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INSS
Surface Recording Gyro
Gyro Heat Shield System
EMMT (Electronic Mini Multi-Shot Tool)
Magnetic Multi-Shot
Digital
Single-Shot
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EMMT
(Electronic Mini Multi-Shot Tool)
The Electronic Mini Multishot Tool (EMMT) represents the leading technological edge in open-hole (drill pipe) survey instruments. The system’s small size (1.375" OD by 44") and extended operational performance differentiates it from conventional electronic multishot products.
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Applications
The EMMT can be positioned in small-diameter drill pipe and is particularly useful in coiled tubing operations. It can accommodate a radius of 35 feet compared to 80 feet for standard 1 3/4” OD multi-shot probes. It provides reliable sensor information for any type of directional drilling program. Short-radius applications can benefit from its small size and reliability in harsh drilling environments.
Components
The EMMT is made up of two main components: the multi-shot probe and surface computer. Within the probe there is a ruggedized fluxgate and accelerometer package which enable the direction and inclination of the borehole to be accurately measured. The probe is plugged into the surface computer where data is downloaded and processed.
Features
The EMMT has a built in QA checking feature and can be run in temperatures up to 150C(300F) without a heat shield. It reduces non-magnetic collar requirements through the use of patented short-collar azimuth correction techniques.
Technical Specifications
| Instrument Accuracy |
Inclination |
±0.1 deg |
Azimuth |
±0.5 deg |
Toolface |
±0.1 deg |
Operating Features |
Instrument (OD) |
1” |
Instrument Length |
44” maximum (including battery housing) |
Pressure Case OD |
1 3/8” |
Pressure Rating |
18,000 psi |
Temperature Range |
0—150°C (300°F) |
Shot Capacity |
3,000+ |
Power Source |
6 AAA alkaline or 2AA lithium batteries |
Battery Life |
Up to 150 hours (alkaline); 300 hours (lithium) |
Parameters Sampled |
Gx, y, z, Bx, y, z, temperature, battery voltage |
Surface Equipment |
IBM PC Compatible portable computer |
Minimum Shot Interval |
10 seconds |
Maximum Hold-Off Time |
200 hours |
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