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Well Deviation Downhole Motor
Add Time:2017-02-16 11:36:07 Views:

1. Vertical Well Section

For vertical well section drilling, tower drill assembly or pendulum drill assembly should be applied. Orient’s new bit with deviation change can transmit real-time deviation information and is easy to adjust bit weight to improve drilling speed.
For example: 20-40KN small bit weight is usually applied to prevent deviation change. The near bit deviation instrument is able to track the occurrence of deviation change and can increase the drill pressure up to 80 KN to release pressure. Measures will be taken when deviation change occurs, thus it can enhance the entire drilling speed.

2. deviated section

a) Sensor is installed the location of 0.5 m far from drill bit;
b) It is able to timely reflect the deviation and straightening of the drill assembly in abnormal formation, whilst common MWD finds the insufficient rate of deviation change after having drilling 20-30 meters, which causes trajectory accident.
For example, a horizontal well drilling into abnormal formation caused insufficient rate of deviation change. In order to confirm this result, the drilling activity continued and leaded to the non build-up of 40m. At later stage, the rate of deviation change failed to encounter the target. At last, the team had to backfill and made side drilling.

3. High Performance, Long Service Life

a) Measure deviation change when pump is on, and transmit signal when pump is off;
b) The transmission data contains: near bit deviation, MWD deviation and azimuth;
c) Fulfill the measuring and transmission in 3 minutes;
d) Low power consumption, electricity saving during vacant time and 800 hours of service life for single battery.