Shanghai Shirui International Trading Co., Ltd.
Main products:Towel,Beach Towel,Compress Towel
Contact Us
  • Contact Person : Ms. HAN HELEN
  • Company Name : Shanghai Shirui International Trading Co., Ltd.
  • Tel : 0086-21-55156193
  • Fax : 0086-21-55156192
  • Country/Region : China
  • Zip : 200124

Near Bit Ejector Unit

Near Bit Ejector Unit
Product Detailed
improve the bottom hole flow field; stop the bit from balling; increase drilling rate via making full use of hydraulic power.

It is generally known that rate of penetration (ROP) is one of main factors having an influence on cost-performance characteristics of drilling. We analyzed the progress trends of drilling trends and developed a original ejector device – near-bit ejector unit (NBEU) for drilling rate increase. It can be used on rotary drilling, on drilling with PDM and on turbine motor drilling. It is Antiballing device.


Principle of Work:

Firstly, the drilling fluid enters the steering device where the drilling fluid accelerates, changes its flow direction and drives the impeller rotating around the impeller shaft at a very high speed. Meanwhile, the open area of the impeller case changes timely as a result of the rotation of impeller, which produces the periodic pulsation of the pressure. Then the periodic pulsation will be enlarged in the pressure self-oscillator. When the drilling fluid goes through the self-oscillator, the intense pulsating vortex will form at the exit of the self-oscillator, which can drive the drilling fluid shock and crack the formation while drilling. In addition, the intense pulsating vortex can clean the bit better and stop the bit balling.


• Increase ROP and bit footage, save the bits.• Save drilling time and minimize number of trips to change the bit.• Antiballing tool.• Available for any bit size.• Could be manufacture for any standard by customer request.• Better caliper logs results.

When ordering, please specify :- Size of the drill bit..- Connection types.

Near Bit Ejector Unit

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