... Abstract There are several reasons for obtaining gyroscopic surveys in directional wells. A gyro measurement provides reliable data when magnetic measurements are affected by interference from nearby wells; it can significantly reduce the positional uncertainty and provides redundancy data...

... drilling spinning mass technologies. This paper will highlight a new sophisticated but rugged type of gyro surveying system derived from solid state sensing technology. It will provide case studies as to the novel gyro systems accuracy when compared to other survey technologies such as conventional gyro...

... with magnetic interference. Proximity to casing hinders the ability of conventional MWD tools to function and therefore, a drilling BHA with an integrating rate GyroMWD (GMWD) was deployed in this well. Rate gyro measurements are based on the earth's spin axis and can provide accurate real time survey data...

.... The general gyro error model consists of a new set of error terms and a mathematical description of how the different error sources contribute to position uncertainties dependent on sensor configurations and operational modes. The model is suitable for appropriate modelling of most gyro surveying services...

.... Why is it so difficult to build a gyroscope into an MWD tool, and why don't we have one available for commercial use in the industry today? Also, what should oil companies expect from a service company who promises an "MWD Gyro Tool" in the next year or two? Currently there are several service...

... is the operational organisation, and details of the activities following intersection, which included stabilisation, cleanout and abandonment of almost 1,000m of borehole which had been inaccessible for over 3 years. P. 367 magnetic interference azimuth relief well gyro trajectory mwd upstream oil...

... surveys are discussed in depth. Borehole proximity technology and advances in that technology is addressed. blowout gyro well control wellspot single shot data feet tvd marshall feet md tvd intercept leon county upstream oil & gas relief well annular pressure drilling magnetic...

... ABSTRACT A 5 inch diameter high accuracy borehole surveying instrument has been developed using a full 3 axis inertial navigation system (INS). It has the following features: 3 Ring Laser Gyros No mechanical gimbals Real-time surface readout Obtains position data directly without...

... reduced by virtue of the high traverse speeds possible and freedom from time dependent gyro drift sampling necessary with directional gyros. Field results to date indicate that positional accuracy is also consistently improved by elimination of systematic errors due to initial gyro alignment, gyro drift...