XT-NLI Series Downhole Torsional Impactor with 60–120 J Impact Energy and 20–40 Hz Frequency for Hydraulic Drilling Fluid Power
The XINGTONG XT-NLI Series Torsional Impact Tool is a hydraulically powered downhole drilling tool designed to enhance the rock-breaking efficiency of PDC drill bits.
The tool converts hydraulic energy from high-pressure drilling fluid into high-frequency torsional impacts. Alternating pressure between internal chambers drives the rotating valve mechanism, generating circumferential oscillations and delivering repeated torsional impact energy to the drill bit.
Designed for directional drilling, horizontal wells and challenging formations, the XT-NLI Series can be integrated with compatible mud motors, near-bit tools and conventional bottom hole assemblies (BHAs).
- Enhanced Rock-Breaking Efficiency: High-frequency torsional impacts assist PDC cutters in breaking rock, helping improve drilling efficiency and Rate of Penetration (ROP).
- Improved Drilling Stability: The torsional impact mechanism helps reduce torque build-up and mitigate stick-slip vibration, supporting more consistent drilling performance.
- Bit Protection & Reduced Failure Risk: By helping manage torque peaks and impact loading, the tool supports smoother operation and may reduce the risk of bit and downhole tool damage.
- Fully Hydraulic Operation: Operates using drilling fluid energy without downhole electronics, providing a straightforward mechanical impact mechanism.
- Flexible Downhole Integration: Available in multiple sizes for use with compatible PDC bits, mud motors and bottom hole assemblies. Connections can be evaluated according to project requirements.
| Parameter | XT-NLI-127 | XT-NLI-135 | XT-NLI-172 |
|---|---|---|---|
| Tool Diameter | 127 mm | 135 mm | 172 mm |
| Structural Length | 520-560 mm | 560-600 mm | 600-650 mm |
| Operating Flow Rate | 18 L/s | 25 L/s | 35 L/s |
| Pressure Drop | 1.0-1.3 MPa | 1.2-1.5 MPa | 1.3-1.7 MPa |
| Impact Frequency | 20-28 Hz | 26-34 Hz | 32-40 Hz |
| Torsional Impact Energy | 60-80 J | 80-100 J | 90-120 J |
| Instantaneous Impact Torque | 1400-1700 N*m | 1600-2100 N*m | 1900-2500 N*m |
| Upper Connection | 3 1/2 REG | 3 1/2 REG | 4 1/2 REG |
| Lower Connection | 3 1/2 REG | 3 1/2 REG | 4 1/2 REG |
Stage 1 - Energy Storage: High-pressure drilling fluid drives the internal rotating valve mechanism, allowing hydraulic energy to accumulate within the pressure chamber.
Stage 2 - Impact Release: The valve mechanism switches between pressure chambers, generating rapid circumferential oscillations and releasing torsional impact energy to support rock breaking.
- Oil and gas drilling
- PDC bit drilling optimization
- Directional and horizontal wells
- Challenging and complex formations
- Compatible mud motor and near-bit assemblies
XINGTONG provides model selection and technical consultation based on drilling conditions, operating flow rate, tool dimensions and connection requirements.
Contact us with your drilling application and required specifications to identify a suitable torsional impact tool configuration.
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