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Downhole Drilling Dynamics Monitor
APS’s Drilling Dynamics Monitor (DDM™)* sub measures and records weight on bit, torque on bit, bending on bit, internal and annular pressure and temperature during drilling operations.
DDM measures and records weight on bit, torque on bit, bending on bit,
internal and annular pressure and temperature, all in real time.
internal and annular pressure and temperature, all in real time.
Features & Benefits
- Captured data may be transmitted in real time via APS’s SureShot™ MWD/LWD system, or stored in the DDM’s downhole memory for later download and analysis.
- Can be equipped with vibration monitoring to measure, calculate and record axial, lateral and angular downhole shock and vibration.
- Real-time vibration alarms may be transmitted via SureShot.
Design
- Available sizes: 4.75 in. (121 mm), 6.75 in. (172 mm) and 8.0 in. (204 mm).
Tool Specifications
SureDrill-DDM Technical Data Sheet
General Specifications
| Weight on Bit | 4-3/4 in. | 6-3/4 in. | 8 in. |
| Operating Range | ± 30,000 lbs | ± 60,000 lbs | ± 100,000 lbs |
| Accuracy | ± 5% absolute | ± 5% absolute | ± 5% absolute |
| Repeatability | ± 1% absolute | ± 1% absolute | ± 1% absolute |
| Resolution | 1% | 1% | 1% |
| Torque on Bit | |||
| Operating Range | ± 14,000 ft-lbs | ± 30,000 ft-lbs | ± 50,000 ft-lbs |
| Accuracy | ± 5% absolute | ± 5% absolute | ± 5% absolute |
| Repeatability | ± 1% absolute | ± 1% absolute | ± 1% absolute |
| Resolution | 1% | 1% | 1% |
| Bending on Bit | |||
| Operating Range | ± 11,000 ft-lbs | ± 45,000 ft-lbs | ± 45,000 ft-lbs |
| Accuracy | ± 5% absolute | ± 5% absolute | ± 5% absolute |
| Repeatability | ± 1% absolute | ± 1% absolute | ± 1% absolute |
| Resolution | 1% | 1% | 1% |
| Pressure - Bore & Annulus | |||
| Operating Range | 0-20,000 psi | 0-20,000 psi | 0-20,000 psi |
| Accuracy | 0.1% FSR | 0.1% FSR | 0.1% FSR |
| General | |||
| Borehole Size Range | 5-1/4 in. to 6-1/2 in. | 8-3/8 in. to 9-7/8 in. | 10-5/8 in. to 17-1/2 in. |
| Connection | 3-1/2 IF | 4-1/2 IF | 6-5/8 Reg. |
| Nominal O.D. | 5.25 in. / 4.90 in. necks | 7.25 in. / 6.91 in. necks | 8.22 in. / 8.00 in. necks |
| Nominal I.D. | 1.50 in. | 3.25 in. | 2.813 in. |
| Nominal Length (Shoulder - Shoulder) |
84.0 in. | 84.0 in. | 92.5 in. |
| Memory | 32 MB | 32 MB | 32 MB |
| Material | P550 | P550 | P550 |
| Environmental | |||
| Max. Sliding Bend Radius[1] |
24.0˚/100 ft | 22.0˚/100 ft | 20.0˚/100 ft |
| Max. Rotating Bend Radius[1] |
12.0˚/100 ft | 10.0˚/100 ft | 8.0˚/100 ft |
| Operating Temperature |
-15˚C to 150˚C 175˚C Option |
-15˚C to 150˚C 175˚C Option |
-15˚C to 150˚C 175˚C Option |
| Max. Survival Pressure | 26,500 psi | 26,500 psi | 26,500 psi |
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