Tantrum
The Tantrum is a downhole mechanical device that is used during drilling to reduce static friction and increase ROP. The axial vibration generated through a negative pressure pulse reduces drag and enables a more efficient transfer of weight onto bit.
Overview
As the pumping pressure acts to expand the shock sub, the localized compression at the tool (WOB transfer) acts to compress the tool. Once the stand pipe pressure is vented to the annulus, the shock sub spring energy and change in stand pipe pressure work together to contract the tool causing an axial force that effectively breaks static drill string friction.
Technical Specifications
| Tool ID (SRD-Shock Sub) | 5.00″ (127 mm) | 6.75″ (171 mm) |
|---|---|---|
| Overall Length | 227″ (5.76 m) | 250″ (6.35 m) |
| Weight | 800 lbs. (363 kg) | 1,500 lbs. (680 kg) |
| Low Flow | 100-250 gpm (0.38-0.95 m3/min) | 300-450 gpm (1.14-1.7 m3/min) |
| Standard Flow | 150-300 gpm (0.57-1.14 m3/min) | 300-650 gpm (1.14-2.46 m3/min) |
| High Flow | 300-650 gpm (1.14-2.46 m3/min) | 600-900 gpm (2.28-3.41 m3/min) |
| Maximum Operating Temperature | 300F (150C) | 300F (150C) |
| Operating Frequency | 3-4 Hz | 3-4 Hz |
| Operational Pressure Drop Generated | 200-400 psi (1,375-2,750 kPa) | 250-450 psi (1,720-3,100 kPa) |
| Max Pull | 380,000 lbs. (1,690 kN) | 693,000 lbs. (3,083 kN) |
| Torsional Load To Yield Body Connection | 17,000 ft.lbs. (23,050 Nm) | 48,000 ft.lbs. (65,080 Nm) |
| Connections (*Other Connections Available Upon Request) | 31/2 IF & 4 FH | 41/2 IF |
Additional Results
Example 1: Without a Tantrum from 9700ft-11400ft depth, slides were on average 6.5% of rotating ROP
Example 2: Series 2 Tantrum, from 11400ft-16300ft depth, sides were on average 23.3% of rotating ROP
Example 3: Tantrum from 163000ft-192000 depth, slides were on average 13.3% of rotating ROP
