SureLog-DDM

Downhole Drilling Dynamics Monitor

Drilling insights that reduce downtime

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.

SureLog DDM Sub
DDM measures and records weight on bit, torque on bit, bending on bit,
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.
SureLog DDM Sub Side

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 Bit4-3/4 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
Resolution1%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
Resolution1%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
Resolution1%1%1%
Pressure - Bore & Annulus
Operating Range0-20,000 psi0-20,000 psi0-20,000 psi
Accuracy0.1% FSR0.1% FSR0.1% FSR
General
Borehole Size Range5-1/4 in. to 6-1/2 in.8-3/8 in. to 9-7/8 in.10-5/8 in. to 17-1/2 in.
Connection3-1/2 IF4-1/2 IF6-5/8 Reg.
Nominal O.D.5.25 in. / 4.90 in. necks7.25 in. / 6.91 in. necks8.22 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.
Memory32 MB32 MB32 MB
MaterialP550P550P550
Environmental
Max. Sliding
Bend Radius[1]
24.0˚/100 ft22.0˚/100 ft20.0˚/100 ft
Max. Rotating
Bend Radius[1]
12.0˚/100 ft10.0˚/100 ft8.0˚/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 Pressure26,500 psi26,500 psi26,500 psi

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