Investigation into phantom downlinks and development of a prevention algorithm in rotary steerable system
This paper investigated the failure cause of phantom downlinks of a flow rate detection mechanism in a rotary steerable system and developed a prevention algorithm. Downlinking is the process of controlling a drilling tool from the surface by sending commands to downhole. Directional drillers send d...
| Main Author: | |
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2021-09-01
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| Series: | Petroleum |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405656120300894 |
| _version_ | 1819103475791822848 |
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| author | Fei Li |
| author_facet | Fei Li |
| author_sort | Fei Li |
| collection | DOAJ |
| description | This paper investigated the failure cause of phantom downlinks of a flow rate detection mechanism in a rotary steerable system and developed a prevention algorithm. Downlinking is the process of controlling a drilling tool from the surface by sending commands to downhole. Directional drillers send downlinks to the rotary steerable system to adjust steering parameters to achieve the desired well plan. The downlink demodulation of downhole tools is achieved through the measurement of flow rate and correlation of waveform with predefined command models; downlink acceptance is based on the correlation rate. One case study revealed that phantom downlinks were due to the variation of turbine rotation speed, which was the result of alternator load changes. A prevention algorithm of conducting a signal energy check was proposed and implemented. The algorithm can successfully prevent phantom downlinks that are usually of low-level energy and only accept authentic downlinks. The work improved the downlinking reliability of the rotary steerable system. This methodology can be further applied to other downlink demodulation mechanisms using collar speed or pressure measurement. |
| first_indexed | 2024-12-22T01:51:03Z |
| format | Article |
| id | doaj.art-6b23616ea58a4c2a84609ad27876311b |
| institution | Directory Open Access Journal |
| issn | 2405-6561 |
| language | English |
| last_indexed | 2024-12-22T01:51:03Z |
| publishDate | 2021-09-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Petroleum |
| spelling | doaj.art-6b23616ea58a4c2a84609ad27876311b2022-12-21T18:42:55ZengKeAi Communications Co., Ltd.Petroleum2405-65612021-09-0173349355Investigation into phantom downlinks and development of a prevention algorithm in rotary steerable systemFei Li0Shaanxi Key Laboratory of Measurement and Control Technology for Oil and Gas Wells, Xi’an Shiyou University, Xi’an, 710065, China; School of Electronic Engineering, Xi’an Shiyou University, Xi’an, 710065, China; Shaanxi Key Laboratory of Measurement and Control Technology for Oil and Gas Wells, Xi’an Shiyou University, Xi’an, 710065, China.This paper investigated the failure cause of phantom downlinks of a flow rate detection mechanism in a rotary steerable system and developed a prevention algorithm. Downlinking is the process of controlling a drilling tool from the surface by sending commands to downhole. Directional drillers send downlinks to the rotary steerable system to adjust steering parameters to achieve the desired well plan. The downlink demodulation of downhole tools is achieved through the measurement of flow rate and correlation of waveform with predefined command models; downlink acceptance is based on the correlation rate. One case study revealed that phantom downlinks were due to the variation of turbine rotation speed, which was the result of alternator load changes. A prevention algorithm of conducting a signal energy check was proposed and implemented. The algorithm can successfully prevent phantom downlinks that are usually of low-level energy and only accept authentic downlinks. The work improved the downlinking reliability of the rotary steerable system. This methodology can be further applied to other downlink demodulation mechanisms using collar speed or pressure measurement.http://www.sciencedirect.com/science/article/pii/S2405656120300894DownlinkDemodulationDrillingRotary steerable systemEnergy check |
| spellingShingle | Fei Li Investigation into phantom downlinks and development of a prevention algorithm in rotary steerable system Petroleum Downlink Demodulation Drilling Rotary steerable system Energy check |
| title | Investigation into phantom downlinks and development of a prevention algorithm in rotary steerable system |
| title_full | Investigation into phantom downlinks and development of a prevention algorithm in rotary steerable system |
| title_fullStr | Investigation into phantom downlinks and development of a prevention algorithm in rotary steerable system |
| title_full_unstemmed | Investigation into phantom downlinks and development of a prevention algorithm in rotary steerable system |
| title_short | Investigation into phantom downlinks and development of a prevention algorithm in rotary steerable system |
| title_sort | investigation into phantom downlinks and development of a prevention algorithm in rotary steerable system |
| topic | Downlink Demodulation Drilling Rotary steerable system Energy check |
| url | http://www.sciencedirect.com/science/article/pii/S2405656120300894 |
| work_keys_str_mv | AT feili investigationintophantomdownlinksanddevelopmentofapreventionalgorithminrotarysteerablesystem |