1. Purpose and significance Derrick is an important part of oil drilling and workover operations. Modern drilling and workover operations all use derricks. The derrick is responsible for hoisting and lowering the drill string, placing cranes, suspended traveling blocks, hooks and other equipment, as well as storing the drill string and tubing. Its own safety directly affects the normal use of the entire drilling rig and workover rig.
At present, there are more than 1,000 rigs in service in China, and the number of workover derricks will be even greater. With the rapid growth of China's demand for petroleum energy, more and more oil fields need to be developed, especially in recent years, China has increased its investment in the development of western oil fields, and the number of drilling and workover derricks will be greatly increased . Among them, active drilling derricks that have been used for more than 10 years have accounted for two-thirds of the total derricks, of which more than 15 years of active derricks exceed one-third of the total (a certain percentage of the derricks have been used for more than 20 years. Derricks that are more than 30 years old are also used in some oil fields). Because these derricks are used in the field all year round, and move and move frequently, their structures gradually produce defects and failures such as corrosion, deformation, fatigue, cracks and other local or overall losses, making it difficult to meet the original design requirements and become drilling And the hidden dangers of major accidents in workover work safety production. Especially in recent years, China has increased its attention to safety in various industries. Therefore, it is imperative to carry out safety inspection and evaluation of the load capacity of the derrick.
2. Research status and progress Petroleum derricks are high-rise truss structures used in special industries. According to the literature, due to the limitations of testing methods and testing methods, for many years, various research institutions and experts have focused on the calculation and analysis of the derrick theoretical force calculation and analysis. Because the established force calculation model is based on the derrick drawings, this research calculation result is mainly applicable to the structural force analysis and optimization analysis of the new derrick. Therefore, it is not suitable for long-term use, especially the stress analysis of the service derricks with certain defects. With the continuous improvement of detection methods and means and the continuous emphasis on safety production, domestic and foreign research institutions and experts have carried out research on the safety detection and evaluation of the service capacity of service derricks, and have achieved large research results. In order to conduct a more scientific, accurate, and safer safety inspection and evaluation of the derrick load capacity, special technical inspection agencies have been established at home and abroad, and strict operating specifications and calculation rules have been formulated.
Modsec, headquartered in the Netherlands, is a world-famous petroleum equipment testing company. It has branches in Singapore, Malaysia, Australia, Canada, the United States, Brazil and other countries. Its business includes petroleum equipment testing and evaluation, technology Services etc. Oil drilling companies from all over the world have hired the company to conduct safety testing and evaluation of oil rigs and other petroleum equipment. Companies in China that conduct drilling services overseas also employ them to conduct safety testing and evaluation of relevant petroleum equipment.
In China, the detection of oil derricks starts from the derrick manufacturers and related research units. The earliest and deeper research units that carried out safety inspection and evaluation research on the bearing capacity of derricks in China are China University of Petroleum and other petroleum colleges. Through the establishment and cooperation with the former Ministry of Petroleum, China University of Petroleum has carried out many years of research and experiments on the bearing capacity of derricks in service. Participated in the formulation of relevant standards of China's oil derrick bearing capacity testing and evaluation methods. Nearly one hundred oil derricks in production in the United States, France, Romania and China have been tested on-site in the oil fields of China's CNOOC, Sinopec, and PetroChina, and they have been professionally evaluated scientifically, safely, and effectively. The hidden danger of the accident has played a role in escorting the safe production of the oil field. There are A-type, K-type and tower-type derrick experimental models built in the laboratory. A large number of derrick stress experimental studies have been carried out in scientific research, and certain research results have been achieved. Over the years of teaching and scientific research and on-site testing work, we have accumulated the theoretical calculation and on-site testing experience of petroleum derrick, pumping unit and other petroleum machinery testing, and developed and perfected the software of petroleum drilling derrick carrying capacity testing and evaluation system. A complete set of safety testing and evaluation technology and calculation software system for the oil derrick carrying capacity in line with the national standard and suitable for on-site operation has been formed.
3. Cooperation Contents Through years of research and practice, our company has formed a set of more professional safety testing and evaluation technology and calculation software that meets many national standards and is suitable for oil field derrick carrying capacity safety. We can carry out all-round technical cooperation with relevant departments of the oil field through technical services, transfers, etc., establish a derrick safety testing and evaluation laboratory for them, and train a group of test and evaluation experts who understand the technology and the actual operating experience for the oil field To form a test team serving the oil field, create greater economic benefits for the enterprise, and also play a role in ensuring the safe production of the oil field. The technical content mainly includes detection technology, multi-parameter evaluation technology, etc.
4. Analysis of social and economic benefits The derrick is an indispensable component for oil drilling in the world. Its importance and safety are self-evident. If used improperly, it will cause great economic loss and personal injury or death to the country. Especially in recent years, China has attached great importance to safety in production, and safety awareness has increased to a new height.
According to relevant standards, the oil derrick is a strong inspection project, which requires that a test and evaluation must be carried out every 2 to 3 years according to the use of the derrick. According to current charging standards for derrick testing, the cost of testing a derrick is generally about 30,000 to 50,000 yuan, and the test time is 1 to 2 days. If one-time purchase of equipment and personnel costs are not considered, each derrick only costs hundreds of dollars. If we calculate 50 to 60 derricks based on the test and evaluation in a year, we will realize a total revenue of nearly two million yuan each year. China currently has more than 1,000 drilling derricks, and the number of workover derricks is even greater. Therefore, the social and economic benefits of carrying out the inspection and evaluation of the carrying capacity of oil derricks will be huge.
Fifth, the selection and configuration of related supporting instruments The derrick inspection and evaluation involves many items, the measurement parameters are cumbersome and complicated, the actual wiring is difficult, and the instrument accuracy requirements are high. Therefore, the selection of related instruments must be reasonably configured .
System options performance technical indicators and configuration instructions
1 wireless strain data collector (TST5920)
1. Adopt standard portable imported chassis, fully shielded chassis structure design, effectively improve the anti-interference ability on site.
2. Each channel's independent 16-bit Σ- △ A / D converter and each channel's independent high-performance floating-point DSP constitute a high-performance anti-aliasing filter with real-time digital filtering and analog filtering.
3. Adopt DDS high-precision frequency synthesis technology to ensure the parallel synchronous acquisition of all channels.
4. Adopts DMA data transmission technology to ensure real-time data transmission, real-time display, real-time analysis and real-time storage.
5. The system is equipped with a variety of pre-signal conditioners (ICP, strain, charge, etc.) to achieve simultaneous measurement of multiple signals.
7. Multi-channel parallel synchronous acquisition, the sampling frequency of each channel is up to 5K.
8. The imported Remo connector is used to better ensure the reliable transmission of small signals.
9. The use of Q-FAN intelligent temperature control system minimizes the influence of temperature on the measurement results.
10. Provide interface program of LABVIEW, VC, VB, CVI and other development platforms to facilitate users' secondary development.
11. Provide multi-channel speed measurement module to facilitate users to monitor the running state of rotating machinery and fault diagnosis.
12. Function-rich control analysis software and modal analysis software, users can easily operate and process the collected data.
13. Using real-time, efficient and high-speed MIMO wireless transmission technology, real-time wireless transmission speed up to 300Mbps.
14. Synchronization method: GPS
15. Comply with the usage conditions of GB6587.1-86-11.
Detailed technical indicators:
1. Instrument interface: 10M / 100M adaptive network port, wireless
2. Continuous sampling frequency: all channels are collected simultaneously, the highest sampling frequency of each channel is 5K
3. Customized sampling frequency: Users can customize any sampling frequency under the condition of meeting the highest sampling frequency.
4. Full scale value: ± 20mV, ± 50mV, ± 100mV, ± 200mV, ± 500mV, ± 1V, ± 2V, ± 5V, ± 10V, ± 20V;
5. Linearity: 0.05% of full scale;
6. Distortion: no more than 0.5%;
7. System accuracy: less than 0.5% (FS) (measured after half an hour of preheating);
8. System stability: 0.05% / h) (measured after half an hour of preheating);
9. Maximum analysis bandwidth: DC ～ 2 kHz;
10. Input mode: AC, DC, ICP, GND;
11. Filter:
a. Analog filter: cut-off frequency is 10, 30, 100, 300, 1k, PASS (Hz) six-step sub-switching;
b. DSP digital filter: cut-off frequency is 1 / 2.56 times the sampling rate;
c. Flatness (within the analysis frequency range): less than 0.05dB;
d. Stop band attenuation: -150dB / oct;
12. White noise: no more than 5μV rms;
13. Common mode rejection: greater than 100dB;
14. Common mode voltage (DC or AC peak): less than ± 10V, DC ～ 60Hz;
15. Time drift: less than 3μV / hour;
16. Temperature drift: less than 1μV / ℃;
17. A / D resolution: 16 bits;
18. Input impedance: 10MΩ or 40PF;
19. Trigger mode: manual trigger, external trigger, signal trigger;
20. Power supply: AC220V (± 10%) 50HZ (± 1 HZ) DC 12V
21. Operating environment: applicable to group conditions of GB6587.1-86-â…¡;
22. Dimensions:
317mm (length) × 236mm (width) × 133mm (height) (sixteen channels);
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