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Tool Configuration
Multi-Shot provides a complete MWD Tool that is fully retrievable and replaceable via wireline. The MWD is a positive pulse system, with the pulser located on the lower end of the tool and fits into a special muleshoe / orientation sub. The remainder of the tool is centered in standard non-magnetic drill collar (NMDC). This MWD tool is of the latest technology on the market for directional and gamma ray services and is modified to operate in most environmental conditions within the specified limits.
Down Hole Assembly
Fishing Head
Interconnect/Centralizer
Battery Package (optional)
Interconnect/Centralizer
Orientation Module/Microprocessor
Interconnect/Centralizer
Battery Package (primary)
Gamma Ray Module
Interconnect/Centralizer
Pulser Driver
Tool Diameter
1 7/8 in. Housing
Rubber centralizer diameter
dependent upon BHA
Self adjusting bowspring centralization
(operator selectable)
Tool Length
25 ft. directional only
32 ft. directional only w/ 2 battery packs
39 ft. directional/gamma w/ 2 battery packs
Tool Weight
150 - 200 lbs.
Longest Tool Module for Transit
8.0 ft.
Muleshoe/Orientation
3 1/2 in. O.D. - 7 3/4 in. O.D.
Other sizes available upon request
Sand and LCM Content
Maximum .5% sand for continuous operation
at maximum flow rate / higher content tolerable
at low flow rate. Lost circulation material,
maximum size and concentration recommended
(fine or course, 12 lb/bbl)
Power Source
Lithium battery - 150 to 200 hour duration dependent upon pulse transmission rate
Optional dual battery package downhole will double time ratio
Surface Equipment
Drillers remote terminal
Intrinsically safe power supply
Standpipe pressure transducer
Communications cables
Hookload Sensor
Laptop computer
Ink Jet Printer
Depth Encoder
Thermal Printer
Power cables
Rig phones
Maximum Operating Temperature
302°F (150°C) or 350°F (175° C)
Maximum Dogleg Severity
Determined by NMDC Equivalent bending
stiffness (performed 80° p/100’)
Maximum Operating Pressure
20,000 psi (138,000 kPa)
Pulsation Damper
Recommended charge to 40%
Pressure Drop Through Spacing
Dependent on drill fluid hydraulics, drill collar I.D., and signal orifice I.D. Approximately 100 psi @ 400 gpm
Mud Flow Rate Range
75-200 gpm, 3 1/2 in. O.D. NMDC
100-400 gpm, 4 3/4 in. O.D. NMDC
150-600 gpm, 6 1/2 in. O.D. NMDC
400-1000 gpm, 7 3/4 in. O.D. NMDC
Flow rates dependent on NMDC I.D.
Transmission Trigger
No flow acquisition, flow for transmission
Stop rotary for accurate survey
| Telemetry Data Measurement |
| Inclination (angle) |
Total Gravity |
| Azimuth (direction) |
Gravity tool face |
| Dip Angle |
Temperature |
| Total Magnetic Field |
Battery Voltage |
| Magnetic tool face |
Parameter warning flags |
| Gamma Ray Cts/Sec |
Depth Tracking |
Tool Face Update Period
14 – 52 seconds
Operator selectable
Directional Measurement
17.0 ft. upward from bottom of NMDC
Gamma Ray Detection Type
Scintillation
Gamma Measurement
0.0 ft. upward from bottom of NMDC
Surface Mud Screen
Recommended, 3/16 inch holes maximum
Down Link Capability
Tool configuration mode, rate, and sequence can be changed with tool downhole via cycling pump
Telemetry Data Transmission
Positive pulse
Typical pulse duration – 1.0 to 2.0 seconds
Retrievability
Complete tool via wireline utilizing a 13/16” fishing neck (retrievable at 0° angle and no less than 2 1/16” I.D. drill string)
Survey While Drilling
Not recommended, accuracy dependent on BHA movement
Environmental
Shock: 1000g, 0.5msec, ½ sine all axes Vibration: 5 to 20 Hz, 1 in. (double amplitude) 20 to 200 Hz, 30g, all axes
Survey Time
Normally 158 seconds
Dependent upon operating conditions and requirements
Tool Face Accuracy
± 0.5°
Inclination Accuracy
± 0.1°
Azimuth Accuracy
± 0.25°
Temp. Measurement Accuracy
± 1°
MTF/GTF Switching Inclination
0° - 45° Operator selectable
Tool Face, Azimuth, and Inclination Resolution
0.1° - 5.5° Operator selectable
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