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.
SureDrill-DDM Technical Data Sheet
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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