MWD Tool Specifications

 

General    
OD. Tool 1 7/8 inches
OD Finns 2.0 – 3.25 inches
Length 20 – 28 feet
Weight 120- 200 lbm
Telemetry Type Positive Mud Pulse  
Pulse width .8 – 1.5 seconds
Retrievable 2 1/4" Min. ID  
Reinsertable 2 1/4" Min. ID  

 

Operating Parameters    
Max Temperature (static) 302, 320, 347 F
Max Pressure 20,000 psi
Flow Range 4 3/4" – 8” Tools 125 – 850 GPM (NMDC dependent)
Max Shock, Z axis, recorded,
(59 g peak recorded)
55 g’s, (50 events) 50 g’s, (500 events)
  40 g’s
(50,000events)
30 g’s
(500,000 events)
Vibration XY RMS,
(15 g peak recorded)
12 g (4 hour max), 9 g (40 hour max),
6 g (400 hour max)
Max Fluid Velocity (@tool OD) 40 feet/sec
Battery Life 350 – 800 Circ. Hours
Max Sand / Solids Content 0.5% / 20% % Wt.
LCM, well mixed
(Fibrous – Med Nutplug)
30 – 55 lbm/bbl
Pulsation Dampener 40 %SPP
Pressure Drop Variable appx. 28 psi / 100gpm

 

Accuracies Instrument Repeatability Nominal Resolution Unit
Inclination 0.2 0.1 0.1 + or – degrees
Azimuth (> 2.0 Inclination,
no magnetic interference)
0.25 – 1.0 0.25 – 1.0 0.1 + or – degrees
toolface 0.5 0.5 5.5 – 11 + or – degrees
Gamma 0.5 0.5 1.75 – 4.0 counts per second