The Directional Stub Scale is a precision calibration and performance verification for the directional module in the Measurement With Drilling (MWD/LWD) equipment, designed to ensure the accuracy and stability of downhole directional measurement data. This service is critical for complex borehole trajectory control, slope angle measurement, azimuth measurement, etc., and is widely used in directional, horizontal, and rotary guided drilling operations.

Maintenance content:

1.Sensor Calibration

◎ Inertial sensors (accelerometers, gyroscopes, etc.) within the short section are calibrated using standard calibration devices to ensure their highly accurate measurement of well inclination, azimuth, and other data.

◎ Check the magnetic sensors of the short section and test their resistance to magnetic interference and azimuth measurement accuracy.

2.Short Section Module Detection

◎ Testing the sealing, vibration resistance and pressure resistance of the mechanical parts of the short section to ensure its stability in the high temperature and high pressure downhole environment.

◎ Check the signal transmission function of the electronic module and verify the compatibility of the short section with the main tool system accompanying the drill.

3.Data accuracy validation

◎ Simulate different well inclinations and azimuths under laboratory or field conditions to test the real-time measurement accuracy of short sections.

◎ Compare the calibration data with the standard reference values and calibrate the short section error range to meet industry specifications.

4.Environmental Adaptation Test

◎ Conduct high temperature and high pressure cycling tests to verify the reliability of short sections in extreme environments.。

◎ Check the immunity of the short section to external interference (vibration, electromagnetic interference, etc.).

5.Software and Algorithm Optimization

◎ Upgrade the data-processing software for short sections to improve its ability to solve borehole trajectories in real time.

◎ Optimization algorithms to reduce error accumulation in complex borehole conditions.

6.On-site service support

◎ Provide installation, commissioning and operational training for short-section equipment.

◎ Quick on-site diagnosis and troubleshooting ensures continuity of operations.

Gamma Short Pitch Scale is an important calibration exercise used to ensure the measurement accuracy of gamma logging tools over short periods of time or short ranges. This service is mainly for Logging With Drilling (LWD) and directional well operation equipment on offshore oil platforms to ensure stability and accuracy in complex environments.

Maintenance content:

1.Tool calibration and performance testing

◎ The gamma detection module was calibrated using a standard radioactive source to verify the accuracy of its response at short range and high resolution.

◎ Check the linear relationship between gamma count rate and natural radioactivity intensity to ensure that the tool performance is up to standard.

2.Sensor Module Detection

◎ Test the signal reception sensitivity of the gamma sensor and replace aged or damaged core components.

◎ Test the ability of gamma to synchronize data with other logging parameters (e.g. resistivity, density, etc.) to ensure the reliability of joint downhole multi-parameter measurements.

3.Short-section module maintenance

◎ Check the mechanical integrity of the Gamma Short Section Module, including the water and corrosion resistance of the housing, seals and connectors.

◎ Tests the electrical connections and signaling functions of the short section module to ensure compatibility with the main tooling system.

4.Environmental adaptability calibration

◎ Simulate the offshore drilling environment (high temperature, high pressure, salt spray, etc.) for tool performance testing.

◎ Verify the stability of short gamma knots under extreme conditions (high vibration or shock).

5.On-site support and technical upgrades

◎ Provide on-site operation guidance and maintenance support for Gamma Short Section.

◎ Regularly provide customers with software upgrades and hardware optimization services to improve the applicability and measurement accuracy of the equipment.

The Measurement Function Short Section is a key module in the Measurement While Drilling (MWD/LWD) system that is responsible for collecting real-time downhole formation and borehole parameter data, such as well slope angle, azimuth, pressure, temperature, gamma ray intensity, resistivity, and so on. The goal of maintenance is to ensure the accuracy of these measurements and the reliability of the equipment.

Maintenance content:

1.Sensor Calibration

◎ Check and calibrate all measurement sensors (e.g., gamma detectors, pressure sensors, accelerometers, magnetometers, resistivity probes).

◎ Ensure that the signal output from the sensor is consistent with the standard reference value and that the error is controlled within the permissible range.

2.Hardware Detection

◎ Check the mechanical integrity of the internal components of the short section, including the seals, the pressure resistance of the housing.

◎ Test the functionality of the circuit board to ensure proper signal transmission between the sensor and the main control system.

3.Environmental Adaptation Test

◎ Environmental adaptability testing simulates high temperature and high pressure downhole environments to verify the measurement performance of the short section under harsh conditions.

◎ Test the vibration and impact resistance of short sections to ensure stable operation of downhole tools.

4.Data accuracy validation

◎ Compare downhole data (well inclination, orientation, pressure, etc.) with laboratory calibration data to ensure that measurements meet standards.

◎ Detect data consistency between sensors to avoid interference or drift phenomena.

5.Software and algorithm optimization

◎ Updating the short-section data processing software to improve the real-time and accuracy of measurement data.

◎ Calibrate and optimize data filtering algorithms to reduce noise interference.

The communication function short section is responsible for data transmission and command feedback between downhole and surface, which is one of the core components of the measurement system with drilling. The core objective of its maintenance is to ensure the stable transmission of downhole data and the accurate execution of surface control commands.

Maintenance content：

1.Signal Transmission Test

◎ Test the upstream and downstream communication performance of the short section to ensure that the data transmission speed and signal strength meet the requirements.

◎ Calibrate mud pulse transmitters or electromagnetic communication modules to optimize signal demodulation performance.

2.Electronic Module Inspection

◎ Check the short section's circuit board, power module, and communication interface to ensure there are no electrical faults or poor contacts.

◎ Test the electromagnetic compatibility of the communication module to avoid the influence of downhole interference on the signal.

3.Hardware Maintenance

◎ Check the sealing of the short section housing to prevent downhole liquids or gases from entering the interior.

◎ Test and replace parts that may be worn out, such as signal transmitters, receivers, and other critical components.

4.Data transfer optimization

◎ Optimize the modulation parameters of pulse signals to improve packet integrity and transmission efficiency.

◎ Testing signal delay and transmission stability under different well depth conditions.

5.Real-time communication validation

◎ Simulate field operations and test the process of issuing commands and feedback from surface to downhole.

◎ Verify the communication reliability of communication short sections over long distances and under high voltage conditions.

The guidance function stub is the core component of a rotary guided drilling system and is responsible for controlling the borehole trajectory in real time to ensure accurate guidance and efficient operation of the drilling process.The L2 level of maintenance (intermediate level of maintenance) is the maintenance level where in-depth inspections, functional calibrations, and replacement of key components are carried out to restore the performance of the equipment and to prolong its service life.

Maintenance content：

1.Guidance control unit

◎ Calibration of the guiding force sensor inside the short section ensures that the guiding force output is accurate and the deviation is controlled within ±0.1°.

◎ Verify the operational stability of the guided modes, including the steady-slope mode and the curvature adjustment mode.

2.Borehole Trajectory Sensor

◎ Tests the functionality of accelerometers, gyroscopes, and other sensors, and corrects well inclination and azimuth measurement data.

3.Guide rib and rotating drive shaft

◎ Check guide ribs for wear and replace as necessary.

◎ Tests the torque output and sealing of rotary drive shafts to ensure stable operation under high load conditions.

4.Miniature Hydraulic Module

◎ Check the pressure output of the hydraulic system to detect possible leaks or pressure loss problems.

◎ Replace deteriorated hydraulic lines or seals.

5.Control Electronics Module

◎ Tests the reception and execution functions of guidance control commands to ensure that ground commands can be transmitted quickly and accurately.

◎ Calibrate the data synchronization between the well inclination sensor and the guidance system.

6.Power Supply and Communication Module

◎ Check internal power systems to ensure stable power supply under underground conditions.

◎ Test communication links to optimize the response speed of guided commands.

7.High temperature and high pressure performance verification

◎ Tested short section performance at simulated high temperatures (150°C) and high pressures (30,000 psi).

◎ Ensures no performance degradation of the guiding function in extreme environments.

8.Vibration and Shock Testing

◎ Vibration and Shock Testing

9.Control logic optimization

◎ Upgraded the internal software of the short section to improve guidance accuracy and real-time adjustment capability.

10.Data processing optimization

◎ Improved filtering and deconvolution algorithms for guided data to reduce noise interference.

11.Documentation and reporting updates

◎ Provide detailed maintenance reports including calibration data, replacement part records and performance verification results.

◎ Update the equipment operation history to provide reference for subsequent high-level maintenance.

The Guided Functions Short Section L3 level of maintenance is a high level maintenance service for complete dismantling, in-depth inspection and performance restoration of the equipment. This level of maintenance is designed to extend the service life of the equipment, repair severe wear and tear or potential failures, and ensure reliable operation of the knuckle under high loads and in extreme environments.

Maintenance content：

1.Complete disintegration of the short segment

◎ Disassemble all mechanical, hydraulic and electronic components, checking each critical component for integrity and wear.

2.Component Depth Inspection

◎ Non-destructive testing techniques (e.g., ultrasound, X-ray, etc.) are used to check internal components for micro-cracks or material fatigue.

◎ Detailed dimensional measurements and morphological analysis of core components such as guide ribs, rotary drive shafts, and hydraulic modules.

3.Repair of mechanical parts

◎ Remachine or replace worn or deteriorated parts such as guide ribs, rotary drive shafts, seals, etc.

◎ Complete upgrade of the hydraulic system, including replacement of hydraulic pumps, valves and high pressure lines.

4.Electronic module replacement

◎ Replace aging circuit boards, sensors and communication modules to ensure stable electrical performance of the equipment.

◎ Upgrade the power supply system to improve the reliability of underground power supply.

5.Guidance accuracy calibration

◎ Calibration of the guidance control unit ensures that the guidance accuracy meets the highest industry standards (deviation of less than ±0.05°).

◎ Testing the stability of the guiding force output under different borehole conditions.

6.Sensor Calibration

◎ Multi-point calibration of accelerometers, gyroscopes, pressure sensors, etc. to ensure high accuracy of data acquisition.

◎ Optimize sensor-control system linkage performance to reduce data lag.

7.High temperature and high pressure limit test

◎ Operating environments up to 150°C and 30,000 psi are simulated to verify the performance stability of the short section.

8.Extreme vibration and shock testing

◎ Simulates downhole high-frequency vibration and torsional shock conditions to ensure the durability of short section components.

9.Long-term operational reliability test

◎ Continuous drilling conditions were simulated in the laboratory to test the performance degradation of short sections under prolonged operation.

10.Intelligent Optimization

◎ Upgrade the software system for short sections of the guidance function to improve real-time control of the borehole trajectory.

◎ Integrate the latest algorithms and diagnostics for automated fault warning.

11.Compatibility Optimization

◎ Check the compatibility of the short section with other equipment accompanying the drill to ensure stable system integration.

12.comprehensive report

◎ Provide detailed maintenance files, including disassembly and inspection results, maintenance records and performance test data.

13.Lifespan assessment

◎ Provide equipment life estimation and usage recommendations based on inspection and test results.

The Module 675 Motor Function Stub is a key component in directional and rotary guided drilling systems whose core function is to provide rotary drive to the drilling tool.The L2 level of maintenance (Intermediate Maintenance) is aimed at restoring the performance of the Motor Function Stub through an in-depth inspection and replacement of components to ensure its stable operation under high load conditions.This is the first time that a motor function stub has been used in a directional and rotary guided drilling system.

Maintenance content：

1.Core component testing and calibration

◎ Motor Internal Component Inspection: Inspect the motor stator and rotor for wear or corrosion. Test the torque output and speed of the motor to ensure that its power performance is up to standard.

◎ Drivetrain Inspection: Detects wear on drive shafts and bearings to ensure smoothness of rotating parts. Verify gears or drive chains for bias wear or poor mesh.

2.Hydraulic and Sealing System Maintenance

◎ Hydraulic System Inspection: Test the flow and pressure output of hydraulic channels to ensure hydraulic transmission efficiency. Check the cleanliness of the hydraulic fluid and replace aged or contaminated hydraulic fluid.

◎ Seal performance check: Replace worn or deteriorated seals and O-rings to prevent downhole mud or fluid intrusion. Testing the seal integrity of short section housings to ensure internal components are not contaminated.

3.Environmental Adaptation Test

◎ High Temperature, High Pressure Test: Simulates maximum temperatures of 150°C and 30,000 psi to verify the performance stability of motor stubs.

◎ Vibration and Shock Test: Tests the stability of short sections under high-frequency vibration and shock conditions to ensure the safety of downhole operations.

4.Data monitoring and performance optimization

◎ Motor operation data analysis: Evaluate motor speed, torque and power output through real-time operation data to optimize operation parameters.

◎ Software and control logic update: Upgrade the software embedded in the short section to improve its linkage and response speed with the downhole control system.

5.Mechanical component replacement and commissioning

◎ Critical Component Replacement: Replace badly worn stator, rotor or bearing components. Repair or replace deteriorated hydraulic lines and seals.

◎ System commissioning and calibration: All mechanical and hydraulic components are fully commissioned to ensure that the short section meets factory performance standards.

6.Documentation and Reports

◎ Provides a detailed record of the maintenance process, including inspection, repair, replacement and calibration data.

◎ Output performance test report to provide reference for subsequent L3 level maintenance or upgrade.

L3 level maintenance is a high-level maintenance service for the 675 module motor function short section, covering full disassembly, in-depth inspection and performance restoration. By repairing and replacing the core components, it ensures that the short section maintains its efficient and stable working capacity in extreme downhole environments and extends the service life of the equipment.

Maintenance content：

1.Full disassembly and in-depth inspection

◎ EQUIPMENT DISASSEMBLY: Perform a complete disassembly of the motor short section and inspect each component one by one, including the stator, rotor, drive shaft, bearings and sealing system.

◎ Component Inspection: Inspect key components for material fatigue, cracks and corrosion, measure the wear and tear of mechanical components, and confirm that replacement criteria have been met.

2.Critical component replacement and repair

◎ Stator and Rotor: Replace severely worn or corroded stators and rotors to ensure consistent power output. Re-machine or replace the rotor surface coating to improve corrosion resistance.

◎ Drive components: Replace drive shafts and bearings to ensure smoothness and durability of rotating parts. Test and repair gear mesh accuracy to avoid power loss.

◎ Hydraulic and Sealing Systems: Replace hydraulic pumps, hydraulic lines and deteriorated seals to restore hydraulic performance. Tested sealing systems for pressure resistance to ensure zero leakage.

3.Deep Performance Calibration

◎ Motor Output Performance Test: Test the torque output, speed and efficiency of the motor at full power to ensure that the power performance meets the design requirements.

◎ Hydraulic System Calibration: Calibrate the flow and pressure of the hydraulic channels to optimize the transmission efficiency of the hydraulic system.

◎ Precision tuning: Calibrate the linkage between the motor and the transmission system to ensure accurate torque and speed regulation.

4.Extreme Environment Adaptability Verification

◎ High Temperature, High Pressure Testing: Verify the performance stability of short sections in a simulated 150°C temperature and 30,000 psi pressure environment.

◎ Vibration and Shock Resistance Test: Simulates high-frequency vibration and downhole shock conditions to test the durability and shock resistance of short-section components.

◎ Long-time operation test: Long-time continuous operation test in the laboratory to detect the stability and performance degradation of the equipment.

5.Software upgrades and intelligent optimization

◎ Control Logic Update: Upgraded the software system of the motor short section to enhance real-time power adjustment and troubleshooting capability.

◎ Data Logging and Monitoring Optimization: Enhance data logging and monitoring capabilities for short sessions to provide accurate performance data support for long-cycle operations.

6.Documentation and Performance Reporting

◎ Detailed maintenance records: Provide records of inspection, repair and replacement of each component.

◎ Performance Test Report: Outputs a complete performance verification report, including power output, hydraulic performance and environmental suitability results.

◎ Service life assessment: Provides an assessment of the remaining service life of the equipment based on the inspection data, helping the customer to formulate an equipment management plan.

IT (Inner Tension) coils and OT (Outer Tension) coils are important components used to transmit electromagnetic energy or signals in industrial equipment, commonly found in motors, transformers and high-precision control systems. Maintenance services focus on restoring performance, insulating and extending the life of coils to ensure the stability and safety of equipment operation.

Maintenance content：

1.Testing and Diagnostics

◎ Measure the resistance and inductance values of the coil and the number of turns of the coil to check whether there are open circuits, short circuits or short circuits between turns. Test the electromagnetic performance of the coil to confirm that its transmission efficiency meets the design requirements.

◎ Use a high voltage insulation tester to check the insulation resistance of the coil and confirm whether there is any leakage. Check whether the insulation of the coil is aged, broken or cracked.

◎ Detects coil operation in high-temperature environments and assesses the risk of overheating or damage.

2.Coil Repair

◎ Clean dust, oil and impurities on coil surface. Repair partially or replace the broken or aged insulation as a whole.

◎ Rewind damaged coils according to original specifications to ensure that the number of turns and dimensions meet design requirements. Use high quality insulation and wire to improve coil durability and efficiency.

◎ Check the fixing of the coil to the core components of the equipment (e.g. core, frame) and readjust or replace fasteners if necessary. Ensure that the coil is centered and balanced to avoid vibration or noise during operation.

3.performance testing

◎ Load tests were performed on the repaired coils to verify resistance, inductance values and transmission performance.

◎ Retest the insulation resistance of the coil to ensure that it can withstand the rated voltage without leakage.

◎ Simulates equipment operating conditions and tests the performance stability of coils at high temperatures or under continuous operation.

4.Upgrades and Optimizations

◎ 使用更高性能的绝缘材料或导线，提高线圈的耐高温和抗腐蚀能力。

◎ Adjust the design parameters of the coil according to the needs of equipment upgrading to improve the overall efficiency of the equipment.

Channel boards are key components in electronic equipment, widely used in industrial control systems, measurement with drilling (MWD/LWD), the main functions include signal processing, data transmission and communication between modules. Repair service is aimed at restoring the normal function of the channel board, troubleshooting and ensuring the efficient operation of the equipment.

Maintenance content：

1.fault diagnosis

◎ Electrical performance testing: use a multimeter, oscilloscope and other tools to test the power circuit on the channel board, signal path is normal. Test the working status of chips and electronic components to confirm whether there are overheating, short circuit or failure problems.

◎ Data channel detection: Test the signal transmission path of the channel board to confirm whether there is signal loss, distortion or noise problems. Analyze the transmission rate and stability of communication interfaces (such as SPI, I2C, CAN, etc.).

◎ Environmental Adaptability Evaluation:: Check whether the channel board operates normally under high temperature, high humidity or vibration environments.

2.Parts Repair and Replacement

◎ Critical Component Replacement: Replace damaged components, including capacitors, resistors, transistors, relays, and interface modules. Replace aged or damaged connectors and solder joints to ensure proper electrical connections to the channel board.

◎ PCB Repair: Repair broken lines or burnt areas on PCB boards and re-route wires. Clean and repair oxidized or corroded PCB sections.

◎ Interface repair: Repair damaged physical interfaces (e.g., pins, slots). Ensure compatibility between the interface module and the main system.

3. Performance debugging and calibration

◎ Signal path calibration: Calibrate the input and output matching of the signal channels to reduce signal distortion. Debug signal synchronization and delay problems between multi-channel boards.

◎ Data transmission test: Use standard test equipment to verify the transmission rate, data integrity and stability of the channel board.

◎ Power consumption and temperature test: Test the power consumption level of the channel board to ensure stable operation under rated conditions. Check the working status of thermal components to optimize the heat dissipation performance of the channel board.

4. Cleaning and Protection

◎ Surface Cleaning: Remove dust, oil, and impurities from the surface of the channel board to ensure clean circuitry.

◎ Protective treatment: add insulation coating or anti-corrosion coating to enhance the adaptability of the channel board in harsh environments. Add protective cover or sealing treatment to the critical areas of the channel board.

Electronic components are the core components of offshore oil and gas equipment, which are widely used in Measurement While Drilling (MWD/LWD), Rotary Guidance System (RSS), control modules and data transmission systems. Maintenance service is aimed at the aging, damage and performance degradation of components, through accurate inspection, repair and optimization, to ensure the long-term stable operation of the equipment.

Maintenance content：

1.fault detection

◎ Electrical Characteristics Test: Measure the parameters of resistance, capacitance, inductance, etc. to troubleshoot short circuit, open circuit or short circuit between turns.

◎ Functional diagnosis: Test the input and output signals of IC chip to confirm whether there is short circuit, open circuit or damage. Perform on/off tests on connectors and solder joints to confirm whether there is poor contact.

◎ Thermal stability assessment: Use a thermal imaging camera to check the thermal distribution of components and locate parts with abnormal heat generation.

2. Repair and Replacement

◎ Component Replacement: Replace electronic components that are aging, failing, or have substandard performance, such as resistors, capacitors, and IC chips. According to the design requirements, select high-quality alternatives to enhance the overall system performance.

◎ Soldering Repair: Use professional soldering tools to repair false soldering or desoldering components to ensure reliable connections. Repair broken lines or burnt areas on PCB boards.

Interface Repair: Overhaul damaged physical interfaces (e.g., USB, Ethernet ports, HDMI ports, etc.) to ensure normal data and power transmission.

3. Performance Optimization

◎ Circuit Debugging and Calibration: Adjust resistor, capacitor, or inductor values to optimize circuit performance. Calibrate analog circuits and digital signal paths to improve signal stability and accuracy.

◎ Thermal optimization: Add heat sinks or apply thermal grease to improve the thermal performance of components. Redesign the layout of thermal components to reduce the risk of heat buildup.

4.Protection and maintenance

◎ Surface cleaning: Remove dust, oil and oxides from the surface of the components.

◎ Protective treatment: Coated with anti-corrosion coating or moisture-proof coating to enhance the adaptability of components in harsh environments. Sealing protection for circuit boards to avoid the intrusion of external pollutants.

SSD (Solid State Drive) Solid State Drives are widely used in industrial equipment due to their high speed, low power consumption and lack of mechanical parts. SSDs may suffer from performance degradation, data loss or hardware failure due to long-term use or external environmental influences. Our repair and maintenance services are designed to repair faulty SSDs, recover data and extend the life of the drive.

Maintenance content：

1.fault diagnosis

◎ Hardware Inspection: Use professional tools to inspect the working status of circuit boards, capacitors, resistors and control chips. Check the power module and interface circuits to confirm whether there is any short-circuit, soldering or overheating problem.

Firmware Diagnostics: Detect the SSD firmware version and operating status to confirm if the device is unrecognized or has degraded performance due to firmware issues.

◎ Health Status Evaluation: Use professional software to detect the health status of the SSD (SMART value), and analyze the hard drive life and bad block situation.

Data Detection: Check the file system integrity to confirm the presence of logical bad blocks or data corruption.

2. Hardware Repair

◎ Circuit Board Repair: Replace damaged capacitors, resistors, transistors or interface modules. Repair problems caused by external force or overheating resulting in PCB board breakage or solder joint detachment.

◎ Flash particle repair: test and repair damaged NAND flash particles and replace them if necessary.

◎ Controller repair: check the working status of the main control chip and replace the failed control chip.

3.data recovery

◎ Logical Data Recovery: Repair damaged file systems and partition tables to restore normal read and write capabilities.

◎ Physical Data Recovery: Use special equipment to extract data stored in NAND flash memory, even if the hard disk is not recognized.

◎ Bad Block Management: Marks and isolates logical bad blocks, reallocates available space, and improves hard drive stability.

4.Firmware upgrade and optimization

◎ Firmware update: Install the latest version of SSD firmware to fix known compatibility and performance issues.

Parameter Optimization: Optimize the TRIM command, garbage collection and wear leveling functions to improve the read/write speed and lifetime of the drive.

5. Performance Tests

◎ Read and Write Speed Tests: Use test software to verify the actual read and write speeds of the SSD to ensure that it meets design specifications.

◎ Temperature and power consumption test: Test the temperature and power consumption of the hard disk under high load conditions to avoid overheating or abnormal power consumption.

Program and identification code authorization is an important link in the digital management of offshore oil equipment, which is used to ensure the normal operation of software programs and the legitimacy of operating privileges of key equipment. The authorization service binds the equipment with a unique identification code to ensure the safe, efficient and compliant operation of the equipment functions, which is especially suitable for the use of high-precision equipment in the environment of directional drilling, measurement with drilling (MWD/LWD), rotary guidance system and other high-precision equipment.

Maintenance content：

1.Program authorization management

◎ Software program installation and activation: Provide the software program required by the device and legally authorize it. Use the activation code to bind the program with the hardware device to ensure that the program can only run on the specified device.

◎ Software update: Provide the latest version of the device program, optimize the function and performance. Repair software vulnerabilities to improve system stability and security.

◎ Module unlocking: Unlock specific functional modules of the device according to user requirements, such as measurement function, data analysis module or real-time monitoring module.

2.Identifier management

◎ Device binding and identification: Generate a unique identification code (UID) for each device, binding the program and device hardware to achieve personalized authorization. The UID can be used for full life cycle tracking of the equipment, including factory, maintenance and end-of-life.

◎ Permission hierarchy management: Provide different levels of access (e.g., operators, technical engineers, administrators), and restrict or grant the corresponding functional permissions through identification codes.

◎ Remote Authorization: Supports online or offline identification code activation for remote management and emergency authorization.

3.Data security and encryption

◎ Encryption technology: AES, RSA and other high-strength encryption algorithms are used to protect the program and identification code to prevent illegal cracking or tampering.

◎ Anti-theft mechanism: Prevent unauthorized use of the device or software by periodically verifying the legitimacy of the identification code and program.

◎ Logging: Record all authorized operations to ensure the traceability of program usage.

4.Technical Support and Maintenance

◎ Authorization Recovery: For the authorization of lost or damaged equipment, to provide re-authorization services, rapid recovery of equipment functions.

◎ On-site support: Provide technical engineers on-site support to ensure the smooth completion of the equipment authorization process.

◎ Authorization Expansion: According to the project requirements, expand the authorization scope of the device or add new functional modules to support.

Metal explosion-proof plugs are widely used connectors in high-risk environments such as offshore oil platforms, mainly used for the safe connection of electrical equipment to prevent the risk of explosions caused by sparks or high temperatures. Regular maintenance ensures the sealing, durability and electrical performance of explosion-proof plugs, guaranteeing the safe and efficient operation of offshore operations.

Maintenance content：

1.Appearance and Mechanical Structure Inspection

◎ Shell integrity check: check the metal shell for cracks, corrosion or deformation to ensure its explosion-proof performance. Confirm the tightness of the threaded connection to prevent loosening from affecting the explosion-proof effect.

◎ Sealing performance testing: check whether the seal is aging, broken or loss of elasticity. Replace the deteriorated seals to ensure that the airtightness meets the explosion-proof requirements.

◎ Plug and socket fit test: test the plug and socket insertion force, to avoid loosening caused by poor electrical contact.

2.Electrical Performance Testing

◎ Contact resistance test: Use specialized equipment to test the contact resistance value of the plug to ensure that it is below the industry standard range.

◎ Insulation test: A high voltage insulation test is performed to verify that the electrical insulation of the plug is normal.

◎ Conductivity check: Test the integrity of the wire connections inside the plug to make sure there are no breaks or false connections.

3.Verification of explosion-proof performance

◎ Shell explosion-proof rating check: verify the structure of the plug in accordance with explosion-proof standards (e.g. Ex d, Ex e).

◎ Temperature rise test: simulate the temperature rise under high current load conditions to ensure that the plug will not fail due to overheating.

◎ Environmental adaptability test: simulate the performance under high humidity, high salt spray and vibration conditions to verify the adaptability of the plug in the marine environment.

4.Cleaning and Lubrication

◎ External cleaning: Remove salt spray, oil and corrosion from the surface of the housing.

◎ Conductive parts lubrication: Protect the pins and jacks with a special conductive lubricant to reduce wear and oxidation.

◎ Threaded Part Lubrication: Lubricate the threaded connection parts to prevent rust or jamming and improve ease of operation.

5. Replacement and Repair

◎ Component Replacement: Replace damaged or deteriorated pins, jacks, seals and housings.

◎ Solder Repair: Repair cracked solder joints inside the plug caused by vibration or aging.

◎ Cable Gland Disposal: Inspect and replace damaged cable glands to ensure a secure connection to the plug.

Gravel pack is a common cementing and sand control measure used during offshore oil drilling and completions to stabilize the borehole, prevent formation sands from intruding into the wellbore, and optimize oil and gas production performance. Maintenance services are designed to ensure the integrity and effectiveness of the gravel pack system, extend equipment life and improve production efficiency.

Maintenance content：

1.Gravel Pack Status Detection

◎ Physical Integrity Check: Test the compaction of the Gravel Pack in the wellbore to ensure that there are no voids or looseness in the sand fill. Observe the uniformity of Gravel Pack distribution through downhole imaging techniques (e.g. sonic scanning or video inspection).

Sand Stability Measurement: Samples are taken to analyze the grain size distribution of the Gravel Pack to confirm that it has not been affected by formation compression or well fluid erosion. Test the strength and abrasion resistance of the sand to ensure it still meets design standards.

2.Sand control equipment testing

◎ Screen Pipe and Casing Inspection: Inspect the apertures of sand control screen pipes for clogging or erosion to ensure that fluid passages are clear. Inspect casing for corrosion, cracks, or mechanical damage.

◎ Downhole Tools Inspection: Check the operational status and sealing performance of well completion tools (e.g., sand fillers, sand wash tubes). Ensure sand control valves and tool joints are intact.

3.Wellbore Pressure Test

◎ Injection Pressure Test: Simulate fluid injection under oil and gas production conditions to test the Gravel Pack's pressure-bearing capacity.

◎ Fracturing and Pressure Return Tests: Fracturing and pressure return tests of the formation and sand fill system are conducted to ensure that the Gravel Pack formation is stable during production.

4.Cleaning and Restoration

◎ Wellbore cleaning: Use sand flushing tools to remove mud deposits and blockages in the wellbore. Apply high-pressure flushing techniques to clean clogged pores in screen tubing.

◎ Sand Fill Layer Repair: Refill or replenish loose or lost sand layers to ensure the thickness and uniformity of the Gravel Pack. Select erosion-resistant, high-strength sand grains for replacement to improve system durability.

5.performance optimization

◎ Optimization of sand selection: Redesigned the sand screening criteria according to the size of formation particles to ensure the match between Gravel Pack and formation particles.

◎ Sand control equipment upgrade: Replaced high-performance sand control screen tubes and corrosion-resistant casing to improve system life. Installation of new sand filling control device to improve sand injection efficiency and uniformity.

High-speed module is a key electronic component in offshore oil equipment, which is mainly used for high-precision and high-speed data acquisition, processing and transmission, and is widely used in the fields of Measurement While Drilling (MWD/LWD), Rotary Guidance System (RSS), remote monitoring and data communication. The maintenance of high-speed modules is aimed at ensuring the operational stability, data transmission speed and processing capability of the modules, prolonging the life of the equipment and guaranteeing the high efficiency of offshore oil and gas operations.

Maintenance content：

1.Hardware Detection and Repair

◎ Circuit Board Inspection: Check the integrity of the PCB board of the high-speed module, including solder joints, alignments, and connectors. Use an oscilloscope to test the signal integrity of the board to ensure that there is no signal distortion or attenuation.

◎ Interface performance testing: Test the electrical characteristics and physical state of the module's high-speed interfaces (e.g., fiber-optic interface, Ethernet interface). Test the contact reliability of plugs and sockets to remove oxidation or corrosion.

◎ Chip working condition : test the processing chip (FPGA, DSP, etc.) operating temperature, voltage and frequency. Replace damaged or aged chips, crystals or memories.

2.Data processing and transmission optimization

◎ Data channel detection: Test the data processing channel of high-speed module to ensure the integrity and real-time of the collected and transmitted data. Optimize the module data transmission path to reduce delay and packet loss.

◎ Cache and bandwidth tuning: Check the module's memory usage, optimize cache settings to improve data throughput. Debug the efficiency of the module's bandwidth usage to avoid performance degradation due to congestion.

3.Environmental adaptation testing

◎ High Temperature and High Pressure Test: Simulate the environment of an offshore well to test the performance of the high-speed module under high temperature (over 150°C) and high pressure (30,000 psi) conditions.

◎ Anti-vibration test: Verify the stability of the module under strong vibration conditions through vibration experiments to ensure that there is no loosening of the solder joints and connectors.

◎ Humidity and corrosion resistance testing: Test the module's corrosion resistance in high humidity and salt spray environments to repair damaged coatings or interfaces.

4.Software maintenance and upgrades

◎ Firmware Upgrade: Update the module firmware, optimize the algorithm, improve the efficiency of data acquisition, processing and transmission.

◎ Functional debugging: Calibrate the module's sampling frequency, transmission rate and other key parameters to ensure that it meets the needs of field operations.

◎ fault diagnosis software support: integrated module self-diagnosis function, real-time monitoring of operating status and provide abnormal alarms.

5.Protection and Cleaning

◎ Surface Cleaning: Remove dust, oil and salt from the surface of the module to avoid short-circuiting or performance degradation of the circuit board.

◎ Protective treatment: Coated with moisture-proof and salt spray-proof coatings to enhance the module's adaptability in harsh environments. Add protective cover or seals to further improve corrosion and impact resistance.

The motherboard is the core component of each subsystem in offshore oil equipment, responsible for data processing, command execution and equipment communication, and is widely used in Measurement While Drilling (MWD/LWD), Rotary Guidance System (RSS), control system and communication module. Due to the complexity of the marine environment and the frequent operation of the equipment, regular maintenance of the motherboard can effectively prevent failures, extend the life of the equipment, and ensure the successful completion of critical tasks.

Maintenance content：

1.Electrical Performance Testing

◎ Software program installation and activation: Use professional test equipment to check the voltage, current and signal integrity on the motherboard to ensure that the power supply and communication lines are normal. Measure the working status of key chips (CPU, FPGA, memory, etc.), including voltage, current and frequency.

◎ Interface and connection check: Check the connection integrity and signal transmission quality of motherboard interfaces (e.g., serial ports, Ethernet ports, fiber optic interfaces, etc.). Test the solder joints and connectors for loose, false soldering or oxidization problems.

◎ Environmental Adaptability Evaluation: Test the working stability of the motherboard under high temperature, high humidity, and high salt spray conditions to ensure that it adapts to the harsh marine environment.

2.Motherboard Repair and Replacement

◎ Component Replacement: Replace damaged or aged capacitors, resistors, transistors, interface modules and other key components. Replace damaged processors, memory chips or communication modules to ensure normal system operation.

◎ PCB repair: Repair PCB cracks or solder joint damage caused by high temperature and high vibration. Clean up corroded circuit areas and re-route or solder repairs.

◎ Interface repair: replace or repair damaged interface modules (such as USB, RS232, RJ45, etc.).

3.Motherboard Performance Debugging

◎ Signal Integrity Calibration: Debug the signal path of the motherboard to ensure stable and distortion-free data transmission. Calibrate the delay and jitter of data channels to improve communication efficiency.

◎ Key Parameter Testing: Test the read/write speed of CPU, memory, and storage devices to ensure compliance with device design requirements. Verify motherboard bus speed and communication protocol compatibility.

4.Software and Firmware Upgrades

◎ Firmware Update: Update motherboard firmware to optimize device performance and fix known vulnerabilities. Upgrade BIOS or embedded system to improve hardware resource utilization.

System Debugging: Test the compatibility between software and hardware, optimize the operating parameters, and reduce lag or delay. Integrated fault diagnosis and warning functions to improve the reliability of motherboard operation.

5.Protection and Cleaning

◎ Surface cleaning: Use non-destructive cleaning tools to clean the dust, salt and stains on the surface of the motherboard to prevent short-circuiting or performance degradation.

◎ Protective Coating Treatment: Apply moisture, salt spray, and corrosion resistant coatings to the motherboard surface to enhance its resilience in the marine environment.

Thermal management optimization: Clean the heatsinks and fans, and apply thermal conductive silicone grease to improve the thermal performance of the motherboard.