SureDrill-AVD™

APS’s Active Vibration Damper (AVD™)* is a standalone downhole tool that autonomously adapts to changing downhole BHA motion in real time to minimize axial, lateral and torsional drill string vibration. The AVD has demonstrated 50% improvements in rate of penetration (ROP) and doubling of bit life in the field due to reduced vibration. Other downhole drill string components, like MWD / LWD tools, also benefit from lower vibration.

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Active vibration damper for downhole drilling

Structurally, the AVD is similar to a shock-sub, with the addition of a damper section that has programmable stiffness. The damper chamber is filled with a magnetorheological fluid that has electronically controlled viscosity. An integrated motion sensor measures displacement several times per second and changes the damping factor over a 7-to-1 range based on observed drilling conditions.

By keeping tool string damping in the right range for current drilling conditions, the AVD significantly reduces vibration, maintaining the bit in better contact with the formation and increasing ROP.

FEATURES & BENEFITS

  • Self-contained drilling tool with no calibration or other rig maintenance required.

  • Records vibration data for later download.

Design

  • Tool Size: 7.00 in. or 9.50 in. (178 mm or 241 mm) O.D.; 1.89 in. (48 mm) I.D. for 6.75 in. and 7.00 in. O.D., 3.00 in. (76 mm) I.D. for 9.50 in. O.D.
  • Structurally similar to a shock-sub, with the addition of a damper section that has programmable stiffness.

 ACTIVE VIBRATION DAMPER SUB (AVD™)

Product Specifications

Mechanical
Tool Size 6.75 in. / 7.00 in. (171 mm / 178 mm) O.D. 1.89 in. (48 mm) I.D. 9.50 in. (241 mm) O.D. 3.00 in. (76 mm) I.D.
API Connection NC-50 7-5/8 Reg.
Length 32 ft (9.75 m) shoulder-to-shoulder
Weight (approx.) 6.75 in. tool: 3,100 lb (1,406 kg) 7.00 in. tool: 3,395 lb (1,540 kg) 5,825 lb (2,642 kg)
Environmental
Pressure 20 kpsi (137.9 MPa)
Operating Temperature 68˚ to 302˚F (20˚ to 150˚C)
Max. Overpull to Re-run 340,000 lb (154,221 kg) 570,000 lb (258,548 kg)
Overpull to Failure 745,000 lb (337,926 kg) 1,250,000 lb (566,990 kg)
Max. Operating Torque 26,500 ft*lb (35,929 N*m) 90,000 ft*lb (122,024 N*m)
Yield Torque 35,500 ft*lb (48,131 N*m) 120,000 ft*lb (162,698 N*m)
Dogleg Severity Sliding: 18˚/100 ft (18˚/30 m)† Rotating: 13˚/100 ft (13˚/30 m)† Sliding: 14˚/100 ft (14˚/30 m) Rotating: 8˚/100 ft (8˚/30 m)
Performance
Power Built-in turbine/alternator
Max. Static WOB 52,250 lb (23,700 kg) 100,000 lb (45,359 kg)
Max. Instantaneous WOB 75,000 lb (34,020 kg) 165,000 lb (74,843 kg)
Maximum Shock Sensed Lateral: 120 g Axial: 60 g
Shock Resolution 0.2 g minimum
Damping 1,000 - 6,000 lb*s/in. (18,000 - 107,000 kg*s/m)
Dynamic Stiffness 15,000 - 150,000 lb/in. (2,680 - 26,800 kg/cm)