Debuting at the cippe Chengdu Petroleum Exhibition, gyro-oriented subs offer high-precision, non-magnetic guidance solutions.

On the first day of the Chengdu International Petroleum and Petrochemical Technology and Equipment Exhibition, we showcased two MEMS gyro-oriented subs—the ER-Gyro-15 and ER-MNS-09. Designed with "anti-magnetic interference, high precision, and resistance to extreme conditions" as core goals, both products are targeted at critical scenarios such as measurement while drilling and directional drilling. They utilize advanced inertial measurement technology to address performance bottlenecks of traditional inclinometer equipment, providing precise directional support for oil and petrochemical exploration and development, pipeline engineering, and other sectors.

ER-Gyro-15 MEMS Gyro-Orienting Sub

The ER-Gyro-15 is a device that addresses the azimuth measurement accuracy issues of traditional magnetic sensor inclinometers in casing, drill pipe, and well sections with strong magnetic interference. It utilizes gyro-oriented guidance by sensing the Earth's rotational angular velocity, making it particularly suitable for accurate parameter output in shallow well sections. Core Technical Features
Small-hole inclination measurement capability: This overcomes the technical limitation of traditional gyro tools, which cannot output effective azimuth angles at low inclinations. The system can now output azimuth and toolface angles at inclinations ≥ 1°. Azimuth accuracy is maintained within 3° at inclinations of 1°-2°, meeting the requirements for orientation in shallow and horizontal wells.

Measurement Technology Architecture: Utilizing a three-axis MEMS gyroscope and a three-axis MEMS accelerometer, this system utilizes stable and reliable strapdown inertial measurement technology. It achieves orientation solely by sensing the Earth's rotational angular velocity, eliminating the need for reliance on the Earth's magnetic field. This eliminates the impact of magnetic interference from casing, tubing, and drill pipe on measurement accuracy.

Extremely Miniaturized: Available in diameters of only 25.4mm and 30mm, with a length of 120mm and a weight of ≤150g, it easily fits into confined spaces such as probes and drill pipe.

All-solid-state design: Its all-solid-state design, devoid of moving parts, offers excellent shock and vibration resistance, adapting to the harsh mechanical environment of drilling operations. It can also dynamically maintain azimuth, inclination, and toolface angle accuracy under random vibration conditions, adapting to the high-frequency vibration environment encountered during drilling.

Fast Alignment and Measurement Mode: 30-second rapid alignment achieves 1° azimuth accuracy, while 90-second precise alignment improves this to 0.5°, significantly reducing measurement time and improving drilling efficiency. It also offers three measurement-while-drilling (MWD) modes: continuous measurement, and spot measurement, allowing for flexible selection based on actual needs.

Key Performance Parameters

Accuracy: Designed for the core needs of the petroleum and petrochemical industry, the ER-Gyro-15 offers azimuth accuracy ranging from 0.5° to 1°, stable inclination alignment accuracy of 0.1°, and gyro toolface angle accuracy of 1°/secL (L represents latitude), ensuring reliable measurement of the three parameters of "azimuth, inclination, and toolface." Furthermore, both azimuth and attitude accuracy can be maintained for up to 20 minutes, ensuring parameter stability during long-term measurements. Measurement Range: The measurement range fully covers the full range of oil drilling well types, including azimuth measurement from 0 to 360°, inclination measurement from 0 to 180°, gravity tool face angle measurement from -180 to 180°, and gyro tool face angle measurement from 0 to 360°.
Full Temperature Compensation: The basic model has an operating temperature of 5 to 85°C and a storage temperature of 0 to 90°C. The ER-Gyro-15H model has an extended operating temperature of 5 to 125°C and a storage temperature of 0 to 130°C, adapting to both conventional land wells and high-temperature deep well scenarios. In the petroleum and petrochemical sectors, the ER-Gyro-15's applications focus on three core scenarios: First, measurement while drilling (MWD). By collecting real-time data on borehole azimuth, inclination, and toolface angle, the ER-Gyro-15 dynamically controls the drilling trajectory, significantly reducing traditional measurement time and significantly improving drilling efficiency. Second, it provides inclination and north-finding for oil wells. In magnetically anomalous well sections, such as those with cased holes and drill pipe interference, the ER-Gyro-15 replaces traditional magnetic sensor inclinometers. Its self-seeking function allows for precise positioning of geographic true north, ensuring the validity of logging data. Third, in measuring shallow well sections, the ER-Gyro-15 can accurately output valid measurement data even under the dual constraints of shallow well sections and magnetic interference.

ER-MNS-09 MEMS Gyro Orienteering Nipples

The ER-MNS-09 features a special-shaped cylindrical design. Its core is a high-precision, self-seeking MEMS gyroscope that determines geographic true north by measuring the Earth's rotational component. It is independent of the Earth's magnetic field and can operate stably in complex environments associated with the petroleum and petrochemical industries, such as underground metal pipelines and strong electromagnetic interference. It also offers advantages such as shock and vibration resistance, compact size, light weight, and low power consumption.

Core Technical Advantages

Specialized Structure and Spatial Adaptability: The special-shaped cylindrical design (30mm diameter, 120mm length) weighs ≤150g and can be flexibly embedded in a probe, the back end of a drill bit, or the guide head, making it suitable for operations with limited space.

All-Solid-State Design for Harsh Environments: The built-in inner platform and all-solid-state design offer exceptional shock and vibration resistance, making it resistant to the intense shock and vibration experienced during drilling, as well as humidity, dust, and strong electromagnetic interference. High-precision azimuth and attitude measurement: North-seeking via a static base (with a 5-minute north-seeking time) provides azimuth, pitch, and roll angle output. Azimuth accuracy reaches up to 0.25°, with 20 minutes of high-precision hold time. Attitude accuracy is ≤0.2° (1σ), ensuring parameter stability during long-term operations.

Wide operating temperature range and low power consumption: The basic model operates from 5°C to 55°C, while the high-temperature model supports 5°C to 125°C, meeting the requirements of specialized oil and petrochemical environments such as deep wells and deserts. Power consumption is only 3W, making it suitable for downhole battery-powered applications.

Key Performance Parameters

The ER-MNS-09 is available in multiple models based on accuracy requirements, with varying degrees of azimuth accuracy: 1° for the ER-MNS-09A/HA, 0.5° for the ER-MNS-09B/HB, and 0.25° for the ER-MNS-09C, providing flexibility to meet different accuracy requirements. The inclination measurement range is -85° to 85°, and the azimuth measurement range is 0° to 360°, meeting the measurement requirements of the drilling process. The data update rate is uniformly 100Hz, and the communication interface uses RS-422 to ensure real-time transmission of measurement data.

The ER-MNS-09 MEMS gyroscopic submount offers a complete solution with high precision, strong noise immunity, compact size, and low power consumption, making it an indispensable directional sensing core in complex underground environments. It is particularly suitable for directional drilling operations in strong interference and non-magnetic conditions, and is a key technology and equipment for improving engineering accuracy and reliability.