools are designed from the ground up for high temperatures and will not last 20 years MTTF.  I have found that you can't rely on all manufacturers to tell the truth here and some will over-state the equipment's capabilities.

If you really want to know who are the best candidates for your well you may have to conduct your own oven tests to perform accelerated aging and find which components are surviving longest. Just because they use milcert parts for some items does not mean the entire system is rated to high temperatures.  By conducting your own rounds of oven tests, under your test conditions, you can separate the good items from the average.  But this is expensive and takes time....over a year at least.  I have been through this process and it always has revealed surprises.

Let me know if any questions,

------------------------------
Dan Gibson
aka The Well Doctor
Completion & Well Integrity Advisor
Houston, Texas
------------------------------


Original Message:
Sent: 04-26-2025 12:12 AM
From: Gordon Duncan
Subject: Inquiry on High-Temperature Well Integrity Tools (>150°C)

Saeed,
There are many tools available on the market for temperatures up to 300C,
the reliability concerns are the longer they are at high temperature the
accuracy tends to drift, of course the hottest part is going to be the
reservoir and I am sure time at that point will be limited.

Look at the Xtreme tools from SLB, or HPHT MFC 40 from READ, Spartek have a
varying range of tools, also the nautilus suite from Baker Hughes

All of these companies above have case histories available for download.

--
Gordon Duncan
Thailand
+668 171 54736

Hello Saeed,

Fibre optic surveys are another option using DTS, DAS and DSS to understand flow behind pipe. Because the electronics are on surface only, some fibres are suitable for high temperatures. 

Well-Sense have completed 200C surveys, you could contact info@well-sense.co.uk for more information. 

Rob

Saeed

We at Scientific Drilling have offered technologies for high temperature environments (>300degC) for decades. Our calipers may be of interest for some of your requirements. We have two systems: 1) 24-finger tool that can operate at up to 220degC and measures diameters ranging from 1.85" to 7.5". 2) 40-finger tool operating at up to 343degC, measuring diameters from 5.5" to 14.5". 

https://scientificdrilling.com/assets/uploads/2017/06/Vulcan-MFT-24-PSS.pdf

https://scientificdrilling.com/assets/uploads/2023/12/Vulcan-MFT-40_Product-Spec-Sheet-English-SDI-G006_10_22.pdf

reza.khastoo@scientificdrilling.com