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Downhole Tool Capable Of Withstanding High Temperatures
Abstract: The present invention relates to a downhole wireline tool for performing an operation in a well at a depth of up to 15 km downhole the tool being powered by direct current at a predetermined voltage in a first end by a power supply unit which is configured to provide a specific steady state voltage selected from a plurality of predetermined voltages comprising an electrical motor being powered by alternating current a frequency converter arranged between the first end and the motor and a voltage peak reduction unit adapted to reduce the steady state voltage of the selected power supplied to the frequency converter from the power supply the voltage peak reduction unit comprising a capacitor wherein the capacitor is a high temperature capacitor having a dielectric comprising a material capable of resisting a temperature above 150°C. Furthermore the present invention relates to a downhole tool string and to a method of protecting a frequency converter from peaks of voltage in power supplied to the frequency converter in a downhole tool according to the present invention.
Notices, Deadlines & Correspondence
Patent Information
Applicants
WELLTEC A/S
Inventors
1. HALLUNDBÆK Jørgen
2. NØRGAARD Anders Just
Specification
SOFT COPY ATTACHED IN PDF
Documents
Application Documents
| # | Name | Date |
|---|---|---|
| 1 | 6847-CHENP-2015-Correspondence-Form 3-260416.pdf | 2016-07-12 |
| 1 | Power of Attorney [03-11-2015(online)].pdf | 2015-11-03 |
| 2 | 6847-CHENP-2015-Form 3-260416.pdf | 2016-07-12 |
| 2 | Form 5 [03-11-2015(online)].pdf | 2015-11-03 |
| 3 | Form 3 [03-11-2015(online)].pdf | 2015-11-03 |
| 3 | abstract 6847-CHENP-2015.jpg | 2016-03-18 |
| 4 | Form 1 [03-11-2015(online)].pdf | 2015-11-03 |
| 4 | ABSTRACT.pdf | 2016-03-18 |
| 5 | 6847-CHENP-2015.pdf | 2015-11-10 |
| 5 | Drawing [03-11-2015(online)].pdf | 2015-11-03 |
| 6 | Description(Complete) [03-11-2015(online)].pdf | 2015-11-03 |
| 7 | 6847-CHENP-2015.pdf | 2015-11-10 |
| 7 | Drawing [03-11-2015(online)].pdf | 2015-11-03 |
| 8 | ABSTRACT.pdf | 2016-03-18 |
| 8 | Form 1 [03-11-2015(online)].pdf | 2015-11-03 |
| 9 | abstract 6847-CHENP-2015.jpg | 2016-03-18 |
| 9 | Form 3 [03-11-2015(online)].pdf | 2015-11-03 |
| 10 | Form 5 [03-11-2015(online)].pdf | 2015-11-03 |
| 10 | 6847-CHENP-2015-Form 3-260416.pdf | 2016-07-12 |
| 11 | Power of Attorney [03-11-2015(online)].pdf | 2015-11-03 |
| 11 | 6847-CHENP-2015-Correspondence-Form 3-260416.pdf | 2016-07-12 |