Neotork’s low-friction mandrel and cable-based design sets it apart from other vibration suppression systems. The flexibility of the cables combined with the low friction coefficient of the mandrel allows the tool to react almost instantaneously to changes in downhole conditions, rather than waiting for vibrations to build up before responding.

Neotork works by maintaining a constant mechanical equilibrium between opposing forces. On one side, the spring stack opening force and the pressure drop below the tool push to extend it. On the other, the Weight on Bit and the torque at the bit work to compress it. As formation hardness, torque, and WOB vary in real time, this balance shifts continuously, and the tool adjusts the drill bit depth of cut accordingly.

The contraction itself happens through the cable mechanism, which wrap around the low-friction mandrel and shorten the tool as torque and WOB increase, compressing the spring stack in the process. When conditions ease, the springs push the tool back out. This mechanical feedback loop runs constantly throughout the run.

Yes. The clearest measure of Neotork’s action is the performance it delivers in the well: reduced vibrations, improved ROP, and better hole condition. These are the outcomes that matter to the run, and they are the most reliable evidence that the tool is working as intended.

For operators who want a direct read on the activation itself, two complementary diagnostics are available. Neosmart is an optional embedded sensor package that records downhole vibrations in three dimensions and tracks the tool’s axial movements at high sampling frequency, with data retrieved at surface for full post-run reconstruction. A mechanical stroke indicator offers a simpler, robust alternative — a consumable part scratched by the shaft as the tool strokes downhole, then inspected at the workshop to confirm activation.

Neotork is designed for dysfunctions that originate at the bit-formation interface — torque fluctuations, stick-slip, axial bit bounce, and the vibrations that develop from them. These represent the majority of performance-limiting events in most wells. Friction or torque originating from higher in the BHA, such as drag against the wellbore or stabilizer contact, falls outside Neotork’s scope and is best managed through BHA design and operational practice.

Lateral vibrations are often a downstream effect of torsional dysfunction at the bit. By keeping the cutters continuously engaged and preventing the angular velocity of the BHA from swinging through critical RPM bands, Neotork addresses the root cause and noticeably improves drilling harmonics.

HFTO typically develops from torsional instability at the bit-formation interface — the same dynamic Neotork is designed to address. Because the tool reacts almost instantaneously to torque variations, it dampens the underlying disturbance before it can build into the high-frequency regime, contributing to a smoother torsional signature across the run.

Neotork acts on the interaction between the bit and the formation, the largest source of drilling dysfunctions downhole. It is positioned in the lower portion of the BHA, as close to the bit as the rest of the assembly allow, so it can read and respond directly to bit-driven torque variations. A minimum spacing of 10 ft is recommended between Neotork and any stabilizer, so it stays focused on the bit-formation signal rather than friction generated higher in the BHA. Final placement is reviewed during job planning, and our team makes specific recommendations based on the BHA configuration and the section being drilled.

No. The tool’s axial stroke is too small and too slow to displace enough mud to produce a detectable pulse or interfere with the MWD signal frequency band.

By preventing stick-slip and keeping the bit continuously engaged, Neotork makes drilling more stable and improves the steering response of both motors and rotary steerable systems. Operators have reported re-runs of RSS and MWD packages thanks to the reduction in damaging shocks and vibrations.

Yes. Neotork and a motor are a strong combination. Because Neotork reacts directly to torque variations downhole, it smooths the spikes that would otherwise propagate to the motor and cause it to stall. This lets operators run higher differential pressure across the motor — capturing the ROP gains that come with it — while significantly reducing stall risk.

Yes. Neotork is suitable for vertical, deviated, and horizontal sections and has been proven in each. The configuration of the tool is adjusted to match the expected loads in each section, and it is fairly common for a single Neotork to drill through all three in one run.

When coring through mixed formations, Neotork reduces reactive shocks at formation transitions and lowers the risk of jamming the core barrel. The driller should keep in mind that the smoother torque trace means a stalled core is harder to detect from the torque signal alone, and other indicators should be monitored.

Milling is a high-stall-risk operation. Neotork’s continuous depth-of-cut management keeps the bit engaged and reduces the chance of stalling.

There is no RPM limit. As long as the tool has been configured for the expected hole parameters, its design accommodates the full range of standard drilling RPMs.

Neotork is rated for the standard temperature envelope of conventional drilling operations. For applications approaching the upper limit, including geothermal, please refer to the relevant tool specification sheet or contact us directly so we can confirm suitability for your job.

Neotork only modulates compression in the lower BHA; it does not generate tension and cannot pull the bit off bottom. The tool contracts only when the cutters have a firm grip in the formation and torque and WOB exceeds the preset threshold.

Each Neotork is configured to the drilling envelope of the well. Working from the expected operating parameters, our engineering team selects the spring stack so the tool’s activation threshold sits within the right operational window. The tool is then fully assembled at our workshop and arrives on the rig ready to run.

Each Neotork is configured with built-in tolerance around the expected drilling envelope, so it continues to perform across normal variations in WOB and torque during the run. Accurate parameter forecasting at the planning stage is part of every project. We review the expected envelope with the operator so the configuration matches the conditions in the well.

Drilling continues safely. Neotork is engineered with an internal locking mechanism that engages if a cable were to break downhole, preventing free-spinning while the disc spring stack continues to damp axial shocks. The BHA stays protected until the next planned trip.

No. Neotork is designed as an unmanned tool. It arrives fully assembled with all internal components torqued at the workshop, and the upper box and lower pin connections meet API standards.

A standard surface check can be performed on the rig to verify the tool’s status between runs, including external inspection, connections, and basic function. Full service is carried out only at a Neo-Oiltools workshop or at an authorised partner service centre.

Neotork has a generic 200 rotating-hours service interval, with a standard surface check before each run when the tool is being reused.

There are caveats depending on specific usages provided in the rig site procedure.

Neotork is supplied through Neo-Oiltools and a network of authorised regional distributors covering Europe, North America, Latin America, the Middle East and Asia. Contact details for each region are available on the Neotork website.

Job planning and on-the-job support is handled through Neo-Oiltools’ regional distributors, who help with BHA placement, tool configuration, and any technical questions during the run. Neo-Oiltools remains available at any time for additional technical support if needed.