The relevance of the use of high-precision gyroscopes
The depletion of hydrocarbon reserves and the complexity of development lead to the use of advanced and highly efficient technologies. In the field of geosteering, high-precision gyroscopy technology plays a significant role for safe and efficient wellbore positioning. In recent years, leading oil and gas companies have tightened control over compliance with the following criteria when drilling:
- high-precision determination of the wellbore position in order to correct the trajectory during drilling and optimize its trajectory;
- prevention of wellbore intersections;
- detailed verification of compliance of the actual wellbore trajectory with the project one.
Atlas Drilling’s North-seeking drop gyro is excellent at solving these and other challenges in well navigation and positioning.
Atlas Drilling offers a range of services in the field of well navigation and positioning using the latest and innovative solutions available on the global geosteering market. Our goal is to perform services with the highest quality standards, allowing us to provide maximum information and reliability of the data for Customers.
ATLAS GYRO is a reliable and proven high precision North-seeking gyro. Atlas Gyro has been successfully used in many jobs in North and South America, the Middle East, Australia, Europe and Africa. Its feature is the combination of a number of advanced technical achievements and solutions in one measuring system. In addition, the Atlas high-precision gyroscope is capable of operating in wells of any profile, including horizontal ones.
FEATURES OF ATLAS DRILLING GYROSCOPE:
The gyrocompass mode provides the function of finding the geographic North. This allows the instrument to obtain independent azimuth readings at each measurement point. The True North self-seeking mode ensures that each azimuth measurement is independent. This distinguishes the Atlas Drilling Gyro from inertial gyroscopes, which depend on wellhead alignment and uncontrolled accompanying errors. The gyrocompass mode greatly improves the quality control of the received data. It allows to eliminate errors of the “human” factor of the wellhead orientation of the tool. The independence of the gyrocompass readings makes it possible to perform measurements in conditions with external factors of influence (vibration, rotations, flushing, sticking, etc.).
The drop gyroscope is a memory recording while pulling out the drillstring (or tubing) assembly. The drop high-precision gyroscope allows not to stop drilling and technological processes of well construction for measuring the trajectory. Also, this method of registration allows you to explore the trajectory of horizontal wells without the use of such expensive delivery means as coiled tubing or a downhole tractor. Thus, the resettable high-precision gyroscope increases the economic efficiency of the operations performed. This distinguishes the drop gyroscope from traditional downhole equipment delivery systems.
HD (High-Density) recording mode allows you to obtain high resolution data. This is possible due to the continuous recording of the tool between stops. MWD systems mainly record survey data with an interval of 9-27 meters. So registration occurs only after pulling out a pipe or stand (2-3 pipes). The HD recording mode reduces the registration step to 0.1 – 1 meter. Increasing the number of measurement points makes it possible to take into account microcurvature of the wellbore. This helps to more accurately calculate the vertical depth of the well. Vertical depth is an extremely important parameter that affects the accuracy of penetrating the productive interval and further hydrocarbon recovery.
The accuracy of the Atlas gyro system sensors allows you to obtain borehole position data more accurately than the most modern telemetry systems (MWD, LWD) and inclinometers (EMS tools) in all attitude wells, including in horizontal wells. Due to its high accuracy, the Atlas gyro is a reliable tool for monitoring the quality of measurements MWD systems.
The compact size of the device (outer diameter 44.5 mm) allows to perform survey in wells with a minimum inner diameter of as small as 50 mm, including drop mode in the drillpipes 89-147 mm OD.
GYRO WHILE DRILLING
The Atlas Drilling High Precision Gyro can be integrated into the bottomhole assembly. This allows you to obtain real-time data while drilling. Two technologies are available: Gyro Steering and Gyro While Drilling (GWD). Gyro Steering allows drilling with downhole motors when communication with the gyroscope is carried out via a wireline (wet connect technology, coiled tubing drilling with wireline). In the Gyro While Drilling technology, the high-precision gyroscope module is integrated into the MWD system, and communication is carried out through its communication channels (mud pulse or electromagnetic channel).
Atlas Drilling gyro allows the real-time orientation of downhole equipment or whipstock. The Gyrocompass mode allows you to accurately orient the downhole equipment even at small inclinations (less than 5 degrees). In addition, our standard orientation procedure includes measuring the trajectory from wellhead to the kickoff point, which increases the information content when drilling sidetracks.
The Atlas Drilling High Accuracy Gyro supports all existing downhole equipment delivery systems (wireline, downhole tractor, coiled tubing, slickline, tubing, drop mode) and can work in memory mode and in real time mode. Versatility allows you to perform surveys as cost-effectively as possible.
The introduction of modern solid-state sensors has made it possible to significantly increase the reliability and autonomy of operation, in contrast to the devices of the previous generation – mechanical gyroscopes. Microelectromechanical (MEMS) gyroscopes withstand more vibration and shock loads compared to mechanical rate gyroscopes.