Cesium-137 (Cs-137) for Oil Well Logging..

We also offer Industrial Cs-137 Gamma Sources

QSA Global, Inc. has manufactured thousands of sealed Cesium-137 (Cs-137) density sources for notable oilfield service companies worldwide for oil well logging (OWL) including Schlumberger®, Halliburton®, Weatherford®, and Baker Hughes® as well as numerous independent tool manufacturers for over 60 years.

Achieve fast, accurate density measurements in Wireline, Measurement While Drilling (MWD), and Logging While Drilling (LWD) applications with superior design features such as:

  • A rattle-free design to ensure a fixed center of activity, resulting in consistent, precise measurements.
  • Highly insoluble fused glass provides maximum environmental safety.
  • The smallest focal on the market for more accurate measurements.
Radiation Type: High-Energy Gamma Source
Measurement: Density
Standard Activity Up to 2.5 Ci (92.5 GBq) 
Gamma Ray Energy: 0.662 MeV
Half-Life 30.17 years 
Gamma Dose Rate

320 mrem/hr/Ci at 1 m
86.4 µSv/hr/GBq at 1 m
Recommended Working Life: 15 years

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Cs-137 oil well logging sources

Experts in Custom Cs-137 Source Design

 

QSA Global, Inc.'s technical experts excel at designing custom sealed Cs-137 sources to integrate with your bull plugs and pressure vessels for oil well logging applications. We provide recommendations on superior materials better suited for high temperature, high pressure, or corrosive environments. We also offer technical guidance on capsule dimensions, interface, assembly, and specific handling features that work best for your requirements. The following are just a few examples of our most commonly requested Cs-137 sealed sources.

Capsule Code: X2170

US Model #: CDC.CY3
Activity 1.78 Ci (+0%/-15%)
Tolerance (Output) 1.42 x 103 nGy/s (+0%/-15%)
Double Encapsulated MP35N
Special Form Certificate USA/0650/S-96
ISO/ANSI Rating C6X646 (X=60,000 psi)

Capsule Code: X2063

US Model #: CDC.CY6
Activity 1.78 Ci (+0%/-15%)
Tolerance (Output) 1.42 x 103 nGy/s (+0%/-15%)
Double Encapsulated ARMCO 17-4 PH Stainless Steel
Special Form Certificate USA/0650/S-96
ISO/ANSI Rating C6X646 (X=60,000 psi)

Capsule Code: X2112/3

US Model #: CDC.CY13
Activity 2.00 Ci (±20%)
Tolerance (Output) 1.60 x 103 nGy/s (±20%)
Double Encapsulated ARMCO 17-4 PH Stainless Steel
Special Form Certificate USA/0650/S-96
ISO/ANSI Rating C6X646 (X=60,000 psi)

Capsule Code: X2178

US Model #: CDC.CY16
Activity 2.00 Ci (+10%/-10%)
Tolerance (Output) 1.60 x 103 nGy/s (±10%)
Double Encapsulated MP35N
Special Form Certificate USA/0650/S-96
ISO/ANSI Rating C66646

Capsule Code: X2080

US Model #: CDC.CY11
Activity 1.5 Ci (+10%/-10%)
Tolerance (Output) 1.20 x 103 nGy/s (±10%)
Double Encapsulated ARMCO 17-4 PH Stainless Steel
Special Form Certificate USA/0612/S-96
ISO/ANSI Rating C66646

Capsule Code: X2074

US Model #: CDC.CY4
Activity 2.00 Ci (+20%/-20%)
Tolerance (Output) 1.60 x 103 nGy/s (±20%)
Double Encapsulated ARMCO 17-4 PH Stainless Steel
Special Form Certificate USA/0612/S-96
ISO/ANSI Rating C66646

Cs-137 Sealed Source Integrity Testing

 

QSA Global, Inc.'s sealed Cs-137 sources are manufactured with high-performance materials, such as MP35N and 17-4 PH stainless steel for outstanding durability, corrosion resistance, and extremely high tensile strength. 17-4 PH stainless steel provides magnetic properties to facilitate source retrieval. All of our Cs-137 sources are tested according to ISO 2919/ANSI N43.6 standards. We can perform high-pressure testing up to 60,000 PSI (414 MPa), which is well beyond the class 6 pressure requirement of 24,656 PSI (170 MPa). We can also perform temperature testing to the maximum class 6 requirement of 800° C for 1 hour.The following are just a few of the tests we perform:

X9090-ANSI-Vertical-Puncture-Test

ISO 2919 Class 6 Puncture Test: 2.2 lbs (1 kg) from 3.3 ft (1 m) or equivalent imparted energy

Low-temperature-test-with-liquid-nitrogen

ISO 2919 low-temperature test with liquid nitrogen (-196°C)

after-nitrogen

Post low-temperature test with liquid nitrogen

800-C-Thermal-Test

ISO 2919 Class 6 High Temperature test to 800°C for 1 hour

water-quench-test

ISO 2919 Class 6 Temperature Test: Thermal shock from 800°C to 20°C (in water)

after-testing

Post ISO 2919 Class 6 thermal shock test

Sealed Cs-137 Source FAQs

 

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Our multi-disciplined technical experts are here to help you find and design the right Cs-137 sealed radioactive sources to achieve fast, precise measurements in your Wireline and Measurement While Drilling (MWD or LWD) applications.

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Disposition Services.

Radioactive Cs-137 sources that are no longer required must be transferred to a licensed recipient for final disposition. QSA Global, Inc. can provide all the services needed for the disposition of your sealed Cs-137 sources.

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Formerly known as Amersham Corporation and AEA Technology, QSA Global, Inc. is the original equipment manufacturer of Am-241, Am-241/Be, Cf-252, Cs-137, and Co-60 industrial sealed radioactive sources.