SureShot-EM

Electromagnetic Telemetry MWD System

Easily go where mud pulse telemetry cannot

Electromagnetic Telemetry MWD System

The APS SureShot™ EM telemetry MWD system communicates by transmitting electromagnetic waves through the formation instead of pressure pulses through a fluid column. Benefits include time saved by transmitting surveys during a connection, high data rates and the ability to operate in conditions where mud pulse telemetry cannot.

SureShot EM is compatible with all APS downhole sensors. The electromagnetic transmitter uses the same flow subs and is a drop-in alternative for the mud pulse transmitter, having many parts in common with the SureShot mud pulse MWD system. Operators benefit from reduced inventory cost and increased flexibility when providing a mix of EM and mud pulse MWD services.

SureShot EM Sub

SureShot EM is a state-of-the art system with a downhole tool featuring two-way electromagnetic communication. The sequence and frequency of transmitted measurements is EM downlink selectable. Whether it's a higher density log to pick a casing point, more pressure measurements for drilling optimization or emphasis on directional measurements while sliding, SureShot EM enables the operator to quickly choose the optimum data sequence for the drilling operation.

SureShot EM works with all APS downhole sensors. The EM transmitter uses the same flow subs and is a drop-in alternative for the mud pulse transmitter, having many parts in common with the SureShot mud pulse system. Operators benefit from reduced inventory cost and increased flexibility when providing a mix of EM and mud pulse MWD services.

SureShot EM Gear
Sureshot-EM allows the operator to choose the right mix of directional,
LWD and pressure measurements for any drilling situation.

Features & Benefits

  • Data rates up to 12 bps.
  • High-power 50 W transmitter for two-way EM communication.
  • Downhole selectable data sequences – choose the optimum combination of directional, LWD and pressure measurements for the drilling operation.
  • EM Downlinking – Quickly adjust power, bit rate, carrier frequency and telemetry sequences for the conditions.
  • Plug-and-play compatibility with APS SureShot downhole and surface equipment.
  • Operates with batteries or turbine alternator for extended bit runs and high current draw applications.
  • Unique rugged, reliable dual gap sub.
  • WPR™ resistivity compatible.
  • Fixed-mount and retrievable configurations are available.
  • Depth tracking options include the SureShot Depth Tracker, the SureShot mud pulse SIU and WITS.
SureShot EM Screen
SureShot EM Screen

Design

  • Quad-channel digital surface receiver to rapidly select the best signal from among 4 antenna pairs as the well progresses.
  • Gap sub is a dual-gap design for added reliability.
  • Ceramic sleeves prevent loss of power due to arcing.
  • No coating to wear and arc.
  • Dual insulator rings for greater reliability.
  • Higher power to the formation due to gap distance.

Applications

  • High ROP drilling with frequent surveys
  • High data density LWD and drilling optimization applications
  • Underbalanced drilling
  • Foam and air drilling
  • Extreme lost circulation conditions

Tool Specifications

SureShot-EM Technical Data Sheet

General Specifications

Downhole Transceiver
Data Rate1 to 12 bps uncompressed; selectable
Power Output2 to 50 W, selectable
Power Source2 - 4x 10 DD lithium battery or
APS Turbine Alternator + 1x 10 DD lithium battery
Downlink MethodsEM and flow
Downlink-adjustable ParametersData Rate
Power Output
Operating Frequency
Data/Survey Sequences
Survey-on-command
Operating Frequency2 to 12 Hz; selectable
Collar OD8.0 in.
6.75 / 6.50 in.
4.75 in.
204 mm
172 / 165 mm
121 mm
Flow Rate Limits8.0 in. – 300 to 1100 gpm
6.75 / 6.50 in. – 150 to 750 gpm
4.75 in. – 125 to 350 gpm
203 mm – 19 to 69 L/sec
171 / 165 mm – 9 to 47 L/sec
121 mm – 7.9 to 22 L/sec
Sand Content< 1% by volume recommended
Operating Temperature-13˚ to 302˚F-25˚ to 150˚C
Maximum Pressure20,000 psi138 MPa
Surface System
Operating Temperature32˚ to 158˚F0˚ to 70˚C
Storage Temperature14˚ to 185˚F-10˚ to 85˚C
Surface SensorsDepth encoder, hookload, standpipe pressure
SureShot MWD with EM
Downhole Configurations
Available PlatformsFixed-mount or retrievable
Fixed-mount SystemBattery
Battery and PWD
Turbine, battery and PWD
Retrievable SystemBattery
Battery and PWD
Available SensorsDirectional, gamma, vibration, WPR, annular and bore pressure
LengthEqual to mud pulse transmitter; 30 - 31 ft for DGMWD collar
Surface System
Surface SystemSurface receiver, downlink transmitter, laptop, rig floor display
Depth OptionsWITS, SureShot Depth Tracker, SIU 1 or SIU 2

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