HI TOOL™ tackles lateral and torsional vibrations in problematic slim-hole underreaming application

Drilling Technologies

Customer challenges

Expro was contacted by Schlumberger (SLB) Australia to support their current project with a customer where they provided directional drilling services
The customer was experiencing severe vibrations in the two wells in the same sections where underreamers were utilized for small ratio hole opening (6” x 6-3/4” and 6” x 7”)
The vibration dynamics generated by having multiple cutting structures in the BHA, hampers drilling performance; reduced rate of penetration and footage drilled while negatively affecting BHA durability
Expro’s Harmonic Isolation Tool (HI TOOL™) has a good track record performance in country in mitigating vibration in multiple BHA applications

Expro Excellence

Expro’s patented HI TOOL™ has been designed to dampen detrimental vibrations. The tool’s elastomeric “Anti-Vibration Rings” and spherical geared connection allows for minute flex / tilt to occur between the axis of the upper body and lower body which helps to dampen and decouple the BHA without having any manipulation towards drilling input energy. As a result, vibration generated by drill bit, underreamer, and bottom hole assembly are minimally transmitted along the string and drill strings dynamics can be improved allowing better drilling performance
One of the main challenges of this project was the relatively long 2,013m lateral drilling and under reaming section with the Rotary Steerable BHA
If Expro did not provide a solution there would have been premature damage in drill bit and underreamer cutting structure, potential BHA failure, shorter footage and/or slower drilling penetration rate

Value to client

This vibration mitigation allowed for improved drilling efficiency for the customer, giving drilling stabilization
Drilling assembly can concentrate more of its input energy into penetrating the rock as less energy is lost due to instability, vibration, and negative drilling dynamics
Expro drilled 2,013m of larger opening ratio from 2,000mMD to 4,013mMD, double the meterage of the offset well, over 93.5hrs drilling hours with good ROP 23.4m/hr. while significantly mitigating stick-slip

Customer challenges

Expro was contacted by Schlumberger (SLB) Australia to support their current project with a customer where they provided directional drilling services
The customer was experiencing severe vibrations in the two wells in the same sections where underreamers were utilized for small ratio hole opening (6” x 6-3/4” and 6” x 7”)
The vibration dynamics generated by having multiple cutting structures in the BHA, hampers drilling performance; reduced rate of penetration and footage drilled while negatively affecting BHA durability
Expro’s Harmonic Isolation Tool (HI TOOL™) has a good track record performance in country in mitigating vibration in multiple BHA applications

Expro Excellence

Expro’s patented HI TOOL™ has been designed to dampen detrimental vibrations. The tool’s elastomeric “Anti-Vibration Rings” and spherical geared connection allows for minute flex / tilt to occur between the axis of the upper body and lower body which helps to dampen and decouple the BHA without having any manipulation towards drilling input energy. As a result, vibration generated by drill bit, underreamer, and bottom hole assembly are minimally transmitted along the string and drill strings dynamics can be improved allowing better drilling performance
One of the main challenges of this project was the relatively long 2,013m lateral drilling and under reaming section with the Rotary Steerable BHA
If Expro did not provide a solution there would have been premature damage in drill bit and underreamer cutting structure, potential BHA failure, shorter footage and/or slower drilling penetration rate

Value to client

This vibration mitigation allowed for improved drilling efficiency for the customer, giving drilling stabilization
Drilling assembly can concentrate more of its input energy into penetrating the rock as less energy is lost due to instability, vibration, and negative drilling dynamics
Expro drilled 2,013m of larger opening ratio from 2,000mMD to 4,013mMD, double the meterage of the offset well, over 93.5hrs drilling hours with good ROP 23.4m/hr. while significantly mitigating stick-slip

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