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Access multiple NOV applications and services with one login.
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MOCS G2 Circulation Sub
The next generation in circulation
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Description
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Resources
Description
The MOCS G2 is a multiple-opening circulation sub that's activated by and infinitely cycled with a single ball that changes the drilling fluid flow path from the ID of the string (non-bypass) to the annulus (bypass). By changing the flow regimes, you can cycle the tool between bypass and non-bypass modes an unlimited number of times. We developed this second-generation tool to improve drilling efficiency and reliability, reduce drilling costs, and enhance the safety of your operation.
Benefits
- Easy to use – Simple operation requires only one ball
- On-demand performance – Cycles in as little as 10 seconds with ball on seat
- Unlimited cycling – Flow rate actuation alleviates need for multiple balls
- Versatile – Can be loaded on surface and placed anywhere in the string
- Safe – Eliminates the need to break string at every cycle
- ID compatibility – Variable ball size allows for flexibility with various string IDs
- Reduced invisible lost time – No wasted trips for an exhausted ball catcher
- Designed to trip dry pipe – Ports shift closed when pumps are off, automatically draining to lower BHA
- Allows fishing operations below the tool – Open through bore before activation or by fishing ball
- Maintains well control safety – Automatically closes ports when pump flow is significantly reduced
Applications
- BHA protection
- Pumping lost-circulation material for lost circulation
- Spotting acid
- Wellbore clean-out
- Workover/completion operations
- Subsea riser/BOP jetting
- Hole cleaning while drilling
- Increasing annular velocities for improved cuttings/debris removal
- Borehole enlargement
- Cutting acceleration while reaming
- Control of underreamer function
- Coring
- Enhances hole cleaning
- Provides cutting relief
- Reduced lag time when circulating samples or displacing fluid
- Fishing
- Effectively used with the Agitator™ system
Non Bypass Mode
Bypass Mode
Unactivated Mode
Reset Mode
