Marpaung
David Marpaung, Sydney AU
Patent application number | Description | Published |
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20160142148 | A DEVICE AND A METHOD FOR GENERATING AN ELECTRICAL SIGNAL WITH A SUPPRESSED FREQUENCY BAND - Abstract Disclosed herein is a notch filter and a method for generating an electrical signal with a suppressed frequency band. The filter generates an optical signal by modulating a modulation optical wave with an electrical signal to generate first and second sidebands. The first sideband or the second sideband has less power than the other. The filter then modifies the optical signal by equalising the power of light within the first side band at a selected frequency band and light within the second side band at the selected frequency band. The filter then produces an antiphase relationship between the light within the first side band at the selected frequency band and the light within the second side band at the selected frequency band. The filter then detects the modified optical signal to generate a copy of the electrical signal with suppressed frequency components within the selected frequency band. | 05-19-2016 |
Sihar Marpaung, Sagamihara-Shi JP
Patent application number | Description | Published |
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20110042071 | CLEAN FLUID SAMPLE FOR DOWNHOLE MEASUREMENTS - A system and method for obtaining a clean fluid sample for analysis in a downhole tool are provided. In one example, the method includes directing fluid from a main flowline of the downhole tool to a secondary flowline of the downhole tool. While the fluid is being directed into the secondary flowline, sensor responses corresponding to the fluid in the secondary flowline are monitored to determine when the sensor responses stabilize. The secondary flowline is isolated from the main flowline after the sensor responses have stabilized. A quality control procedure is performed on the fluid in the secondary flowline to determine whether the captured fluid is the same as the fluid in the main flowline. Additional fluid from the main flowline is allowed into the secondary flowline if the captured fluid is not the same. | 02-24-2011 |
Sihar Marpaung, Kanagawa-Ken JP
Patent application number | Description | Published |
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20090321072 | METHODS AND APPARATUS OF DOWNHOLE FLUIDS ANALYSIS - A fluid sampling and analysis module for a downhole fluid characterization apparatus configured for operation downhole, within a borehole. The fluid sampling and analysis module comprises a primary flowline for fluids withdrawn from a formation to flow through the fluid sampling and analysis module, a bypass flowline in fluid communication with the primary flowline and a single valve, interconnecting the primary flowline and the bypass flowline, operable to a first position for formation fluids to flow in the primary flowline and to a second position for formation fluids to flow, via the bypass flowline, in the primary flowline. | 12-31-2009 |
Sihar Marpaung, Kangawa-Ken JP
Patent application number | Description | Published |
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20130110401 | CALIBRATION AND CONSISTENCY CHECK OF VARIABLEW VOLUME SYSTEMS | 05-02-2013 |
Sihar Marpaung, Issy Les Moulineaux FR
Patent application number | Description | Published |
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20150267528 | System and Method for Caliper Calibration - Embodiments of the present disclosure are directed toward a system and method to calibrate calipers of a downhole tool. Specifically, a calibration tool includes a substantially cylindrical calibration ring. The calibration tool also includes a finger coupled to the calibration ring. The finger is configured to engage with the downhole tool such that the calibration ring is mounted to the downhole tool and is coaxial with a tool axis of the downhole tool. | 09-24-2015 |
20150361744 | Downhole Pressure Compensator - The techniques herein relate to a pressure compensation system. The system includes a downhole tool and one or more pressure compensators positionable in the downhole tool. Each pressure compensator includes a first compensating fluid section having a first compensating fluid, at least one second compensating fluid section having a second compensating fluid, and a convoluted membrane between the first and second fluids in the first and second compensating fluid sections, respectively. The first or second compensating fluid sections, or both, may include a porous disk positioned at a hole in the fluid section. The pressure compensator may also include a switch configured to indicate a fluid condition in the pressure compensator and a relief valve configured to release fluid from the pressure compensator. | 12-17-2015 |
20150361781 | Fastening Technique in a Downhole Tool - Systems and methods are provided for implementing sliders | 12-17-2015 |