The unique valve system is the heart of the tool it converts the energy available from the pumped fluid into a series of pressure fluctuations (pressure pulses).
It is the axial motion of the shock tool or coiled tubing which breaks static friction. The power section drives the valve section producing pressure pulses which in turn activate the shock tool or act on the coiled tubing. Valve moves to other extremityTFA minimized = pressure peakįig. Valve moves to center TFA maximized = pressure troughģ. Valve moves to one extremity TFA minimized = pressure peakĢ. Running on jointed pipe = use a shock tool Running on coiled tubing = coiled tubing does the shock tools jobġ. The Agitator system relies on three main mechanisms:1. Note: Please contact NOV for up to date information. It has also proven beneficial in running liners and in the retrieval of stuck assemblies. The Agitator has been used to convey memory logs, perforating guns and to slide stuck tubing sleeves at the end of tortuous completion strings. The Agitator allows steerable motors to expand the boundaries of extended reach drilling, and enhances their efficiency in less complex applications.įriction also plagues intervention work. MWD/LWD Compatibility Does not damage MWD tools or corrupt signals Reduces lateral and torsional vibration Run above or below MWD No impact force to bit or tubularsīit Friendly Can be used with roller cone bit or fixed cutter bits No impact forces to damage teeth or bearings Extends PDC life through controlled weight transfer no spuddingĭirectional Enhancement Prevents weight stacking and allows excellent tool face control Provides means of sliding at increased ROP and lower weight off hook Allows weight transfer with less drill pipe compression The Agitator is compatible with all MWD systems and provides a viable means of extending long reach targets while improving ROP, reducing roller cone bit runs and minimizing the chance of differential sticking. Extended intervals can be achieved and the lack of requirement to work the BHA - to obtain and maintain tool face - provides significant ROP improvements. Smooth weight transfer and exceptional tool face control is now possible with PDC bits, even in significantly depleted formations after large azimuth changes. As well profiles become more tortuous and the limits of extended reach boundaries are explored, the Agitator provides a simple means of expanding the operating window of conventional steerable motor assemblies. This means improved weight transfer and reduced stick-slip in all modes of drilling, but especially when oriented drilling with a steerable motor. The Agitator gently oscillates the BHA or drillstring to substantially reduce friction. All information is furnished in good faith, and the use of this information is entirely at the risk of the user. However, NOV makes no warranties or representations to that effect. The information contained within this handbook is believed to be accurate and is based upon run histories and empirical data.
Specifications and Guidelines.35ħ.3 Dog Leg Severity (DLS). Our objective is to exceed our customers expectations, improve their economics and be an integral part of their strategies.ġ.
Our complete range of solutions for the bottom hole assembly and related equipment includes:ĭrill Bits Drilling Motors Borehole Enlargement Drilling Tools and Products Coring Services Fishing Tools Intervention and Completion Tools Service Equipment Advanced Drilling Solutions We take pride in delivering superior performance and reliability. We have the expertise to optimize BHA selection and performance, supporting over 150 locations in more than 80 countries. NOV Downhole is the largest independent downhole tool and equipment provider in the world. The technical data and text in this handbook is subject to change without notice.
Please feel free to contact any of our locations with questions not answered in this handbook. This handbook is intended to be an aid to the operator and is solely provided for information and illustration purposes.