High Temperature Metal Thermos Flask
It is a high‑vacuum metal Dewar flask for downhole logging tools.Featuring multi‑layer vacuum insulation and optional phase‑change heat‑absorbing materials, this passive thermal‑management enclosure houses sensitive electronics and batteries within logging instruments.
Deep hydrocarbon wells have extreme bottom‑hole temperatures beyond the safe limits of logging electronics and lithium batteries. Unprotected components would overheat, fail and cause data loss. The Dewar flask suppresses heat ingress, maintains internal components within acceptable temperature limits over operational periods, avoids electronic burnout and ensures reliable data acquisition in high‑temperature downhole conditions.
Integrated into wireline, memory‑based logging and downhole monitoring tools, it is used in HP‑HT deep wells, steam‑injection heavy‑oil wells, SAGD wells and geothermal wells. It enables formation evaluation, production logging, PT monitoring, pulsed‑neutron saturation logging and side‑wall coring in harsh downhole conditions.
Key Features & Advantages
Effective thermal control：
Efficient heat‑absorbing materials absorb both infiltrated downhole heat and instrument self‑generated heat. Ultra‑high vacuum eliminates gas conduction/convection; special multi‑layer wrapping minimizes radiative heat transfer for superior heat‑barrier performance.
Flexible material option：
Standard 316L austenitic stainless‑steel body; alternative materials available per customer requirements.
Custom pressure‑temperature composite design：
Optimized structure to meet demands for pressure resistance, corrosion resistance and high‑temperature strength.
Improved downhole reliability：
Passive thermal protection keeps electronics and batteries within safe temperature range, avoiding component burnout and data loss to boost operation success rate.
Typical applications
· Tool Compatibility:
Seamlessly integrates with wireline logging, memory-based logging and downhole monitoring tools.
· Target Well Types:
HP-HT deep wells, steam-injection heavy-oil wells, SAGD wells and geothermal wells.
· Supported Operations:
Performs formation evaluation, production logging, PT monitoring, pulsed-neutron saturation logging and side-wall coring under harsh downhole conditions.
Specifications:
|
Model |
OD (mm) |
ID (mm) |
Temp (℃) |
Work time (h) |
Temp rise inside the bottle |
|
SG35/25 |
35 |
25 |
200 |
4 |
≤60 |
|
SG35/28 |
35 |
28 |
260 |
3 |
≤130 |
|
SG37/28 |
37 |
28 |
175 |
4 |
≤60 |
|
SG40/31 |
40 |
31 |
175 |
4 |
≤60 |
|
SG42/36 |
42 |
36 |
200 |
4 |
≤60 |
|
SG46/36 |
46 |
36 |
200 |
5 |
≤60 |
|
SG51/36 |
51 |
36 |
260 |
4 |
≤80 |
|
SG68/55 |
68 |
55 |
200 |
4 |
≤60 |
|
SG68/61 |
68 |
61 |
200 |
4 |
≤60 |
|
SG73/65 |
73 |
65 |
200 |
4 |
≤60 |
|
SG73/65 Long lasting thermos housing |
73 |
65 |
200 |
10 |
≤40 |
Customization Option
Material: Standard 316L austenitic stainless‑steel body; alternative materials available upon request.
Pressure‑temperature design: Custom pressure‑temperature composite design with optimized structural dimensions to meet requirements for pressure resistance, corrosion resistance and high‑temperature strength.
Thermal solution: Configurable heat‑absorbing material formulation according to downhole thermal load and operating duration.
Quality & Testing
Raw material inspection: Strict incoming inspection for metal substrates and functional materials to guarantee base‑material performance.
Vacuum performance test: High‑vacuum leak‑detection to verify sealing and insulation performance of the Dewar assembly.
Pressure‑temperature validation: Composite pressure‑high‑temperature testing simulates actual downhole working conditions, verifying pressure resistance, structural integrity and thermal‑insulation capability.
Full‑product inspection: Dimensional check and appearance inspection for each unit before delivery to ensure compliance with technical specifications.
Quality assurance: Every delivered unit is supplied with an independent inspection acceptance report.
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